diff options
226 files changed, 16621 insertions, 8884 deletions
diff --git a/SConstruct b/SConstruct index 038d42f946..80d39403ba 100644 --- a/SConstruct +++ b/SConstruct @@ -112,6 +112,7 @@ if profile: opts=Variables(customs, ARGUMENTS) opts.Add('target', 'Compile Target (debug/release_debug/release).', "debug") +opts.Add('arch', 'Platform dependent architecture (arm/arm64/x86/x64/mips/etc)', "") opts.Add('bits', 'Compile Target Bits (default/32/64/fat).', "default") opts.Add('platform','Platform: '+str(platform_list)+'.',"") opts.Add('p','Platform (same as platform=).',"") @@ -276,7 +277,9 @@ if selected_platform in platform_list: else: suffix+=".debug" - if (env["bits"]=="32"): + if env["arch"] != "": + suffix += "."+env["arch"] + elif (env["bits"]=="32"): suffix+=".32" elif (env["bits"]=="64"): suffix+=".64" diff --git a/bin/tests/test_math.cpp b/bin/tests/test_math.cpp index 22d14ada34..9110f72620 100644 --- a/bin/tests/test_math.cpp +++ b/bin/tests/test_math.cpp @@ -40,6 +40,9 @@ #include "scene/resources/texture.h" #include "vmap.h" #include "os/os.h" + +#include "method_ptrcall.h" + namespace TestMath { @@ -105,8 +108,12 @@ uint32_t ihash3( uint32_t a) return a; } + + + MainLoop* test() { + return NULL; { diff --git a/core/io/http_client.cpp b/core/io/http_client.cpp index 0dfae6584b..2a831dd992 100644 --- a/core/io/http_client.cpp +++ b/core/io/http_client.cpp @@ -29,8 +29,6 @@ #include "http_client.h" #include "io/stream_peer_ssl.h" -VARIANT_ENUM_CAST(HTTPClient::Status); - Error HTTPClient::connect(const String &p_host, int p_port, bool p_ssl,bool p_verify_host){ diff --git a/core/io/http_client.h b/core/io/http_client.h index ceb0273a7d..32d2e72101 100644 --- a/core/io/http_client.h +++ b/core/io/http_client.h @@ -201,5 +201,6 @@ public: }; VARIANT_ENUM_CAST(HTTPClient::Method); +VARIANT_ENUM_CAST(HTTPClient::Status); #endif // HTTP_CLIENT_H diff --git a/core/make_binders.py b/core/make_binders.py index 93371dc0a3..c14f07ac83 100644 --- a/core/make_binders.py +++ b/core/make_binders.py @@ -48,7 +48,13 @@ public: $ifnoret return Variant();$ } +#ifdef PTRCALL_ENABLED + virtual void ptrcall(Object*p_object,const void** p_args,void *r_ret) { + T *instance=p_object->cast_to<T>(); + $ifret PtrToArg<R>::encode( $ (instance->*method)($arg, PtrToArg<P@>::convert(p_args[@-1])$) $ifret ,r_ret)$ ; + } +#endif MethodBind$argc$$ifret R$$ifconst C$ () { #ifdef DEBUG_METHODS_ENABLED _set_const($ifconst true$$ifnoconst false$); @@ -121,7 +127,12 @@ public: $ifret return Variant(ret);$ $ifnoret return Variant();$ } - +#ifdef PTRCALL_ENABLED + virtual void ptrcall(Object*p_object,const void** p_args,void *r_ret) { + __UnexistingClass *instance = (__UnexistingClass*)p_object; + $ifret PtrToArg<R>::encode( $ (instance->*method)($arg, PtrToArg<P@>::convert(p_args[@-1])$) $ifret ,r_ret) $ ; + } +#endif MethodBind$argc$$ifret R$$ifconst C$ () { #ifdef DEBUG_METHODS_ENABLED _set_const($ifconst true$$ifnoconst false$); @@ -243,10 +254,3 @@ def run(target, source, env): f=open(target[1].path,"w") f.write(text_ext) f.close() - - - - - - - diff --git a/core/math/bsp_tree.h b/core/math/bsp_tree.h index 2bfc26b51e..6c36d80e3e 100644 --- a/core/math/bsp_tree.h +++ b/core/math/bsp_tree.h @@ -34,8 +34,8 @@ #include "face3.h" #include "vector.h" #include "dvector.h" - #include "variant.h" +#include "method_ptrcall.h" /** @author Juan Linietsky <reduzio@gmail.com> */ @@ -138,4 +138,29 @@ bool BSP_Tree::convex_is_inside(const T& p_convex) const { } +#ifdef PTRCALL_ENABLED + + +template<> +struct PtrToArg<BSP_Tree> { + _FORCE_INLINE_ static BSP_Tree convert(const void* p_ptr) { + BSP_Tree s( Variant( *reinterpret_cast<const Dictionary*>(p_ptr) ) ); + return s; + } + _FORCE_INLINE_ static void encode(BSP_Tree p_val,void* p_ptr) { + Dictionary *d = reinterpret_cast<Dictionary*>(p_ptr); + *d=Variant(p_val); + } +}; + +template<> +struct PtrToArg<const BSP_Tree&> { + _FORCE_INLINE_ static BSP_Tree convert(const void* p_ptr) { + BSP_Tree s( Variant( *reinterpret_cast<const Dictionary*>(p_ptr) ) ); + return s; + } +}; + +#endif + #endif diff --git a/core/math/face3.h b/core/math/face3.h index bc34be9935..3a81da74db 100644 --- a/core/math/face3.h +++ b/core/math/face3.h @@ -264,4 +264,6 @@ bool Face3::intersects_aabb2(const AABB& p_aabb) const { } +//this sucks... + #endif // FACE3_H diff --git a/core/method_bind.h b/core/method_bind.h index 48848c5848..30a848270d 100644 --- a/core/method_bind.h +++ b/core/method_bind.h @@ -33,6 +33,7 @@ #include "variant.h" #include "object.h" #include <stdio.h> +#include "method_ptrcall.h" /** @author Juan Linietsky <reduzio@gmail.com> @@ -85,6 +86,32 @@ struct VariantCaster<const T&> { (VariantCaster<P##m_idx>::cast( (m_idx-1)>=p_arg_count?get_default_argument(m_idx-1):*p_args[m_idx-1] )) //SIMPLE_NUMERIC_TYPE is used to avoid a warning on Variant::get_type_for + +#ifdef PTRCALL_ENABLED + + +#define VARIANT_ENUM_CAST( m_enum ) \ +SIMPLE_NUMERIC_TYPE( m_enum );\ +template<> \ +struct VariantCaster<m_enum> {\ +\ + static _FORCE_INLINE_ m_enum cast(const Variant& p_variant) {\ + return (m_enum)p_variant.operator int();\ + }\ +};\ +template<>\ +struct PtrToArg< m_enum > {\ + _FORCE_INLINE_ static m_enum convert(const void* p_ptr) {\ + return m_enum(*reinterpret_cast<const int*>(p_ptr));\ + }\ + _FORCE_INLINE_ static void encode(m_enum p_val,const void* p_ptr) {\ + *(int*)p_ptr=p_val;\ + }\ +}; + +#else + + #define VARIANT_ENUM_CAST( m_enum ) \ SIMPLE_NUMERIC_TYPE( m_enum );\ template<> \ @@ -96,6 +123,9 @@ struct VariantCaster<m_enum> {\ }; +#endif + + #define CHECK_ARG(m_arg)\ if ((m_arg-1)<p_arg_count) {\ Variant::Type argtype=get_argument_type(m_arg-1);\ @@ -222,6 +252,11 @@ public: } #endif virtual Variant call(Object* p_object,const Variant** p_args,int p_arg_count, Variant::CallError& r_error)=0; + +#ifdef PTRCALL_ENABLED + virtual void ptrcall(Object* p_object,const void** p_args,void* r_ret)=0; +#endif + StringName get_name() const; void set_name(const StringName& p_name); _FORCE_INLINE_ int get_method_id() const { return method_id; } @@ -277,6 +312,11 @@ public: #endif } +#ifdef PTRCALL_ENABLED + virtual void ptrcall(Object* p_object,const void** p_args,void* r_ret) {} //todo +#endif + + void set_method(NativeCall p_method) { call_method=p_method; } virtual bool is_const() const { return false; } virtual String get_instance_type() const { return T::get_type_static(); } diff --git a/core/method_ptrcall.h b/core/method_ptrcall.h new file mode 100644 index 0000000000..e38d59fd8f --- /dev/null +++ b/core/method_ptrcall.h @@ -0,0 +1,354 @@ +#ifndef METHOD_PTRCALL_H +#define METHOD_PTRCALL_H + +#include "typedefs.h" +#include "math_2d.h" +#include "variant.h" + +#ifdef PTRCALL_ENABLED + +template<class T> +struct PtrToArg { + +}; + +#define MAKE_PTRARG(m_type) \ +template<>\ +struct PtrToArg<m_type> {\ + _FORCE_INLINE_ static m_type convert(const void* p_ptr) {\ + return *reinterpret_cast<const m_type*>(p_ptr);\ + }\ + _FORCE_INLINE_ static void encode(m_type p_val, void* p_ptr) {\ + *((m_type*)p_ptr)=p_val;\ + }\ +};\ +template<>\ +struct PtrToArg<const m_type&> {\ + _FORCE_INLINE_ static m_type convert(const void* p_ptr) {\ + return *reinterpret_cast<const m_type*>(p_ptr);\ + }\ + _FORCE_INLINE_ static void encode(m_type p_val, void* p_ptr) {\ + *((m_type*)p_ptr)=p_val;\ + }\ +} + + +#define MAKE_PTRARGR(m_type,m_ret) \ +template<>\ +struct PtrToArg<m_type> {\ + _FORCE_INLINE_ static m_type convert(const void* p_ptr) {\ + return *reinterpret_cast<const m_type*>(p_ptr);\ + }\ + _FORCE_INLINE_ static void encode(m_type p_val, void* p_ptr) {\ + *((m_ret*)p_ptr)=p_val;\ + }\ +};\ +template<>\ +struct PtrToArg<const m_type&> {\ + _FORCE_INLINE_ static m_type convert(const void* p_ptr) {\ + return *reinterpret_cast<const m_type*>(p_ptr);\ + }\ + _FORCE_INLINE_ static void encode(m_type p_val, void* p_ptr) {\ + *((m_ret*)p_ptr)=p_val;\ + }\ +} + + + +MAKE_PTRARG(bool); +MAKE_PTRARGR(uint8_t,int); +MAKE_PTRARGR(int8_t,int); +MAKE_PTRARGR(uint16_t,int); +MAKE_PTRARGR(int16_t,int); +MAKE_PTRARGR(uint32_t,int); +MAKE_PTRARGR(int32_t,int); +MAKE_PTRARGR(int64_t,int); +MAKE_PTRARGR(uint64_t,int); +MAKE_PTRARG(float); +MAKE_PTRARGR(double,float); + +MAKE_PTRARG(String); +MAKE_PTRARG(Vector2); +MAKE_PTRARG(Rect2); +MAKE_PTRARG(Vector3); +MAKE_PTRARG(Matrix32); +MAKE_PTRARG(Plane); +MAKE_PTRARG(Quat); +MAKE_PTRARG(AABB); +MAKE_PTRARG(Matrix3); +MAKE_PTRARG(Transform); +MAKE_PTRARG(Color); +MAKE_PTRARG(Image); +MAKE_PTRARG(NodePath); +MAKE_PTRARG(RID); +MAKE_PTRARG(InputEvent); +MAKE_PTRARG(Dictionary); +MAKE_PTRARG(Array); +MAKE_PTRARG(ByteArray); +MAKE_PTRARG(IntArray); +MAKE_PTRARG(RealArray); +MAKE_PTRARG(StringArray); +MAKE_PTRARG(Vector2Array); +MAKE_PTRARG(Vector3Array); +MAKE_PTRARG(ColorArray); +MAKE_PTRARG(Variant); + + +//this is for Object + +template<class T> +struct PtrToArg< T* > { + + _FORCE_INLINE_ static T* convert(const void* p_ptr) { + + return const_cast<T*>(reinterpret_cast<const T*>(p_ptr)); + } + + _FORCE_INLINE_ static void encode(T* p_var, void* p_ptr) { + + *((T**)p_ptr)=p_var; + } + +}; + +template<class T> +struct PtrToArg< const T* > { + + _FORCE_INLINE_ static const T* convert(const void* p_ptr) { + + return reinterpret_cast<const T*>(p_ptr); + } + + _FORCE_INLINE_ static void encode(T* p_var, void* p_ptr) { + + *((T**)p_ptr)=p_var; + } + +}; + + +//this is for the special cases used by Variant + +#define MAKE_VECARG(m_type) \ +template<>\ +struct PtrToArg<Vector<m_type> > {\ + _FORCE_INLINE_ static Vector<m_type> convert(const void* p_ptr) {\ + const DVector<m_type> *dvs = reinterpret_cast<const DVector<m_type> *>(p_ptr);\ + Vector<m_type> ret;\ + int len = dvs->size();\ + ret.resize(len);\ + {\ + DVector<m_type>::Read r=dvs->read();\ + for(int i=0;i<len;i++) {\ + ret[i]=r[i];\ + }\ + } \ + return ret;\ + }\ + _FORCE_INLINE_ static void encode(Vector<m_type> p_vec, void* p_ptr) {\ + DVector<m_type> *dv = reinterpret_cast<DVector<m_type> *>(p_ptr);\ + int len=p_vec.size();\ + dv->resize(len);\ + {\ + DVector<m_type>::Write w=dv->write();\ + for(int i=0;i<len;i++) {\ + w[i]=p_vec[i];\ + }\ + } \ + }\ +};\ +template<>\ +struct PtrToArg<const Vector<m_type>& > {\ + _FORCE_INLINE_ static Vector<m_type> convert(const void* p_ptr) {\ + const DVector<m_type> *dvs = reinterpret_cast<const DVector<m_type> *>(p_ptr);\ + Vector<m_type> ret;\ + int len = dvs->size();\ + ret.resize(len);\ + {\ + DVector<m_type>::Read r=dvs->read();\ + for(int i=0;i<len;i++) {\ + ret[i]=r[i];\ + }\ + } \ + return ret;\ + }\ +} + +MAKE_VECARG(String); +MAKE_VECARG(uint8_t); +MAKE_VECARG(int); +MAKE_VECARG(float); +MAKE_VECARG(Vector2); +MAKE_VECARG(Vector3); +MAKE_VECARG(Color); + +//for stuff that gets converted to Array vectors +#define MAKE_VECARR(m_type) \ +template<>\ +struct PtrToArg<Vector<m_type> > {\ + _FORCE_INLINE_ static Vector<m_type> convert(const void* p_ptr) {\ + const Array *arr = reinterpret_cast<const Array *>(p_ptr);\ + Vector<m_type> ret;\ + int len = arr->size();\ + ret.resize(len);\ + for(int i=0;i<len;i++) {\ + ret[i]=(*arr)[i];\ + }\ + return ret;\ + }\ + _FORCE_INLINE_ static void encode(Vector<m_type> p_vec, void* p_ptr) {\ + Array *arr = reinterpret_cast<Array *>(p_ptr);\ + int len = p_vec.size();\ + arr->resize(len);\ + for(int i=0;i<len;i++) {\ + (*arr)[i]=p_vec[i];\ + }\ + } \ +};\ +template<>\ +struct PtrToArg<const Vector<m_type>& > {\ + _FORCE_INLINE_ static Vector<m_type> convert(const void* p_ptr) {\ + const Array *arr = reinterpret_cast<const Array *>(p_ptr);\ + Vector<m_type> ret;\ + int len = arr->size();\ + ret.resize(len);\ + for(int i=0;i<len;i++) {\ + ret[i]=(*arr)[i];\ + }\ + return ret;\ + }\ +} + + +MAKE_VECARR(Variant); +MAKE_VECARR(RID); +MAKE_VECARR(Plane); + +#define MAKE_DVECARR(m_type) \ +template<>\ +struct PtrToArg<DVector<m_type> > {\ + _FORCE_INLINE_ static DVector<m_type> convert(const void* p_ptr) {\ + const Array *arr = reinterpret_cast<const Array *>(p_ptr);\ + DVector<m_type> ret;\ + int len = arr->size();\ + ret.resize(len);\ + {\ + DVector<m_type>::Write w=ret.write();\ + for(int i=0;i<len;i++) {\ + w[i]=(*arr)[i];\ + }\ + }\ + return ret;\ + }\ + _FORCE_INLINE_ static void encode(DVector<m_type> p_vec, void* p_ptr) {\ + Array *arr = reinterpret_cast<Array *>(p_ptr);\ + int len = p_vec.size();\ + arr->resize(len);\ + {\ + DVector<m_type>::Read r=p_vec.read();\ + for(int i=0;i<len;i++) {\ + (*arr)[i]=r[i];\ + }\ + }\ + } \ +};\ +template<>\ +struct PtrToArg<const DVector<m_type>& > {\ + _FORCE_INLINE_ static DVector<m_type> convert(const void* p_ptr) {\ + const Array *arr = reinterpret_cast<const Array *>(p_ptr);\ + DVector<m_type> ret;\ + int len = arr->size();\ + ret.resize(len);\ + {\ + DVector<m_type>::Write w=ret.write();\ + for(int i=0;i<len;i++) {\ + w[i]=(*arr)[i];\ + }\ + }\ + return ret;\ + }\ +} + +MAKE_DVECARR(Plane); +//for special case StringName + +#define MAKE_STRINGCONV(m_type) \ +template<>\ +struct PtrToArg<m_type> {\ + _FORCE_INLINE_ static m_type convert(const void* p_ptr) {\ + m_type s = *reinterpret_cast<const String*>(p_ptr);\ + return s;\ + }\ + _FORCE_INLINE_ static void encode(m_type p_vec, void* p_ptr) {\ + String *arr = reinterpret_cast<String *>(p_ptr);\ + *arr=p_vec;\ + }\ +};\ +\ +template<>\ +struct PtrToArg<const m_type&> {\ + _FORCE_INLINE_ static m_type convert(const void* p_ptr) {\ + m_type s = *reinterpret_cast<const String*>(p_ptr);\ + return s;\ + }\ +} + +MAKE_STRINGCONV(StringName); +MAKE_STRINGCONV(IP_Address); + +template<> +struct PtrToArg<DVector<Face3> > { + _FORCE_INLINE_ static DVector<Face3> convert(const void* p_ptr) { + const DVector<Vector3> *dvs = reinterpret_cast<const DVector<Vector3> *>(p_ptr); + DVector<Face3> ret; + int len = dvs->size()/3; + ret.resize(len); + { + DVector<Vector3>::Read r=dvs->read(); + DVector<Face3>::Write w=ret.write(); + for(int i=0;i<len;i++) { + w[i].vertex[0]=r[i*3+0]; + w[i].vertex[1]=r[i*3+1]; + w[i].vertex[2]=r[i*3+2]; + } + } + return ret; + } + _FORCE_INLINE_ static void encode(DVector<Face3> p_vec, void* p_ptr) {\ + DVector<Vector3> *arr = reinterpret_cast<DVector<Vector3> *>(p_ptr);\ + int len = p_vec.size();\ + arr->resize(len*3);\ + {\ + DVector<Face3>::Read r=p_vec.read();\ + DVector<Vector3>::Write w=arr->write();\ + for(int i=0;i<len;i++) {\ + w[i*3+0]=r[i].vertex[0];\ + w[i*3+1]=r[i].vertex[1];\ + w[i*3+2]=r[i].vertex[2];\ + }\ + }\ + } \ +}; +template<> +struct PtrToArg<const DVector<Face3>& > { + _FORCE_INLINE_ static DVector<Face3> convert(const void* p_ptr) { + const DVector<Vector3> *dvs = reinterpret_cast<const DVector<Vector3> *>(p_ptr); + DVector<Face3> ret; + int len = dvs->size()/3; + ret.resize(len); + { + DVector<Vector3>::Read r=dvs->read(); + DVector<Face3>::Write w=ret.write(); + for(int i=0;i<len;i++) { + w[i].vertex[0]=r[i*3+0]; + w[i].vertex[1]=r[i*3+1]; + w[i].vertex[2]=r[i*3+2]; + } + } + return ret; + } +}; + + +#endif // METHOD_PTRCALL_H +#endif diff --git a/core/reference.h b/core/reference.h index 8bfbf19ab6..60a256dc99 100644 --- a/core/reference.h +++ b/core/reference.h @@ -329,6 +329,62 @@ public: WeakRef(); }; +#ifdef PTRCALL_ENABLED + +template<class T> +struct PtrToArg< Ref<T> > { + + _FORCE_INLINE_ static Ref<T> convert(const void* p_ptr) { + + return Ref<T>(reinterpret_cast<const T*>(p_ptr)); + } + + _FORCE_INLINE_ static void encode(Ref<T> p_val,const void* p_ptr) { + + *((T**)p_ptr)=p_val.ptr(); + } + +}; + + +template<class T> +struct PtrToArg< const Ref<T>& > { + + _FORCE_INLINE_ static Ref<T> convert(const void* p_ptr) { + + return Ref<T>(reinterpret_cast<const T*>(p_ptr)); + } + +}; +//this is for RefPtr + +template<> +struct PtrToArg< RefPtr > { + + _FORCE_INLINE_ static RefPtr convert(const void* p_ptr) { + + return Ref<Reference>(reinterpret_cast<const Reference*>(p_ptr)).get_ref_ptr(); + } + + _FORCE_INLINE_ static void encode(RefPtr p_val,const void* p_ptr) { + + Ref<Reference> r = p_val; + *((Reference**)p_ptr)=r.ptr(); + } + +}; + +template<> +struct PtrToArg< const RefPtr& > { + + _FORCE_INLINE_ static RefPtr convert(const void* p_ptr) { + + return Ref<Reference>(reinterpret_cast<const Reference*>(p_ptr)).get_ref_ptr(); + } + +}; + +#endif #endif // REFERENCE_H diff --git a/core/ustring.cpp b/core/ustring.cpp index ea9a9d903e..3c22de35f1 100644 --- a/core/ustring.cpp +++ b/core/ustring.cpp @@ -257,13 +257,10 @@ bool String::operator==(const StrRange &p_range) const { return true; const CharType *c_str=p_range.c_str; - - int l=length(); - - const CharType *dst = p_range.c_str; + const CharType *dst = &operator[](0); /* Compare char by char */ - for (int i=0;i<l;i++) { + for (int i=0;i<len;i++) { if (c_str[i]!=dst[i]) return false; @@ -2419,6 +2416,23 @@ Vector<uint8_t> String::md5_buffer() const { return ret; }; +Vector<uint8_t> String::sha256_buffer() const { + CharString cs = utf8(); + unsigned char hash[32]; + sha256_context ctx; + sha256_init(&ctx); + sha256_hash(&ctx, (unsigned char*)cs.ptr(), cs.length()); + sha256_done(&ctx, hash); + + Vector<uint8_t> ret; + ret.resize(32); + for (int i = 0; i < 32; i++) { + ret[i] = hash[i]; + } + + return ret; +} + String String::insert(int p_at_pos,String p_string) const { diff --git a/core/ustring.h b/core/ustring.h index 692cb4e37d..bb57b11d88 100644 --- a/core/ustring.h +++ b/core/ustring.h @@ -196,6 +196,7 @@ public: String md5_text() const; String sha256_text() const; Vector<uint8_t> md5_buffer() const; + Vector<uint8_t> sha256_buffer() const; inline bool empty() const { return length() == 0; } diff --git a/core/variant_call.cpp b/core/variant_call.cpp index 84015d2b04..c0f8930eed 100644 --- a/core/variant_call.cpp +++ b/core/variant_call.cpp @@ -271,6 +271,7 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM0R(String,md5_text); VCALL_LOCALMEM0R(String,sha256_text); VCALL_LOCALMEM0R(String,md5_buffer); + VCALL_LOCALMEM0R(String,sha256_buffer); VCALL_LOCALMEM0R(String,empty); VCALL_LOCALMEM0R(String,is_abs_path); VCALL_LOCALMEM0R(String,is_rel_path); @@ -511,6 +512,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM1R(ByteArray,get); VCALL_LOCALMEM1(ByteArray,push_back); VCALL_LOCALMEM1(ByteArray,resize); + VCALL_LOCALMEM2R(ByteArray,insert); + VCALL_LOCALMEM1(ByteArray,remove); VCALL_LOCALMEM1(ByteArray,append); VCALL_LOCALMEM1(ByteArray,append_array); @@ -519,6 +522,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM1R(IntArray,get); VCALL_LOCALMEM1(IntArray,push_back); VCALL_LOCALMEM1(IntArray,resize); + VCALL_LOCALMEM2R(IntArray,insert); + VCALL_LOCALMEM1(IntArray,remove); VCALL_LOCALMEM1(IntArray,append); VCALL_LOCALMEM1(IntArray,append_array); @@ -527,6 +532,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM1R(RealArray,get); VCALL_LOCALMEM1(RealArray,push_back); VCALL_LOCALMEM1(RealArray,resize); + VCALL_LOCALMEM2R(RealArray,insert); + VCALL_LOCALMEM1(RealArray,remove); VCALL_LOCALMEM1(RealArray,append); VCALL_LOCALMEM1(RealArray,append_array); @@ -535,6 +542,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM1R(StringArray,get); VCALL_LOCALMEM1(StringArray,push_back); VCALL_LOCALMEM1(StringArray,resize); + VCALL_LOCALMEM2R(StringArray,insert); + VCALL_LOCALMEM1(StringArray,remove); VCALL_LOCALMEM1(StringArray,append); VCALL_LOCALMEM1(StringArray,append_array); @@ -543,6 +552,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM1R(Vector2Array,get); VCALL_LOCALMEM1(Vector2Array,push_back); VCALL_LOCALMEM1(Vector2Array,resize); + VCALL_LOCALMEM2R(Vector2Array,insert); + VCALL_LOCALMEM1(Vector2Array,remove); VCALL_LOCALMEM1(Vector2Array,append); VCALL_LOCALMEM1(Vector2Array,append_array); @@ -551,6 +562,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM1R(Vector3Array,get); VCALL_LOCALMEM1(Vector3Array,push_back); VCALL_LOCALMEM1(Vector3Array,resize); + VCALL_LOCALMEM2R(Vector3Array,insert); + VCALL_LOCALMEM1(Vector3Array,remove); VCALL_LOCALMEM1(Vector3Array,append); VCALL_LOCALMEM1(Vector3Array,append_array); @@ -559,6 +572,8 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var VCALL_LOCALMEM1R(ColorArray,get); VCALL_LOCALMEM1(ColorArray,push_back); VCALL_LOCALMEM1(ColorArray,resize); + VCALL_LOCALMEM2R(ColorArray,insert); + VCALL_LOCALMEM1(ColorArray,remove); VCALL_LOCALMEM1(ColorArray,append); VCALL_LOCALMEM1(ColorArray,append_array); @@ -1308,6 +1323,7 @@ _VariantCall::addfunc(Variant::m_vtype,Variant::m_ret,_SCS(#m_method),VCALL(m_cl ADDFUNC0(STRING,STRING,String,md5_text,varray()); ADDFUNC0(STRING,STRING,String,sha256_text,varray()); ADDFUNC0(STRING,RAW_ARRAY,String,md5_buffer,varray()); + ADDFUNC0(STRING,RAW_ARRAY,String,sha256_buffer,varray()); ADDFUNC0(STRING,BOOL,String,empty,varray()); ADDFUNC0(STRING,BOOL,String,is_abs_path,varray()); ADDFUNC0(STRING,BOOL,String,is_rel_path,varray()); @@ -1484,8 +1500,11 @@ _VariantCall::addfunc(Variant::m_vtype,Variant::m_ret,_SCS(#m_method),VCALL(m_cl ADDFUNC0(RAW_ARRAY,INT,ByteArray,size,varray()); ADDFUNC2(RAW_ARRAY,NIL,ByteArray,set,INT,"idx",INT,"byte",varray()); - //ADDFUNC1(RAW_ARRAY,INT,ByteArray,get,INT,"idx",varray()); ADDFUNC1(RAW_ARRAY,NIL,ByteArray,push_back,INT,"byte",varray()); + ADDFUNC1(RAW_ARRAY,NIL,ByteArray,append,INT,"byte",varray()); + ADDFUNC1(RAW_ARRAY,NIL,ByteArray,append_array,RAW_ARRAY,"array",varray()); + ADDFUNC1(RAW_ARRAY,NIL,ByteArray,remove,INT,"idx",varray()); + ADDFUNC2(RAW_ARRAY,INT,ByteArray,insert,INT,"idx",INT,"byte",varray()); ADDFUNC1(RAW_ARRAY,NIL,ByteArray,resize,INT,"idx",varray()); ADDFUNC0(RAW_ARRAY,STRING,ByteArray,get_string_from_ascii,varray()); @@ -1494,38 +1513,56 @@ _VariantCall::addfunc(Variant::m_vtype,Variant::m_ret,_SCS(#m_method),VCALL(m_cl ADDFUNC0(INT_ARRAY,INT,IntArray,size,varray()); ADDFUNC2(INT_ARRAY,NIL,IntArray,set,INT,"idx",INT,"integer",varray()); - //ADDFUNC1(INT_ARRAY,INT,IntArray,get,INT,"idx",varray()); ADDFUNC1(INT_ARRAY,NIL,IntArray,push_back,INT,"integer",varray()); + ADDFUNC1(INT_ARRAY,NIL,IntArray,append,INT,"integer",varray()); + ADDFUNC1(INT_ARRAY,NIL,IntArray,append_array,INT_ARRAY,"array",varray()); + ADDFUNC1(INT_ARRAY,NIL,IntArray,remove,INT,"idx",varray()); + ADDFUNC2(INT_ARRAY,INT,IntArray,insert,INT,"idx",INT,"integer",varray()); ADDFUNC1(INT_ARRAY,NIL,IntArray,resize,INT,"idx",varray()); ADDFUNC0(REAL_ARRAY,INT,RealArray,size,varray()); ADDFUNC2(REAL_ARRAY,NIL,RealArray,set,INT,"idx",REAL,"value",varray()); - //ADDFUNC1(REAL_ARRAY,REAL,RealArray,get,INT,"idx",varray()); ADDFUNC1(REAL_ARRAY,NIL,RealArray,push_back,REAL,"value",varray()); + ADDFUNC1(REAL_ARRAY,NIL,RealArray,append,REAL,"value",varray()); + ADDFUNC1(REAL_ARRAY,NIL,RealArray,append_array,REAL_ARRAY,"array",varray()); + ADDFUNC1(REAL_ARRAY,NIL,RealArray,remove,INT,"idx",varray()); + ADDFUNC2(REAL_ARRAY,INT,RealArray,insert,INT,"idx",REAL,"value",varray()); ADDFUNC1(REAL_ARRAY,NIL,RealArray,resize,INT,"idx",varray()); ADDFUNC0(STRING_ARRAY,INT,StringArray,size,varray()); ADDFUNC2(STRING_ARRAY,NIL,StringArray,set,INT,"idx",STRING,"string",varray()); - //ADDFUNC1(STRING_ARRAY,STRING,StringArray,get,INT,"idx",varray()); ADDFUNC1(STRING_ARRAY,NIL,StringArray,push_back,STRING,"string",varray()); + ADDFUNC1(STRING_ARRAY,NIL,StringArray,append,STRING,"string",varray()); + ADDFUNC1(STRING_ARRAY,NIL,StringArray,append_array,STRING_ARRAY,"array",varray()); + ADDFUNC1(STRING_ARRAY,NIL,StringArray,remove,INT,"idx",varray()); + ADDFUNC2(STRING_ARRAY,INT,StringArray,insert,INT,"idx",STRING,"string",varray()); ADDFUNC1(STRING_ARRAY,NIL,StringArray,resize,INT,"idx",varray()); ADDFUNC0(VECTOR2_ARRAY,INT,Vector2Array,size,varray()); ADDFUNC2(VECTOR2_ARRAY,NIL,Vector2Array,set,INT,"idx",VECTOR2,"vector2",varray()); - //ADDFUNC1(VECTOR2_ARRAY,VECTOR2,Vector2Array,get,INT,"idx",varray()); ADDFUNC1(VECTOR2_ARRAY,NIL,Vector2Array,push_back,VECTOR2,"vector2",varray()); + ADDFUNC1(VECTOR2_ARRAY,NIL,Vector2Array,append,VECTOR2,"vector2",varray()); + ADDFUNC1(VECTOR2_ARRAY,NIL,Vector2Array,append_array,VECTOR2_ARRAY,"array",varray()); + ADDFUNC1(VECTOR2_ARRAY,NIL,Vector2Array,remove,INT,"idx",varray()); + ADDFUNC2(VECTOR2_ARRAY,INT,Vector2Array,insert,INT,"idx",VECTOR2,"vector2",varray()); ADDFUNC1(VECTOR2_ARRAY,NIL,Vector2Array,resize,INT,"idx",varray()); ADDFUNC0(VECTOR3_ARRAY,INT,Vector3Array,size,varray()); ADDFUNC2(VECTOR3_ARRAY,NIL,Vector3Array,set,INT,"idx",VECTOR3,"vector3",varray()); - //ADDFUNC1(VECTOR3_ARRAY,VECTOR3,Vector3Array,get,INT,"idx",varray()); ADDFUNC1(VECTOR3_ARRAY,NIL,Vector3Array,push_back,VECTOR3,"vector3",varray()); + ADDFUNC1(VECTOR3_ARRAY,NIL,Vector3Array,append,VECTOR3,"vector3",varray()); + ADDFUNC1(VECTOR3_ARRAY,NIL,Vector3Array,append_array,VECTOR3_ARRAY,"array",varray()); + ADDFUNC1(VECTOR3_ARRAY,NIL,Vector3Array,remove,INT,"idx",varray()); + ADDFUNC2(VECTOR3_ARRAY,INT,Vector3Array,insert,INT,"idx",VECTOR3,"vector3",varray()); ADDFUNC1(VECTOR3_ARRAY,NIL,Vector3Array,resize,INT,"idx",varray()); ADDFUNC0(COLOR_ARRAY,INT,ColorArray,size,varray()); ADDFUNC2(COLOR_ARRAY,NIL,ColorArray,set,INT,"idx",COLOR,"color",varray()); - //ADDFUNC1(COLOR_ARRAY,COLOR,ColorArray,get,INT,"idx",varray()); ADDFUNC1(COLOR_ARRAY,NIL,ColorArray,push_back,COLOR,"color",varray()); + ADDFUNC1(COLOR_ARRAY,NIL,ColorArray,append,COLOR,"color",varray()); + ADDFUNC1(COLOR_ARRAY,NIL,ColorArray,append_array,COLOR_ARRAY,"array",varray()); + ADDFUNC1(COLOR_ARRAY,NIL,ColorArray,remove,INT,"idx",varray()); + ADDFUNC2(COLOR_ARRAY,INT,ColorArray,insert,INT,"idx",COLOR,"color",varray()); ADDFUNC1(COLOR_ARRAY,NIL,ColorArray,resize,INT,"idx",varray()); //pointerbased diff --git a/core/variant_op.cpp b/core/variant_op.cpp index 9f706e75cf..e549161de9 100644 --- a/core/variant_op.cpp +++ b/core/variant_op.cpp @@ -477,7 +477,7 @@ void Variant::evaluate(const Operator& p_op, const Variant& p_a, const Variant& DEFAULT_OP_FAIL(MATRIX32); DEFAULT_OP_LOCALMEM(+,VECTOR3,Vector3); DEFAULT_OP_FAIL(PLANE); - DEFAULT_OP_FAIL(QUAT); + DEFAULT_OP_LOCALMEM(+, QUAT, Quat); DEFAULT_OP_FAIL(_AABB); DEFAULT_OP_FAIL(MATRIX3); DEFAULT_OP_FAIL(TRANSFORM); @@ -535,7 +535,7 @@ void Variant::evaluate(const Operator& p_op, const Variant& p_a, const Variant& DEFAULT_OP_FAIL(MATRIX32); DEFAULT_OP_LOCALMEM(-,VECTOR3,Vector3); DEFAULT_OP_FAIL(PLANE); - DEFAULT_OP_FAIL(QUAT); + DEFAULT_OP_LOCALMEM(-, QUAT, Quat); DEFAULT_OP_FAIL(_AABB); DEFAULT_OP_FAIL(MATRIX3); DEFAULT_OP_FAIL(TRANSFORM); @@ -597,6 +597,9 @@ void Variant::evaluate(const Operator& p_op, const Variant& p_a, const Variant& _RETURN( *reinterpret_cast<const Quat*>(p_a._data._mem) * *reinterpret_cast<const Quat*>(p_b._data._mem) ); } break; + case REAL: { + _RETURN( *reinterpret_cast<const Quat*>(p_a._data._mem) * p_b._data._real); + } break; }; r_valid=false; return; @@ -699,7 +702,13 @@ void Variant::evaluate(const Operator& p_op, const Variant& p_a, const Variant& DEFAULT_OP_FAIL(MATRIX32); DEFAULT_OP_LOCALMEM_NUM(/,VECTOR3,Vector3); DEFAULT_OP_FAIL(PLANE); - DEFAULT_OP_FAIL(QUAT); + case QUAT: { + if (p_b.type != REAL) { + r_valid = false; + return; + } + _RETURN( *reinterpret_cast<const Quat*>(p_a._data._mem) / p_b._data._real); + } break; DEFAULT_OP_FAIL(_AABB); DEFAULT_OP_FAIL(MATRIX3); DEFAULT_OP_FAIL(TRANSFORM); diff --git a/doc/base/classes.xml b/doc/base/classes.xml index 067d73034b..09554e6a98 100644 --- a/doc/base/classes.xml +++ b/doc/base/classes.xml @@ -7059,8 +7059,11 @@ Draw a textured rectangle region at a given position, optionally modulated by a color. Transpose swaps the x and y coordinates when reading the texture. </description> </method> - <method name="edit_get" qualifiers="const"> + <method name="edit_get_state" qualifiers="const"> + <return type="Variant"> + </return> <description> + Used for editing, returns an opaque value representing the transform state. </description> </method> <method name="edit_rotate"> @@ -7080,7 +7083,7 @@ <argument index="0" name="state" type="Variant"> </argument> <description> - Used for editing, returns an opaque value representing the transform state. + Set the transform state of this CanvasItem. For [Node2D], this is an [Array] with (in order) a [Vector2] for position, a float for rotation and another [Vector2] for scale. For [Control] this is a [Rect2] with the position and size. </description> </method> <method name="get_blend_mode" qualifiers="const"> @@ -7094,6 +7097,7 @@ <return type="RID"> </return> <description> + Return the [RID] of the [World2D] canvas where this item is in. </description> </method> <method name="get_canvas_item" qualifiers="const"> @@ -7107,55 +7111,63 @@ <return type="Matrix32"> </return> <description> + Get the transform matrix of this item's canvas. </description> </method> <method name="get_global_mouse_pos" qualifiers="const"> <return type="Vector2"> </return> <description> + Get the global position of the mouse. </description> </method> <method name="get_global_transform" qualifiers="const"> <return type="Matrix32"> </return> <description> + Get the global transform matrix of this item. </description> </method> <method name="get_global_transform_with_canvas" qualifiers="const"> <return type="Matrix32"> </return> <description> + Get the global transform matrix of this item in relation to the canvas. </description> </method> <method name="get_item_and_children_rect" qualifiers="const"> <return type="Rect2"> </return> <description> + Get a [Rect2] with the boundaries of this item and its children. </description> </method> <method name="get_item_rect" qualifiers="const"> <return type="Rect2"> </return> <description> - Return a rect containing the editable contents of the item. + Return a rect containing the editable boundaries of the item. </description> </method> <method name="get_light_mask" qualifiers="const"> <return type="int"> </return> <description> + Get this item's light mask number. </description> </method> <method name="get_local_mouse_pos" qualifiers="const"> <return type="Vector2"> </return> <description> + Get the mouse position relative to this item's position. </description> </method> <method name="get_material" qualifiers="const"> <return type="CanvasItemMaterial"> </return> <description> + Get the material of this item. </description> </method> <method name="get_opacity" qualifiers="const"> @@ -7176,30 +7188,35 @@ <return type="Matrix32"> </return> <description> + Get the transform matrix of this item. </description> </method> <method name="get_use_parent_material" qualifiers="const"> <return type="bool"> </return> <description> + Get whether this item uses its parent's material. </description> </method> <method name="get_viewport_rect" qualifiers="const"> <return type="Rect2"> </return> <description> + Get the viewport's boundaries as a [Rect2]. </description> </method> <method name="get_viewport_transform" qualifiers="const"> <return type="Matrix32"> </return> <description> + Get this item's transform in relation to the viewport. </description> </method> <method name="get_world_2d" qualifiers="const"> <return type="Object"> </return> <description> + Get the [World2D] where this item is in. </description> </method> <method name="hide"> @@ -7241,13 +7258,14 @@ <argument index="0" name="event" type="InputEvent"> </argument> <description> + Takes a global input event and convert to this item's coordinate system. </description> </method> <method name="set_as_toplevel"> <argument index="0" name="enable" type="bool"> </argument> <description> - Set as toplevel. This means that it will not inherit transform from parent canvas items. + Set as top level. This means that it will not inherit transform from parent canvas items. </description> </method> <method name="set_blend_mode"> @@ -7261,25 +7279,28 @@ <argument index="0" name="enable" type="bool"> </argument> <description> - Sets whether the canvas item is drawn behind its parent. + Set whether the canvas item is drawn behind its parent. </description> </method> <method name="set_hidden"> <argument index="0" name="hidden" type="bool"> </argument> <description> + Set whether this item should be hidden or not. Note that no matter what is set here this item won't be shown if its parent or grandparents nodes are also hidden. A hidden CanvasItem make all children hidden too. </description> </method> <method name="set_light_mask"> <argument index="0" name="light_mask" type="int"> </argument> <description> + Set the ligtht mask number of this item. </description> </method> <method name="set_material"> <argument index="0" name="material" type="CanvasItemMaterial"> </argument> <description> + Set the material of this item. </description> </method> <method name="set_opacity"> @@ -7300,6 +7321,7 @@ <argument index="0" name="enable" type="bool"> </argument> <description> + Set whether or not this item should use its parent's material. </description> </method> <method name="show"> @@ -7309,7 +7331,7 @@ </method> <method name="update"> <description> - Queue the CanvasItem for update. NOTIFICATION_DRAW will be called on idle time to request redraw. + Queue the CanvasItem for update. [code]NOTIFICATION_DRAW[/code] will be called on idle time to request redraw. </description> </method> </methods> @@ -8497,6 +8519,31 @@ Create from a generic array. </description> </method> + <method name="append"> + <argument index="0" name="color" type="Color"> + </argument> + <description> + Append an element at the end of the array (alias of [method push_back]). + </description> + </method> + <method name="append_array"> + <argument index="0" name="array" type="ColorArray"> + </argument> + <description> + Append an [ColorArray] at the end of this array. + </description> + </method> + <method name="insert"> + <return type="int"> + </return> + <argument index="0" name="idx" type="int"> + </argument> + <argument index="1" name="color" type="Color"> + </argument> + <description> + Insert a new element at a given position in the array. The position must be valid, or at the end of the array (pos==size()). + </description> + </method> <method name="push_back"> <argument index="0" name="color" type="Color"> </argument> @@ -8504,6 +8551,13 @@ Append a value to the array. </description> </method> + <method name="remove"> + <argument index="0" name="idx" type="int"> + </argument> + <description> + Remove an element from the array by index. + </description> + </method> <method name="resize"> <argument index="0" name="idx" type="int"> </argument> @@ -17113,6 +17167,31 @@ Example: (content-length:12), (Content-Type:application/json; charset=UTF-8) Create from a generic array. </description> </method> + <method name="append"> + <argument index="0" name="integer" type="int"> + </argument> + <description> + Append an element at the end of the array (alias of [method push_back]). + </description> + </method> + <method name="append_array"> + <argument index="0" name="array" type="IntArray"> + </argument> + <description> + Append an [IntArray] at the end of this array. + </description> + </method> + <method name="insert"> + <return type="int"> + </return> + <argument index="0" name="idx" type="int"> + </argument> + <argument index="1" name="integer" type="int"> + </argument> + <description> + Insert a new int at a given position in the array. The position must be valid, or at the end of the array (pos==size()). + </description> + </method> <method name="push_back"> <argument index="0" name="integer" type="int"> </argument> @@ -17120,6 +17199,13 @@ Example: (content-length:12), (Content-Type:application/json; charset=UTF-8) Append a value to the array. </description> </method> + <method name="remove"> + <argument index="0" name="idx" type="int"> + </argument> + <description> + Remove an element from the array by index. + </description> + </method> <method name="resize"> <argument index="0" name="idx" type="int"> </argument> @@ -18895,6 +18981,34 @@ Example: (content-length:12), (Content-Type:application/json; charset=UTF-8) Set the cursor position inside the [LineEdit], causing it to scroll if needed. </description> </method> + <method name="cursor_set_blink_enabled"> + <argument index="0" name="enable" type="bool"> + </argument> + <description> + Set the line edit caret to blink. + </description> + </method> + <method name="cursor_get_blink_enabled" qualifiers="const"> + <return type="float"> + </return> + <description> + Gets whether the line edit caret is blinking. + </description> + </method> + <method name="cursor_set_blink_speed"> + <argument index="0" name="blink_speed" type="float"> + </argument> + <description> + Set the line edit caret blink speed. Cannot be less then or equal to 0. + </description> + </method> + <method name="cursor_get_blink_speed" qualifiers="const"> + <return type="float"> + </return> + <description> + Gets the line edit caret blink speed. + </description> + </method> <method name="set_editable"> <argument index="0" name="enabled" type="bool"> </argument> @@ -30127,6 +30241,19 @@ A similar effect may be achieved moving this node's descendants. Create from a generic array. </description> </method> + <method name="append"> + <argument index="0" name="byte" type="int"> + </argument> + <description> + </description> + </method> + <method name="append_array"> + <argument index="0" name="array" type="RawArray"> + </argument> + <description> + Append an [RawArray] at the end of this array. + </description> + </method> <method name="get_string_from_ascii"> <return type="String"> </return> @@ -30141,6 +30268,17 @@ A similar effect may be achieved moving this node's descendants. Returns a copy of the array's contents formatted as String, assuming the array is formatted as UTF-8. Slower than get_string_from_ascii(), but works for UTF-8. Usually you should prefer this function over get_string_from_ascii() to support international input. </description> </method> + <method name="insert"> + <return type="int"> + </return> + <argument index="0" name="idx" type="int"> + </argument> + <argument index="1" name="byte" type="int"> + </argument> + <description> + Insert a new element at a given position in the array. The position must be valid, or at the end of the array (pos==size()). + </description> + </method> <method name="push_back"> <argument index="0" name="byte" type="int"> </argument> @@ -30148,6 +30286,13 @@ A similar effect may be achieved moving this node's descendants. Append an element at the end of the array. </description> </method> + <method name="remove"> + <argument index="0" name="idx" type="int"> + </argument> + <description> + Remove an element from the array by index. + </description> + </method> <method name="resize"> <argument index="0" name="idx" type="int"> </argument> @@ -30487,6 +30632,31 @@ A similar effect may be achieved moving this node's descendants. Create from a generic array. </description> </method> + <method name="append"> + <argument index="0" name="value" type="float"> + </argument> + <description> + Append an element at the end of the array (alias of [method push_back]). + </description> + </method> + <method name="append_array"> + <argument index="0" name="array" type="RealArray"> + </argument> + <description> + Append an [RealArray] at the end of this array. + </description> + </method> + <method name="insert"> + <return type="int"> + </return> + <argument index="0" name="idx" type="int"> + </argument> + <argument index="1" name="value" type="float"> + </argument> + <description> + Insert a new element at a given position in the array. The position must be valid, or at the end of the array (pos==size()). + </description> + </method> <method name="push_back"> <argument index="0" name="value" type="float"> </argument> @@ -30494,6 +30664,13 @@ A similar effect may be achieved moving this node's descendants. Append an element at the end of the array. </description> </method> + <method name="remove"> + <argument index="0" name="idx" type="int"> + </argument> + <description> + Remove an element from the array by index. + </description> + </method> <method name="resize"> <argument index="0" name="idx" type="int"> </argument> @@ -37413,12 +37590,14 @@ A similar effect may be achieved moving this node's descendants. <return type="String"> </return> <description> + Return a copy of the string with special characters escaped using the C language standard. </description> </method> <method name="c_unescape"> <return type="String"> </return> <description> + Return a copy of the string with escaped characters replaced by their meanings according to the C language standard. </description> </method> <method name="capitalize"> @@ -37450,6 +37629,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="0" name="text" type="String"> </argument> <description> + Return true if the strings ends with the given string. </description> </method> <method name="erase"> @@ -37458,6 +37638,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="1" name="chars" type="int"> </argument> <description> + Erase [code]chars[/code] characters from the string starting from [code]pos[/code]. </description> </method> <method name="extension"> @@ -37557,7 +37738,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="0" name="text" type="String"> </argument> <description> - Checked whether this string is a subsequence of the given string. + Check whether this string is a subsequence of the given string. </description> </method> <method name="is_subsequence_ofi"> @@ -37566,7 +37747,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="0" name="text" type="String"> </argument> <description> - Checked whether this string is a subsequence of the given string, without considering case. + Check whether this string is a subsequence of the given string, without considering case. </description> </method> <method name="is_valid_float"> @@ -37587,6 +37768,7 @@ A similar effect may be achieved moving this node's descendants. <return type="bool"> </return> <description> + Check whether the string is a valid identifier. As is common in programming languages, a valid identifier may contain only letters, digits and underscores (_) and the first character may not be a digit. </description> </method> <method name="is_valid_integer"> @@ -37607,6 +37789,7 @@ A similar effect may be achieved moving this node's descendants. <return type="String"> </return> <description> + Return a copy of the string with special characters escaped using the JSON standard. </description> </method> <method name="left"> @@ -37647,12 +37830,14 @@ A similar effect may be achieved moving this node's descendants. <return type="RawArray"> </return> <description> + Return the MD5 hash of the string as an array of bytes. </description> </method> <method name="md5_text"> <return type="String"> </return> <description> + Return the MD5 hash of the string as a string. </description> </method> <method name="nocasecmp_to"> @@ -37670,7 +37855,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="0" name="at" type="int"> </argument> <description> - Return the character code at position "at". + Return the character code at position [code]at[/code]. </description> </method> <method name="pad_decimals"> @@ -37679,6 +37864,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="0" name="digits" type="int"> </argument> <description> + Format a number to have an exact number of [code]digits[/code] after the decimal point. </description> </method> <method name="pad_zeros"> @@ -37687,18 +37873,21 @@ A similar effect may be achieved moving this node's descendants. <argument index="0" name="digits" type="int"> </argument> <description> + Format a number to have an exact number of [code]digits[/code] before the decimal point. </description> </method> <method name="percent_decode"> <return type="String"> </return> <description> + Decode a percent-encoded string. See [method percent_encode]. </description> </method> <method name="percent_encode"> <return type="String"> </return> <description> + Percent-encode a string. This is meant to encode parameters in a URL when sending a HTTP GET request and bodies of form-urlencoded POST request. </description> </method> <method name="plus_file"> @@ -37707,6 +37896,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="0" name="file" type="String"> </argument> <description> + If the string is a path, this concatenates [code]file[/code] at the end of the string as a subpath. E.g. [code]"this/is".plus_file("path") == "this/is/path"[/code]. </description> </method> <method name="replace"> @@ -37762,10 +37952,17 @@ A similar effect may be achieved moving this node's descendants. Return the right side of the string from a given position. </description> </method> + <method name="sha256_buffer"> + <return type="RawArray"> + </return> + <description> + </description> + </method> <method name="sha256_text"> <return type="String"> </return> <description> + Return the SHA-256 hash of the string as a string. </description> </method> <method name="similarity"> @@ -37785,7 +37982,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="1" name="allow_empty" type="bool" default="True"> </argument> <description> - Split the string by a divisor string, return an array of the substrings. Example "One,Two,Three" will return \["One","Two","Three"\] if split by ",". + Split the string by a divisor string, return an array of the substrings. Example "One,Two,Three" will return ["One","Two","Three"] if split by ",". </description> </method> <method name="split_floats"> @@ -37796,7 +37993,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="1" name="allow_empty" type="bool" default="True"> </argument> <description> - Split the string in floats by using a divisor string, return an array of the substrings. Example "1,2.5,3" will return \[1,2.5,3\] if split by ",". + Split the string in floats by using a divisor string, return an array of the substrings. Example "1,2.5,3" will return [1,2.5,3] if split by ",". </description> </method> <method name="strip_edges"> @@ -37818,7 +38015,7 @@ A similar effect may be achieved moving this node's descendants. <argument index="1" name="len" type="int"> </argument> <description> - Return part of the string from "from", with length "len". + Return part of the string from the position [code]from[/code], with length [code]len[/code]. </description> </method> <method name="to_ascii"> @@ -37832,14 +38029,14 @@ A similar effect may be achieved moving this node's descendants. <return type="float"> </return> <description> - Convert a string, containing a decimal number, into a float. + Convert a string, containing a decimal number, into a [code]float[/code]. </description> </method> <method name="to_int"> <return type="int"> </return> <description> - Convert a string, containing an integer number, into an int. + Convert a string, containing an integer number, into an [code]int[/code]. </description> </method> <method name="to_lower"> @@ -37867,14 +38064,14 @@ A similar effect may be achieved moving this node's descendants. <return type="String"> </return> <description> - Perform XML escaping on the string. + Return a copy of the string with special characters escaped using the XML standard. </description> </method> <method name="xml_unescape"> <return type="String"> </return> <description> - Perform XML un-escaping of the string. + Return a copy of the string with escaped characters replaced by their meanings according to the XML standard. </description> </method> </methods> @@ -37898,6 +38095,31 @@ A similar effect may be achieved moving this node's descendants. Create from a generic array. </description> </method> + <method name="append"> + <argument index="0" name="string" type="String"> + </argument> + <description> + Append an element at the end of the array (alias of [method push_back]). + </description> + </method> + <method name="append_array"> + <argument index="0" name="array" type="StringArray"> + </argument> + <description> + Append an [StringArray] at the end of this array. + </description> + </method> + <method name="insert"> + <return type="int"> + </return> + <argument index="0" name="idx" type="int"> + </argument> + <argument index="1" name="string" type="String"> + </argument> + <description> + Insert a new element at a given position in the array. The position must be valid, or at the end of the array (pos==size()). + </description> + </method> <method name="push_back"> <argument index="0" name="string" type="String"> </argument> @@ -37905,6 +38127,13 @@ A similar effect may be achieved moving this node's descendants. Append a string element at end of the array. </description> </method> + <method name="remove"> + <argument index="0" name="idx" type="int"> + </argument> + <description> + Remove an element from the array by index. + </description> + </method> <method name="resize"> <argument index="0" name="idx" type="int"> </argument> @@ -39103,8 +39332,6 @@ A similar effect may be achieved moving this node's descendants. </theme_item> <theme_item name="completion" type="StyleBox"> </theme_item> - <theme_item name="completion_existing" type="Color"> - </theme_item> <theme_item name="completion_lines" type="int"> </theme_item> <theme_item name="completion_max_width" type="int"> @@ -39113,8 +39340,6 @@ A similar effect may be achieved moving this node's descendants. </theme_item> <theme_item name="completion_scroll_width" type="int"> </theme_item> - <theme_item name="completion_selected" type="StyleBox"> - </theme_item> <theme_item name="current_line_color" type="Color"> </theme_item> <theme_item name="focus" type="StyleBox"> @@ -42793,6 +43018,31 @@ A similar effect may be achieved moving this node's descendants. Construct a new [Vector2Array]. Optionally, you can pass in an Array that will be converted. </description> </method> + <method name="append"> + <argument index="0" name="vector2" type="Vector2"> + </argument> + <description> + Append an element at the end of the array (alias of [method push_back]). + </description> + </method> + <method name="append_array"> + <argument index="0" name="array" type="Vector2Array"> + </argument> + <description> + Append an [Vector2Array] at the end of this array. + </description> + </method> + <method name="insert"> + <return type="int"> + </return> + <argument index="0" name="idx" type="int"> + </argument> + <argument index="1" name="vector2" type="Vector2"> + </argument> + <description> + Insert a new element at a given position in the array. The position must be valid, or at the end of the array (pos==size()). + </description> + </method> <method name="push_back"> <argument index="0" name="vector2" type="Vector2"> </argument> @@ -42800,6 +43050,13 @@ A similar effect may be achieved moving this node's descendants. Insert a [Vector2] at the end. </description> </method> + <method name="remove"> + <argument index="0" name="idx" type="int"> + </argument> + <description> + Remove an element from the array by index. + </description> + </method> <method name="resize"> <argument index="0" name="idx" type="int"> </argument> @@ -43052,6 +43309,31 @@ A similar effect may be achieved moving this node's descendants. Construct a new Vector3Array. Optionally, you can pass in an Array that will be converted. </description> </method> + <method name="append"> + <argument index="0" name="vector3" type="Vector3"> + </argument> + <description> + Append an element at the end of the array (alias of [method push_back]). + </description> + </method> + <method name="append_array"> + <argument index="0" name="array" type="Vector3Array"> + </argument> + <description> + Append an [Vector3Array] at the end of this array. + </description> + </method> + <method name="insert"> + <return type="int"> + </return> + <argument index="0" name="idx" type="int"> + </argument> + <argument index="1" name="vector3" type="Vector3"> + </argument> + <description> + Insert a new element at a given position in the array. The position must be valid, or at the end of the array (pos==size()). + </description> + </method> <method name="push_back"> <argument index="0" name="vector3" type="Vector3"> </argument> @@ -43059,6 +43341,13 @@ A similar effect may be achieved moving this node's descendants. Insert a Vector3 at the end. </description> </method> + <method name="remove"> + <argument index="0" name="idx" type="int"> + </argument> + <description> + Remove an element from the array by index. + </description> + </method> <method name="resize"> <argument index="0" name="idx" type="int"> </argument> diff --git a/drivers/png/arm/arm_init.c b/drivers/png/arm/arm_init.c index 6a6a019acb..52c3f31fed 100644 --- a/drivers/png/arm/arm_init.c +++ b/drivers/png/arm/arm_init.c @@ -1,9 +1,9 @@ /* arm_init.c - NEON optimised filter functions * - * Copyright (c) 2013 Glenn Randers-Pehrson + * Copyright (c) 2014,2016 Glenn Randers-Pehrson * Written by Mans Rullgard, 2011. - * Last changed in libpng 1.6.8 [December 19, 2013] + * Last changed in libpng 1.6.22 [June 9, 2016] * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -17,134 +17,36 @@ #include "../pngpriv.h" #ifdef PNG_READ_SUPPORTED + #if PNG_ARM_NEON_OPT > 0 #ifdef PNG_ARM_NEON_CHECK_SUPPORTED /* Do run-time checks */ -#include <signal.h> /* for sig_atomic_t */ - -#ifdef __ANDROID__ -/* Linux provides access to information about CPU capabilites via - * /proc/self/auxv, however Android blocks this while still claiming to be - * Linux. The Andoid NDK, however, provides appropriate support. +/* WARNING: it is strongly recommended that you do not build libpng with + * run-time checks for CPU features if at all possible. In the case of the ARM + * NEON instructions there is no processor-specific way of detecting the + * presence of the required support, therefore run-time detection is extremely + * OS specific. * - * Documentation: http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html - */ -#include <cpu-features.h> - -static int -png_have_neon(png_structp png_ptr) -{ - /* This is a whole lot easier than the mess below, however it is probably - * implemented as below, therefore it is better to cache the result (these - * function calls may be slow!) - */ - PNG_UNUSED(png_ptr) - return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM && - (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0; -} -#elif defined(__linux__) -/* The generic __linux__ implementation requires reading /proc/self/auxv and - * looking at each element for one that records NEON capabilities. - */ -#include <unistd.h> /* for POSIX 1003.1 */ -#include <errno.h> /* for EINTR */ - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <elf.h> -#include <asm/hwcap.h> - -/* A read call may be interrupted, in which case it returns -1 and sets errno to - * EINTR if nothing was done, otherwise (if something was done) a partial read - * may result. + * You may set the macro PNG_ARM_NEON_FILE to the file name of file containing + * a fragment of C source code which defines the png_have_neon function. There + * are a number of implementations in contrib/arm-neon, but the only one that + * has partial support is contrib/arm-neon/linux.c - a generic Linux + * implementation which reads /proc/cpufino. */ -static size_t -safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes) -{ - size_t ntotal = 0; - char *buffer = png_voidcast(char*, buffer_in); - - while (nbytes > 0) - { - unsigned int nread; - int iread; - - /* Passing nread > INT_MAX to read is implementation defined in POSIX - * 1003.1, therefore despite the unsigned argument portable code must - * limit the value to INT_MAX! - */ - if (nbytes > INT_MAX) - nread = INT_MAX; - - else - nread = (unsigned int)/*SAFE*/nbytes; - - iread = read(fd, buffer, nread); - - if (iread == -1) - { - /* This is the devil in the details, a read can terminate early with 0 - * bytes read because of EINTR, yet it still returns -1 otherwise end - * of file cannot be distinguished. - */ - if (errno != EINTR) - { - png_warning(png_ptr, "/proc read failed"); - return 0; /* I.e., a permanent failure */ - } - } - - else if (iread < 0) - { - /* Not a valid 'read' result: */ - png_warning(png_ptr, "OS /proc read bug"); - return 0; - } - - else if (iread > 0) - { - /* Continue reading until a permanent failure, or EOF */ - buffer += iread; - nbytes -= (unsigned int)/*SAFE*/iread; - ntotal += (unsigned int)/*SAFE*/iread; - } - - else - return ntotal; - } - - return ntotal; /* nbytes == 0 */ -} +#ifndef PNG_ARM_NEON_FILE +# ifdef __linux__ +# define PNG_ARM_NEON_FILE "contrib/arm-neon/linux.c" +# endif +#endif -static int -png_have_neon(png_structp png_ptr) -{ - int fd = open("/proc/self/auxv", O_RDONLY); - Elf32_auxv_t aux; +#ifdef PNG_ARM_NEON_FILE - /* Failsafe: failure to open means no NEON */ - if (fd == -1) - { - png_warning(png_ptr, "/proc/self/auxv open failed"); - return 0; - } - - while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux) - { - if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0) - { - close(fd); - return 1; - } - } +#include <signal.h> /* for sig_atomic_t */ +static int png_have_neon(png_structp png_ptr); +#include PNG_ARM_NEON_FILE - close(fd); - return 0; -} -#else - /* We don't know how to do a run-time check on this system */ -# error "no support for run-time ARM NEON checks" -#endif /* OS checks */ +#else /* PNG_ARM_NEON_FILE */ +# error "PNG_ARM_NEON_FILE undefined: no support for run-time ARM NEON checks" +#endif /* PNG_ARM_NEON_FILE */ #endif /* PNG_ARM_NEON_CHECK_SUPPORTED */ #ifndef PNG_ALIGNED_MEMORY_SUPPORTED @@ -164,6 +66,7 @@ png_init_filter_functions_neon(png_structp pp, unsigned int bpp) * wrong order of the 'ON' and 'default' cases. UNSET now defaults to OFF, * as documented in png.h */ + png_debug(1, "in png_init_filter_functions_neon"); #ifdef PNG_ARM_NEON_API_SUPPORTED switch ((pp->options >> PNG_ARM_NEON) & 3) { @@ -229,4 +132,4 @@ png_init_filter_functions_neon(png_structp pp, unsigned int bpp) } } #endif /* PNG_ARM_NEON_OPT > 0 */ -#endif /* PNG_READ_SUPPORTED */ +#endif /* READ */ diff --git a/drivers/png/arm/filter_neon.S b/drivers/png/arm/filter_neon.S index 477df7c99b..3b061d6bbf 100644 --- a/drivers/png/arm/filter_neon.S +++ b/drivers/png/arm/filter_neon.S @@ -1,17 +1,17 @@ /* filter_neon.S - NEON optimised filter functions * - * Copyright (c) 2013 Glenn Randers-Pehrson + * Copyright (c) 2014 Glenn Randers-Pehrson * Written by Mans Rullgard, 2011. - * Last changed in libpng 1.5.17 [June 27, 2013] + * Last changed in libpng 1.6.16 [December 22, 2014] * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h */ -/* This is required to get the symbol renames, which are #defines, and also - * includes the definition (or not) of PNG_ARM_NEON_OPT. +/* This is required to get the symbol renames, which are #defines, and the + * definitions (or not) of PNG_ARM_NEON_OPT and PNG_ARM_NEON_IMPLEMENTATION. */ #define PNG_VERSION_INFO_ONLY #include "../pngpriv.h" @@ -20,6 +20,15 @@ .section .note.GNU-stack,"",%progbits /* mark stack as non-executable */ #endif +#ifdef PNG_READ_SUPPORTED + +/* Assembler NEON support - only works for 32-bit ARM (i.e. it does not work for + * ARM64). The code in arm/filter_neon_intrinsics.c supports ARM64, however it + * only works if -mfpu=neon is specified on the GCC command line. See pngpriv.h + * for the logic which sets PNG_USE_ARM_NEON_ASM: + */ +#if PNG_ARM_NEON_IMPLEMENTATION == 2 /* hand-coded assembler */ + #if PNG_ARM_NEON_OPT > 0 #ifdef __ELF__ @@ -38,6 +47,13 @@ ELF .size \name, . - \name .purgem endfunc .endm .text + + /* Explicitly specifying alignment here because some versions of + * GAS don't align code correctly. This is harmless in correctly + * written versions of GAS. + */ + .align 2 + .if \export .global \name .endif @@ -233,3 +249,5 @@ func png_read_filter_row_paeth3_neon, export=1 pop {r4,pc} endfunc #endif /* PNG_ARM_NEON_OPT > 0 */ +#endif /* PNG_ARM_NEON_IMPLEMENTATION == 2 (assembler) */ +#endif /* READ */ diff --git a/drivers/png/arm/filter_neon_intrinsics.c b/drivers/png/arm/filter_neon_intrinsics.c new file mode 100644 index 0000000000..be5ccc7107 --- /dev/null +++ b/drivers/png/arm/filter_neon_intrinsics.c @@ -0,0 +1,387 @@ + +/* filter_neon_intrinsics.c - NEON optimised filter functions + * + * Copyright (c) 2014,2016 Glenn Randers-Pehrson + * Written by James Yu <james.yu at linaro.org>, October 2013. + * Based on filter_neon.S, written by Mans Rullgard, 2011. + * + * Last changed in libpng 1.6.22 [June 9, 2016] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "../pngpriv.h" + +#ifdef PNG_READ_SUPPORTED + +/* This code requires -mfpu=neon on the command line: */ +#if PNG_ARM_NEON_IMPLEMENTATION == 1 /* intrinsics code from pngpriv.h */ + +#include <arm_neon.h> + +/* libpng row pointers are not necessarily aligned to any particular boundary, + * however this code will only work with appropriate alignment. arm/arm_init.c + * checks for this (and will not compile unless it is done). This code uses + * variants of png_aligncast to avoid compiler warnings. + */ +#define png_ptr(type,pointer) png_aligncast(type *,pointer) +#define png_ptrc(type,pointer) png_aligncastconst(const type *,pointer) + +/* The following relies on a variable 'temp_pointer' being declared with type + * 'type'. This is written this way just to hide the GCC strict aliasing + * warning; note that the code is safe because there never is an alias between + * the input and output pointers. + */ +#define png_ldr(type,pointer)\ + (temp_pointer = png_ptr(type,pointer), *temp_pointer) + +#if PNG_ARM_NEON_OPT > 0 + +void +png_read_filter_row_up_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + png_const_bytep pp = prev_row; + + png_debug(1, "in png_read_filter_row_up_neon"); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint8x16_t qrp, qpp; + + qrp = vld1q_u8(rp); + qpp = vld1q_u8(pp); + qrp = vaddq_u8(qrp, qpp); + vst1q_u8(rp, qrp); + } +} + +void +png_read_filter_row_sub3_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x16_t vtmp = vld1q_u8(rp); + uint8x8x2_t *vrpt = png_ptr(uint8x8x2_t, &vtmp); + uint8x8x2_t vrp = *vrpt; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_sub3_neon"); + + for (; rp < rp_stop;) + { + uint8x8_t vtmp1, vtmp2; + uint32x2_t *temp_pointer; + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); + vtmp2 = vext_u8(vrp.val[0], vrp.val[1], 6); + vdest.val[1] = vadd_u8(vdest.val[0], vtmp1); + + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + vdest.val[2] = vadd_u8(vdest.val[1], vtmp2); + vdest.val[3] = vadd_u8(vdest.val[2], vtmp1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t, &vtmp); + vrp = *vrpt; + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } + + PNG_UNUSED(prev_row) +} + +void +png_read_filter_row_sub4_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_sub4_neon"); + + for (; rp < rp_stop; rp += 16) + { + uint32x2x4_t vtmp = vld4_u32(png_ptr(uint32_t,rp)); + uint8x8x4_t *vrpt = png_ptr(uint8x8x4_t,&vtmp); + uint8x8x4_t vrp = *vrpt; + uint32x2x4_t *temp_pointer; + + vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[0], vrp.val[1]); + vdest.val[2] = vadd_u8(vdest.val[1], vrp.val[2]); + vdest.val[3] = vadd_u8(vdest.val[2], vrp.val[3]); + vst4_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2x4_t,&vdest), 0); + } + + PNG_UNUSED(prev_row) +} + +void +png_read_filter_row_avg3_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_const_bytep pp = prev_row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x16_t vtmp; + uint8x8x2_t *vrpt; + uint8x8x2_t vrp; + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + vtmp = vld1q_u8(rp); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + png_debug(1, "in png_read_filter_row_avg3_neon"); + + for (; rp < rp_stop; pp += 12) + { + uint8x8_t vtmp1, vtmp2, vtmp3; + + uint8x8x2_t *vppt; + uint8x8x2_t vpp; + + uint32x2_t *temp_pointer; + + vtmp = vld1q_u8(pp); + vppt = png_ptr(uint8x8x2_t,&vtmp); + vpp = *vppt; + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); + vtmp3 = vext_u8(vrp.val[0], vrp.val[1], 6); + vdest.val[1] = vhadd_u8(vdest.val[0], vtmp2); + vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); + + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 6); + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + vdest.val[2] = vhadd_u8(vdest.val[1], vtmp2); + vdest.val[2] = vadd_u8(vdest.val[2], vtmp3); + + vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); + + vdest.val[3] = vhadd_u8(vdest.val[2], vtmp2); + vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } +} + +void +png_read_filter_row_avg4_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + png_const_bytep pp = prev_row; + + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_avg4_neon"); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint32x2x4_t vtmp; + uint8x8x4_t *vrpt, *vppt; + uint8x8x4_t vrp, vpp; + uint32x2x4_t *temp_pointer; + + vtmp = vld4_u32(png_ptr(uint32_t,rp)); + vrpt = png_ptr(uint8x8x4_t,&vtmp); + vrp = *vrpt; + vtmp = vld4_u32(png_ptrc(uint32_t,pp)); + vppt = png_ptr(uint8x8x4_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + vdest.val[1] = vhadd_u8(vdest.val[0], vpp.val[1]); + vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); + vdest.val[2] = vhadd_u8(vdest.val[1], vpp.val[2]); + vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); + vdest.val[3] = vhadd_u8(vdest.val[2], vpp.val[3]); + vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); + + vst4_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2x4_t,&vdest), 0); + } +} + +static uint8x8_t +paeth(uint8x8_t a, uint8x8_t b, uint8x8_t c) +{ + uint8x8_t d, e; + uint16x8_t p1, pa, pb, pc; + + p1 = vaddl_u8(a, b); /* a + b */ + pc = vaddl_u8(c, c); /* c * 2 */ + pa = vabdl_u8(b, c); /* pa */ + pb = vabdl_u8(a, c); /* pb */ + pc = vabdq_u16(p1, pc); /* pc */ + + p1 = vcleq_u16(pa, pb); /* pa <= pb */ + pa = vcleq_u16(pa, pc); /* pa <= pc */ + pb = vcleq_u16(pb, pc); /* pb <= pc */ + + p1 = vandq_u16(p1, pa); /* pa <= pb && pa <= pc */ + + d = vmovn_u16(pb); + e = vmovn_u16(p1); + + d = vbsl_u8(d, b, c); + e = vbsl_u8(e, a, d); + + return e; +} + +void +png_read_filter_row_paeth3_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_const_bytep pp = prev_row; + png_bytep rp_stop = row + row_info->rowbytes; + + uint8x16_t vtmp; + uint8x8x2_t *vrpt; + uint8x8x2_t vrp; + uint8x8_t vlast = vdup_n_u8(0); + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + vtmp = vld1q_u8(rp); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + png_debug(1, "in png_read_filter_row_paeth3_neon"); + + for (; rp < rp_stop; pp += 12) + { + uint8x8x2_t *vppt; + uint8x8x2_t vpp; + uint8x8_t vtmp1, vtmp2, vtmp3; + uint32x2_t *temp_pointer; + + vtmp = vld1q_u8(pp); + vppt = png_ptr(uint8x8x2_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); + vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); + vdest.val[1] = paeth(vdest.val[0], vtmp2, vpp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); + + vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 6); + vtmp3 = vext_u8(vpp.val[0], vpp.val[1], 6); + vdest.val[2] = paeth(vdest.val[1], vtmp3, vtmp2); + vdest.val[2] = vadd_u8(vdest.val[2], vtmp1); + + vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); + vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); + + vtmp = vld1q_u8(rp + 12); + vrpt = png_ptr(uint8x8x2_t,&vtmp); + vrp = *vrpt; + + vdest.val[3] = paeth(vdest.val[2], vtmp2, vtmp3); + vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); + + vlast = vtmp2; + + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); + rp += 3; + vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); + rp += 3; + } +} + +void +png_read_filter_row_paeth4_neon(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp = row; + png_bytep rp_stop = row + row_info->rowbytes; + png_const_bytep pp = prev_row; + + uint8x8_t vlast = vdup_n_u8(0); + uint8x8x4_t vdest; + vdest.val[3] = vdup_n_u8(0); + + png_debug(1, "in png_read_filter_row_paeth4_neon"); + + for (; rp < rp_stop; rp += 16, pp += 16) + { + uint32x2x4_t vtmp; + uint8x8x4_t *vrpt, *vppt; + uint8x8x4_t vrp, vpp; + uint32x2x4_t *temp_pointer; + + vtmp = vld4_u32(png_ptr(uint32_t,rp)); + vrpt = png_ptr(uint8x8x4_t,&vtmp); + vrp = *vrpt; + vtmp = vld4_u32(png_ptrc(uint32_t,pp)); + vppt = png_ptr(uint8x8x4_t,&vtmp); + vpp = *vppt; + + vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); + vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); + vdest.val[1] = paeth(vdest.val[0], vpp.val[1], vpp.val[0]); + vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); + vdest.val[2] = paeth(vdest.val[1], vpp.val[2], vpp.val[1]); + vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); + vdest.val[3] = paeth(vdest.val[2], vpp.val[3], vpp.val[2]); + vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); + + vlast = vpp.val[3]; + + vst4_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2x4_t,&vdest), 0); + } +} + +#endif /* PNG_ARM_NEON_OPT > 0 */ +#endif /* PNG_ARM_NEON_IMPLEMENTATION == 1 (intrinsics) */ +#endif /* READ */ diff --git a/drivers/png/image_loader_png.cpp b/drivers/png/image_loader_png.cpp index 50b26d601a..e10ac7493f 100644 --- a/drivers/png/image_loader_png.cpp +++ b/drivers/png/image_loader_png.cpp @@ -30,7 +30,7 @@ #include "print_string.h" #include "os/os.h" - +#include <string.h> void ImageLoaderPNG::_read_png_data(png_structp png_ptr,png_bytep data, png_size_t p_length) { @@ -62,7 +62,7 @@ static void _png_error_function(png_structp, png_const_charp text) { static void _png_warn_function(png_structp, png_const_charp text) { - ERR_PRINT(text); + WARN_PRINT(text); } typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp)); @@ -104,7 +104,6 @@ Error ImageLoaderPNG::_load_image(void *rf_up,png_rw_ptr p_func,Image *p_image) png_read_info(png, info); png_get_IHDR(png, info, &width, &height, &depth, &color, NULL, NULL, NULL); - png_textp t; //https://svn.gov.pt/projects/ccidadao/repository/middleware-offline/trunk/_src/eidmw/FreeImagePTEiD/Source/FreeImage/PluginPNG.cpp //png_get_text(png,info,) /* @@ -254,7 +253,7 @@ Error ImageLoaderPNG::load_image(Image *p_image,FileAccess *f) { } void ImageLoaderPNG::get_recognized_extensions(List<String> *p_extensions) const { - + p_extensions->push_back("png"); } @@ -362,7 +361,6 @@ static DVector<uint8_t> _lossless_pack_png(const Image& p_image) { } int pngf=0; - int pngb=8; int cs=0; switch(img.get_format()) { @@ -451,7 +449,3 @@ ImageLoaderPNG::ImageLoaderPNG() { } - - - - diff --git a/drivers/png/png.c b/drivers/png/png.c index 711b7c4629..1720ca0eae 100644 --- a/drivers/png/png.c +++ b/drivers/png/png.c @@ -1,7 +1,7 @@ /* png.c - location for general purpose libpng functions * - * Last changed in libpng 1.5.23 [July 23, 2015] + * Last changed in libpng 1.6.19 [November 12, 2015] * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) @@ -14,7 +14,7 @@ #include "pngpriv.h" /* Generate a compiler error if there is an old png.h in the search path. */ -typedef png_libpng_version_1_5_27 Your_png_h_is_not_version_1_5_27; +typedef png_libpng_version_1_6_23 Your_png_h_is_not_version_1_6_23; /* Tells libpng that we have already handled the first "num_bytes" bytes * of the PNG file signature. If the PNG data is embedded into another @@ -24,7 +24,7 @@ typedef png_libpng_version_1_5_27 Your_png_h_is_not_version_1_5_27; #ifdef PNG_READ_SUPPORTED void PNGAPI -png_set_sig_bytes(png_structp png_ptr, int num_bytes) +png_set_sig_bytes(png_structrp png_ptr, int num_bytes) { unsigned int nb = (unsigned int)num_bytes; @@ -67,55 +67,46 @@ png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check) if (start + num_to_check > 8) num_to_check = 8 - start; - return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); + return ((int)(memcmp(&sig[start], &png_signature[start], num_to_check))); } -#endif /* PNG_READ_SUPPORTED */ +#endif /* READ */ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) /* Function to allocate memory for zlib */ PNG_FUNCTION(voidpf /* PRIVATE */, png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED) { - png_voidp ptr; - png_structp p; - png_uint_32 save_flags; - png_alloc_size_t num_bytes; + png_alloc_size_t num_bytes = size; if (png_ptr == NULL) - return (NULL); - - p=(png_structp)png_ptr; - save_flags=p->flags; + return NULL; - if (items > PNG_UINT_32_MAX/size) + if (items >= (~(png_alloc_size_t)0)/size) { - png_warning (p, "Potential overflow in png_zalloc()"); - return (NULL); + png_warning (png_voidcast(png_structrp, png_ptr), + "Potential overflow in png_zalloc()"); + return NULL; } - num_bytes = (png_alloc_size_t)items * size; - - p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; - ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); - p->flags=save_flags; - return ((voidpf)ptr); + num_bytes *= items; + return png_malloc_warn(png_voidcast(png_structrp, png_ptr), num_bytes); } /* Function to free memory for zlib */ void /* PRIVATE */ png_zfree(voidpf png_ptr, voidpf ptr) { - png_free((png_structp)png_ptr, (png_voidp)ptr); + png_free(png_voidcast(png_const_structrp,png_ptr), ptr); } /* Reset the CRC variable to 32 bits of 1's. Care must be taken * in case CRC is > 32 bits to leave the top bits 0. */ void /* PRIVATE */ -png_reset_crc(png_structp png_ptr) +png_reset_crc(png_structrp png_ptr) { - /* The cast is safe because the crc is a 32 bit value. */ + /* The cast is safe because the crc is a 32-bit value. */ png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0); } @@ -125,11 +116,11 @@ png_reset_crc(png_structp png_ptr) * trouble of calculating it. */ void /* PRIVATE */ -png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) +png_calculate_crc(png_structrp png_ptr, png_const_bytep ptr, png_size_t length) { int need_crc = 1; - if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) + if (PNG_CHUNK_ANCILLARY(png_ptr->chunk_name) != 0) { if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) @@ -138,34 +129,35 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) else /* critical */ { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) + if ((png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) != 0) need_crc = 0; } - /* 'uLong' is defined as unsigned long, this means that on some systems it is - * a 64 bit value. crc32, however, returns 32 bits so the following cast is - * safe. 'uInt' may be no more than 16 bits, so it is necessary to perform a - * loop here. + /* 'uLong' is defined in zlib.h as unsigned long; this means that on some + * systems it is a 64-bit value. crc32, however, returns 32 bits so the + * following cast is safe. 'uInt' may be no more than 16 bits, so it is + * necessary to perform a loop here. */ - if (need_crc && length > 0) + if (need_crc != 0 && length > 0) { uLong crc = png_ptr->crc; /* Should never issue a warning */ do { - uInt safeLength = (uInt)length; + uInt safe_length = (uInt)length; #ifndef __COVERITY__ - if (safeLength == 0) - safeLength = (uInt)-1; /* evil, but safe */ + if (safe_length == 0) + safe_length = (uInt)-1; /* evil, but safe */ #endif - crc = crc32(crc, ptr, safeLength); - /* The following should never issue compiler warnings, if they do the + crc = crc32(crc, ptr, safe_length); + + /* The following should never issue compiler warnings; if they do the * target system has characteristics that will probably violate other * assumptions within the libpng code. */ - ptr += safeLength; - length -= safeLength; + ptr += safe_length; + length -= safe_length; } while (length > 0); @@ -175,10 +167,10 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) } /* Check a user supplied version number, called from both read and write - * functions that create a png_struct + * functions that create a png_struct. */ int -png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver) +png_user_version_check(png_structrp png_ptr, png_const_charp user_png_ver) { /* Libpng versions 1.0.0 and later are binary compatible if the version * string matches through the second '.'; we must recompile any @@ -231,43 +223,149 @@ png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver) return 1; } -/* Allocate the memory for an info_struct for the application. We don't - * really need the png_ptr, but it could potentially be useful in the - * future. This should be used in favour of malloc(png_sizeof(png_info)) - * and png_info_init() so that applications that want to use a shared - * libpng don't have to be recompiled if png_info changes size. +/* Generic function to create a png_struct for either read or write - this + * contains the common initialization. */ +PNG_FUNCTION(png_structp /* PRIVATE */, +png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) +{ + png_struct create_struct; +# ifdef PNG_SETJMP_SUPPORTED + jmp_buf create_jmp_buf; +# endif + + /* This temporary stack-allocated structure is used to provide a place to + * build enough context to allow the user provided memory allocator (if any) + * to be called. + */ + memset(&create_struct, 0, (sizeof create_struct)); + + /* Added at libpng-1.2.6 */ +# ifdef PNG_USER_LIMITS_SUPPORTED + create_struct.user_width_max = PNG_USER_WIDTH_MAX; + create_struct.user_height_max = PNG_USER_HEIGHT_MAX; + +# ifdef PNG_USER_CHUNK_CACHE_MAX + /* Added at libpng-1.2.43 and 1.4.0 */ + create_struct.user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; +# endif + +# ifdef PNG_USER_CHUNK_MALLOC_MAX + /* Added at libpng-1.2.43 and 1.4.1, required only for read but exists + * in png_struct regardless. + */ + create_struct.user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; +# endif +# endif + + /* The following two API calls simply set fields in png_struct, so it is safe + * to do them now even though error handling is not yet set up. + */ +# ifdef PNG_USER_MEM_SUPPORTED + png_set_mem_fn(&create_struct, mem_ptr, malloc_fn, free_fn); +# else + PNG_UNUSED(mem_ptr) + PNG_UNUSED(malloc_fn) + PNG_UNUSED(free_fn) +# endif + + /* (*error_fn) can return control to the caller after the error_ptr is set, + * this will result in a memory leak unless the error_fn does something + * extremely sophisticated. The design lacks merit but is implicit in the + * API. + */ + png_set_error_fn(&create_struct, error_ptr, error_fn, warn_fn); + +# ifdef PNG_SETJMP_SUPPORTED + if (!setjmp(create_jmp_buf)) +# endif + { +# ifdef PNG_SETJMP_SUPPORTED + /* Temporarily fake out the longjmp information until we have + * successfully completed this function. This only works if we have + * setjmp() support compiled in, but it is safe - this stuff should + * never happen. + */ + create_struct.jmp_buf_ptr = &create_jmp_buf; + create_struct.jmp_buf_size = 0; /*stack allocation*/ + create_struct.longjmp_fn = longjmp; +# endif + /* Call the general version checker (shared with read and write code): + */ + if (png_user_version_check(&create_struct, user_png_ver) != 0) + { + png_structrp png_ptr = png_voidcast(png_structrp, + png_malloc_warn(&create_struct, (sizeof *png_ptr))); + + if (png_ptr != NULL) + { + /* png_ptr->zstream holds a back-pointer to the png_struct, so + * this can only be done now: + */ + create_struct.zstream.zalloc = png_zalloc; + create_struct.zstream.zfree = png_zfree; + create_struct.zstream.opaque = png_ptr; + +# ifdef PNG_SETJMP_SUPPORTED + /* Eliminate the local error handling: */ + create_struct.jmp_buf_ptr = NULL; + create_struct.jmp_buf_size = 0; + create_struct.longjmp_fn = 0; +# endif + + *png_ptr = create_struct; + + /* This is the successful return point */ + return png_ptr; + } + } + } + + /* A longjmp because of a bug in the application storage allocator or a + * simple failure to allocate the png_struct. + */ + return NULL; +} + +/* Allocate the memory for an info_struct for the application. */ PNG_FUNCTION(png_infop,PNGAPI -png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED) +png_create_info_struct,(png_const_structrp png_ptr),PNG_ALLOCATED) { - png_infop info_ptr; + png_inforp info_ptr; png_debug(1, "in png_create_info_struct"); if (png_ptr == NULL) - return (NULL); + return NULL; + + /* Use the internal API that does not (or at least should not) error out, so + * that this call always returns ok. The application typically sets up the + * error handling *after* creating the info_struct because this is the way it + * has always been done in 'example.c'. + */ + info_ptr = png_voidcast(png_inforp, png_malloc_base(png_ptr, + (sizeof *info_ptr))); -#ifdef PNG_USER_MEM_SUPPORTED - info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, - png_ptr->malloc_fn, png_ptr->mem_ptr); -#else - info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); -#endif if (info_ptr != NULL) - png_info_init_3(&info_ptr, png_sizeof(png_info)); + memset(info_ptr, 0, (sizeof *info_ptr)); - return (info_ptr); + return info_ptr; } /* This function frees the memory associated with a single info struct. * Normally, one would use either png_destroy_read_struct() or * png_destroy_write_struct() to free an info struct, but this may be - * useful for some applications. + * useful for some applications. From libpng 1.6.0 this function is also used + * internally to implement the png_info release part of the 'struct' destroy + * APIs. This ensures that all possible approaches free the same data (all of + * it). */ void PNGAPI -png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) +png_destroy_info_struct(png_const_structrp png_ptr, png_infopp info_ptr_ptr) { - png_infop info_ptr = NULL; + png_inforp info_ptr = NULL; png_debug(1, "in png_destroy_info_struct"); @@ -279,48 +377,59 @@ png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) if (info_ptr != NULL) { - png_info_destroy(png_ptr, info_ptr); - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, - png_ptr->mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif + /* Do this first in case of an error below; if the app implements its own + * memory management this can lead to png_free calling png_error, which + * will abort this routine and return control to the app error handler. + * An infinite loop may result if it then tries to free the same info + * ptr. + */ *info_ptr_ptr = NULL; + + png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); + memset(info_ptr, 0, (sizeof *info_ptr)); + png_free(png_ptr, info_ptr); } } /* Initialize the info structure. This is now an internal function (0.89) * and applications using it are urged to use png_create_info_struct() - * instead. + * instead. Use deprecated in 1.6.0, internal use removed (used internally it + * is just a memset). + * + * NOTE: it is almost inconceivable that this API is used because it bypasses + * the user-memory mechanism and the user error handling/warning mechanisms in + * those cases where it does anything other than a memset. */ - -void PNGAPI -png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) +PNG_FUNCTION(void,PNGAPI +png_info_init_3,(png_infopp ptr_ptr, png_size_t png_info_struct_size), + PNG_DEPRECATED) { - png_infop info_ptr = *ptr_ptr; + png_inforp info_ptr = *ptr_ptr; png_debug(1, "in png_info_init_3"); if (info_ptr == NULL) return; - if (png_sizeof(png_info) > png_info_struct_size) + if ((sizeof (png_info)) > png_info_struct_size) { - png_destroy_struct(info_ptr); - info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); - *ptr_ptr = info_ptr; + *ptr_ptr = NULL; + /* The following line is why this API should not be used: */ + free(info_ptr); + info_ptr = png_voidcast(png_inforp, png_malloc_base(NULL, + (sizeof *info_ptr))); if (info_ptr == NULL) return; + *ptr_ptr = info_ptr; } /* Set everything to 0 */ - png_memset(info_ptr, 0, png_sizeof(png_info)); + memset(info_ptr, 0, (sizeof *info_ptr)); } +/* The following API is not called internally */ void PNGAPI -png_data_freer(png_structp png_ptr, png_infop info_ptr, +png_data_freer(png_const_structrp png_ptr, png_inforp info_ptr, int freer, png_uint_32 mask) { png_debug(1, "in png_data_freer"); @@ -335,12 +444,11 @@ png_data_freer(png_structp png_ptr, png_infop info_ptr, info_ptr->free_me &= ~mask; else - png_warning(png_ptr, - "Unknown freer parameter in png_data_freer"); + png_error(png_ptr, "Unknown freer parameter in png_data_freer"); } void PNGAPI -png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, +png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask, int num) { png_debug(1, "in png_free_data"); @@ -462,7 +570,7 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, } #endif -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED if (info_ptr->unknown_chunks != 0 && ((mask & PNG_FREE_UNKN) & info_ptr->free_me) != 0) { @@ -527,37 +635,14 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, info_ptr->free_me &= ~mask; } - -/* This is an internal routine to free any memory that the info struct is - * pointing to before re-using it or freeing the struct itself. Recall - * that png_free() checks for NULL pointers for us. - */ -void /* PRIVATE */ -png_info_destroy(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_info_destroy"); - - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list = NULL; - png_ptr->num_chunk_list = 0; - } -#endif - - png_info_init_3(&info_ptr, png_sizeof(png_info)); -} -#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ +#endif /* READ || WRITE */ /* This function returns a pointer to the io_ptr associated with the user * functions. The application should free any memory associated with this * pointer before png_write_destroy() or png_read_destroy() are called. */ png_voidp PNGAPI -png_get_io_ptr(png_structp png_ptr) +png_get_io_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return (NULL); @@ -574,7 +659,7 @@ png_get_io_ptr(png_structp png_ptr) * function of your own because "FILE *" isn't necessarily available. */ void PNGAPI -png_init_io(png_structp png_ptr, png_FILE_p fp) +png_init_io(png_structrp png_ptr, png_FILE_p fp) { png_debug(1, "in png_init_io"); @@ -585,42 +670,53 @@ png_init_io(png_structp png_ptr, png_FILE_p fp) } # endif +# ifdef PNG_SAVE_INT_32_SUPPORTED +/* PNG signed integers are saved in 32-bit 2's complement format. ANSI C-90 + * defines a cast of a signed integer to an unsigned integer either to preserve + * the value, if it is positive, or to calculate: + * + * (UNSIGNED_MAX+1) + integer + * + * Where UNSIGNED_MAX is the appropriate maximum unsigned value, so when the + * negative integral value is added the result will be an unsigned value + * correspnding to the 2's complement representation. + */ +void PNGAPI +png_save_int_32(png_bytep buf, png_int_32 i) +{ + png_save_uint_32(buf, i); +} +# endif + # ifdef PNG_TIME_RFC1123_SUPPORTED /* Convert the supplied time into an RFC 1123 string suitable for use in * a "Creation Time" or other text-based time string. */ -png_const_charp PNGAPI -png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) +int PNGAPI +png_convert_to_rfc1123_buffer(char out[29], png_const_timep ptime) { static PNG_CONST char short_months[12][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; - if (png_ptr == NULL) - return (NULL); + if (out == NULL) + return 0; if (ptime->year > 9999 /* RFC1123 limitation */ || ptime->month == 0 || ptime->month > 12 || ptime->day == 0 || ptime->day > 31 || ptime->hour > 23 || ptime->minute > 59 || ptime->second > 60) - { - png_warning(png_ptr, "Ignoring invalid time value"); - return (NULL); - } + return 0; { size_t pos = 0; char number_buf[5]; /* enough for a four-digit year */ -# define APPEND_STRING(string)\ - pos = png_safecat(png_ptr->time_buffer, sizeof png_ptr->time_buffer,\ - pos, (string)) +# define APPEND_STRING(string) pos = png_safecat(out, 29, pos, (string)) # define APPEND_NUMBER(format, value)\ APPEND_STRING(PNG_FORMAT_NUMBER(number_buf, format, (value))) -# define APPEND(ch)\ - if (pos < (sizeof png_ptr->time_buffer)-1)\ - png_ptr->time_buffer[pos++] = (ch) +# define APPEND(ch) if (pos < 28) out[pos++] = (ch) APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day); APPEND(' '); @@ -634,20 +730,44 @@ png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) APPEND(':'); APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second); APPEND_STRING(" +0000"); /* This reliably terminates the buffer */ + PNG_UNUSED (pos) # undef APPEND # undef APPEND_NUMBER # undef APPEND_STRING } - return png_ptr->time_buffer; + return 1; +} + +# if PNG_LIBPNG_VER < 10700 +/* To do: remove the following from libpng-1.7 */ +/* Original API that uses a private buffer in png_struct. + * Deprecated because it causes png_struct to carry a spurious temporary + * buffer (png_struct::time_buffer), better to have the caller pass this in. + */ +png_const_charp PNGAPI +png_convert_to_rfc1123(png_structrp png_ptr, png_const_timep ptime) +{ + if (png_ptr != NULL) + { + /* The only failure above if png_ptr != NULL is from an invalid ptime */ + if (png_convert_to_rfc1123_buffer(png_ptr->time_buffer, ptime) == 0) + png_warning(png_ptr, "Ignoring invalid time value"); + + else + return png_ptr->time_buffer; + } + + return NULL; } -# endif /* PNG_TIME_RFC1123_SUPPORTED */ +# endif /* LIBPNG_VER < 10700 */ +# endif /* TIME_RFC1123 */ -#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ +#endif /* READ || WRITE */ png_const_charp PNGAPI -png_get_copyright(png_const_structp png_ptr) +png_get_copyright(png_const_structrp png_ptr) { PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ #ifdef PNG_STRING_COPYRIGHT @@ -655,14 +775,14 @@ png_get_copyright(png_const_structp png_ptr) #else # ifdef __STDC__ return PNG_STRING_NEWLINE \ - "libpng version 1.5.27 - May 26, 2016" PNG_STRING_NEWLINE \ - "Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson" \ - PNG_STRING_NEWLINE \ - "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ - "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ - PNG_STRING_NEWLINE; + "libpng version 1.6.23 - June 9, 2016" PNG_STRING_NEWLINE \ + "Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson" \ + PNG_STRING_NEWLINE \ + "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ + "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ + PNG_STRING_NEWLINE; # else - return "libpng version 1.5.27 - May 26, 2016\ + return "libpng version 1.6.23 - June 9, 2016\ Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson\ Copyright (c) 1996-1997 Andreas Dilger\ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; @@ -679,14 +799,14 @@ png_get_copyright(png_const_structp png_ptr) * it is guaranteed that png.c uses the correct version of png.h. */ png_const_charp PNGAPI -png_get_libpng_ver(png_const_structp png_ptr) +png_get_libpng_ver(png_const_structrp png_ptr) { /* Version of *.c files used when building libpng */ return png_get_header_ver(png_ptr); } png_const_charp PNGAPI -png_get_header_ver(png_const_structp png_ptr) +png_get_header_ver(png_const_structrp png_ptr) { /* Version of *.h files used when building libpng */ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ @@ -694,70 +814,137 @@ png_get_header_ver(png_const_structp png_ptr) } png_const_charp PNGAPI -png_get_header_version(png_const_structp png_ptr) +png_get_header_version(png_const_structrp png_ptr) { /* Returns longer string containing both version and date */ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ #ifdef __STDC__ return PNG_HEADER_VERSION_STRING # ifndef PNG_READ_SUPPORTED - " (NO READ SUPPORT)" + " (NO READ SUPPORT)" # endif - PNG_STRING_NEWLINE; + PNG_STRING_NEWLINE; #else return PNG_HEADER_VERSION_STRING; #endif } -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +/* NOTE: this routine is not used internally! */ +/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth + * large of png_color. This lets grayscale images be treated as + * paletted. Most useful for gamma correction and simplification + * of code. This API is not used internally. + */ +void PNGAPI +png_build_grayscale_palette(int bit_depth, png_colorp palette) +{ + int num_palette; + int color_inc; + int i; + int v; + + png_debug(1, "in png_do_build_grayscale_palette"); + + if (palette == NULL) + return; + + switch (bit_depth) + { + case 1: + num_palette = 2; + color_inc = 0xff; + break; + + case 2: + num_palette = 4; + color_inc = 0x55; + break; + + case 4: + num_palette = 16; + color_inc = 0x11; + break; + + case 8: + num_palette = 256; + color_inc = 1; + break; + + default: + num_palette = 0; + color_inc = 0; + break; + } + + for (i = 0, v = 0; i < num_palette; i++, v += color_inc) + { + palette[i].red = (png_byte)(v & 0xff); + palette[i].green = (png_byte)(v & 0xff); + palette[i].blue = (png_byte)(v & 0xff); + } +} +#endif + +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED int PNGAPI -png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name) +png_handle_as_unknown(png_const_structrp png_ptr, png_const_bytep chunk_name) { /* Check chunk_name and return "keep" value if it's on the list, else 0 */ png_const_bytep p, p_end; - if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list <= 0) + if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list == 0) return PNG_HANDLE_CHUNK_AS_DEFAULT; p_end = png_ptr->chunk_list; p = p_end + png_ptr->num_chunk_list*5; /* beyond end */ /* The code is the fifth byte after each four byte string. Historically this - * code was always searched from the end of the list, so it should continue - * to do so in case there are duplicated entries. + * code was always searched from the end of the list, this is no longer + * necessary because the 'set' routine handles duplicate entries correcty. */ do /* num_chunk_list > 0, so at least one */ { p -= 5; - if (!png_memcmp(chunk_name, p, 4)) + + if (memcmp(chunk_name, p, 4) == 0) return p[4]; } while (p > p_end); + /* This means that known chunks should be processed and unknown chunks should + * be handled according to the value of png_ptr->unknown_default; this can be + * confusing because, as a result, there are two levels of defaulting for + * unknown chunks. + */ return PNG_HANDLE_CHUNK_AS_DEFAULT; } +#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) ||\ + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) int /* PRIVATE */ -png_chunk_unknown_handling(png_structp png_ptr, png_uint_32 chunk_name) +png_chunk_unknown_handling(png_const_structrp png_ptr, png_uint_32 chunk_name) { png_byte chunk_string[5]; PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name); return png_handle_as_unknown(png_ptr, chunk_string); } -#endif +#endif /* READ_UNKNOWN_CHUNKS || HANDLE_AS_UNKNOWN */ +#endif /* SET_UNKNOWN_CHUNKS */ #ifdef PNG_READ_SUPPORTED /* This function, added to libpng-1.0.6g, is untested. */ int PNGAPI -png_reset_zstream(png_structp png_ptr) +png_reset_zstream(png_structrp png_ptr) { if (png_ptr == NULL) return Z_STREAM_ERROR; + /* WARNING: this resets the window bits to the maximum! */ return (inflateReset(&png_ptr->zstream)); } -#endif /* PNG_READ_SUPPORTED */ +#endif /* READ */ /* This function was added to libpng-1.0.7 */ png_uint_32 PNGAPI @@ -767,126 +954,291 @@ png_access_version_number(void) return((png_uint_32)PNG_LIBPNG_VER); } +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) +/* Ensure that png_ptr->zstream.msg holds some appropriate error message string. + * If it doesn't 'ret' is used to set it to something appropriate, even in cases + * like Z_OK or Z_STREAM_END where the error code is apparently a success code. + */ +void /* PRIVATE */ +png_zstream_error(png_structrp png_ptr, int ret) +{ + /* Translate 'ret' into an appropriate error string, priority is given to the + * one in zstream if set. This always returns a string, even in cases like + * Z_OK or Z_STREAM_END where the error code is a success code. + */ + if (png_ptr->zstream.msg == NULL) switch (ret) + { + default: + case Z_OK: + png_ptr->zstream.msg = PNGZ_MSG_CAST("unexpected zlib return code"); + break; + + case Z_STREAM_END: + /* Normal exit */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("unexpected end of LZ stream"); + break; + case Z_NEED_DICT: + /* This means the deflate stream did not have a dictionary; this + * indicates a bogus PNG. + */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("missing LZ dictionary"); + break; + + case Z_ERRNO: + /* gz APIs only: should not happen */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("zlib IO error"); + break; + + case Z_STREAM_ERROR: + /* internal libpng error */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("bad parameters to zlib"); + break; + + case Z_DATA_ERROR: + png_ptr->zstream.msg = PNGZ_MSG_CAST("damaged LZ stream"); + break; + + case Z_MEM_ERROR: + png_ptr->zstream.msg = PNGZ_MSG_CAST("insufficient memory"); + break; + + case Z_BUF_ERROR: + /* End of input or output; not a problem if the caller is doing + * incremental read or write. + */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("truncated"); + break; + + case Z_VERSION_ERROR: + png_ptr->zstream.msg = PNGZ_MSG_CAST("unsupported zlib version"); + break; + + case PNG_UNEXPECTED_ZLIB_RETURN: + /* Compile errors here mean that zlib now uses the value co-opted in + * pngpriv.h for PNG_UNEXPECTED_ZLIB_RETURN; update the switch above + * and change pngpriv.h. Note that this message is "... return", + * whereas the default/Z_OK one is "... return code". + */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("unexpected zlib return"); + break; + } +} -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) /* png_convert_size: a PNGAPI but no longer in png.h, so deleted * at libpng 1.5.5! */ /* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ -# ifdef PNG_CHECK_cHRM_SUPPORTED - -int /* PRIVATE */ -png_check_cHRM_fixed(png_structp png_ptr, - png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, - png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, - png_fixed_point blue_x, png_fixed_point blue_y) +#ifdef PNG_GAMMA_SUPPORTED /* always set if COLORSPACE */ +static int +png_colorspace_check_gamma(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_fixed_point gAMA, int from) + /* This is called to check a new gamma value against an existing one. The + * routine returns false if the new gamma value should not be written. + * + * 'from' says where the new gamma value comes from: + * + * 0: the new gamma value is the libpng estimate for an ICC profile + * 1: the new gamma value comes from a gAMA chunk + * 2: the new gamma value comes from an sRGB chunk + */ { - int ret = 1; - unsigned long xy_hi,xy_lo,yx_hi,yx_lo; + png_fixed_point gtest; - png_debug(1, "in function png_check_cHRM_fixed"); + if ((colorspace->flags & PNG_COLORSPACE_HAVE_GAMMA) != 0 && + (png_muldiv(>est, colorspace->gamma, PNG_FP_1, gAMA) == 0 || + png_gamma_significant(gtest) != 0)) + { + /* Either this is an sRGB image, in which case the calculated gamma + * approximation should match, or this is an image with a profile and the + * value libpng calculates for the gamma of the profile does not match the + * value recorded in the file. The former, sRGB, case is an error, the + * latter is just a warning. + */ + if ((colorspace->flags & PNG_COLORSPACE_FROM_sRGB) != 0 || from == 2) + { + png_chunk_report(png_ptr, "gamma value does not match sRGB", + PNG_CHUNK_ERROR); + /* Do not overwrite an sRGB value */ + return from == 2; + } - if (png_ptr == NULL) - return 0; + else /* sRGB tag not involved */ + { + png_chunk_report(png_ptr, "gamma value does not match libpng estimate", + PNG_CHUNK_WARNING); + return from == 1; + } + } - /* (x,y,z) values are first limited to 0..100000 (PNG_FP_1), the white - * y must also be greater than 0. To test for the upper limit calculate - * (PNG_FP_1-y) - x must be <= to this for z to be >= 0 (and the expression - * cannot overflow.) At this point we know x and y are >= 0 and (x+y) is - * <= PNG_FP_1. The previous test on PNG_MAX_UINT_31 is removed because it - * pointless (and it produces compiler warnings!) + return 1; +} + +void /* PRIVATE */ +png_colorspace_set_gamma(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_fixed_point gAMA) +{ + /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't + * occur. Since the fixed point representation is asymetrical it is + * possible for 1/gamma to overflow the limit of 21474 and this means the + * gamma value must be at least 5/100000 and hence at most 20000.0. For + * safety the limits here are a little narrower. The values are 0.00016 to + * 6250.0, which are truly ridiculous gamma values (and will produce + * displays that are all black or all white.) + * + * In 1.6.0 this test replaces the ones in pngrutil.c, in the gAMA chunk + * handling code, which only required the value to be >0. */ - if (white_x < 0 || white_y <= 0 || - red_x < 0 || red_y < 0 || - green_x < 0 || green_y < 0 || - blue_x < 0 || blue_y < 0) - { - png_warning(png_ptr, - "Ignoring attempt to set negative chromaticity value"); - ret = 0; - } - /* And (x+y) must be <= PNG_FP_1 (so z is >= 0) */ - if (white_x > PNG_FP_1 - white_y) - { - png_warning(png_ptr, "Invalid cHRM white point"); - ret = 0; - } + png_const_charp errmsg; + + if (gAMA < 16 || gAMA > 625000000) + errmsg = "gamma value out of range"; + +# ifdef PNG_READ_gAMA_SUPPORTED + /* Allow the application to set the gamma value more than once */ + else if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 && + (colorspace->flags & PNG_COLORSPACE_FROM_gAMA) != 0) + errmsg = "duplicate"; +# endif - if (red_x > PNG_FP_1 - red_y) + /* Do nothing if the colorspace is already invalid */ + else if ((colorspace->flags & PNG_COLORSPACE_INVALID) != 0) + return; + + else { - png_warning(png_ptr, "Invalid cHRM red point"); - ret = 0; + if (png_colorspace_check_gamma(png_ptr, colorspace, gAMA, + 1/*from gAMA*/) != 0) + { + /* Store this gamma value. */ + colorspace->gamma = gAMA; + colorspace->flags |= + (PNG_COLORSPACE_HAVE_GAMMA | PNG_COLORSPACE_FROM_gAMA); + } + + /* At present if the check_gamma test fails the gamma of the colorspace is + * not updated however the colorspace is not invalidated. This + * corresponds to the case where the existing gamma comes from an sRGB + * chunk or profile. An error message has already been output. + */ + return; } - if (green_x > PNG_FP_1 - green_y) + /* Error exit - errmsg has been set. */ + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_chunk_report(png_ptr, errmsg, PNG_CHUNK_WRITE_ERROR); +} + +void /* PRIVATE */ +png_colorspace_sync_info(png_const_structrp png_ptr, png_inforp info_ptr) +{ + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) != 0) { - png_warning(png_ptr, "Invalid cHRM green point"); - ret = 0; + /* Everything is invalid */ + info_ptr->valid &= ~(PNG_INFO_gAMA|PNG_INFO_cHRM|PNG_INFO_sRGB| + PNG_INFO_iCCP); + +# ifdef PNG_COLORSPACE_SUPPORTED + /* Clean up the iCCP profile now if it won't be used. */ + png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, -1/*not used*/); +# else + PNG_UNUSED(png_ptr) +# endif } - if (blue_x > PNG_FP_1 - blue_y) + else { - png_warning(png_ptr, "Invalid cHRM blue point"); - ret = 0; - } +# ifdef PNG_COLORSPACE_SUPPORTED + /* Leave the INFO_iCCP flag set if the pngset.c code has already set + * it; this allows a PNG to contain a profile which matches sRGB and + * yet still have that profile retrievable by the application. + */ + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_MATCHES_sRGB) != 0) + info_ptr->valid |= PNG_INFO_sRGB; + + else + info_ptr->valid &= ~PNG_INFO_sRGB; - png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo); - png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo); + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) + info_ptr->valid |= PNG_INFO_cHRM; - if (xy_hi == yx_hi && xy_lo == yx_lo) - { - png_warning(png_ptr, - "Ignoring attempt to set cHRM RGB triangle with zero area"); - ret = 0; + else + info_ptr->valid &= ~PNG_INFO_cHRM; +# endif + + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) != 0) + info_ptr->valid |= PNG_INFO_gAMA; + + else + info_ptr->valid &= ~PNG_INFO_gAMA; } +} - return ret; +#ifdef PNG_READ_SUPPORTED +void /* PRIVATE */ +png_colorspace_sync(png_const_structrp png_ptr, png_inforp info_ptr) +{ + if (info_ptr == NULL) /* reduce code size; check here not in the caller */ + return; + + info_ptr->colorspace = png_ptr->colorspace; + png_colorspace_sync_info(png_ptr, info_ptr); } -# endif /* PNG_CHECK_cHRM_SUPPORTED */ +#endif +#endif /* GAMMA */ -#ifdef PNG_cHRM_SUPPORTED +#ifdef PNG_COLORSPACE_SUPPORTED /* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for * cHRM, as opposed to using chromaticities. These internal APIs return * non-zero on a parameter error. The X, Y and Z values are required to be * positive and less than 1.0. */ -int png_xy_from_XYZ(png_xy *xy, png_XYZ XYZ) +static int +png_xy_from_XYZ(png_xy *xy, const png_XYZ *XYZ) { png_int_32 d, dwhite, whiteX, whiteY; - d = XYZ.redX + XYZ.redY + XYZ.redZ; - if (!png_muldiv(&xy->redx, XYZ.redX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->redy, XYZ.redY, PNG_FP_1, d)) return 1; + d = XYZ->red_X + XYZ->red_Y + XYZ->red_Z; + if (png_muldiv(&xy->redx, XYZ->red_X, PNG_FP_1, d) == 0) + return 1; + if (png_muldiv(&xy->redy, XYZ->red_Y, PNG_FP_1, d) == 0) + return 1; dwhite = d; - whiteX = XYZ.redX; - whiteY = XYZ.redY; + whiteX = XYZ->red_X; + whiteY = XYZ->red_Y; - d = XYZ.greenX + XYZ.greenY + XYZ.greenZ; - if (!png_muldiv(&xy->greenx, XYZ.greenX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->greeny, XYZ.greenY, PNG_FP_1, d)) return 1; + d = XYZ->green_X + XYZ->green_Y + XYZ->green_Z; + if (png_muldiv(&xy->greenx, XYZ->green_X, PNG_FP_1, d) == 0) + return 1; + if (png_muldiv(&xy->greeny, XYZ->green_Y, PNG_FP_1, d) == 0) + return 1; dwhite += d; - whiteX += XYZ.greenX; - whiteY += XYZ.greenY; + whiteX += XYZ->green_X; + whiteY += XYZ->green_Y; - d = XYZ.blueX + XYZ.blueY + XYZ.blueZ; - if (!png_muldiv(&xy->bluex, XYZ.blueX, PNG_FP_1, d)) return 1; - if (!png_muldiv(&xy->bluey, XYZ.blueY, PNG_FP_1, d)) return 1; + d = XYZ->blue_X + XYZ->blue_Y + XYZ->blue_Z; + if (png_muldiv(&xy->bluex, XYZ->blue_X, PNG_FP_1, d) == 0) + return 1; + if (png_muldiv(&xy->bluey, XYZ->blue_Y, PNG_FP_1, d) == 0) + return 1; dwhite += d; - whiteX += XYZ.blueX; - whiteY += XYZ.blueY; + whiteX += XYZ->blue_X; + whiteY += XYZ->blue_Y; - /* The reference white is simply the same of the end-point (X,Y,Z) vectors, + /* The reference white is simply the sum of the end-point (X,Y,Z) vectors, * thus: */ - if (!png_muldiv(&xy->whitex, whiteX, PNG_FP_1, dwhite)) return 1; - if (!png_muldiv(&xy->whitey, whiteY, PNG_FP_1, dwhite)) return 1; + if (png_muldiv(&xy->whitex, whiteX, PNG_FP_1, dwhite) == 0) + return 1; + if (png_muldiv(&xy->whitey, whiteY, PNG_FP_1, dwhite) == 0) + return 1; return 0; } -int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) +static int +png_XYZ_from_xy(png_XYZ *XYZ, const png_xy *xy) { png_fixed_point red_inverse, green_inverse, blue_scale; png_fixed_point left, right, denominator; @@ -894,16 +1246,16 @@ int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) /* Check xy and, implicitly, z. Note that wide gamut color spaces typically * have end points with 0 tristimulus values (these are impossible end * points, but they are used to cover the possible colors). We check - * xy.whitey against 5, not 0, to avoid a possible integer overflow. + * xy->whitey against 5, not 0, to avoid a possible integer overflow. */ - if (xy.redx < 0 || xy.redx > PNG_FP_1) return 1; - if (xy.redy < 0 || xy.redy > PNG_FP_1-xy.redx) return 1; - if (xy.greenx < 0 || xy.greenx > PNG_FP_1) return 1; - if (xy.greeny < 0 || xy.greeny > PNG_FP_1-xy.greenx) return 1; - if (xy.bluex < 0 || xy.bluex > PNG_FP_1) return 1; - if (xy.bluey < 0 || xy.bluey > PNG_FP_1-xy.bluex) return 1; - if (xy.whitex < 0 || xy.whitex > PNG_FP_1) return 1; - if (xy.whitey < 5 || xy.whitey > PNG_FP_1-xy.whitex) return 1; + if (xy->redx < 0 || xy->redx > PNG_FP_1) return 1; + if (xy->redy < 0 || xy->redy > PNG_FP_1-xy->redx) return 1; + if (xy->greenx < 0 || xy->greenx > PNG_FP_1) return 1; + if (xy->greeny < 0 || xy->greeny > PNG_FP_1-xy->greenx) return 1; + if (xy->bluex < 0 || xy->bluex > PNG_FP_1) return 1; + if (xy->bluey < 0 || xy->bluey > PNG_FP_1-xy->bluex) return 1; + if (xy->whitex < 0 || xy->whitex > PNG_FP_1) return 1; + if (xy->whitey < 5 || xy->whitey > PNG_FP_1-xy->whitex) return 1; /* The reverse calculation is more difficult because the original tristimulus * value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8 @@ -978,7 +1330,7 @@ int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) * (1/white-y), so we can immediately see that as white-y approaches 0 the * accuracy inherent in the cHRM chunk drops off substantially. * - * libpng arithmetic: a simple invertion of the above equations + * libpng arithmetic: a simple inversion of the above equations * ------------------------------------------------------------ * * white_scale = 1/white-y @@ -1084,88 +1436,1034 @@ int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) /* By the argument, above overflow should be impossible here. The return * value of 2 indicates an internal error to the caller. */ - if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.redy - xy.bluey, 7)) return 2; - if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.redx - xy.bluex, 7)) return 2; + if (png_muldiv(&left, xy->greenx-xy->bluex, xy->redy - xy->bluey, 7) == 0) + return 2; + if (png_muldiv(&right, xy->greeny-xy->bluey, xy->redx - xy->bluex, 7) == 0) + return 2; denominator = left - right; /* Now find the red numerator. */ - if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; - if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; + if (png_muldiv(&left, xy->greenx-xy->bluex, xy->whitey-xy->bluey, 7) == 0) + return 2; + if (png_muldiv(&right, xy->greeny-xy->bluey, xy->whitex-xy->bluex, 7) == 0) + return 2; /* Overflow is possible here and it indicates an extreme set of PNG cHRM * chunk values. This calculation actually returns the reciprocal of the * scale value because this allows us to delay the multiplication of white-y * into the denominator, which tends to produce a small number. */ - if (!png_muldiv(&red_inverse, xy.whitey, denominator, left-right) || - red_inverse <= xy.whitey /* r+g+b scales = white scale */) + if (png_muldiv(&red_inverse, xy->whitey, denominator, left-right) == 0 || + red_inverse <= xy->whitey /* r+g+b scales = white scale */) return 1; /* Similarly for green_inverse: */ - if (!png_muldiv(&left, xy.redy-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; - if (!png_muldiv(&right, xy.redx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; - if (!png_muldiv(&green_inverse, xy.whitey, denominator, left-right) || - green_inverse <= xy.whitey) + if (png_muldiv(&left, xy->redy-xy->bluey, xy->whitex-xy->bluex, 7) == 0) + return 2; + if (png_muldiv(&right, xy->redx-xy->bluex, xy->whitey-xy->bluey, 7) == 0) + return 2; + if (png_muldiv(&green_inverse, xy->whitey, denominator, left-right) == 0 || + green_inverse <= xy->whitey) return 1; /* And the blue scale, the checks above guarantee this can't overflow but it * can still produce 0 for extreme cHRM values. */ - blue_scale = png_reciprocal(xy.whitey) - png_reciprocal(red_inverse) - - png_reciprocal(green_inverse); - if (blue_scale <= 0) return 1; + blue_scale = png_reciprocal(xy->whitey) - png_reciprocal(red_inverse) - + png_reciprocal(green_inverse); + if (blue_scale <= 0) + return 1; /* And fill in the png_XYZ: */ - if (!png_muldiv(&XYZ->redX, xy.redx, PNG_FP_1, red_inverse)) return 1; - if (!png_muldiv(&XYZ->redY, xy.redy, PNG_FP_1, red_inverse)) return 1; - if (!png_muldiv(&XYZ->redZ, PNG_FP_1 - xy.redx - xy.redy, PNG_FP_1, - red_inverse)) + if (png_muldiv(&XYZ->red_X, xy->redx, PNG_FP_1, red_inverse) == 0) + return 1; + if (png_muldiv(&XYZ->red_Y, xy->redy, PNG_FP_1, red_inverse) == 0) + return 1; + if (png_muldiv(&XYZ->red_Z, PNG_FP_1 - xy->redx - xy->redy, PNG_FP_1, + red_inverse) == 0) return 1; - if (!png_muldiv(&XYZ->greenX, xy.greenx, PNG_FP_1, green_inverse)) return 1; - if (!png_muldiv(&XYZ->greenY, xy.greeny, PNG_FP_1, green_inverse)) return 1; - if (!png_muldiv(&XYZ->greenZ, PNG_FP_1 - xy.greenx - xy.greeny, PNG_FP_1, - green_inverse)) + if (png_muldiv(&XYZ->green_X, xy->greenx, PNG_FP_1, green_inverse) == 0) + return 1; + if (png_muldiv(&XYZ->green_Y, xy->greeny, PNG_FP_1, green_inverse) == 0) + return 1; + if (png_muldiv(&XYZ->green_Z, PNG_FP_1 - xy->greenx - xy->greeny, PNG_FP_1, + green_inverse) == 0) return 1; - if (!png_muldiv(&XYZ->blueX, xy.bluex, blue_scale, PNG_FP_1)) return 1; - if (!png_muldiv(&XYZ->blueY, xy.bluey, blue_scale, PNG_FP_1)) return 1; - if (!png_muldiv(&XYZ->blueZ, PNG_FP_1 - xy.bluex - xy.bluey, blue_scale, - PNG_FP_1)) + if (png_muldiv(&XYZ->blue_X, xy->bluex, blue_scale, PNG_FP_1) == 0) + return 1; + if (png_muldiv(&XYZ->blue_Y, xy->bluey, blue_scale, PNG_FP_1) == 0) + return 1; + if (png_muldiv(&XYZ->blue_Z, PNG_FP_1 - xy->bluex - xy->bluey, blue_scale, + PNG_FP_1) == 0) return 1; return 0; /*success*/ } -int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy) +static int +png_XYZ_normalize(png_XYZ *XYZ) { - switch (png_XYZ_from_xy(XYZ, xy)) + png_int_32 Y; + + if (XYZ->red_Y < 0 || XYZ->green_Y < 0 || XYZ->blue_Y < 0 || + XYZ->red_X < 0 || XYZ->green_X < 0 || XYZ->blue_X < 0 || + XYZ->red_Z < 0 || XYZ->green_Z < 0 || XYZ->blue_Z < 0) + return 1; + + /* Normalize by scaling so the sum of the end-point Y values is PNG_FP_1. + * IMPLEMENTATION NOTE: ANSI requires signed overflow not to occur, therefore + * relying on addition of two positive values producing a negative one is not + * safe. + */ + Y = XYZ->red_Y; + if (0x7fffffff - Y < XYZ->green_X) + return 1; + Y += XYZ->green_Y; + if (0x7fffffff - Y < XYZ->blue_X) + return 1; + Y += XYZ->blue_Y; + + if (Y != PNG_FP_1) { - case 0: /* success */ + if (png_muldiv(&XYZ->red_X, XYZ->red_X, PNG_FP_1, Y) == 0) + return 1; + if (png_muldiv(&XYZ->red_Y, XYZ->red_Y, PNG_FP_1, Y) == 0) + return 1; + if (png_muldiv(&XYZ->red_Z, XYZ->red_Z, PNG_FP_1, Y) == 0) + return 1; + + if (png_muldiv(&XYZ->green_X, XYZ->green_X, PNG_FP_1, Y) == 0) return 1; + if (png_muldiv(&XYZ->green_Y, XYZ->green_Y, PNG_FP_1, Y) == 0) + return 1; + if (png_muldiv(&XYZ->green_Z, XYZ->green_Z, PNG_FP_1, Y) == 0) + return 1; + + if (png_muldiv(&XYZ->blue_X, XYZ->blue_X, PNG_FP_1, Y) == 0) + return 1; + if (png_muldiv(&XYZ->blue_Y, XYZ->blue_Y, PNG_FP_1, Y) == 0) + return 1; + if (png_muldiv(&XYZ->blue_Z, XYZ->blue_Z, PNG_FP_1, Y) == 0) + return 1; + } + + return 0; +} + +static int +png_colorspace_endpoints_match(const png_xy *xy1, const png_xy *xy2, int delta) +{ + /* Allow an error of +/-0.01 (absolute value) on each chromaticity */ + if (PNG_OUT_OF_RANGE(xy1->whitex, xy2->whitex,delta) || + PNG_OUT_OF_RANGE(xy1->whitey, xy2->whitey,delta) || + PNG_OUT_OF_RANGE(xy1->redx, xy2->redx, delta) || + PNG_OUT_OF_RANGE(xy1->redy, xy2->redy, delta) || + PNG_OUT_OF_RANGE(xy1->greenx, xy2->greenx,delta) || + PNG_OUT_OF_RANGE(xy1->greeny, xy2->greeny,delta) || + PNG_OUT_OF_RANGE(xy1->bluex, xy2->bluex, delta) || + PNG_OUT_OF_RANGE(xy1->bluey, xy2->bluey, delta)) + return 0; + return 1; +} + +/* Added in libpng-1.6.0, a different check for the validity of a set of cHRM + * chunk chromaticities. Earlier checks used to simply look for the overflow + * condition (where the determinant of the matrix to solve for XYZ ends up zero + * because the chromaticity values are not all distinct.) Despite this it is + * theoretically possible to produce chromaticities that are apparently valid + * but that rapidly degrade to invalid, potentially crashing, sets because of + * arithmetic inaccuracies when calculations are performed on them. The new + * check is to round-trip xy -> XYZ -> xy and then check that the result is + * within a small percentage of the original. + */ +static int +png_colorspace_check_xy(png_XYZ *XYZ, const png_xy *xy) +{ + int result; + png_xy xy_test; + + /* As a side-effect this routine also returns the XYZ endpoints. */ + result = png_XYZ_from_xy(XYZ, xy); + if (result != 0) + return result; + + result = png_xy_from_XYZ(&xy_test, XYZ); + if (result != 0) + return result; + + if (png_colorspace_endpoints_match(xy, &xy_test, + 5/*actually, the math is pretty accurate*/) != 0) + return 0; + + /* Too much slip */ + return 1; +} + +/* This is the check going the other way. The XYZ is modified to normalize it + * (another side-effect) and the xy chromaticities are returned. + */ +static int +png_colorspace_check_XYZ(png_xy *xy, png_XYZ *XYZ) +{ + int result; + png_XYZ XYZtemp; + + result = png_XYZ_normalize(XYZ); + if (result != 0) + return result; + + result = png_xy_from_XYZ(xy, XYZ); + if (result != 0) + return result; + + XYZtemp = *XYZ; + return png_colorspace_check_xy(&XYZtemp, xy); +} + +/* Used to check for an endpoint match against sRGB */ +static const png_xy sRGB_xy = /* From ITU-R BT.709-3 */ +{ + /* color x y */ + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000, + /* white */ 31270, 32900 +}; + +static int +png_colorspace_set_xy_and_XYZ(png_const_structrp png_ptr, + png_colorspacerp colorspace, const png_xy *xy, const png_XYZ *XYZ, + int preferred) +{ + if ((colorspace->flags & PNG_COLORSPACE_INVALID) != 0) + return 0; + + /* The consistency check is performed on the chromaticities; this factors out + * variations because of the normalization (or not) of the end point Y + * values. + */ + if (preferred < 2 && + (colorspace->flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) + { + /* The end points must be reasonably close to any we already have. The + * following allows an error of up to +/-.001 + */ + if (png_colorspace_endpoints_match(xy, &colorspace->end_points_xy, + 100) == 0) + { + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_benign_error(png_ptr, "inconsistent chromaticities"); + return 0; /* failed */ + } + + /* Only overwrite with preferred values */ + if (preferred == 0) + return 1; /* ok, but no change */ + } + + colorspace->end_points_xy = *xy; + colorspace->end_points_XYZ = *XYZ; + colorspace->flags |= PNG_COLORSPACE_HAVE_ENDPOINTS; + + /* The end points are normally quoted to two decimal digits, so allow +/-0.01 + * on this test. + */ + if (png_colorspace_endpoints_match(xy, &sRGB_xy, 1000) != 0) + colorspace->flags |= PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB; + + else + colorspace->flags &= PNG_COLORSPACE_CANCEL( + PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB); + + return 2; /* ok and changed */ +} + +int /* PRIVATE */ +png_colorspace_set_chromaticities(png_const_structrp png_ptr, + png_colorspacerp colorspace, const png_xy *xy, int preferred) +{ + /* We must check the end points to ensure they are reasonable - in the past + * color management systems have crashed as a result of getting bogus + * colorant values, while this isn't the fault of libpng it is the + * responsibility of libpng because PNG carries the bomb and libpng is in a + * position to protect against it. + */ + png_XYZ XYZ; + + switch (png_colorspace_check_xy(&XYZ, xy)) + { + case 0: /* success */ + return png_colorspace_set_xy_and_XYZ(png_ptr, colorspace, xy, &XYZ, + preferred); case 1: - /* The chunk may be technically valid, but we got png_fixed_point - * overflow while trying to get XYZ values out of it. This is - * entirely benign - the cHRM chunk is pretty extreme. + /* We can't invert the chromaticities so we can't produce value XYZ + * values. Likely as not a color management system will fail too. */ - png_warning(png_ptr, - "extreme cHRM chunk cannot be converted to tristimulus values"); + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_benign_error(png_ptr, "invalid chromaticities"); break; default: /* libpng is broken; this should be a warning but if it happens we * want error reports so for the moment it is an error. */ - png_error(png_ptr, "internal error in png_XYZ_from_xy"); + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_error(png_ptr, "internal error checking chromaticities"); + } + + return 0; /* failed */ +} + +int /* PRIVATE */ +png_colorspace_set_endpoints(png_const_structrp png_ptr, + png_colorspacerp colorspace, const png_XYZ *XYZ_in, int preferred) +{ + png_XYZ XYZ = *XYZ_in; + png_xy xy; + + switch (png_colorspace_check_XYZ(&xy, &XYZ)) + { + case 0: + return png_colorspace_set_xy_and_XYZ(png_ptr, colorspace, &xy, &XYZ, + preferred); + + case 1: + /* End points are invalid. */ + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_benign_error(png_ptr, "invalid end points"); break; + + default: + colorspace->flags |= PNG_COLORSPACE_INVALID; + png_error(png_ptr, "internal error checking chromaticities"); + } + + return 0; /* failed */ +} + +#if defined(PNG_sRGB_SUPPORTED) || defined(PNG_iCCP_SUPPORTED) +/* Error message generation */ +static char +png_icc_tag_char(png_uint_32 byte) +{ + byte &= 0xff; + if (byte >= 32 && byte <= 126) + return (char)byte; + else + return '?'; +} + +static void +png_icc_tag_name(char *name, png_uint_32 tag) +{ + name[0] = '\''; + name[1] = png_icc_tag_char(tag >> 24); + name[2] = png_icc_tag_char(tag >> 16); + name[3] = png_icc_tag_char(tag >> 8); + name[4] = png_icc_tag_char(tag ); + name[5] = '\''; +} + +static int +is_ICC_signature_char(png_alloc_size_t it) +{ + return it == 32 || (it >= 48 && it <= 57) || (it >= 65 && it <= 90) || + (it >= 97 && it <= 122); +} + +static int +is_ICC_signature(png_alloc_size_t it) +{ + return is_ICC_signature_char(it >> 24) /* checks all the top bits */ && + is_ICC_signature_char((it >> 16) & 0xff) && + is_ICC_signature_char((it >> 8) & 0xff) && + is_ICC_signature_char(it & 0xff); +} + +static int +png_icc_profile_error(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_alloc_size_t value, png_const_charp reason) +{ + size_t pos; + char message[196]; /* see below for calculation */ + + if (colorspace != NULL) + colorspace->flags |= PNG_COLORSPACE_INVALID; + + pos = png_safecat(message, (sizeof message), 0, "profile '"); /* 9 chars */ + pos = png_safecat(message, pos+79, pos, name); /* Truncate to 79 chars */ + pos = png_safecat(message, (sizeof message), pos, "': "); /* +2 = 90 */ + if (is_ICC_signature(value) != 0) + { + /* So 'value' is at most 4 bytes and the following cast is safe */ + png_icc_tag_name(message+pos, (png_uint_32)value); + pos += 6; /* total +8; less than the else clause */ + message[pos++] = ':'; + message[pos++] = ' '; } +# ifdef PNG_WARNINGS_SUPPORTED + else + { + char number[PNG_NUMBER_BUFFER_SIZE]; /* +24 = 114*/ + + pos = png_safecat(message, (sizeof message), pos, + png_format_number(number, number+(sizeof number), + PNG_NUMBER_FORMAT_x, value)); + pos = png_safecat(message, (sizeof message), pos, "h: "); /*+2 = 116*/ + } +# endif + /* The 'reason' is an arbitrary message, allow +79 maximum 195 */ + pos = png_safecat(message, (sizeof message), pos, reason); + PNG_UNUSED(pos) + + /* This is recoverable, but make it unconditionally an app_error on write to + * avoid writing invalid ICC profiles into PNG files (i.e., we handle them + * on read, with a warning, but on write unless the app turns off + * application errors the PNG won't be written.) + */ + png_chunk_report(png_ptr, message, + (colorspace != NULL) ? PNG_CHUNK_ERROR : PNG_CHUNK_WRITE_ERROR); - /* ERROR RETURN */ return 0; } +#endif /* sRGB || iCCP */ + +#ifdef PNG_sRGB_SUPPORTED +int /* PRIVATE */ +png_colorspace_set_sRGB(png_const_structrp png_ptr, png_colorspacerp colorspace, + int intent) +{ + /* sRGB sets known gamma, end points and (from the chunk) intent. */ + /* IMPORTANT: these are not necessarily the values found in an ICC profile + * because ICC profiles store values adapted to a D50 environment; it is + * expected that the ICC profile mediaWhitePointTag will be D50; see the + * checks and code elsewhere to understand this better. + * + * These XYZ values, which are accurate to 5dp, produce rgb to gray + * coefficients of (6968,23435,2366), which are reduced (because they add up + * to 32769 not 32768) to (6968,23434,2366). These are the values that + * libpng has traditionally used (and are the best values given the 15bit + * algorithm used by the rgb to gray code.) + */ + static const png_XYZ sRGB_XYZ = /* D65 XYZ (*not* the D50 adapted values!) */ + { + /* color X Y Z */ + /* red */ 41239, 21264, 1933, + /* green */ 35758, 71517, 11919, + /* blue */ 18048, 7219, 95053 + }; + + /* Do nothing if the colorspace is already invalidated. */ + if ((colorspace->flags & PNG_COLORSPACE_INVALID) != 0) + return 0; + + /* Check the intent, then check for existing settings. It is valid for the + * PNG file to have cHRM or gAMA chunks along with sRGB, but the values must + * be consistent with the correct values. If, however, this function is + * called below because an iCCP chunk matches sRGB then it is quite + * conceivable that an older app recorded incorrect gAMA and cHRM because of + * an incorrect calculation based on the values in the profile - this does + * *not* invalidate the profile (though it still produces an error, which can + * be ignored.) + */ + if (intent < 0 || intent >= PNG_sRGB_INTENT_LAST) + return png_icc_profile_error(png_ptr, colorspace, "sRGB", + (unsigned)intent, "invalid sRGB rendering intent"); + + if ((colorspace->flags & PNG_COLORSPACE_HAVE_INTENT) != 0 && + colorspace->rendering_intent != intent) + return png_icc_profile_error(png_ptr, colorspace, "sRGB", + (unsigned)intent, "inconsistent rendering intents"); + + if ((colorspace->flags & PNG_COLORSPACE_FROM_sRGB) != 0) + { + png_benign_error(png_ptr, "duplicate sRGB information ignored"); + return 0; + } + + /* If the standard sRGB cHRM chunk does not match the one from the PNG file + * warn but overwrite the value with the correct one. + */ + if ((colorspace->flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0 && + !png_colorspace_endpoints_match(&sRGB_xy, &colorspace->end_points_xy, + 100)) + png_chunk_report(png_ptr, "cHRM chunk does not match sRGB", + PNG_CHUNK_ERROR); + + /* This check is just done for the error reporting - the routine always + * returns true when the 'from' argument corresponds to sRGB (2). + */ + (void)png_colorspace_check_gamma(png_ptr, colorspace, PNG_GAMMA_sRGB_INVERSE, + 2/*from sRGB*/); + + /* intent: bugs in GCC force 'int' to be used as the parameter type. */ + colorspace->rendering_intent = (png_uint_16)intent; + colorspace->flags |= PNG_COLORSPACE_HAVE_INTENT; + + /* endpoints */ + colorspace->end_points_xy = sRGB_xy; + colorspace->end_points_XYZ = sRGB_XYZ; + colorspace->flags |= + (PNG_COLORSPACE_HAVE_ENDPOINTS|PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB); + + /* gamma */ + colorspace->gamma = PNG_GAMMA_sRGB_INVERSE; + colorspace->flags |= PNG_COLORSPACE_HAVE_GAMMA; + + /* Finally record that we have an sRGB profile */ + colorspace->flags |= + (PNG_COLORSPACE_MATCHES_sRGB|PNG_COLORSPACE_FROM_sRGB); + + return 1; /* set */ +} +#endif /* sRGB */ + +#ifdef PNG_iCCP_SUPPORTED +/* Encoded value of D50 as an ICC XYZNumber. From the ICC 2010 spec the value + * is XYZ(0.9642,1.0,0.8249), which scales to: + * + * (63189.8112, 65536, 54060.6464) + */ +static const png_byte D50_nCIEXYZ[12] = + { 0x00, 0x00, 0xf6, 0xd6, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0xd3, 0x2d }; + +int /* PRIVATE */ +png_icc_check_length(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length) +{ + if (profile_length < 132) + return png_icc_profile_error(png_ptr, colorspace, name, profile_length, + "too short"); + + return 1; +} + +int /* PRIVATE */ +png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length, + png_const_bytep profile/* first 132 bytes only */, int color_type) +{ + png_uint_32 temp; + + /* Length check; this cannot be ignored in this code because profile_length + * is used later to check the tag table, so even if the profile seems over + * long profile_length from the caller must be correct. The caller can fix + * this up on read or write by just passing in the profile header length. + */ + temp = png_get_uint_32(profile); + if (temp != profile_length) + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "length does not match profile"); + + temp = (png_uint_32) (*(profile+8)); + if (temp > 3 && (profile_length & 3)) + return png_icc_profile_error(png_ptr, colorspace, name, profile_length, + "invalid length"); + + temp = png_get_uint_32(profile+128); /* tag count: 12 bytes/tag */ + if (temp > 357913930 || /* (2^32-4-132)/12: maximum possible tag count */ + profile_length < 132+12*temp) /* truncated tag table */ + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "tag count too large"); + + /* The 'intent' must be valid or we can't store it, ICC limits the intent to + * 16 bits. + */ + temp = png_get_uint_32(profile+64); + if (temp >= 0xffff) /* The ICC limit */ + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "invalid rendering intent"); + + /* This is just a warning because the profile may be valid in future + * versions. + */ + if (temp >= PNG_sRGB_INTENT_LAST) + (void)png_icc_profile_error(png_ptr, NULL, name, temp, + "intent outside defined range"); + + /* At this point the tag table can't be checked because it hasn't necessarily + * been loaded; however, various header fields can be checked. These checks + * are for values permitted by the PNG spec in an ICC profile; the PNG spec + * restricts the profiles that can be passed in an iCCP chunk (they must be + * appropriate to processing PNG data!) + */ + + /* Data checks (could be skipped). These checks must be independent of the + * version number; however, the version number doesn't accomodate changes in + * the header fields (just the known tags and the interpretation of the + * data.) + */ + temp = png_get_uint_32(profile+36); /* signature 'ascp' */ + if (temp != 0x61637370) + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "invalid signature"); + + /* Currently the PCS illuminant/adopted white point (the computational + * white point) are required to be D50, + * however the profile contains a record of the illuminant so perhaps ICC + * expects to be able to change this in the future (despite the rationale in + * the introduction for using a fixed PCS adopted white.) Consequently the + * following is just a warning. + */ + if (memcmp(profile+68, D50_nCIEXYZ, 12) != 0) + (void)png_icc_profile_error(png_ptr, NULL, name, 0/*no tag value*/, + "PCS illuminant is not D50"); + + /* The PNG spec requires this: + * "If the iCCP chunk is present, the image samples conform to the colour + * space represented by the embedded ICC profile as defined by the + * International Color Consortium [ICC]. The colour space of the ICC profile + * shall be an RGB colour space for colour images (PNG colour types 2, 3, and + * 6), or a greyscale colour space for greyscale images (PNG colour types 0 + * and 4)." + * + * This checking code ensures the embedded profile (on either read or write) + * conforms to the specification requirements. Notice that an ICC 'gray' + * color-space profile contains the information to transform the monochrome + * data to XYZ or L*a*b (according to which PCS the profile uses) and this + * should be used in preference to the standard libpng K channel replication + * into R, G and B channels. + * + * Previously it was suggested that an RGB profile on grayscale data could be + * handled. However it it is clear that using an RGB profile in this context + * must be an error - there is no specification of what it means. Thus it is + * almost certainly more correct to ignore the profile. + */ + temp = png_get_uint_32(profile+16); /* data colour space field */ + switch (temp) + { + case 0x52474220: /* 'RGB ' */ + if ((color_type & PNG_COLOR_MASK_COLOR) == 0) + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "RGB color space not permitted on grayscale PNG"); + break; + + case 0x47524159: /* 'GRAY' */ + if ((color_type & PNG_COLOR_MASK_COLOR) != 0) + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "Gray color space not permitted on RGB PNG"); + break; + + default: + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "invalid ICC profile color space"); + } + + /* It is up to the application to check that the profile class matches the + * application requirements; the spec provides no guidance, but it's pretty + * weird if the profile is not scanner ('scnr'), monitor ('mntr'), printer + * ('prtr') or 'spac' (for generic color spaces). Issue a warning in these + * cases. Issue an error for device link or abstract profiles - these don't + * contain the records necessary to transform the color-space to anything + * other than the target device (and not even that for an abstract profile). + * Profiles of these classes may not be embedded in images. + */ + temp = png_get_uint_32(profile+12); /* profile/device class */ + switch (temp) + { + case 0x73636e72: /* 'scnr' */ + case 0x6d6e7472: /* 'mntr' */ + case 0x70727472: /* 'prtr' */ + case 0x73706163: /* 'spac' */ + /* All supported */ + break; + + case 0x61627374: /* 'abst' */ + /* May not be embedded in an image */ + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "invalid embedded Abstract ICC profile"); + + case 0x6c696e6b: /* 'link' */ + /* DeviceLink profiles cannot be interpreted in a non-device specific + * fashion, if an app uses the AToB0Tag in the profile the results are + * undefined unless the result is sent to the intended device, + * therefore a DeviceLink profile should not be found embedded in a + * PNG. + */ + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "unexpected DeviceLink ICC profile class"); + + case 0x6e6d636c: /* 'nmcl' */ + /* A NamedColor profile is also device specific, however it doesn't + * contain an AToB0 tag that is open to misinterpretation. Almost + * certainly it will fail the tests below. + */ + (void)png_icc_profile_error(png_ptr, NULL, name, temp, + "unexpected NamedColor ICC profile class"); + break; + + default: + /* To allow for future enhancements to the profile accept unrecognized + * profile classes with a warning, these then hit the test below on the + * tag content to ensure they are backward compatible with one of the + * understood profiles. + */ + (void)png_icc_profile_error(png_ptr, NULL, name, temp, + "unrecognized ICC profile class"); + break; + } + + /* For any profile other than a device link one the PCS must be encoded + * either in XYZ or Lab. + */ + temp = png_get_uint_32(profile+20); + switch (temp) + { + case 0x58595a20: /* 'XYZ ' */ + case 0x4c616220: /* 'Lab ' */ + break; + + default: + return png_icc_profile_error(png_ptr, colorspace, name, temp, + "unexpected ICC PCS encoding"); + } + + return 1; +} + +int /* PRIVATE */ +png_icc_check_tag_table(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length, + png_const_bytep profile /* header plus whole tag table */) +{ + png_uint_32 tag_count = png_get_uint_32(profile+128); + png_uint_32 itag; + png_const_bytep tag = profile+132; /* The first tag */ + + /* First scan all the tags in the table and add bits to the icc_info value + * (temporarily in 'tags'). + */ + for (itag=0; itag < tag_count; ++itag, tag += 12) + { + png_uint_32 tag_id = png_get_uint_32(tag+0); + png_uint_32 tag_start = png_get_uint_32(tag+4); /* must be aligned */ + png_uint_32 tag_length = png_get_uint_32(tag+8);/* not padded */ + + /* The ICC specification does not exclude zero length tags, therefore the + * start might actually be anywhere if there is no data, but this would be + * a clear abuse of the intent of the standard so the start is checked for + * being in range. All defined tag types have an 8 byte header - a 4 byte + * type signature then 0. + */ + if ((tag_start & 3) != 0) + { + /* CNHP730S.icc shipped with Microsoft Windows 64 violates this, it is + * only a warning here because libpng does not care about the + * alignment. + */ + (void)png_icc_profile_error(png_ptr, NULL, name, tag_id, + "ICC profile tag start not a multiple of 4"); + } + + /* This is a hard error; potentially it can cause read outside the + * profile. + */ + if (tag_start > profile_length || tag_length > profile_length - tag_start) + return png_icc_profile_error(png_ptr, colorspace, name, tag_id, + "ICC profile tag outside profile"); + } + + return 1; /* success, maybe with warnings */ +} + +#ifdef PNG_sRGB_SUPPORTED +#if PNG_sRGB_PROFILE_CHECKS >= 0 +/* Information about the known ICC sRGB profiles */ +static const struct +{ + png_uint_32 adler, crc, length; + png_uint_32 md5[4]; + png_byte have_md5; + png_byte is_broken; + png_uint_16 intent; + +# define PNG_MD5(a,b,c,d) { a, b, c, d }, (a!=0)||(b!=0)||(c!=0)||(d!=0) +# define PNG_ICC_CHECKSUM(adler, crc, md5, intent, broke, date, length, fname)\ + { adler, crc, length, md5, broke, intent }, + +} png_sRGB_checks[] = +{ + /* This data comes from contrib/tools/checksum-icc run on downloads of + * all four ICC sRGB profiles from www.color.org. + */ + /* adler32, crc32, MD5[4], intent, date, length, file-name */ + PNG_ICC_CHECKSUM(0x0a3fd9f6, 0x3b8772b9, + PNG_MD5(0x29f83dde, 0xaff255ae, 0x7842fae4, 0xca83390d), 0, 0, + "2009/03/27 21:36:31", 3048, "sRGB_IEC61966-2-1_black_scaled.icc") + + /* ICC sRGB v2 perceptual no black-compensation: */ + PNG_ICC_CHECKSUM(0x4909e5e1, 0x427ebb21, + PNG_MD5(0xc95bd637, 0xe95d8a3b, 0x0df38f99, 0xc1320389), 1, 0, + "2009/03/27 21:37:45", 3052, "sRGB_IEC61966-2-1_no_black_scaling.icc") + + PNG_ICC_CHECKSUM(0xfd2144a1, 0x306fd8ae, + PNG_MD5(0xfc663378, 0x37e2886b, 0xfd72e983, 0x8228f1b8), 0, 0, + "2009/08/10 17:28:01", 60988, "sRGB_v4_ICC_preference_displayclass.icc") + + /* ICC sRGB v4 perceptual */ + PNG_ICC_CHECKSUM(0x209c35d2, 0xbbef7812, + PNG_MD5(0x34562abf, 0x994ccd06, 0x6d2c5721, 0xd0d68c5d), 0, 0, + "2007/07/25 00:05:37", 60960, "sRGB_v4_ICC_preference.icc") + + /* The following profiles have no known MD5 checksum. If there is a match + * on the (empty) MD5 the other fields are used to attempt a match and + * a warning is produced. The first two of these profiles have a 'cprt' tag + * which suggests that they were also made by Hewlett Packard. + */ + PNG_ICC_CHECKSUM(0xa054d762, 0x5d5129ce, + PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 1, 0, + "2004/07/21 18:57:42", 3024, "sRGB_IEC61966-2-1_noBPC.icc") + + /* This is a 'mntr' (display) profile with a mediaWhitePointTag that does not + * match the D50 PCS illuminant in the header (it is in fact the D65 values, + * so the white point is recorded as the un-adapted value.) The profiles + * below only differ in one byte - the intent - and are basically the same as + * the previous profile except for the mediaWhitePointTag error and a missing + * chromaticAdaptationTag. + */ + PNG_ICC_CHECKSUM(0xf784f3fb, 0x182ea552, + PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 0, 1/*broken*/, + "1998/02/09 06:49:00", 3144, "HP-Microsoft sRGB v2 perceptual") + + PNG_ICC_CHECKSUM(0x0398f3fc, 0xf29e526d, + PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 1, 1/*broken*/, + "1998/02/09 06:49:00", 3144, "HP-Microsoft sRGB v2 media-relative") +}; + +static int +png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr, + png_const_bytep profile, uLong adler) +{ + /* The quick check is to verify just the MD5 signature and trust the + * rest of the data. Because the profile has already been verified for + * correctness this is safe. png_colorspace_set_sRGB will check the 'intent' + * field too, so if the profile has been edited with an intent not defined + * by sRGB (but maybe defined by a later ICC specification) the read of + * the profile will fail at that point. + */ + + png_uint_32 length = 0; + png_uint_32 intent = 0x10000; /* invalid */ +#if PNG_sRGB_PROFILE_CHECKS > 1 + uLong crc = 0; /* the value for 0 length data */ +#endif + unsigned int i; + +#ifdef PNG_SET_OPTION_SUPPORTED + /* First see if PNG_SKIP_sRGB_CHECK_PROFILE has been set to "on" */ + if (((png_ptr->options >> PNG_SKIP_sRGB_CHECK_PROFILE) & 3) == + PNG_OPTION_ON) + return 0; +#endif + + for (i=0; i < (sizeof png_sRGB_checks) / (sizeof png_sRGB_checks[0]); ++i) + { + if (png_get_uint_32(profile+84) == png_sRGB_checks[i].md5[0] && + png_get_uint_32(profile+88) == png_sRGB_checks[i].md5[1] && + png_get_uint_32(profile+92) == png_sRGB_checks[i].md5[2] && + png_get_uint_32(profile+96) == png_sRGB_checks[i].md5[3]) + { + /* This may be one of the old HP profiles without an MD5, in that + * case we can only use the length and Adler32 (note that these + * are not used by default if there is an MD5!) + */ +# if PNG_sRGB_PROFILE_CHECKS == 0 + if (png_sRGB_checks[i].have_md5 != 0) + return 1+png_sRGB_checks[i].is_broken; +# endif + + /* Profile is unsigned or more checks have been configured in. */ + if (length == 0) + { + length = png_get_uint_32(profile); + intent = png_get_uint_32(profile+64); + } + + /* Length *and* intent must match */ + if (length == (png_uint_32) png_sRGB_checks[i].length && + intent == (png_uint_32) png_sRGB_checks[i].intent) + { + /* Now calculate the adler32 if not done already. */ + if (adler == 0) + { + adler = adler32(0, NULL, 0); + adler = adler32(adler, profile, length); + } + + if (adler == png_sRGB_checks[i].adler) + { + /* These basic checks suggest that the data has not been + * modified, but if the check level is more than 1 perform + * our own crc32 checksum on the data. + */ +# if PNG_sRGB_PROFILE_CHECKS > 1 + if (crc == 0) + { + crc = crc32(0, NULL, 0); + crc = crc32(crc, profile, length); + } + + /* So this check must pass for the 'return' below to happen. + */ + if (crc == png_sRGB_checks[i].crc) +# endif + { + if (png_sRGB_checks[i].is_broken != 0) + { + /* These profiles are known to have bad data that may cause + * problems if they are used, therefore attempt to + * discourage their use, skip the 'have_md5' warning below, + * which is made irrelevant by this error. + */ + png_chunk_report(png_ptr, "known incorrect sRGB profile", + PNG_CHUNK_ERROR); + } + + /* Warn that this being done; this isn't even an error since + * the profile is perfectly valid, but it would be nice if + * people used the up-to-date ones. + */ + else if (png_sRGB_checks[i].have_md5 == 0) + { + png_chunk_report(png_ptr, + "out-of-date sRGB profile with no signature", + PNG_CHUNK_WARNING); + } + + return 1+png_sRGB_checks[i].is_broken; + } + } + +# if PNG_sRGB_PROFILE_CHECKS > 0 + /* The signature matched, but the profile had been changed in some + * way. This probably indicates a data error or uninformed hacking. + * Fall through to "no match". + */ + png_chunk_report(png_ptr, + "Not recognizing known sRGB profile that has been edited", + PNG_CHUNK_WARNING); + break; +# endif + } + } + } + + return 0; /* no match */ +} +#endif /* PNG_sRGB_PROFILE_CHECKS >= 0 */ + +void /* PRIVATE */ +png_icc_set_sRGB(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_bytep profile, uLong adler) +{ + /* Is this profile one of the known ICC sRGB profiles? If it is, just set + * the sRGB information. + */ +#if PNG_sRGB_PROFILE_CHECKS >= 0 + if (png_compare_ICC_profile_with_sRGB(png_ptr, profile, adler) != 0) #endif + (void)png_colorspace_set_sRGB(png_ptr, colorspace, + (int)/*already checked*/png_get_uint_32(profile+64)); +} +#endif /* sRGB */ + +int /* PRIVATE */ +png_colorspace_set_ICC(png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_charp name, png_uint_32 profile_length, png_const_bytep profile, + int color_type) +{ + if ((colorspace->flags & PNG_COLORSPACE_INVALID) != 0) + return 0; + + if (png_icc_check_length(png_ptr, colorspace, name, profile_length) != 0 && + png_icc_check_header(png_ptr, colorspace, name, profile_length, profile, + color_type) != 0 && + png_icc_check_tag_table(png_ptr, colorspace, name, profile_length, + profile) != 0) + { +# ifdef PNG_sRGB_SUPPORTED + /* If no sRGB support, don't try storing sRGB information */ + png_icc_set_sRGB(png_ptr, colorspace, profile, 0); +# endif + return 1; + } + + /* Failure case */ + return 0; +} +#endif /* iCCP */ + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +void /* PRIVATE */ +png_colorspace_set_rgb_coefficients(png_structrp png_ptr) +{ + /* Set the rgb_to_gray coefficients from the colorspace. */ + if (png_ptr->rgb_to_gray_coefficients_set == 0 && + (png_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) + { + /* png_set_background has not been called, get the coefficients from the Y + * values of the colorspace colorants. + */ + png_fixed_point r = png_ptr->colorspace.end_points_XYZ.red_Y; + png_fixed_point g = png_ptr->colorspace.end_points_XYZ.green_Y; + png_fixed_point b = png_ptr->colorspace.end_points_XYZ.blue_Y; + png_fixed_point total = r+g+b; + + if (total > 0 && + r >= 0 && png_muldiv(&r, r, 32768, total) && r >= 0 && r <= 32768 && + g >= 0 && png_muldiv(&g, g, 32768, total) && g >= 0 && g <= 32768 && + b >= 0 && png_muldiv(&b, b, 32768, total) && b >= 0 && b <= 32768 && + r+g+b <= 32769) + { + /* We allow 0 coefficients here. r+g+b may be 32769 if two or + * all of the coefficients were rounded up. Handle this by + * reducing the *largest* coefficient by 1; this matches the + * approach used for the default coefficients in pngrtran.c + */ + int add = 0; + + if (r+g+b > 32768) + add = -1; + else if (r+g+b < 32768) + add = 1; + + if (add != 0) + { + if (g >= r && g >= b) + g += add; + else if (r >= g && r >= b) + r += add; + else + b += add; + } + + /* Check for an internal error. */ + if (r+g+b != 32768) + png_error(png_ptr, + "internal error handling cHRM coefficients"); + + else + { + png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r; + png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g; + } + } + + /* This is a png_error at present even though it could be ignored - + * it should never happen, but it is important that if it does, the + * bug is fixed. + */ + else + png_error(png_ptr, "internal error handling cHRM->XYZ"); + } +} +#endif /* READ_RGB_TO_GRAY */ + +#endif /* COLORSPACE */ #ifdef __GNUC__ /* This exists solely to work round a warning from GNU C. */ @@ -1179,7 +2477,7 @@ png_gt(size_t a, size_t b) #endif void /* PRIVATE */ -png_check_IHDR(png_structp png_ptr, +png_check_IHDR(png_const_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type) @@ -1192,18 +2490,19 @@ png_check_IHDR(png_structp png_ptr, png_warning(png_ptr, "Image width is zero in IHDR"); error = 1; } - else if (width > PNG_UINT_31_MAX) + + if (width > PNG_UINT_31_MAX) { png_warning(png_ptr, "Invalid image width in IHDR"); error = 1; } - else if (png_gt(width, - (PNG_SIZE_MAX >> 3) /* 8-byte RGBA pixels */ - - 48 /* big_row_buf hack */ - - 1 /* filter byte */ - - 7*8 /* rounding width to multiple of 8 pix */ - - 8)) /* extra max_pixel_depth pad */ + if (png_gt(((width + 7) & (~7)), + ((PNG_SIZE_MAX + - 48 /* big_row_buf hack */ + - 1) /* filter byte */ + / 8) /* 8-byte RGBA pixels */ + - 1)) /* extra max_pixel_depth pad */ { /* The size of the row must be within the limits of this architecture. * Because the read code can perform arbitrary transformations the @@ -1219,17 +2518,15 @@ png_check_IHDR(png_structp png_ptr, png_warning(png_ptr, "Image width is too large for this architecture"); error = 1; } - else + +#ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (width > png_ptr->user_width_max) +#else + if (width > PNG_USER_WIDTH_MAX) +#endif { -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - if (width > png_ptr->user_width_max) -# else - if (width > PNG_USER_WIDTH_MAX) -# endif - { - png_warning(png_ptr, "Image width exceeds user limit in IHDR"); - error = 1; - } + png_warning(png_ptr, "Image width exceeds user limit in IHDR"); + error = 1; } if (height == 0) @@ -1237,22 +2534,21 @@ png_check_IHDR(png_structp png_ptr, png_warning(png_ptr, "Image height is zero in IHDR"); error = 1; } - else if (height > PNG_UINT_31_MAX) + + if (height > PNG_UINT_31_MAX) { png_warning(png_ptr, "Invalid image height in IHDR"); error = 1; } - else + +#ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (height > png_ptr->user_height_max) +#else + if (height > PNG_USER_HEIGHT_MAX) +#endif { -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - if (height > png_ptr->user_height_max) -# else - if (height > PNG_USER_HEIGHT_MAX) -# endif - { - png_warning(png_ptr, "Image height exceeds user limit in IHDR"); - error = 1; - } + png_warning(png_ptr, "Image height exceeds user limit in IHDR"); + error = 1; } /* Check other values */ @@ -1291,7 +2587,7 @@ png_check_IHDR(png_structp png_ptr, error = 1; } -# ifdef PNG_MNG_FEATURES_SUPPORTED +#ifdef PNG_MNG_FEATURES_SUPPORTED /* Accept filter_method 64 (intrapixel differencing) only if * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and * 2. Libpng did not read a PNG signature (this filter_method is only @@ -1301,13 +2597,13 @@ png_check_IHDR(png_structp png_ptr, * 4. The filter_method is 64 and * 5. The color_type is RGB or RGBA */ - if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) && - png_ptr->mng_features_permitted) + if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) != 0 && + png_ptr->mng_features_permitted != 0) png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); if (filter_type != PNG_FILTER_TYPE_BASE) { - if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && + if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 && (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) && (color_type == PNG_COLOR_TYPE_RGB || @@ -1317,20 +2613,20 @@ png_check_IHDR(png_structp png_ptr, error = 1; } - if (png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) + if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) != 0) { png_warning(png_ptr, "Invalid filter method in IHDR"); error = 1; } } -# else +#else if (filter_type != PNG_FILTER_TYPE_BASE) { png_warning(png_ptr, "Unknown filter method in IHDR"); error = 1; } -# endif +#endif if (error == 1) png_error(png_ptr, "Invalid IHDR data"); @@ -1377,7 +2673,7 @@ png_check_fp_number(png_const_charp string, png_size_t size, int *statep, switch ((state & PNG_FP_STATE) + (type & PNG_FP_SAW_ANY)) { case PNG_FP_INTEGER + PNG_FP_SAW_SIGN: - if (state & PNG_FP_SAW_ANY) + if ((state & PNG_FP_SAW_ANY) != 0) goto PNG_FP_End; /* not a part of the number */ png_fp_add(state, type); @@ -1385,10 +2681,10 @@ png_check_fp_number(png_const_charp string, png_size_t size, int *statep, case PNG_FP_INTEGER + PNG_FP_SAW_DOT: /* Ok as trailer, ok as lead of fraction. */ - if (state & PNG_FP_SAW_DOT) /* two dots */ + if ((state & PNG_FP_SAW_DOT) != 0) /* two dots */ goto PNG_FP_End; - else if (state & PNG_FP_SAW_DIGIT) /* trailing dot? */ + else if ((state & PNG_FP_SAW_DIGIT) != 0) /* trailing dot? */ png_fp_add(state, type); else @@ -1397,7 +2693,7 @@ png_check_fp_number(png_const_charp string, png_size_t size, int *statep, break; case PNG_FP_INTEGER + PNG_FP_SAW_DIGIT: - if (state & PNG_FP_SAW_DOT) /* delayed fraction */ + if ((state & PNG_FP_SAW_DOT) != 0) /* delayed fraction */ png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT); png_fp_add(state, type | PNG_FP_WAS_VALID); @@ -1435,7 +2731,7 @@ png_check_fp_number(png_const_charp string, png_size_t size, int *statep, break; case PNG_FP_EXPONENT + PNG_FP_SAW_SIGN: - if (state & PNG_FP_SAW_ANY) + if ((state & PNG_FP_SAW_ANY) != 0) goto PNG_FP_End; /* not a part of the number */ png_fp_add(state, PNG_FP_SAW_SIGN); @@ -1478,13 +2774,13 @@ png_check_fp_string(png_const_charp string, png_size_t size) int state=0; png_size_t char_index=0; - if (png_check_fp_number(string, size, &state, &char_index) && + if (png_check_fp_number(string, size, &state, &char_index) != 0 && (char_index == size || string[char_index] == 0)) return state /* must be non-zero - see above */; return 0; /* i.e. fail */ } -#endif /* pCAL or sCAL */ +#endif /* pCAL || sCAL */ #ifdef PNG_sCAL_SUPPORTED # ifdef PNG_FLOATING_POINT_SUPPORTED @@ -1495,7 +2791,7 @@ static double png_pow10(int power) { int recip = 0; - double d = 1.0; + double d = 1; /* Handle negative exponent with a reciprocal at the end because * 10 is exact whereas .1 is inexact in base 2 @@ -1509,7 +2805,7 @@ png_pow10(int power) if (power > 0) { /* Decompose power bitwise. */ - double mult = 10.0; + double mult = 10; do { if (power & 1) d *= mult; @@ -1529,7 +2825,7 @@ png_pow10(int power) * precision. */ void /* PRIVATE */ -png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, +png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size, double fp, unsigned int precision) { /* We use standard functions from math.h, but not printf because @@ -1556,7 +2852,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, if (fp >= DBL_MIN && fp <= DBL_MAX) { - int exp_b10; /* A base 10 exponent */ + int exp_b10; /* A base 10 exponent */ double base; /* 10^exp_b10 */ /* First extract a base 10 exponent of the number, @@ -1604,7 +2900,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, */ { - int czero, clead, cdigits; + unsigned int czero, clead, cdigits; char exponent[10]; /* Allow up to two leading zeros - this will not lengthen @@ -1628,21 +2924,20 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, { double d; - fp *= 10.0; - + fp *= 10; /* Use modf here, not floor and subtract, so that * the separation is done in one step. At the end * of the loop don't break the number into parts so * that the final digit is rounded. */ - if (cdigits+czero-clead+1 < (int)precision) + if (cdigits+czero+1 < precision+clead) fp = modf(fp, &d); else { d = floor(fp + .5); - if (d > 9.0) + if (d > 9) { /* Rounding up to 10, handle that here. */ if (czero > 0) @@ -1650,10 +2945,9 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, --czero, d = 1; if (cdigits == 0) --clead; } - else { - while (cdigits > 0 && d > 9.0) + while (cdigits > 0 && d > 9) { int ch = *--ascii; @@ -1678,7 +2972,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, * exponent but take into account the leading * decimal point. */ - if (d > 9.0) /* cdigits == 0 */ + if (d > 9) /* cdigits == 0 */ { if (exp_b10 == (-1)) { @@ -1699,19 +2993,18 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, ++exp_b10; /* In all cases we output a '1' */ - d = 1.0; + d = 1; } } } fp = 0; /* Guarantees termination below. */ } - if (d == 0.0) + if (d == 0) { ++czero; if (cdigits == 0) ++clead; } - else { /* Included embedded zeros in the digit count. */ @@ -1735,15 +3028,15 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, if (exp_b10 != (-1)) { - if (exp_b10 == 0) *ascii++ = 46, --size; /* counted - above */ + if (exp_b10 == 0) + *ascii++ = 46, --size; /* counted above */ + --exp_b10; } - *ascii++ = (char)(48 + (int)d), ++cdigits; } } - while (cdigits+czero-clead < (int)precision && fp > DBL_MIN); + while (cdigits+czero < precision+clead && fp > DBL_MIN); /* The total output count (max) is now 4+precision */ @@ -1811,7 +3104,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, /* Need another size check here for the exponent digits, so * this need not be considered above. */ - if ((int)size > cdigits) + if (size > cdigits) { while (cdigits > 0) *ascii++ = exponent[--cdigits]; @@ -1847,8 +3140,8 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, /* Function to format a fixed point value in ASCII. */ void /* PRIVATE */ -png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, - png_fixed_point fp) +png_ascii_from_fixed(png_const_structrp png_ptr, png_charp ascii, + png_size_t size, png_fixed_point fp) { /* Require space for 10 decimal digits, a decimal point, a minus sign and a * trailing \0, 13 characters: @@ -1859,7 +3152,7 @@ png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, /* Avoid overflow here on the minimum integer. */ if (fp < 0) - *ascii++ = 45, --size, num = -fp; + *ascii++ = 45, num = -fp; else num = fp; @@ -1915,23 +3208,32 @@ png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, png_error(png_ptr, "ASCII conversion buffer too small"); } # endif /* FIXED_POINT */ -#endif /* READ_SCAL */ +#endif /* SCAL */ #if defined(PNG_FLOATING_POINT_SUPPORTED) && \ - !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) + !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) && \ + (defined(PNG_gAMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED) || \ + defined(PNG_sCAL_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)) || \ + (defined(PNG_sCAL_SUPPORTED) && \ + defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)) png_fixed_point -png_fixed(png_structp png_ptr, double fp, png_const_charp text) +png_fixed(png_const_structrp png_ptr, double fp, png_const_charp text) { double r = floor(100000 * fp + .5); if (r > 2147483647. || r < -2147483648.) png_fixed_error(png_ptr, text); +# ifndef PNG_ERROR_TEXT_SUPPORTED + PNG_UNUSED(text) +# endif + return (png_fixed_point)r; } #endif -#if defined(PNG_READ_GAMMA_SUPPORTED) || \ +#if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_COLORSPACE_SUPPORTED) ||\ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED) /* muldiv functions */ /* This API takes signed arguments and rounds the result to the nearest @@ -2040,7 +3342,8 @@ png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times, result = -result; /* Check for overflow. */ - if ((negative && result <= 0) || (!negative && result >= 0)) + if ((negative != 0 && result <= 0) || + (negative == 0 && result >= 0)) { *res = result; return 1; @@ -2059,12 +3362,12 @@ png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times, * result. */ png_fixed_point -png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times, +png_muldiv_warn(png_const_structrp png_ptr, png_fixed_point a, png_int_32 times, png_int_32 divisor) { png_fixed_point result; - if (png_muldiv(&result, a, times, divisor)) + if (png_muldiv(&result, a, times, divisor) != 0) return result; png_warning(png_ptr, "fixed point overflow ignored"); @@ -2072,31 +3375,39 @@ png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times, } #endif -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED) -/* more fixed point functions for gamma and cHRM (xy/XYZ) suport. */ +#ifdef PNG_GAMMA_SUPPORTED /* more fixed point functions for gamma */ /* Calculate a reciprocal, return 0 on div-by-zero or overflow. */ png_fixed_point png_reciprocal(png_fixed_point a) { - if (a != 0) - { #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = floor(1E10/a+.5); + double r = floor(1E10/a+.5); - if (r <= 2147483647. && r >= -2147483648.) - return (png_fixed_point)r; + if (r <= 2147483647. && r >= -2147483648.) + return (png_fixed_point)r; #else - png_fixed_point res; + png_fixed_point res; - if (png_muldiv(&res, 100000, 100000, a)) - return res; + if (png_muldiv(&res, 100000, 100000, a) != 0) + return res; #endif - } return 0; /* error/overflow */ } +/* This is the shared test on whether a gamma value is 'significant' - whether + * it is worth doing gamma correction. + */ +int /* PRIVATE */ +png_gamma_significant(png_fixed_point gamma_val) +{ + return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED || + gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED; +} +#endif + #ifdef PNG_READ_GAMMA_SUPPORTED +#ifdef PNG_16BIT_SUPPORTED /* A local convenience routine. */ static png_fixed_point png_product2(png_fixed_point a, png_fixed_point b) @@ -2112,13 +3423,13 @@ png_product2(png_fixed_point a, png_fixed_point b) #else png_fixed_point res; - if (png_muldiv(&res, a, b, 100000)) + if (png_muldiv(&res, a, b, 100000) != 0) return res; #endif return 0; /* overflow */ } -#endif /* READ_GAMMA */ +#endif /* 16BIT */ /* The inverse of the above. */ png_fixed_point @@ -2136,10 +3447,10 @@ png_reciprocal2(png_fixed_point a, png_fixed_point b) return (png_fixed_point)r; } #else - /* This may overflow because the range of png_fixed_point isn't - * symmetric, but this API is only used for the product of file and - * screen gamma so it doesn't matter that the smallest number it can - * produce is 1/21474, not 1/100000 + /* This may overflow because the range of png_fixed_point isn't symmetric, + * but this API is only used for the product of file and screen gamma so it + * doesn't matter that the smallest number it can produce is 1/21474, not + * 1/100000 */ png_fixed_point res = png_product2(a, b); @@ -2149,75 +3460,30 @@ png_reciprocal2(png_fixed_point a, png_fixed_point b) return 0; /* overflow */ } -#endif /* READ_GAMMA || cHRM */ - -#ifdef PNG_CHECK_cHRM_SUPPORTED -/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2, - * 2010: moved from pngset.c) */ -/* - * Multiply two 32-bit numbers, V1 and V2, using 32-bit - * arithmetic, to produce a 64-bit result in the HI/LO words. - * - * A B - * x C D - * ------ - * AD || BD - * AC || CB || 0 - * - * where A and B are the high and low 16-bit words of V1, - * C and D are the 16-bit words of V2, AD is the product of - * A and D, and X || Y is (X << 16) + Y. -*/ - -void /* PRIVATE */ -png_64bit_product (long v1, long v2, unsigned long *hi_product, - unsigned long *lo_product) -{ - int a, b, c, d; - long lo, hi, x, y; - - a = (v1 >> 16) & 0xffff; - b = v1 & 0xffff; - c = (v2 >> 16) & 0xffff; - d = v2 & 0xffff; - - lo = b * d; /* BD */ - x = a * d + c * b; /* AD + CB */ - y = ((lo >> 16) & 0xffff) + x; - - lo = (lo & 0xffff) | ((y & 0xffff) << 16); - hi = (y >> 16) & 0xffff; - - hi += a * c; /* AC */ - - *hi_product = (unsigned long)hi; - *lo_product = (unsigned long)lo; -} -#endif /* CHECK_cHRM */ +#endif /* READ_GAMMA */ #ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */ #ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED /* Fixed point gamma. * + * The code to calculate the tables used below can be found in the shell script + * contrib/tools/intgamma.sh + * * To calculate gamma this code implements fast log() and exp() calls using only * fixed point arithmetic. This code has sufficient precision for either 8-bit * or 16-bit sample values. * * The tables used here were calculated using simple 'bc' programs, but C double - * precision floating point arithmetic would work fine. The programs are given - * at the head of each table. + * precision floating point arithmetic would work fine. * * 8-bit log table * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to * 255, so it's the base 2 logarithm of a normalized 8-bit floating point * mantissa. The numbers are 32-bit fractions. */ -static png_uint_32 +static const png_uint_32 png_8bit_l2[128] = { -# ifdef PNG_DO_BC - for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; } -# else 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U, 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U, 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U, @@ -2240,7 +3506,6 @@ png_8bit_l2[128] = 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U, 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U, 24347096U, 0U -# endif #if 0 /* The following are the values for 16-bit tables - these work fine for the @@ -2263,18 +3528,18 @@ png_8bit_l2[128] = #endif }; -PNG_STATIC png_int_32 +static png_int_32 png_log8bit(unsigned int x) { unsigned int lg2 = 0; /* Each time 'x' is multiplied by 2, 1 must be subtracted off the final log, * because the log is actually negate that means adding 1. The final * returned value thus has the range 0 (for 255 input) to 7.994 (for 1 - * input), return 7.99998 for the overflow (log 0) case - so the result is + * input), return -1 for the overflow (log 0) case, - so the result is * always at most 19 bits. */ if ((x &= 0xff) == 0) - return 0xffffffff; + return -1; if ((x & 0xf0) == 0) lg2 = 4, x <<= 4; @@ -2319,14 +3584,15 @@ png_log8bit(unsigned int x) * Zero (257): 0 * End (258): 23499 */ -PNG_STATIC png_int_32 +#ifdef PNG_16BIT_SUPPORTED +static png_int_32 png_log16bit(png_uint_32 x) { unsigned int lg2 = 0; /* As above, but now the input has 16 bits. */ if ((x &= 0xffff) == 0) - return 0xffffffff; + return -1; if ((x & 0xff00) == 0) lg2 = 8, x <<= 8; @@ -2369,13 +3635,14 @@ png_log16bit(png_uint_32 x) /* Safe, because the result can't have more than 20 bits: */ return (png_int_32)((lg2 + 2048) >> 12); } +#endif /* 16BIT */ /* The 'exp()' case must invert the above, taking a 20-bit fixed point * logarithmic value and returning a 16 or 8-bit number as appropriate. In * each case only the low 16 bits are relevant - the fraction - since the * integer bits (the top 4) simply determine a shift. * - * The worst case is the 16-bit distinction between 65535 and 65534, this + * The worst case is the 16-bit distinction between 65535 and 65534. This * requires perhaps spurious accuracy in the decoding of the logarithm to * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance * of getting this accuracy in practice. @@ -2384,21 +3651,17 @@ png_log16bit(png_uint_32 x) * frational part of the logarithm by using an accurate 32-bit value from the * top four fractional bits then multiplying in the remaining bits. */ -static png_uint_32 +static const png_uint_32 png_32bit_exp[16] = { -# ifdef PNG_DO_BC - for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; } -# else /* NOTE: the first entry is deliberately set to the maximum 32-bit value. */ 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U, 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U, 2553802834U, 2445529972U, 2341847524U, 2242560872U -# endif }; /* Adjustment table; provided to explain the numbers in the code below. */ -#ifdef PNG_DO_BC +#if 0 for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"} 11 44937.64284865548751208448 10 45180.98734845585101160448 @@ -2414,13 +3677,13 @@ for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"} 0 45425.85339951654943850496 #endif -PNG_STATIC png_uint_32 +static png_uint_32 png_exp(png_fixed_point x) { if (x > 0 && x <= 0xfffff) /* Else overflow or zero (underflow) */ { /* Obtain a 4-bit approximation */ - png_uint_32 e = png_32bit_exp[(x >> 12) & 0xf]; + png_uint_32 e = png_32bit_exp[(x >> 12) & 0x0f]; /* Incorporate the low 12 bits - these decrease the returned value by * multiplying by a number less than 1 if the bit is set. The multiplier @@ -2462,21 +3725,22 @@ png_exp(png_fixed_point x) return 0; } -PNG_STATIC png_byte +static png_byte png_exp8bit(png_fixed_point lg2) { /* Get a 32-bit value: */ png_uint_32 x = png_exp(lg2); - /* Convert the 32-bit value to 0..255 by multiplying by 256-1, note that the + /* Convert the 32-bit value to 0..255 by multiplying by 256-1. Note that the * second, rounding, step can't overflow because of the first, subtraction, * step. */ x -= x >> 8; - return (png_byte)((x + 0x7fffffU) >> 24); + return (png_byte)(((x + 0x7fffffU) >> 24) & 0xff); } -PNG_STATIC png_uint_16 +#ifdef PNG_16BIT_SUPPORTED +static png_uint_16 png_exp16bit(png_fixed_point lg2) { /* Get a 32-bit value: */ @@ -2486,6 +3750,7 @@ png_exp16bit(png_fixed_point lg2) x -= x >> 16; return (png_uint_16)((x + 32767U) >> 16); } +#endif /* 16BIT */ #endif /* FLOATING_ARITHMETIC */ png_byte @@ -2494,13 +3759,37 @@ png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val) if (value > 0 && value < 255) { # ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = floor(255*pow(value/255.,gamma_val*.00001)+.5); + /* 'value' is unsigned, ANSI-C90 requires the compiler to correctly + * convert this to a floating point value. This includes values that + * would overflow if 'value' were to be converted to 'int'. + * + * Apparently GCC, however, does an intermediate conversion to (int) + * on some (ARM) but not all (x86) platforms, possibly because of + * hardware FP limitations. (E.g. if the hardware conversion always + * assumes the integer register contains a signed value.) This results + * in ANSI-C undefined behavior for large values. + * + * Other implementations on the same machine might actually be ANSI-C90 + * conformant and therefore compile spurious extra code for the large + * values. + * + * We can be reasonably sure that an unsigned to float conversion + * won't be faster than an int to float one. Therefore this code + * assumes responsibility for the undefined behavior, which it knows + * can't happen because of the check above. + * + * Note the argument to this routine is an (unsigned int) because, on + * 16-bit platforms, it is assigned a value which might be out of + * range for an (int); that would result in undefined behavior in the + * caller if the *argument* ('value') were to be declared (int). + */ + double r = floor(255*pow((int)/*SAFE*/value/255.,gamma_val*.00001)+.5); return (png_byte)r; # else png_int_32 lg2 = png_log8bit(value); png_fixed_point res; - if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) + if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1) != 0) return png_exp8bit(res); /* Overflow. */ @@ -2508,22 +3797,29 @@ png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val) # endif } - return (png_byte)value; + return (png_byte)(value & 0xff); } +#ifdef PNG_16BIT_SUPPORTED png_uint_16 png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val) { if (value > 0 && value < 65535) { # ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED - double r = floor(65535*pow(value/65535.,gamma_val*.00001)+.5); + /* The same (unsigned int)->(double) constraints apply here as above, + * however in this case the (unsigned int) to (int) conversion can + * overflow on an ANSI-C90 compliant system so the cast needs to ensure + * that this is not possible. + */ + double r = floor(65535*pow((png_int_32)value/65535., + gamma_val*.00001)+.5); return (png_uint_16)r; # else png_int_32 lg2 = png_log16bit(value); png_fixed_point res; - if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) + if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1) != 0) return png_exp16bit(res); /* Overflow. */ @@ -2533,6 +3829,7 @@ png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val) return (png_uint_16)value; } +#endif /* 16BIT */ /* This does the right thing based on the bit_depth field of the * png_struct, interpreting values as 8-bit or 16-bit. While the result @@ -2540,29 +3837,24 @@ png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val) * 8-bit (as are the arguments.) */ png_uint_16 /* PRIVATE */ -png_gamma_correct(png_structp png_ptr, unsigned int value, +png_gamma_correct(png_structrp png_ptr, unsigned int value, png_fixed_point gamma_val) { if (png_ptr->bit_depth == 8) return png_gamma_8bit_correct(value, gamma_val); +#ifdef PNG_16BIT_SUPPORTED else return png_gamma_16bit_correct(value, gamma_val); -} - -/* This is the shared test on whether a gamma value is 'significant' - whether - * it is worth doing gamma correction. - */ -int /* PRIVATE */ -png_gamma_significant(png_fixed_point gamma_val) -{ - return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED || - gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED; +#else + /* should not reach this */ + return 0; +#endif /* 16BIT */ } #ifdef PNG_16BIT_SUPPORTED /* Internal function to build a single 16-bit table - the table consists of - * 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount + * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount * to shift the input values right (or 16-number_of_signifiant_bits). * * The caller is responsible for ensuring that the table gets cleaned up on @@ -2570,27 +3862,33 @@ png_gamma_significant(png_fixed_point gamma_val) * should be somewhere that will be cleaned. */ static void -png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable, +png_build_16bit_table(png_structrp png_ptr, png_uint_16pp *ptable, PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) { /* Various values derived from 'shift': */ PNG_CONST unsigned int num = 1U << (8U - shift); +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + /* CSE the division and work round wacky GCC warnings (see the comments + * in png_gamma_8bit_correct for where these come from.) + */ + PNG_CONST double fmax = 1./(((png_int_32)1 << (16U - shift))-1); +#endif PNG_CONST unsigned int max = (1U << (16U - shift))-1U; PNG_CONST unsigned int max_by_2 = 1U << (15U-shift); unsigned int i; png_uint_16pp table = *ptable = - (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); + (png_uint_16pp)png_calloc(png_ptr, num * (sizeof (png_uint_16p))); for (i = 0; i < num; i++) { png_uint_16p sub_table = table[i] = - (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16)); + (png_uint_16p)png_malloc(png_ptr, 256 * (sizeof (png_uint_16))); /* The 'threshold' test is repeated here because it can arise for one of * the 16-bit tables even if the others don't hit it. */ - if (png_gamma_significant(gamma_val)) + if (png_gamma_significant(gamma_val) != 0) { /* The old code would overflow at the end and this would cause the * 'pow' function to return a result >1, resulting in an @@ -2606,7 +3904,10 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable, png_uint_32 ig = (j << (8-shift)) + i; # ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED /* Inline the 'max' scaling operation: */ - double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5); + /* See png_gamma_8bit_correct for why the cast to (int) is + * required here. + */ + double d = floor(65535.*pow(ig*fmax, gamma_val*.00001)+.5); sub_table[j] = (png_uint_16)d; # else if (shift != 0) @@ -2633,13 +3934,12 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable, } } } -#endif /* NOTE: this function expects the *inverse* of the overall gamma transformation * required. */ static void -png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, +png_build_16to8_table(png_structrp png_ptr, png_uint_16pp *ptable, PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) { PNG_CONST unsigned int num = 1U << (8U - shift); @@ -2648,15 +3948,15 @@ png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, png_uint_32 last; png_uint_16pp table = *ptable = - (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); + (png_uint_16pp)png_calloc(png_ptr, num * (sizeof (png_uint_16p))); - /* 'num' is the number of tables and also the number of low bits of the - * input 16-bit value used to select a table. Each table is itself indexed - * by the high 8 bits of the value. + /* 'num' is the number of tables and also the number of low bits of low + * bits of the input 16-bit value used to select a table. Each table is + * itself indexed by the high 8 bits of the value. */ for (i = 0; i < num; i++) table[i] = (png_uint_16p)png_malloc(png_ptr, - 256 * png_sizeof(png_uint_16)); + 256 * (sizeof (png_uint_16))); /* 'gamma_val' is set to the reciprocal of the value calculated above, so * pow(out,g) is an *input* value. 'last' is the last input value set. @@ -2700,34 +4000,38 @@ png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, last++; } } +#endif /* 16BIT */ /* Build a single 8-bit table: same as the 16-bit case but much simpler (and * typically much faster). Note that libpng currently does no sBIT processing * (apparently contrary to the spec) so a 256-entry table is always generated. */ static void -png_build_8bit_table(png_structp png_ptr, png_bytepp ptable, +png_build_8bit_table(png_structrp png_ptr, png_bytepp ptable, PNG_CONST png_fixed_point gamma_val) { unsigned int i; png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256); - if (png_gamma_significant(gamma_val)) for (i=0; i<256; i++) - table[i] = png_gamma_8bit_correct(i, gamma_val); + if (png_gamma_significant(gamma_val) != 0) + for (i=0; i<256; i++) + table[i] = png_gamma_8bit_correct(i, gamma_val); - else for (i=0; i<256; ++i) - table[i] = (png_byte)i; + else + for (i=0; i<256; ++i) + table[i] = (png_byte)(i & 0xff); } /* Used from png_read_destroy and below to release the memory used by the gamma * tables. */ void /* PRIVATE */ -png_destroy_gamma_table(png_structp png_ptr) +png_destroy_gamma_table(png_structrp png_ptr) { png_free(png_ptr, png_ptr->gamma_table); png_ptr->gamma_table = NULL; +#ifdef PNG_16BIT_SUPPORTED if (png_ptr->gamma_16_table != NULL) { int i; @@ -2739,6 +4043,7 @@ png_destroy_gamma_table(png_structp png_ptr) png_free(png_ptr, png_ptr->gamma_16_table); png_ptr->gamma_16_table = NULL; } +#endif /* 16BIT */ #if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ @@ -2748,6 +4053,7 @@ png_destroy_gamma_table(png_structp png_ptr) png_free(png_ptr, png_ptr->gamma_to_1); png_ptr->gamma_to_1 = NULL; +#ifdef PNG_16BIT_SUPPORTED if (png_ptr->gamma_16_from_1 != NULL) { int i; @@ -2770,6 +4076,7 @@ png_destroy_gamma_table(png_structp png_ptr) png_free(png_ptr, png_ptr->gamma_16_to_1); png_ptr->gamma_16_to_1 = NULL; } +#endif /* 16BIT */ #endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ } @@ -2779,7 +4086,7 @@ png_destroy_gamma_table(png_structp png_ptr) * we don't need to allocate > 64K chunks for a full 16-bit table. */ void /* PRIVATE */ -png_build_gamma_table(png_structp png_ptr, int bit_depth) +png_build_gamma_table(png_structrp png_ptr, int bit_depth) { png_debug(1, "in png_build_gamma_table"); @@ -2798,28 +4105,29 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth) if (bit_depth <= 8) { png_build_8bit_table(png_ptr, &png_ptr->gamma_table, - png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->colorspace.gamma, png_ptr->screen_gamma) : PNG_FP_1); #if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) + if ((png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) != 0) { png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1, - png_reciprocal(png_ptr->gamma)); + png_reciprocal(png_ptr->colorspace.gamma)); png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1, png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : - png_ptr->gamma/* Probably doing rgb_to_gray */); + png_ptr->colorspace.gamma/* Probably doing rgb_to_gray */); } #endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ } +#ifdef PNG_16BIT_SUPPORTED else { png_byte shift, sig_bit; - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) { sig_bit = png_ptr->sig_bit.red; @@ -2851,12 +4159,13 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth) * */ if (sig_bit > 0 && sig_bit < 16U) - shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */ + /* shift == insignificant bits */ + shift = (png_byte)((16U - sig_bit) & 0xff); else shift = 0; /* keep all 16 bits */ - if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) + if ((png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) != 0) { /* PNG_MAX_GAMMA_8 is the number of bits to keep - effectively * the significant bits in the *input* when the output will @@ -2871,32 +4180,28 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth) png_ptr->gamma_shift = shift; -#ifdef PNG_16BIT_SUPPORTED /* NOTE: prior to 1.5.4 this test used to include PNG_BACKGROUND (now * PNG_COMPOSE). This effectively smashed the background calculation for * 16-bit output because the 8-bit table assumes the result will be reduced * to 8 bits. */ - if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) -#endif + if ((png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) != 0) png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift, - png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma, + png_ptr->screen_gamma > 0 ? png_product2(png_ptr->colorspace.gamma, png_ptr->screen_gamma) : PNG_FP_1); -#ifdef PNG_16BIT_SUPPORTED else png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift, - png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->colorspace.gamma, png_ptr->screen_gamma) : PNG_FP_1); -#endif #if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) + if ((png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) != 0) { png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift, - png_reciprocal(png_ptr->gamma)); + png_reciprocal(png_ptr->colorspace.gamma)); /* Notice that the '16 from 1' table should be full precision, however * the lookup on this table still uses gamma_shift, so it can't be. @@ -2904,18 +4209,18 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth) */ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift, png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : - png_ptr->gamma/* Probably doing rgb_to_gray */); + png_ptr->colorspace.gamma/* Probably doing rgb_to_gray */); } #endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ } +#endif /* 16BIT */ } #endif /* READ_GAMMA */ -#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ -/* HARDWARE OPTION SUPPORT */ +/* HARDWARE OR SOFTWARE OPTION SUPPORT */ #ifdef PNG_SET_OPTION_SUPPORTED int PNGAPI -png_set_option(png_structp png_ptr, int option, int onoff) +png_set_option(png_structrp png_ptr, int option, int onoff) { if (png_ptr != NULL && option >= 0 && option < PNG_OPTION_NEXT && (option & 1) == 0) @@ -2924,7 +4229,7 @@ png_set_option(png_structp png_ptr, int option, int onoff) int setting = (2 + (onoff != 0)) << option; int current = png_ptr->options; - png_ptr->options = (png_byte)((current & ~mask) | setting); + png_ptr->options = (png_byte)(((current & ~mask) | setting) & 0xff); return (current & mask) >> option; } @@ -2932,3 +4237,263 @@ png_set_option(png_structp png_ptr, int option, int onoff) return PNG_OPTION_INVALID; } #endif + +/* sRGB support */ +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) +/* sRGB conversion tables; these are machine generated with the code in + * contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the + * specification (see the article at http://en.wikipedia.org/wiki/SRGB) + * is used, not the gamma=1/2.2 approximation use elsewhere in libpng. + * The sRGB to linear table is exact (to the nearest 16-bit linear fraction). + * The inverse (linear to sRGB) table has accuracies as follows: + * + * For all possible (255*65535+1) input values: + * + * error: -0.515566 - 0.625971, 79441 (0.475369%) of readings inexact + * + * For the input values corresponding to the 65536 16-bit values: + * + * error: -0.513727 - 0.607759, 308 (0.469978%) of readings inexact + * + * In all cases the inexact readings are only off by one. + */ + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +/* The convert-to-sRGB table is only currently required for read. */ +const png_uint_16 png_sRGB_table[256] = +{ + 0,20,40,60,80,99,119,139, + 159,179,199,219,241,264,288,313, + 340,367,396,427,458,491,526,562, + 599,637,677,718,761,805,851,898, + 947,997,1048,1101,1156,1212,1270,1330, + 1391,1453,1517,1583,1651,1720,1790,1863, + 1937,2013,2090,2170,2250,2333,2418,2504, + 2592,2681,2773,2866,2961,3058,3157,3258, + 3360,3464,3570,3678,3788,3900,4014,4129, + 4247,4366,4488,4611,4736,4864,4993,5124, + 5257,5392,5530,5669,5810,5953,6099,6246, + 6395,6547,6700,6856,7014,7174,7335,7500, + 7666,7834,8004,8177,8352,8528,8708,8889, + 9072,9258,9445,9635,9828,10022,10219,10417, + 10619,10822,11028,11235,11446,11658,11873,12090, + 12309,12530,12754,12980,13209,13440,13673,13909, + 14146,14387,14629,14874,15122,15371,15623,15878, + 16135,16394,16656,16920,17187,17456,17727,18001, + 18277,18556,18837,19121,19407,19696,19987,20281, + 20577,20876,21177,21481,21787,22096,22407,22721, + 23038,23357,23678,24002,24329,24658,24990,25325, + 25662,26001,26344,26688,27036,27386,27739,28094, + 28452,28813,29176,29542,29911,30282,30656,31033, + 31412,31794,32179,32567,32957,33350,33745,34143, + 34544,34948,35355,35764,36176,36591,37008,37429, + 37852,38278,38706,39138,39572,40009,40449,40891, + 41337,41785,42236,42690,43147,43606,44069,44534, + 45002,45473,45947,46423,46903,47385,47871,48359, + 48850,49344,49841,50341,50844,51349,51858,52369, + 52884,53401,53921,54445,54971,55500,56032,56567, + 57105,57646,58190,58737,59287,59840,60396,60955, + 61517,62082,62650,63221,63795,64372,64952,65535 +}; +#endif /* SIMPLIFIED_READ */ + +/* The base/delta tables are required for both read and write (but currently + * only the simplified versions.) + */ +const png_uint_16 png_sRGB_base[512] = +{ + 128,1782,3383,4644,5675,6564,7357,8074, + 8732,9346,9921,10463,10977,11466,11935,12384, + 12816,13233,13634,14024,14402,14769,15125,15473, + 15812,16142,16466,16781,17090,17393,17690,17981, + 18266,18546,18822,19093,19359,19621,19879,20133, + 20383,20630,20873,21113,21349,21583,21813,22041, + 22265,22487,22707,22923,23138,23350,23559,23767, + 23972,24175,24376,24575,24772,24967,25160,25352, + 25542,25730,25916,26101,26284,26465,26645,26823, + 27000,27176,27350,27523,27695,27865,28034,28201, + 28368,28533,28697,28860,29021,29182,29341,29500, + 29657,29813,29969,30123,30276,30429,30580,30730, + 30880,31028,31176,31323,31469,31614,31758,31902, + 32045,32186,32327,32468,32607,32746,32884,33021, + 33158,33294,33429,33564,33697,33831,33963,34095, + 34226,34357,34486,34616,34744,34873,35000,35127, + 35253,35379,35504,35629,35753,35876,35999,36122, + 36244,36365,36486,36606,36726,36845,36964,37083, + 37201,37318,37435,37551,37668,37783,37898,38013, + 38127,38241,38354,38467,38580,38692,38803,38915, + 39026,39136,39246,39356,39465,39574,39682,39790, + 39898,40005,40112,40219,40325,40431,40537,40642, + 40747,40851,40955,41059,41163,41266,41369,41471, + 41573,41675,41777,41878,41979,42079,42179,42279, + 42379,42478,42577,42676,42775,42873,42971,43068, + 43165,43262,43359,43456,43552,43648,43743,43839, + 43934,44028,44123,44217,44311,44405,44499,44592, + 44685,44778,44870,44962,45054,45146,45238,45329, + 45420,45511,45601,45692,45782,45872,45961,46051, + 46140,46229,46318,46406,46494,46583,46670,46758, + 46846,46933,47020,47107,47193,47280,47366,47452, + 47538,47623,47709,47794,47879,47964,48048,48133, + 48217,48301,48385,48468,48552,48635,48718,48801, + 48884,48966,49048,49131,49213,49294,49376,49458, + 49539,49620,49701,49782,49862,49943,50023,50103, + 50183,50263,50342,50422,50501,50580,50659,50738, + 50816,50895,50973,51051,51129,51207,51285,51362, + 51439,51517,51594,51671,51747,51824,51900,51977, + 52053,52129,52205,52280,52356,52432,52507,52582, + 52657,52732,52807,52881,52956,53030,53104,53178, + 53252,53326,53400,53473,53546,53620,53693,53766, + 53839,53911,53984,54056,54129,54201,54273,54345, + 54417,54489,54560,54632,54703,54774,54845,54916, + 54987,55058,55129,55199,55269,55340,55410,55480, + 55550,55620,55689,55759,55828,55898,55967,56036, + 56105,56174,56243,56311,56380,56448,56517,56585, + 56653,56721,56789,56857,56924,56992,57059,57127, + 57194,57261,57328,57395,57462,57529,57595,57662, + 57728,57795,57861,57927,57993,58059,58125,58191, + 58256,58322,58387,58453,58518,58583,58648,58713, + 58778,58843,58908,58972,59037,59101,59165,59230, + 59294,59358,59422,59486,59549,59613,59677,59740, + 59804,59867,59930,59993,60056,60119,60182,60245, + 60308,60370,60433,60495,60558,60620,60682,60744, + 60806,60868,60930,60992,61054,61115,61177,61238, + 61300,61361,61422,61483,61544,61605,61666,61727, + 61788,61848,61909,61969,62030,62090,62150,62211, + 62271,62331,62391,62450,62510,62570,62630,62689, + 62749,62808,62867,62927,62986,63045,63104,63163, + 63222,63281,63340,63398,63457,63515,63574,63632, + 63691,63749,63807,63865,63923,63981,64039,64097, + 64155,64212,64270,64328,64385,64443,64500,64557, + 64614,64672,64729,64786,64843,64900,64956,65013, + 65070,65126,65183,65239,65296,65352,65409,65465 +}; + +const png_byte png_sRGB_delta[512] = +{ + 207,201,158,129,113,100,90,82,77,72,68,64,61,59,56,54, + 52,50,49,47,46,45,43,42,41,40,39,39,38,37,36,36, + 35,34,34,33,33,32,32,31,31,30,30,30,29,29,28,28, + 28,27,27,27,27,26,26,26,25,25,25,25,24,24,24,24, + 23,23,23,23,23,22,22,22,22,22,22,21,21,21,21,21, + 21,20,20,20,20,20,20,20,20,19,19,19,19,19,19,19, + 19,18,18,18,18,18,18,18,18,18,18,17,17,17,17,17, + 17,17,17,17,17,17,16,16,16,16,16,16,16,16,16,16, + 16,16,16,16,15,15,15,15,15,15,15,15,15,15,15,15, + 15,15,15,15,14,14,14,14,14,14,14,14,14,14,14,14, + 14,14,14,14,14,14,14,13,13,13,13,13,13,13,13,13, + 13,13,13,13,13,13,13,13,13,13,13,13,13,13,12,12, + 12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12, + 12,12,12,12,12,12,12,12,12,12,12,12,11,11,11,11, + 11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11, + 11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11, + 11,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10, + 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10, + 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10, + 10,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 +}; +#endif /* SIMPLIFIED READ/WRITE sRGB support */ + +/* SIMPLIFIED READ/WRITE SUPPORT */ +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) +static int +png_image_free_function(png_voidp argument) +{ + png_imagep image = png_voidcast(png_imagep, argument); + png_controlp cp = image->opaque; + png_control c; + + /* Double check that we have a png_ptr - it should be impossible to get here + * without one. + */ + if (cp->png_ptr == NULL) + return 0; + + /* First free any data held in the control structure. */ +# ifdef PNG_STDIO_SUPPORTED + if (cp->owned_file != 0) + { + FILE *fp = png_voidcast(FILE*, cp->png_ptr->io_ptr); + cp->owned_file = 0; + + /* Ignore errors here. */ + if (fp != NULL) + { + cp->png_ptr->io_ptr = NULL; + (void)fclose(fp); + } + } +# endif + + /* Copy the control structure so that the original, allocated, version can be + * safely freed. Notice that a png_error here stops the remainder of the + * cleanup, but this is probably fine because that would indicate bad memory + * problems anyway. + */ + c = *cp; + image->opaque = &c; + png_free(c.png_ptr, cp); + + /* Then the structures, calling the correct API. */ + if (c.for_write != 0) + { +# ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED + png_destroy_write_struct(&c.png_ptr, &c.info_ptr); +# else + png_error(c.png_ptr, "simplified write not supported"); +# endif + } + else + { +# ifdef PNG_SIMPLIFIED_READ_SUPPORTED + png_destroy_read_struct(&c.png_ptr, &c.info_ptr, NULL); +# else + png_error(c.png_ptr, "simplified read not supported"); +# endif + } + + /* Success. */ + return 1; +} + +void PNGAPI +png_image_free(png_imagep image) +{ + /* Safely call the real function, but only if doing so is safe at this point + * (if not inside an error handling context). Otherwise assume + * png_safe_execute will call this API after the return. + */ + if (image != NULL && image->opaque != NULL && + image->opaque->error_buf == NULL) + { + /* Ignore errors here: */ + (void)png_safe_execute(image, png_image_free_function, image); + image->opaque = NULL; + } +} + +int /* PRIVATE */ +png_image_error(png_imagep image, png_const_charp error_message) +{ + /* Utility to log an error. */ + png_safecat(image->message, (sizeof image->message), 0, error_message); + image->warning_or_error |= PNG_IMAGE_ERROR; + png_image_free(image); + return 0; +} + +#endif /* SIMPLIFIED READ/WRITE */ +#endif /* READ || WRITE */ diff --git a/drivers/png/png.h b/drivers/png/png.h index f726c7282f..1efb0b02a9 100644 --- a/drivers/png/png.h +++ b/drivers/png/png.h @@ -1,7 +1,7 @@ /* png.h - header file for PNG reference library * - * libpng version 1.5.27, May 26, 2016 + * libpng version 1.6.23, June 9, 2016 * * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) @@ -11,8 +11,8 @@ * * Authors and maintainers: * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat - * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger - * libpng versions 0.97, January 1998, through 1.5.27, May 26, 2016: + * libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger + * libpng versions 0.97, January 1998, through 1.6.23, June 9, 2016: * Glenn Randers-Pehrson. * See also "Contributing Authors", below. */ @@ -25,7 +25,11 @@ * * This code is released under the libpng license. * - * libpng versions 1.0.7, July 1, 2000, through 1.5.27, May 26, 2016, are + * Some files in the "contrib" directory and some configure-generated + * files that are distributed with libpng have other copyright owners and + * are released under other open source licenses. + * + * libpng versions 1.0.7, July 1, 2000 through 1.6.23, June 9, 2016 are * Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are * derived from libpng-1.0.6, and are distributed according to the same * disclaimer and license as libpng-1.0.6 with the following individuals @@ -36,6 +40,7 @@ * Mans Rullgard * Cosmin Truta * Gilles Vollant + * James Yu * * and with the following additions to the disclaimer: * @@ -46,6 +51,10 @@ * risk of satisfactory quality, performance, accuracy, and effort is with * the user. * + * Some files in the "contrib" directory have other copyright owners and + * are released under other open source licenses. + * + * * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are * Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from * libpng-0.96, and are distributed according to the same disclaimer and @@ -56,6 +65,9 @@ * Glenn Randers-Pehrson * Willem van Schaik * + * Some files in the "scripts" directory have different copyright owners + * but are also released under this license. + * * libpng versions 0.89, June 1996, through 0.96, May 1997, are * Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88, * and are distributed according to the same disclaimer and license as @@ -69,6 +81,9 @@ * Greg Roelofs * Tom Tanner * + * Some files in the "scripts" directory have other copyright owners + * but are released under this license. + * * libpng versions 0.5, May 1995, through 0.88, January 1996, are * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. * @@ -201,6 +216,8 @@ * 1.2.56 13 10256 12.so.0.56[.0] * ... * 1.5.27 15 10527 15.so.15.27[.0] + * ... + * 1.6.23 16 10623 16.so.16.23[.0] * * Henceforth the source version will match the shared-library major * and minor numbers; the shared-library major version number will be @@ -228,29 +245,30 @@ * Y2K compliance in libpng: * ========================= * - * May 26, 2016 + * June 9, 2016 * * Since the PNG Development group is an ad-hoc body, we can't make * an official declaration. * * This is your unofficial assurance that libpng from version 0.71 and - * upward through 1.5.27 are Y2K compliant. It is my belief that + * upward through 1.6.23 are Y2K compliant. It is my belief that * earlier versions were also Y2K compliant. * * Libpng only has two year fields. One is a 2-byte unsigned integer - * that will hold years up to 65535. The other holds the date in text - * format, and will hold years up to 9999. + * that will hold years up to 65535. The other, which is deprecated, + * holds the date in text format, and will hold years up to 9999. * * The integer is * "png_uint_16 year" in png_time_struct. * * The string is - * "char time_buffer[29]" in png_struct. This will be no - * longer used in libpng-1.6.0 and will be removed from libpng-1.7.0. + * "char time_buffer[29]" in png_struct. This is no longer used + * in libpng-1.6.x and will be removed from libpng-1.7.0. * * There are seven time-related functions: - * png.c: png_convert_to_rfc_1123() in png.c - * (formerly png_convert_to_rfc_1152() in error) + * png.c: png_convert_to_rfc_1123_buffer() in png.c + * (formerly png_convert_to_rfc_1123() prior to libpng-1.5.x and + * png_convert_to_rfc_1152() in error prior to libpng-0.98) * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c * png_convert_from_time_t() in pngwrite.c * png_get_tIME() in pngget.c @@ -261,8 +279,8 @@ * All handle dates properly in a Y2K environment. The * png_convert_from_time_t() function calls gmtime() to convert from system * clock time, which returns (year - 1900), which we properly convert to - * the full 4-digit year. There is a possibility that applications using - * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() + * the full 4-digit year. There is a possibility that libpng applications + * are not passing 4-digit years into the png_convert_to_rfc_1123_buffer() * function, or that they are incorrectly passing only a 2-digit year * instead of "year - 1900" into the png_convert_from_struct_tm() function, * but this is not under our control. The libpng documentation has always @@ -295,17 +313,17 @@ */ /* Version information for png.h - this should match the version in png.c */ -#define PNG_LIBPNG_VER_STRING "1.5.27" +#define PNG_LIBPNG_VER_STRING "1.6.23" #define PNG_HEADER_VERSION_STRING \ - " libpng version 1.5.27 - May 26, 2016\n" + " libpng version 1.6.23 - June 9, 2016\n" -#define PNG_LIBPNG_VER_SONUM 15 -#define PNG_LIBPNG_VER_DLLNUM 15 +#define PNG_LIBPNG_VER_SONUM 16 +#define PNG_LIBPNG_VER_DLLNUM 16 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ #define PNG_LIBPNG_VER_MAJOR 1 -#define PNG_LIBPNG_VER_MINOR 5 -#define PNG_LIBPNG_VER_RELEASE 27 +#define PNG_LIBPNG_VER_MINOR 6 +#define PNG_LIBPNG_VER_RELEASE 23 /* This should match the numeric part of the final component of * PNG_LIBPNG_VER_STRING, omitting any leading zero: @@ -336,7 +354,7 @@ * version 1.0.0 was mis-numbered 100 instead of 10000). From * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release */ -#define PNG_LIBPNG_VER 10527 /* 1.5.27 */ +#define PNG_LIBPNG_VER 10623 /* 1.6.23 */ /* Library configuration: these options cannot be changed after * the library has been built. @@ -349,27 +367,9 @@ #endif #ifndef PNG_VERSION_INFO_ONLY -# ifndef PNG_BUILDING_SYMBOL_TABLE - /* - * Standard header files (not needed for the version info or while - * building symbol table -- see scripts/pnglibconf.dfa) - */ -# ifdef PNG_SETJMP_SUPPORTED -# include <setjmp.h> -# endif - - /* Need the time information for converting tIME chunks, it - * defines struct tm: - */ -# ifdef PNG_CONVERT_tIME_SUPPORTED - /* "time.h" functions are not supported on all operating systems */ -# include <time.h> -# endif -# endif - -/* Machine specific configuration. */ + /* Machine specific configuration. */ # include "pngconf.h" -#endif /* PNG_VERSION_INFO_ONLY */ +#endif /* * Added at libpng-1.2.8 @@ -411,16 +411,22 @@ extern "C" { /* This file is arranged in several sections: * - * 1. Any configuration options that can be specified by for the application + * 1. [omitted] + * 2. Any configuration options that can be specified by for the application * code when it is built. (Build time configuration is in pnglibconf.h) - * 2. Type definitions (base types are defined in pngconf.h), structure + * 3. Type definitions (base types are defined in pngconf.h), structure * definitions. - * 3. Exported library functions. + * 4. Exported library functions. + * 5. Simplified API. + * 6. Implementation options. * * The library source code has additional files (principally pngpriv.h) that * allow configuration of the library. */ -/* Section 1: run time configuration + +/* Section 1: [omitted] */ + +/* Section 2: run time configuration * See pnglibconf.h for build time configuration * * Run time configuration allows the application to choose between @@ -450,7 +456,7 @@ extern "C" { * Otherwise the calls are mapped to png_error. */ -/* Section 2: type definitions, including structures and compile time +/* Section 3: type definitions, including structures and compile time * constants. * See pngconf.h for base types that vary by machine/system */ @@ -458,7 +464,48 @@ extern "C" { /* This triggers a compiler error in png.c, if png.c and png.h * do not agree upon the version number. */ -typedef char* png_libpng_version_1_5_27; +typedef char* png_libpng_version_1_6_23; + +/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info. + * + * png_struct is the cache of information used while reading or writing a single + * PNG file. One of these is always required, although the simplified API + * (below) hides the creation and destruction of it. + */ +typedef struct png_struct_def png_struct; +typedef const png_struct * png_const_structp; +typedef png_struct * png_structp; +typedef png_struct * * png_structpp; + +/* png_info contains information read from or to be written to a PNG file. One + * or more of these must exist while reading or creating a PNG file. The + * information is not used by libpng during read but is used to control what + * gets written when a PNG file is created. "png_get_" function calls read + * information during read and "png_set_" functions calls write information + * when creating a PNG. + * been moved into a separate header file that is not accessible to + * applications. Read libpng-manual.txt or libpng.3 for more info. + */ +typedef struct png_info_def png_info; +typedef png_info * png_infop; +typedef const png_info * png_const_infop; +typedef png_info * * png_infopp; + +/* Types with names ending 'p' are pointer types. The corresponding types with + * names ending 'rp' are identical pointer types except that the pointer is + * marked 'restrict', which means that it is the only pointer to the object + * passed to the function. Applications should not use the 'restrict' types; + * it is always valid to pass 'p' to a pointer with a function argument of the + * corresponding 'rp' type. Different compilers have different rules with + * regard to type matching in the presence of 'restrict'. For backward + * compatibility libpng callbacks never have 'restrict' in their parameters and, + * consequentially, writing portable application code is extremely difficult if + * an attempt is made to use 'restrict'. + */ +typedef png_struct * PNG_RESTRICT png_structrp; +typedef const png_struct * PNG_RESTRICT png_const_structrp; +typedef png_info * PNG_RESTRICT png_inforp; +typedef const png_info * PNG_RESTRICT png_const_inforp; /* Three color definitions. The order of the red, green, and blue, (and the * exact size) is not important, although the size of the fields need to @@ -470,9 +517,9 @@ typedef struct png_color_struct png_byte green; png_byte blue; } png_color; -typedef png_color FAR * png_colorp; -typedef PNG_CONST png_color FAR * png_const_colorp; -typedef png_color FAR * FAR * png_colorpp; +typedef png_color * png_colorp; +typedef const png_color * png_const_colorp; +typedef png_color * * png_colorpp; typedef struct png_color_16_struct { @@ -482,9 +529,9 @@ typedef struct png_color_16_struct png_uint_16 blue; png_uint_16 gray; /* for use in grayscale files */ } png_color_16; -typedef png_color_16 FAR * png_color_16p; -typedef PNG_CONST png_color_16 FAR * png_const_color_16p; -typedef png_color_16 FAR * FAR * png_color_16pp; +typedef png_color_16 * png_color_16p; +typedef const png_color_16 * png_const_color_16p; +typedef png_color_16 * * png_color_16pp; typedef struct png_color_8_struct { @@ -494,9 +541,9 @@ typedef struct png_color_8_struct png_byte gray; /* for use in grayscale files */ png_byte alpha; /* for alpha channel files */ } png_color_8; -typedef png_color_8 FAR * png_color_8p; -typedef PNG_CONST png_color_8 FAR * png_const_color_8p; -typedef png_color_8 FAR * FAR * png_color_8pp; +typedef png_color_8 * png_color_8p; +typedef const png_color_8 * png_const_color_8p; +typedef png_color_8 * * png_color_8pp; /* * The following two structures are used for the in-core representation @@ -510,9 +557,9 @@ typedef struct png_sPLT_entry_struct png_uint_16 alpha; png_uint_16 frequency; } png_sPLT_entry; -typedef png_sPLT_entry FAR * png_sPLT_entryp; -typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; -typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; +typedef png_sPLT_entry * png_sPLT_entryp; +typedef const png_sPLT_entry * png_const_sPLT_entryp; +typedef png_sPLT_entry * * png_sPLT_entrypp; /* When the depth of the sPLT palette is 8 bits, the color and alpha samples * occupy the LSB of their respective members, and the MSB of each member @@ -526,9 +573,9 @@ typedef struct png_sPLT_struct png_sPLT_entryp entries; /* palette entries */ png_int_32 nentries; /* number of palette entries */ } png_sPLT_t; -typedef png_sPLT_t FAR * png_sPLT_tp; -typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; -typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; +typedef png_sPLT_t * png_sPLT_tp; +typedef const png_sPLT_t * png_const_sPLT_tp; +typedef png_sPLT_t * * png_sPLT_tpp; #ifdef PNG_TEXT_SUPPORTED /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, @@ -565,9 +612,9 @@ typedef struct png_text_struct png_charp lang_key; /* keyword translated UTF-8 string, 0 or more chars or a NULL pointer */ } png_text; -typedef png_text FAR * png_textp; -typedef PNG_CONST png_text FAR * png_const_textp; -typedef png_text FAR * FAR * png_textpp; +typedef png_text * png_textp; +typedef const png_text * png_const_textp; +typedef png_text * * png_textpp; #endif /* Supported compression types for text in PNG files (tEXt, and zTXt). @@ -595,49 +642,45 @@ typedef struct png_time_struct png_byte minute; /* minute of hour, 0 - 59 */ png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ } png_time; -typedef png_time FAR * png_timep; -typedef PNG_CONST png_time FAR * png_const_timep; -typedef png_time FAR * FAR * png_timepp; +typedef png_time * png_timep; +typedef const png_time * png_const_timep; +typedef png_time * * png_timepp; -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ - defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) +#if defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) ||\ + defined(PNG_USER_CHUNKS_SUPPORTED) /* png_unknown_chunk is a structure to hold queued chunks for which there is * no specific support. The idea is that we can use this to queue * up private chunks for output even though the library doesn't actually * know about their semantics. + * + * The data in the structure is set by libpng on read and used on write. */ typedef struct png_unknown_chunk_t { - png_byte name[5]; - png_byte *data; + png_byte name[5]; /* Textual chunk name with '\0' terminator */ + png_byte *data; /* Data, should not be modified on read! */ png_size_t size; - /* libpng-using applications should NOT directly modify this byte. */ + /* On write 'location' must be set using the flag values listed below. + * Notice that on read it is set by libpng however the values stored have + * more bits set than are listed below. Always treat the value as a + * bitmask. On write set only one bit - setting multiple bits may cause the + * chunk to be written in multiple places. + */ png_byte location; /* mode of operation at read time */ } - - png_unknown_chunk; -typedef png_unknown_chunk FAR * png_unknown_chunkp; -typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; -typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; -#endif -/* Values for the unknown chunk location byte */ +typedef png_unknown_chunk * png_unknown_chunkp; +typedef const png_unknown_chunk * png_const_unknown_chunkp; +typedef png_unknown_chunk * * png_unknown_chunkpp; +#endif +/* Flag values for the unknown chunk location byte. */ #define PNG_HAVE_IHDR 0x01 #define PNG_HAVE_PLTE 0x02 #define PNG_AFTER_IDAT 0x08 -/* The complete definition of png_info has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_info_def png_info; -typedef png_info FAR * png_infop; -typedef PNG_CONST png_info FAR * png_const_infop; -typedef png_info FAR * FAR * png_infopp; - /* Maximum positive integer used in PNG is (2^31)-1 */ #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) #define PNG_UINT_32_MAX ((png_uint_32)(-1)) @@ -753,16 +796,8 @@ typedef struct png_row_info_struct png_byte pixel_depth; /* bits per pixel (depth * channels) */ } png_row_info; -typedef png_row_info FAR * png_row_infop; -typedef png_row_info FAR * FAR * png_row_infopp; - -/* The complete definition of png_struct has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_struct_def png_struct; -typedef PNG_CONST png_struct FAR * png_const_structp; -typedef png_struct FAR * png_structp; +typedef png_row_info * png_row_infop; +typedef png_row_info * * png_row_infopp; /* These are the function types for the I/O functions and for the functions * that allow the user to override the default I/O functions with his or her @@ -809,7 +844,8 @@ typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, png_unknown_chunkp)); #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); +/* not used anywhere */ +/* typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); */ #endif #ifdef PNG_SETJMP_SUPPORTED @@ -848,7 +884,9 @@ PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef); #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ /* Added to libpng-1.5.4 */ #define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */ +#if INT_MAX >= 0x8000 /* else this might break */ #define PNG_TRANSFORM_SCALE_16 0x8000 /* read only */ +#endif /* Flags for MNG supported features */ #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 @@ -865,9 +903,7 @@ typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, png_alloc_size_t)); typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); -typedef png_struct FAR * FAR * png_structpp; - -/* Section 3: exported functions +/* Section 4: exported functions * Here are the function definitions most commonly used. This is not * the place to find out how to use libpng. See libpng-manual.txt for the * full explanation, see example.c for the summary. This just provides @@ -902,7 +938,7 @@ PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); /* Tell lib we have already handled the first <num_bytes> magic bytes. * Handling more than 8 bytes from the beginning of the file is an error. */ -PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); +PNG_EXPORT(2, void, png_set_sig_bytes, (png_structrp png_ptr, int num_bytes)); /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a * PNG file. Returns zero if the supplied bytes match the 8-byte PNG @@ -929,13 +965,11 @@ PNG_EXPORTA(5, png_structp, png_create_write_struct, png_error_ptr warn_fn), PNG_ALLOCATED); -#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); -PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, +PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structrp png_ptr, png_size_t size)); -#endif /* WRITE_CUSTOMIZE_COMPRESSION */ /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp * match up. @@ -948,10 +982,10 @@ PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, * allocated by the library - the call will return NULL on a mismatch * indicating an ABI mismatch. */ -PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, +PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structrp png_ptr, png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); # define png_jmpbuf(png_ptr) \ - (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) + (*png_set_longjmp_fn((png_ptr), longjmp, (sizeof (jmp_buf)))) #else # define png_jmpbuf(png_ptr) \ (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) @@ -961,12 +995,12 @@ PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, * will use it; otherwise it will call PNG_ABORT(). This function was * added in libpng-1.5.0. */ -PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), +PNG_EXPORTA(9, void, png_longjmp, (png_const_structrp png_ptr, int val), PNG_NORETURN); #ifdef PNG_READ_SUPPORTED /* Reset the compression stream */ -PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); +PNG_EXPORTA(10, int, png_reset_zstream, (png_structrp png_ptr), PNG_DEPRECATED); #endif /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ @@ -984,81 +1018,92 @@ PNG_EXPORTA(12, png_structp, png_create_write_struct_2, #endif /* Write the PNG file signature. */ -PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); +PNG_EXPORT(13, void, png_write_sig, (png_structrp png_ptr)); /* Write a PNG chunk - size, type, (optional) data, CRC. */ -PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep +PNG_EXPORT(14, void, png_write_chunk, (png_structrp png_ptr, png_const_bytep chunk_name, png_const_bytep data, png_size_t length)); /* Write the start of a PNG chunk - length and chunk name. */ -PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, +PNG_EXPORT(15, void, png_write_chunk_start, (png_structrp png_ptr, png_const_bytep chunk_name, png_uint_32 length)); /* Write the data of a PNG chunk started with png_write_chunk_start(). */ -PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, +PNG_EXPORT(16, void, png_write_chunk_data, (png_structrp png_ptr, png_const_bytep data, png_size_t length)); /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); +PNG_EXPORT(17, void, png_write_chunk_end, (png_structrp png_ptr)); /* Allocate and initialize the info structure */ -PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), +PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_const_structrp png_ptr), PNG_ALLOCATED); -PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, - png_size_t png_info_struct_size)); +/* DEPRECATED: this function allowed init structures to be created using the + * default allocation method (typically malloc). Use is deprecated in 1.6.0 and + * the API will be removed in the future. + */ +PNG_EXPORTA(19, void, png_info_init_3, (png_infopp info_ptr, + png_size_t png_info_struct_size), PNG_DEPRECATED); /* Writes all the PNG information before the image. */ PNG_EXPORT(20, void, png_write_info_before_PLTE, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(21, void, png_write_info, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_const_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the information before the actual image data. */ PNG_EXPORT(22, void, png_read_info, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_inforp info_ptr)); #endif #ifdef PNG_TIME_RFC1123_SUPPORTED -PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, - (png_structp png_ptr, + /* Convert to a US string format: there is no localization support in this + * routine. The original implementation used a 29 character buffer in + * png_struct, this will be removed in future versions. + */ +#if PNG_LIBPNG_VER < 10700 +/* To do: remove this from libpng17 (and from libpng17/png.c and pngstruct.h) */ +PNG_EXPORTA(23, png_const_charp, png_convert_to_rfc1123, (png_structrp png_ptr, + png_const_timep ptime),PNG_DEPRECATED); +#endif +PNG_EXPORT(241, int, png_convert_to_rfc1123_buffer, (char out[29], png_const_timep ptime)); #endif #ifdef PNG_CONVERT_tIME_SUPPORTED /* Convert from a struct tm to png_time */ PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, - PNG_CONST struct tm FAR * ttime)); + const struct tm * ttime)); /* Convert from time_t to png_time. Uses gmtime() */ -PNG_EXPORT(25, void, png_convert_from_time_t, - (png_timep ptime, time_t ttime)); -#endif /* PNG_CONVERT_tIME_SUPPORTED */ +PNG_EXPORT(25, void, png_convert_from_time_t, (png_timep ptime, time_t ttime)); +#endif /* CONVERT_tIME */ #ifdef PNG_READ_EXPAND_SUPPORTED /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ -PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); -PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); -PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); -PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); +PNG_EXPORT(26, void, png_set_expand, (png_structrp png_ptr)); +PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structrp png_ptr)); +PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structrp png_ptr)); +PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structrp png_ptr)); #endif #ifdef PNG_READ_EXPAND_16_SUPPORTED /* Expand to 16-bit channels, forces conversion of palette to RGB and expansion * of a tRNS chunk if present. */ -PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); +PNG_EXPORT(221, void, png_set_expand_16, (png_structrp png_ptr)); #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) /* Use blue, green, red order for pixels. */ -PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); +PNG_EXPORT(30, void, png_set_bgr, (png_structrp png_ptr)); #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand the grayscale to 24-bit RGB if necessary. */ -PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); +PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structrp png_ptr)); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED @@ -1068,12 +1113,12 @@ PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); #define PNG_ERROR_ACTION_ERROR 3 #define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ -PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, +PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structrp png_ptr, int error_action, double red, double green)) -PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, +PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structrp png_ptr, int error_action, png_fixed_point red, png_fixed_point green)) -PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp +PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structrp png_ptr)); #endif @@ -1083,9 +1128,9 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, #endif #ifdef PNG_READ_ALPHA_MODE_SUPPORTED -/* How the alpha channel is interpreted - this affects how the color channels of - * a PNG file are returned when an alpha channel, or tRNS chunk in a palette - * file, is present. +/* How the alpha channel is interpreted - this affects how the color channels + * of a PNG file are returned to the calling application when an alpha channel, + * or a tRNS chunk in a palette file, is present. * * This has no effect on the way pixels are written into a PNG output * datastream. The color samples in a PNG datastream are never premultiplied @@ -1093,33 +1138,19 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, * * The default is to return data according to the PNG specification: the alpha * channel is a linear measure of the contribution of the pixel to the - * corresponding composited pixel. The gamma encoded color channels must be - * scaled according to the contribution and to do this it is necessary to undo + * corresponding composited pixel, and the color channels are unassociated + * (not premultiplied). The gamma encoded color channels must be scaled + * according to the contribution and to do this it is necessary to undo * the encoding, scale the color values, perform the composition and reencode * the values. This is the 'PNG' mode. * * The alternative is to 'associate' the alpha with the color information by - * storing color channel values that have been scaled by the alpha. The - * advantage is that the color channels can be resampled (the image can be - * scaled) in this form. The disadvantage is that normal practice is to store - * linear, not (gamma) encoded, values and this requires 16-bit channels for - * still images rather than the 8-bit channels that are just about sufficient if - * gamma encoding is used. In addition all non-transparent pixel values, - * including completely opaque ones, must be gamma encoded to produce the final - * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the - * latter being the two common names for associated alpha color channels.) - * - * Since it is not necessary to perform arithmetic on opaque color values so - * long as they are not to be resampled and are in the final color space it is - * possible to optimize the handling of alpha by storing the opaque pixels in - * the PNG format (adjusted for the output color space) while storing partially - * opaque pixels in the standard, linear, format. The accuracy required for - * standard alpha composition is relatively low, because the pixels are - * isolated, therefore typically the accuracy loss in storing 8-bit linear - * values is acceptable. (This is not true if the alpha channel is used to - * simulate transparency over large areas - use 16 bits or the PNG mode in - * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is - * treated as opaque only if the alpha value is equal to the maximum value. + * storing color channel values that have been scaled by the alpha. + * image. These are the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' modes + * (the latter being the two common names for associated alpha color channels). + * + * For the 'OPTIMIZED' mode, a pixel is treated as opaque only if the alpha + * value is equal to the maximum value. * * The final choice is to gamma encode the alpha channel as well. This is * broken because, in practice, no implementation that uses this choice @@ -1138,76 +1169,15 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, #define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ #define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ -PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, +PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structrp png_ptr, int mode, double output_gamma)) -PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, +PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structrp png_ptr, int mode, png_fixed_point output_gamma)) #endif -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) +#if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) /* The output_gamma value is a screen gamma in libpng terminology: it expresses - * how to decode the output values, not how they are encoded. The values used - * correspond to the normal numbers used to describe the overall gamma of a - * computer display system; for example 2.2 for an sRGB conformant system. The - * values are scaled by 100000 in the _fixed version of the API (so 220000 for - * sRGB.) - * - * The inverse of the value is always used to provide a default for the PNG file - * encoding if it has no gAMA chunk and if png_set_gamma() has not been called - * to override the PNG gamma information. - * - * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode - * opaque pixels however pixels with lower alpha values are not encoded, - * regardless of the output gamma setting. - * - * When the standard Porter Duff handling is requested with mode 1 the output - * encoding is set to be linear and the output_gamma value is only relevant - * as a default for input data that has no gamma information. The linear output - * encoding will be overridden if png_set_gamma() is called - the results may be - * highly unexpected! - * - * The following numbers are derived from the sRGB standard and the research - * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of - * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing - * correction required to take account of any differences in the color - * environment of the original scene and the intended display environment; the - * value expresses how to *decode* the image for display, not how the original - * data was *encoded*. - * - * sRGB provides a peg for the PNG standard by defining a viewing environment. - * sRGB itself, and earlier TV standards, actually use a more complex transform - * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is - * limited to simple power laws.) By saying that an image for direct display on - * an sRGB conformant system should be stored with a gAMA chunk value of 45455 - * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification - * makes it possible to derive values for other display systems and - * environments. - * - * The Mac value is deduced from the sRGB based on an assumption that the actual - * extra viewing correction used in early Mac display systems was implemented as - * a power 1.45 lookup table. - * - * Any system where a programmable lookup table is used or where the behavior of - * the final display device characteristics can be changed requires system - * specific code to obtain the current characteristic. However this can be - * difficult and most PNG gamma correction only requires an approximate value. - * - * By default, if png_set_alpha_mode() is not called, libpng assumes that all - * values are unencoded, linear, values and that the output device also has a - * linear characteristic. This is only very rarely correct - it is invariably - * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the - * default if you don't know what the right answer is! - * - * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS - * 10.6) which used a correction table to implement a somewhat lower gamma on an - * otherwise sRGB system. - * - * Both these values are reserved (not simple gamma values) in order to allow - * more precise correction internally in the future. - * - * NOTE: the following values can be passed to either the fixed or floating - * point APIs, but the floating point API will also accept floating point - * values. + * how to decode the output values, not how they are encoded. */ #define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ #define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ @@ -1292,51 +1262,50 @@ PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, */ #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED -PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); +PNG_EXPORT(36, void, png_set_strip_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); +PNG_EXPORT(37, void, png_set_swap_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); +PNG_EXPORT(38, void, png_set_invert_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, +/* Add a filler byte to 8-bit or 16-bit Gray or 24-bit or 48-bit RGB images. */ +PNG_EXPORT(39, void, png_set_filler, (png_structrp png_ptr, png_uint_32 filler, int flags)); /* The values of the PNG_FILLER_ defines should NOT be changed */ # define PNG_FILLER_BEFORE 0 # define PNG_FILLER_AFTER 1 -/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(40, void, png_set_add_alpha, - (png_structp png_ptr, png_uint_32 filler, - int flags)); -#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ +/* Add an alpha byte to 8-bit or 16-bit Gray or 24-bit or 48-bit RGB images. */ +PNG_EXPORT(40, void, png_set_add_alpha, (png_structrp png_ptr, + png_uint_32 filler, int flags)); +#endif /* READ_FILLER || WRITE_FILLER */ #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) /* Swap bytes in 16-bit depth files. */ -PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); +PNG_EXPORT(41, void, png_set_swap, (png_structrp png_ptr)); #endif #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ -PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); +PNG_EXPORT(42, void, png_set_packing, (png_structrp png_ptr)); #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) /* Swap packing order of pixels in bytes. */ -PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); +PNG_EXPORT(43, void, png_set_packswap, (png_structrp png_ptr)); #endif #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) /* Converts files to legal bit depths. */ -PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p +PNG_EXPORT(44, void, png_set_shift, (png_structrp png_ptr, png_const_color_8p true_bits)); #endif @@ -1348,12 +1317,12 @@ PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p * necessary to call png_read_row or png_read_rows png_get_image_height * times for each pass. */ -PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); +PNG_EXPORT(45, int, png_set_interlace_handling, (png_structrp png_ptr)); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) /* Invert monochrome files */ -PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); +PNG_EXPORT(46, void, png_set_invert_mono, (png_structrp png_ptr)); #endif #ifdef PNG_READ_BACKGROUND_SUPPORTED @@ -1362,10 +1331,10 @@ PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); * read. Doing so will result in unexpected behavior and possible warnings or * errors if the PNG file contains a bKGD chunk. */ -PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, +PNG_FP_EXPORT(47, void, png_set_background, (png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, int need_expand, double background_gamma)) -PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, +PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, int need_expand, png_fixed_point background_gamma)) #endif @@ -1378,23 +1347,22 @@ PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* Scale a 16-bit depth file down to 8-bit, accurately. */ -PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); +PNG_EXPORT(229, void, png_set_scale_16, (png_structrp png_ptr)); #endif #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED #define PNG_READ_16_TO_8_SUPPORTED /* Name prior to 1.5.4 */ /* Strip the second byte of information from a 16-bit depth file. */ -PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); +PNG_EXPORT(48, void, png_set_strip_16, (png_structrp png_ptr)); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED /* Turn on quantizing, and reduce the palette to the number of colors * available. */ -PNG_EXPORT(49, void, png_set_quantize, - (png_structp png_ptr, png_colorp palette, - int num_palette, int maximum_colors, png_const_uint_16p histogram, - int full_quantize)); +PNG_EXPORT(49, void, png_set_quantize, (png_structrp png_ptr, + png_colorp palette, int num_palette, int maximum_colors, + png_const_uint_16p histogram, int full_quantize)); #endif #ifdef PNG_READ_GAMMA_SUPPORTED @@ -1414,71 +1382,69 @@ PNG_EXPORT(49, void, png_set_quantize, * API (floating point or fixed.) Notice, however, that the 'file_gamma' value * is the inverse of a 'screen gamma' value. */ -PNG_FP_EXPORT(50, void, png_set_gamma, - (png_structp png_ptr, double screen_gamma, - double override_file_gamma)) -PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, +PNG_FP_EXPORT(50, void, png_set_gamma, (png_structrp png_ptr, + double screen_gamma, double override_file_gamma)) +PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structrp png_ptr, png_fixed_point screen_gamma, png_fixed_point override_file_gamma)) #endif #ifdef PNG_WRITE_FLUSH_SUPPORTED /* Set how many lines between output flushes - 0 for no flushing */ -PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); +PNG_EXPORT(51, void, png_set_flush, (png_structrp png_ptr, int nrows)); /* Flush the current PNG output buffer */ -PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); +PNG_EXPORT(52, void, png_write_flush, (png_structrp png_ptr)); #endif /* Optional update palette with requested transformations */ -PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); +PNG_EXPORT(53, void, png_start_read_image, (png_structrp png_ptr)); /* Optional call to update the users info structure */ -PNG_EXPORT(54, void, png_read_update_info, - (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(54, void, png_read_update_info, (png_structrp png_ptr, + png_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read one or more rows of image data. */ -PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, +PNG_EXPORT(55, void, png_read_rows, (png_structrp png_ptr, png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read a row of data. */ -PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, +PNG_EXPORT(56, void, png_read_row, (png_structrp png_ptr, png_bytep row, png_bytep display_row)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the whole image into memory at once. */ -PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); +PNG_EXPORT(57, void, png_read_image, (png_structrp png_ptr, png_bytepp image)); #endif /* Write a row of image data */ -PNG_EXPORT(58, void, png_write_row, - (png_structp png_ptr, png_const_bytep row)); +PNG_EXPORT(58, void, png_write_row, (png_structrp png_ptr, + png_const_bytep row)); /* Write a few rows of image data: (*row) is not written; however, the type * is declared as writeable to maintain compatibility with previous versions * of libpng and to allow the 'display_row' array from read_rows to be passed * unchanged to write_rows. */ -PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, +PNG_EXPORT(59, void, png_write_rows, (png_structrp png_ptr, png_bytepp row, png_uint_32 num_rows)); /* Write the image data */ -PNG_EXPORT(60, void, png_write_image, - (png_structp png_ptr, png_bytepp image)); +PNG_EXPORT(60, void, png_write_image, (png_structrp png_ptr, png_bytepp image)); /* Write the end of the PNG file. */ -PNG_EXPORT(61, void, png_write_end, - (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(61, void, png_write_end, (png_structrp png_ptr, + png_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the end of the PNG file. */ -PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(62, void, png_read_end, (png_structrp png_ptr, png_inforp info_ptr)); #endif /* Free any memory associated with the png_info_struct */ -PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, +PNG_EXPORT(63, void, png_destroy_info_struct, (png_const_structrp png_ptr, png_infopp info_ptr_ptr)); /* Free any memory associated with the png_struct and the png_info_structs */ @@ -1490,8 +1456,8 @@ PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); /* Set the libpng method of handling chunk CRC errors */ -PNG_EXPORT(66, void, png_set_crc_action, - (png_structp png_ptr, int crit_action, int ancil_action)); +PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action, + int ancil_action)); /* Values for png_set_crc_action() say how to handle CRC errors in * ancillary and critical chunks, and whether to use the data contained @@ -1509,6 +1475,7 @@ PNG_EXPORT(66, void, png_set_crc_action, #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ +#ifdef PNG_WRITE_SUPPORTED /* These functions give the user control over the scan-line filtering in * libpng and the compression methods used by zlib. These functions are * mainly useful for testing, as the defaults should work with most users. @@ -1520,8 +1487,9 @@ PNG_EXPORT(66, void, png_set_crc_action, /* Set the filtering method(s) used by libpng. Currently, the only valid * value for "method" is 0. */ -PNG_EXPORT(67, void, png_set_filter, - (png_structp png_ptr, int method, int filters)); +PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method, + int filters)); +#endif /* WRITE */ /* Flags for png_set_filter() to say which filters to use. The flags * are chosen so that they don't conflict with real filter types @@ -1547,15 +1515,16 @@ PNG_EXPORT(67, void, png_set_filter, #define PNG_FILTER_VALUE_PAETH 4 #define PNG_FILTER_VALUE_LAST 5 +#ifdef PNG_WRITE_SUPPORTED #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */ -PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, +PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr, int heuristic_method, int num_weights, png_const_doublep filter_weights, png_const_doublep filter_costs)) PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, - (png_structp png_ptr, - int heuristic_method, int num_weights, png_const_fixed_point_p - filter_weights, png_const_fixed_point_p filter_costs)) -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ + (png_structrp png_ptr, int heuristic_method, int num_weights, + png_const_fixed_point_p filter_weights, + png_const_fixed_point_p filter_costs)) +#endif /* WRITE_WEIGHTED_FILTER */ /* The following are no longer used and will be removed from libpng-1.7: */ #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ @@ -1563,7 +1532,6 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ -#ifdef PNG_WRITE_SUPPORTED /* Set the library compression level. Currently, valid values range from * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 * (0 - no compression, 9 - "maximal" compression). Note that tests have @@ -1572,45 +1540,45 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, * these values may not correspond directly to the zlib compression levels. */ #ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED -PNG_EXPORT(69, void, png_set_compression_level, - (png_structp png_ptr, int level)); +PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr, + int level)); -PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, +PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structrp png_ptr, int mem_level)); -PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, +PNG_EXPORT(71, void, png_set_compression_strategy, (png_structrp png_ptr, int strategy)); /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ -PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, +PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr, int window_bits)); -PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, +PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr, int method)); #endif /* WRITE_CUSTOMIZE_COMPRESSION */ #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED /* Also set zlib parameters for compressing non-IDAT chunks */ -PNG_EXPORT(222, void, png_set_text_compression_level, - (png_structp png_ptr, int level)); +PNG_EXPORT(222, void, png_set_text_compression_level, (png_structrp png_ptr, + int level)); -PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, +PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structrp png_ptr, int mem_level)); -PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, +PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structrp png_ptr, int strategy)); /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ -PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp - png_ptr, int window_bits)); +PNG_EXPORT(225, void, png_set_text_compression_window_bits, + (png_structrp png_ptr, int window_bits)); -PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, +PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr, int method)); -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ +#endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */ #endif /* WRITE */ /* These next functions are called for input/output, memory, and error @@ -1624,7 +1592,7 @@ PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, #ifdef PNG_STDIO_SUPPORTED /* Initialize the input/output for the PNG file to the default functions. */ -PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); +PNG_EXPORT(74, void, png_init_io, (png_structrp png_ptr, png_FILE_p fp)); #endif /* Replace the (error and abort), and warning functions with user @@ -1635,12 +1603,11 @@ PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); * default function will be used. */ -PNG_EXPORT(75, void, png_set_error_fn, - (png_structp png_ptr, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warning_fn)); +PNG_EXPORT(75, void, png_set_error_fn, (png_structrp png_ptr, + png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); /* Return the user pointer associated with the error functions */ -PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structrp png_ptr)); /* Replace the default data output functions with a user supplied one(s). * If buffered output is not used, then output_flush_fn can be set to NULL. @@ -1652,47 +1619,47 @@ PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); * default flush function, which uses the standard *FILE structure, will * be used. */ -PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, +PNG_EXPORT(77, void, png_set_write_fn, (png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); /* Replace the default data input function with a user supplied one. */ -PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, +PNG_EXPORT(78, void, png_set_read_fn, (png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn)); /* Return the user pointer associated with the I/O functions */ -PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); +PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_const_structrp png_ptr)); -PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, +PNG_EXPORT(80, void, png_set_read_status_fn, (png_structrp png_ptr, png_read_status_ptr read_row_fn)); -PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, +PNG_EXPORT(81, void, png_set_write_status_fn, (png_structrp png_ptr, png_write_status_ptr write_row_fn)); #ifdef PNG_USER_MEM_SUPPORTED /* Replace the default memory allocation functions with user supplied one(s). */ -PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, +PNG_EXPORT(82, void, png_set_mem_fn, (png_structrp png_ptr, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); /* Return the user pointer associated with the memory functions */ -PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structrp png_ptr)); #endif #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, +PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structrp png_ptr, png_user_transform_ptr read_user_transform_fn)); #endif #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, +PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structrp png_ptr, png_user_transform_ptr write_user_transform_fn)); #endif #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED -PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, +PNG_EXPORT(86, void, png_set_user_transform_info, (png_structrp png_ptr, png_voidp user_transform_ptr, int user_transform_depth, int user_transform_channels)); /* Return the user pointer associated with the user transform functions */ PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #endif #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED @@ -1707,31 +1674,53 @@ PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, * find the output pixel (x,y) given an interlaced sub-image pixel * (row,col,pass). (See below for these macros.) */ -PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); -PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); +PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structrp)); +PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structrp)); #endif -#ifdef PNG_USER_CHUNKS_SUPPORTED -PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED +/* This callback is called only for *unknown* chunks. If + * PNG_HANDLE_AS_UNKNOWN_SUPPORTED is set then it is possible to set known + * chunks to be treated as unknown, however in this case the callback must do + * any processing required by the chunk (e.g. by calling the appropriate + * png_set_ APIs.) + * + * There is no write support - on write, by default, all the chunks in the + * 'unknown' list are written in the specified position. + * + * The integer return from the callback function is interpreted thus: + * + * negative: An error occurred; png_chunk_error will be called. + * zero: The chunk was not handled, the chunk will be saved. A critical + * chunk will cause an error at this point unless it is to be saved. + * positive: The chunk was handled, libpng will ignore/discard it. + * + * See "INTERACTION WTIH USER CHUNK CALLBACKS" below for important notes about + * how this behavior will change in libpng 1.7 + */ +PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structrp png_ptr, png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); -PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED +PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structrp png_ptr)); #endif #ifdef PNG_PROGRESSIVE_READ_SUPPORTED /* Sets the function callbacks for the push reader, and a pointer to a * user-defined structure available to the callback functions. */ -PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, +PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structrp png_ptr, png_voidp progressive_ptr, png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); /* Returns the user pointer associated with the push read functions */ -PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, + (png_const_structrp png_ptr)); /* Function to be called when data becomes available */ -PNG_EXPORT(92, void, png_process_data, - (png_structp png_ptr, png_infop info_ptr, - png_bytep buffer, png_size_t buffer_size)); +PNG_EXPORT(92, void, png_process_data, (png_structrp png_ptr, + png_inforp info_ptr, png_bytep buffer, png_size_t buffer_size)); /* A function which may be called *only* within png_process_data to stop the * processing of any more data. The function returns the number of bytes @@ -1740,7 +1729,7 @@ PNG_EXPORT(92, void, png_process_data, * 'save' is set to true the routine will first save all the pending data and * will always return 0. */ -PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); +PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save)); /* A function which may be called *only* outside (after) a call to * png_process_data. It returns the number of bytes of data to skip in the @@ -1748,92 +1737,95 @@ PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); * application must skip than number of bytes of input data and pass the * following data to the next call to png_process_data. */ -PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); +PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp)); -#ifdef PNG_READ_INTERLACING_SUPPORTED /* Function that combines rows. 'new_row' is a flag that should come from * the callback and be non-NULL if anything needs to be done; the library * stores its own version of the new data internally and ignores the passed * in value. */ -PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, +PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr, png_bytep old_row, png_const_bytep new_row)); -#endif /* PNG_READ_INTERLACING_SUPPORTED */ -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ +#endif /* PROGRESSIVE_READ */ -PNG_EXPORTA(94, png_voidp, png_malloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); +PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); /* Added at libpng version 1.4.0 */ -PNG_EXPORTA(95, png_voidp, png_calloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); +PNG_EXPORTA(95, png_voidp, png_calloc, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); /* Added at libpng version 1.2.4 */ -PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, +PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_const_structrp png_ptr, png_alloc_size_t size), PNG_ALLOCATED); /* Frees a pointer allocated by png_malloc() */ -PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); +PNG_EXPORT(97, void, png_free, (png_const_structrp png_ptr, png_voidp ptr)); /* Free data that was allocated internally */ -PNG_EXPORT(98, void, png_free_data, - (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); +PNG_EXPORT(98, void, png_free_data, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 free_me, int num)); /* Reassign responsibility for freeing existing data, whether allocated - * by libpng or by the application */ -PNG_EXPORT(99, void, png_data_freer, - (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); + * by libpng or by the application; this works on the png_info structure passed + * in, it does not change the state for other png_info structures. + * + * It is unlikely that this function works correctly as of 1.6.0 and using it + * may result either in memory leaks or double free of allocated data. + */ +PNG_EXPORT(99, void, png_data_freer, (png_const_structrp png_ptr, + png_inforp info_ptr, int freer, png_uint_32 mask)); /* Assignments for png_data_freer */ #define PNG_DESTROY_WILL_FREE_DATA 1 #define PNG_SET_WILL_FREE_DATA 1 #define PNG_USER_WILL_FREE_DATA 2 /* Flags for png_ptr->free_me and info_ptr->free_me */ -#define PNG_FREE_HIST 0x0008 -#define PNG_FREE_ICCP 0x0010 -#define PNG_FREE_SPLT 0x0020 -#define PNG_FREE_ROWS 0x0040 -#define PNG_FREE_PCAL 0x0080 -#define PNG_FREE_SCAL 0x0100 -#define PNG_FREE_UNKN 0x0200 -#define PNG_FREE_LIST 0x0400 -#define PNG_FREE_PLTE 0x1000 -#define PNG_FREE_TRNS 0x2000 -#define PNG_FREE_TEXT 0x4000 -#define PNG_FREE_ALL 0x7fff -#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ +#define PNG_FREE_HIST 0x0008U +#define PNG_FREE_ICCP 0x0010U +#define PNG_FREE_SPLT 0x0020U +#define PNG_FREE_ROWS 0x0040U +#define PNG_FREE_PCAL 0x0080U +#define PNG_FREE_SCAL 0x0100U +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED +# define PNG_FREE_UNKN 0x0200U +#endif +/* PNG_FREE_LIST 0x0400U removed in 1.6.0 because it is ignored */ +#define PNG_FREE_PLTE 0x1000U +#define PNG_FREE_TRNS 0x2000U +#define PNG_FREE_TEXT 0x4000U +#define PNG_FREE_ALL 0x7fffU +#define PNG_FREE_MUL 0x4220U /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ #ifdef PNG_USER_MEM_SUPPORTED -PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, - png_alloc_size_t size), PNG_ALLOCATED); -PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); +PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED PNG_DEPRECATED); +PNG_EXPORTA(101, void, png_free_default, (png_const_structrp png_ptr, + png_voidp ptr), PNG_DEPRECATED); #endif #ifdef PNG_ERROR_TEXT_SUPPORTED /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(102, void, png_error, - (png_structp png_ptr, png_const_charp error_message), - PNG_NORETURN); +PNG_EXPORTA(102, void, png_error, (png_const_structrp png_ptr, + png_const_charp error_message), PNG_NORETURN); /* The same, but the chunk name is prepended to the error string. */ -PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, +PNG_EXPORTA(103, void, png_chunk_error, (png_const_structrp png_ptr, png_const_charp error_message), PNG_NORETURN); #else /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); +PNG_EXPORTA(104, void, png_err, (png_const_structrp png_ptr), PNG_NORETURN); # define png_error(s1,s2) png_err(s1) # define png_chunk_error(s1,s2) png_err(s1) #endif #ifdef PNG_WARNINGS_SUPPORTED /* Non-fatal error in libpng. Can continue, but may have a problem. */ -PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, +PNG_EXPORT(105, void, png_warning, (png_const_structrp png_ptr, png_const_charp warning_message)); /* Non-fatal error in libpng, chunk name is prepended to message. */ -PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, +PNG_EXPORT(106, void, png_chunk_warning, (png_const_structrp png_ptr, png_const_charp warning_message)); #else # define png_warning(s1,s2) ((void)(s1)) @@ -1843,17 +1835,17 @@ PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, #ifdef PNG_BENIGN_ERRORS_SUPPORTED /* Benign error in libpng. Can continue, but may have a problem. * User can choose whether to handle as a fatal error or as a warning. */ -# undef png_benign_error -PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, +PNG_EXPORT(107, void, png_benign_error, (png_const_structrp png_ptr, png_const_charp warning_message)); -/* Same, chunk name is prepended to message. */ -# undef png_chunk_benign_error -PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, +#ifdef PNG_READ_SUPPORTED +/* Same, chunk name is prepended to message (only during read) */ +PNG_EXPORT(108, void, png_chunk_benign_error, (png_const_structrp png_ptr, png_const_charp warning_message)); +#endif PNG_EXPORT(109, void, png_set_benign_errors, - (png_structp png_ptr, int allowed)); + (png_structrp png_ptr, int allowed)); #else # ifdef PNG_ALLOW_BENIGN_ERRORS # define png_benign_error png_warning @@ -1877,121 +1869,119 @@ PNG_EXPORT(109, void, png_set_benign_errors, * png_info_struct. */ /* Returns "flag" if chunk data is valid in info_ptr. */ -PNG_EXPORT(110, png_uint_32, png_get_valid, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 flag)); +PNG_EXPORT(110, png_uint_32, png_get_valid, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 flag)); /* Returns number of bytes needed to hold a transformed row. */ -PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* Returns row_pointers, which is an array of pointers to scanlines that was * returned from png_read_png(). */ -PNG_EXPORT(112, png_bytepp, png_get_rows, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(112, png_bytepp, png_get_rows, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); + /* Set row_pointers, which is an array of pointers to scanlines for use * by png_write_png(). */ -PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, - png_infop info_ptr, png_bytepp row_pointers)); +PNG_EXPORT(113, void, png_set_rows, (png_const_structrp png_ptr, + png_inforp info_ptr, png_bytepp row_pointers)); #endif /* Returns number of color channels in image. */ -PNG_EXPORT(114, png_byte, png_get_channels, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(114, png_byte, png_get_channels, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); #ifdef PNG_EASY_ACCESS_SUPPORTED /* Returns image width in pixels. */ -PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image height in pixels. */ -PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image bit_depth. */ -PNG_EXPORT(117, png_byte, png_get_bit_depth, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(117, png_byte, png_get_bit_depth, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image color_type. */ -PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image filter_type. */ -PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image interlace_type. */ -PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image compression_type. */ -PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image resolution in pixels per meter, from pHYs chunk data. */ PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); /* Returns pixel aspect ratio, computed from pHYs chunk data. */ PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, - (png_const_structp png_ptr, png_const_infop info_ptr)) + (png_const_structrp png_ptr, png_const_inforp info_ptr)) PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr)) + (png_const_structrp png_ptr, png_const_inforp info_ptr)) /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); -#endif /* PNG_EASY_ACCESS_SUPPORTED */ +#endif /* EASY_ACCESS */ +#ifdef PNG_READ_SUPPORTED /* Returns pointer to signature string read from PNG header */ -PNG_EXPORT(130, png_const_bytep, png_get_signature, - (png_const_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(130, png_const_bytep, png_get_signature, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); +#endif #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(131, png_uint_32, png_get_bKGD, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_16p *background)); +PNG_EXPORT(131, png_uint_32, png_get_bKGD, (png_const_structrp png_ptr, + png_inforp info_ptr, png_color_16p *background)); #endif #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, - png_const_color_16p background)); +PNG_EXPORT(132, void, png_set_bKGD, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_color_16p background)); #endif #ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, - png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, +PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *white_x, double *white_y, double *red_x, double *red_y, double *green_x, double *green_y, double *blue_x, double *blue_y)) -PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, - png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, +PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z, double *green_X, double *green_Y, double *green_Z, double *blue_X, double *blue_Y, double *blue_Z)) -#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, - (png_const_structp png_ptr, - png_const_infop info_ptr, png_fixed_point *int_white_x, - png_fixed_point *int_white_y, png_fixed_point *int_red_x, - png_fixed_point *int_red_y, png_fixed_point *int_green_x, - png_fixed_point *int_green_y, png_fixed_point *int_blue_x, - png_fixed_point *int_blue_y)) -#endif + (png_const_structrp png_ptr, png_const_inforp info_ptr, + png_fixed_point *int_white_x, png_fixed_point *int_white_y, + png_fixed_point *int_red_x, png_fixed_point *int_red_y, + png_fixed_point *int_green_x, png_fixed_point *int_green_y, + png_fixed_point *int_blue_x, png_fixed_point *int_blue_y)) PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, - (png_structp png_ptr, png_const_infop info_ptr, + (png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *int_red_X, png_fixed_point *int_red_Y, png_fixed_point *int_red_Z, png_fixed_point *int_green_X, png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, @@ -2000,22 +1990,22 @@ PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, #endif #ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(135, void, png_set_cHRM, - (png_structp png_ptr, png_infop info_ptr, +PNG_FP_EXPORT(135, void, png_set_cHRM, (png_const_structrp png_ptr, + png_inforp info_ptr, double white_x, double white_y, double red_x, double red_y, double green_x, double green_y, double blue_x, double blue_y)) -PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, - png_infop info_ptr, double red_X, double red_Y, double red_Z, +PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_const_structrp png_ptr, + png_inforp info_ptr, double red_X, double red_Y, double red_Z, double green_X, double green_Y, double green_Z, double blue_X, double blue_Y, double blue_Z)) -PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_white_x, +PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, png_fixed_point int_blue_y)) -PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, +PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, png_fixed_point int_red_Z, png_fixed_point int_green_X, png_fixed_point int_green_Y, png_fixed_point int_green_Z, png_fixed_point int_blue_X, png_fixed_point int_blue_Y, @@ -2023,143 +2013,130 @@ PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, #endif #ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, - (png_const_structp png_ptr, png_const_infop info_ptr, - double *file_gamma)) +PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *file_gamma)) PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr, + (png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *int_file_gamma)) #endif #ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, - png_infop info_ptr, double file_gamma)) -PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_file_gamma)) +PNG_FP_EXPORT(139, void, png_set_gAMA, (png_const_structrp png_ptr, + png_inforp info_ptr, double file_gamma)) +PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_file_gamma)) #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(141, png_uint_32, png_get_hIST, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_16p *hist)); +PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_16p *hist)); #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, - png_infop info_ptr, png_const_uint_16p hist)); +PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_uint_16p hist)); #endif -PNG_EXPORT(143, png_uint_32, png_get_IHDR, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, - int *interlace_method, int *compression_method, int *filter_method)); +PNG_EXPORT(143, png_uint_32, png_get_IHDR, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *width, png_uint_32 *height, + int *bit_depth, int *color_type, int *interlace_method, + int *compression_method, int *filter_method)); -PNG_EXPORT(144, void, png_set_IHDR, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, - int interlace_method, int compression_method, int filter_method)); +PNG_EXPORT(144, void, png_set_IHDR, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_method, int compression_method, + int filter_method)); #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(145, png_uint_32, png_get_oFFs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); +PNG_EXPORT(145, png_uint_32, png_get_oFFs, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, + int *unit_type)); #endif #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(146, void, png_set_oFFs, - (png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type)); +PNG_EXPORT(146, void, png_set_oFFs, (png_const_structrp png_ptr, + png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y, + int unit_type)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(147, png_uint_32, png_get_pCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, - int *nparams, - png_charp *units, png_charpp *params)); +PNG_EXPORT(147, png_uint_32, png_get_pCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, png_charp *purpose, png_int_32 *X0, + png_int_32 *X1, int *type, int *nparams, png_charp *units, + png_charpp *params)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, - png_infop info_ptr, - png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, - int nparams, png_const_charp units, png_charpp params)); +PNG_EXPORT(148, void, png_set_pCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, + int type, int nparams, png_const_charp units, png_charpp params)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(149, png_uint_32, png_get_pHYs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +PNG_EXPORT(149, png_uint_32, png_get_pHYs, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, + int *unit_type)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(150, void, png_set_pHYs, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type)); +PNG_EXPORT(150, void, png_set_pHYs, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); #endif -PNG_EXPORT(151, png_uint_32, png_get_PLTE, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_colorp *palette, int *num_palette)); +PNG_EXPORT(151, png_uint_32, png_get_PLTE, (png_const_structrp png_ptr, + png_inforp info_ptr, png_colorp *palette, int *num_palette)); -PNG_EXPORT(152, void, png_set_PLTE, - (png_structp png_ptr, png_infop info_ptr, - png_const_colorp palette, int num_palette)); +PNG_EXPORT(152, void, png_set_PLTE, (png_structrp png_ptr, + png_inforp info_ptr, png_const_colorp palette, int num_palette)); #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(153, png_uint_32, png_get_sBIT, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_8p *sig_bit)); +PNG_EXPORT(153, png_uint_32, png_get_sBIT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_color_8p *sig_bit)); #endif #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(154, void, png_set_sBIT, - (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); +PNG_EXPORT(154, void, png_set_sBIT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_color_8p sig_bit)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, - png_const_infop info_ptr, int *file_srgb_intent)); +PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structrp png_ptr, + png_const_inforp info_ptr, int *file_srgb_intent)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(156, void, png_set_sRGB, - (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); -PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, - png_infop info_ptr, int srgb_intent)); +PNG_EXPORT(156, void, png_set_sRGB, (png_const_structrp png_ptr, + png_inforp info_ptr, int srgb_intent)); +PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_const_structrp png_ptr, + png_inforp info_ptr, int srgb_intent)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(158, png_uint_32, png_get_iCCP, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charpp name, int *compression_type, png_bytepp profile, - png_uint_32 *proflen)); +PNG_EXPORT(158, png_uint_32, png_get_iCCP, (png_const_structrp png_ptr, + png_inforp info_ptr, png_charpp name, int *compression_type, + png_bytepp profile, png_uint_32 *proflen)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(159, void, png_set_iCCP, - (png_structp png_ptr, png_infop info_ptr, - png_const_charp name, int compression_type, png_const_bytep profile, - png_uint_32 proflen)); +PNG_EXPORT(159, void, png_set_iCCP, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_charp name, int compression_type, + png_const_bytep profile, png_uint_32 proflen)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(160, png_uint_32, png_get_sPLT, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_sPLT_tpp entries)); +PNG_EXPORT(160, int, png_get_sPLT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_sPLT_tpp entries)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(161, void, png_set_sPLT, - (png_structp png_ptr, png_infop info_ptr, - png_const_sPLT_tp entries, int nentries)); +PNG_EXPORT(161, void, png_set_sPLT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_sPLT_tp entries, int nentries)); #endif #ifdef PNG_TEXT_SUPPORTED /* png_get_text also returns the number of text chunks in *num_text */ -PNG_EXPORT(162, png_uint_32, png_get_text, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_textp *text_ptr, int *num_text)); +PNG_EXPORT(162, int, png_get_text, (png_const_structrp png_ptr, + png_inforp info_ptr, png_textp *text_ptr, int *num_text)); #endif /* Note while png_set_text() will accept a structure whose text, @@ -2170,122 +2147,220 @@ PNG_EXPORT(162, png_uint_32, png_get_text, */ #ifdef PNG_TEXT_SUPPORTED -PNG_EXPORT(163, void, png_set_text, - (png_structp png_ptr, png_infop info_ptr, - png_const_textp text_ptr, int num_text)); +PNG_EXPORT(163, void, png_set_text, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_textp text_ptr, int num_text)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(164, png_uint_32, png_get_tIME, - (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); +PNG_EXPORT(164, png_uint_32, png_get_tIME, (png_const_structrp png_ptr, + png_inforp info_ptr, png_timep *mod_time)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(165, void, png_set_tIME, - (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); +PNG_EXPORT(165, void, png_set_tIME, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_timep mod_time)); #endif #ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(166, png_uint_32, png_get_tRNS, - (png_const_structp png_ptr, png_infop info_ptr, - png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); +PNG_EXPORT(166, png_uint_32, png_get_tRNS, (png_const_structrp png_ptr, + png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans, + png_color_16p *trans_color)); #endif #ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(167, void, png_set_tRNS, - (png_structp png_ptr, png_infop info_ptr, - png_const_bytep trans_alpha, int num_trans, +PNG_EXPORT(167, void, png_set_tRNS, (png_structrp png_ptr, + png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)); #endif #ifdef PNG_sCAL_SUPPORTED -PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, double *width, double *height)) -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, (png_const_structrp png_ptr, + png_const_inforp info_ptr, int *unit, double *width, double *height)) +#if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \ + defined(PNG_FLOATING_POINT_SUPPORTED) /* NOTE: this API is currently implemented using floating point arithmetic, * consequently it can only be used on systems with floating point support. * In any case the range of values supported by png_fixed_point is small and it * is highly recommended that png_get_sCAL_s be used instead. */ PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, - (png_structp png_ptr, png_const_infop info_ptr, int *unit, - png_fixed_point *width, - png_fixed_point *height)) + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, + png_fixed_point *width, png_fixed_point *height)) #endif PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, png_charpp swidth, png_charpp sheight)); - -PNG_FP_EXPORT(170, void, png_set_sCAL, - (png_structp png_ptr, png_infop info_ptr, - int unit, double width, double height)) -PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, - png_infop info_ptr, int unit, png_fixed_point width, - png_fixed_point height)) -PNG_EXPORT(171, void, png_set_sCAL_s, - (png_structp png_ptr, png_infop info_ptr, - int unit, png_const_charp swidth, png_const_charp sheight)); -#endif /* PNG_sCAL_SUPPORTED */ - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -/* Provide a list of chunks and how they are to be handled, if the built-in - handling or default unknown chunk handling is not desired. Any chunks not - listed will be handled in the default manner. The IHDR and IEND chunks - must not be listed. Because this turns off the default handling for chunks - that would otherwise be recognized the behavior of libpng transformations may - well become incorrect! - keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior - = 1: PNG_HANDLE_CHUNK_NEVER: do not keep - = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy - = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy -*/ -PNG_EXPORT(172, void, png_set_keep_unknown_chunks, - (png_structp png_ptr, int keep, - png_const_bytep chunk_list, int num_chunks)); + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, + png_charpp swidth, png_charpp sheight)); -/* The handling code is returned; the result is therefore true (non-zero) if - * special handling is required, false for the default handling. - */ -PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, +PNG_FP_EXPORT(170, void, png_set_sCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, double width, double height)) +PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, png_fixed_point width, + png_fixed_point height)) +PNG_EXPORT(171, void, png_set_sCAL_s, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, + png_const_charp swidth, png_const_charp sheight)); +#endif /* sCAL */ + +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED +/* Provide the default handling for all unknown chunks or, optionally, for + * specific unknown chunks. + * + * NOTE: prior to 1.6.0 the handling specified for particular chunks on read was + * ignored and the default was used, the per-chunk setting only had an effect on + * write. If you wish to have chunk-specific handling on read in code that must + * work on earlier versions you must use a user chunk callback to specify the + * desired handling (keep or discard.) + * + * The 'keep' parameter is a PNG_HANDLE_CHUNK_ value as listed below. The + * parameter is interpreted as follows: + * + * READ: + * PNG_HANDLE_CHUNK_AS_DEFAULT: + * Known chunks: do normal libpng processing, do not keep the chunk (but + * see the comments below about PNG_HANDLE_AS_UNKNOWN_SUPPORTED) + * Unknown chunks: for a specific chunk use the global default, when used + * as the default discard the chunk data. + * PNG_HANDLE_CHUNK_NEVER: + * Discard the chunk data. + * PNG_HANDLE_CHUNK_IF_SAFE: + * Keep the chunk data if the chunk is not critical else raise a chunk + * error. + * PNG_HANDLE_CHUNK_ALWAYS: + * Keep the chunk data. + * + * If the chunk data is saved it can be retrieved using png_get_unknown_chunks, + * below. Notice that specifying "AS_DEFAULT" as a global default is equivalent + * to specifying "NEVER", however when "AS_DEFAULT" is used for specific chunks + * it simply resets the behavior to the libpng default. + * + * INTERACTION WTIH USER CHUNK CALLBACKS: + * The per-chunk handling is always used when there is a png_user_chunk_ptr + * callback and the callback returns 0; the chunk is then always stored *unless* + * it is critical and the per-chunk setting is other than ALWAYS. Notice that + * the global default is *not* used in this case. (In effect the per-chunk + * value is incremented to at least IF_SAFE.) + * + * IMPORTANT NOTE: this behavior will change in libpng 1.7 - the global and + * per-chunk defaults will be honored. If you want to preserve the current + * behavior when your callback returns 0 you must set PNG_HANDLE_CHUNK_IF_SAFE + * as the default - if you don't do this libpng 1.6 will issue a warning. + * + * If you want unhandled unknown chunks to be discarded in libpng 1.6 and + * earlier simply return '1' (handled). + * + * PNG_HANDLE_AS_UNKNOWN_SUPPORTED: + * If this is *not* set known chunks will always be handled by libpng and + * will never be stored in the unknown chunk list. Known chunks listed to + * png_set_keep_unknown_chunks will have no effect. If it is set then known + * chunks listed with a keep other than AS_DEFAULT will *never* be processed + * by libpng, in addition critical chunks must either be processed by the + * callback or saved. + * + * The IHDR and IEND chunks must not be listed. Because this turns off the + * default handling for chunks that would otherwise be recognized the + * behavior of libpng transformations may well become incorrect! + * + * WRITE: + * When writing chunks the options only apply to the chunks specified by + * png_set_unknown_chunks (below), libpng will *always* write known chunks + * required by png_set_ calls and will always write the core critical chunks + * (as required for PLTE). + * + * Each chunk in the png_set_unknown_chunks list is looked up in the + * png_set_keep_unknown_chunks list to find the keep setting, this is then + * interpreted as follows: + * + * PNG_HANDLE_CHUNK_AS_DEFAULT: + * Write safe-to-copy chunks and write other chunks if the global + * default is set to _ALWAYS, otherwise don't write this chunk. + * PNG_HANDLE_CHUNK_NEVER: + * Do not write the chunk. + * PNG_HANDLE_CHUNK_IF_SAFE: + * Write the chunk if it is safe-to-copy, otherwise do not write it. + * PNG_HANDLE_CHUNK_ALWAYS: + * Write the chunk. + * + * Note that the default behavior is effectively the opposite of the read case - + * in read unknown chunks are not stored by default, in write they are written + * by default. Also the behavior of PNG_HANDLE_CHUNK_IF_SAFE is very different + * - on write the safe-to-copy bit is checked, on read the critical bit is + * checked and on read if the chunk is critical an error will be raised. + * + * num_chunks: + * =========== + * If num_chunks is positive, then the "keep" parameter specifies the manner + * for handling only those chunks appearing in the chunk_list array, + * otherwise the chunk list array is ignored. + * + * If num_chunks is 0 the "keep" parameter specifies the default behavior for + * unknown chunks, as described above. + * + * If num_chunks is negative, then the "keep" parameter specifies the manner + * for handling all unknown chunks plus all chunks recognized by libpng + * except for the IHDR, PLTE, tRNS, IDAT, and IEND chunks (which continue to + * be processed by libpng. + */ +PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr, + int keep, png_const_bytep chunk_list, int num_chunks)); + +/* The "keep" PNG_HANDLE_CHUNK_ parameter for the specified chunk is returned; + * the result is therefore true (non-zero) if special handling is required, + * false for the default handling. + */ +PNG_EXPORT(173, int, png_handle_as_unknown, (png_const_structrp png_ptr, png_const_bytep chunk_name)); #endif -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, - png_infop info_ptr, png_const_unknown_chunkp unknowns, + +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED +PNG_EXPORT(174, void, png_set_unknown_chunks, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)); + /* NOTE: prior to 1.6.0 this routine set the 'location' field of the added + * unknowns to the location currently stored in the png_struct. This is + * invariably the wrong value on write. To fix this call the following API + * for each chunk in the list with the correct location. If you know your + * code won't be compiled on earlier versions you can rely on + * png_set_unknown_chunks(write-ptr, png_get_unknown_chunks(read-ptr)) doing + * the correct thing. + */ + PNG_EXPORT(175, void, png_set_unknown_chunk_location, - (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); -PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, - png_const_infop info_ptr, png_unknown_chunkpp entries)); + (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location)); + +PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr, + png_inforp info_ptr, png_unknown_chunkpp entries)); #endif /* Png_free_data() will turn off the "valid" flag for anything it frees. * If you need to turn it off for a chunk that your application has freed, * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */ -PNG_EXPORT(177, void, png_set_invalid, - (png_structp png_ptr, png_infop info_ptr, int mask)); +PNG_EXPORT(177, void, png_set_invalid, (png_const_structrp png_ptr, + png_inforp info_ptr, int mask)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* The "params" pointer is currently not used and is for future expansion. */ -PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +PNG_EXPORT(178, void, png_read_png, (png_structrp png_ptr, png_inforp info_ptr, int transforms, png_voidp params)); -PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, +#endif +#ifdef PNG_WRITE_SUPPORTED +PNG_EXPORT(179, void, png_write_png, (png_structrp png_ptr, png_inforp info_ptr, int transforms, png_voidp params)); #endif +#endif PNG_EXPORT(180, png_const_charp, png_get_copyright, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(181, png_const_charp, png_get_header_ver, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(182, png_const_charp, png_get_header_version, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, +PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structrp png_ptr, png_uint_32 mng_features_permitted)); #endif @@ -2294,75 +2369,77 @@ PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, #define PNG_HANDLE_CHUNK_NEVER 1 #define PNG_HANDLE_CHUNK_IF_SAFE 2 #define PNG_HANDLE_CHUNK_ALWAYS 3 +#define PNG_HANDLE_CHUNK_LAST 4 /* Strip the prepended error numbers ("#nnn ") from error and warning * messages before passing them to the error or warning handler. */ #ifdef PNG_ERROR_NUMBERS_SUPPORTED -PNG_EXPORT(185, void, png_set_strip_error_numbers, - (png_structp png_ptr, +PNG_EXPORT(185, void, png_set_strip_error_numbers, (png_structrp png_ptr, png_uint_32 strip_mode)); #endif /* Added in libpng-1.2.6 */ #ifdef PNG_SET_USER_LIMITS_SUPPORTED -PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, +PNG_EXPORT(186, void, png_set_user_limits, (png_structrp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)); PNG_EXPORT(187, png_uint_32, png_get_user_width_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(188, png_uint_32, png_get_user_height_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* Added in libpng-1.4.0 */ -PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, +PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)); PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* Added in libpng-1.4.1 */ -PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, +PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structrp png_ptr, png_alloc_size_t user_chunk_cache_max)); PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #endif #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_FP_EXPORT(196, float, png_get_x_offset_inches, - (png_const_structp png_ptr, png_const_infop info_ptr)) + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)) + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #endif -PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, - png_const_infop info_ptr)) +PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structrp png_ptr, + png_const_inforp info_ptr)) #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)) + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #endif # ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, - png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, +PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); -# endif /* PNG_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ +# endif /* pHYs */ +#endif /* INCH_CONVERSIONS */ /* Added in libpng-1.4.0 */ #ifdef PNG_IO_STATE_SUPPORTED -PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); +PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_const_structrp png_ptr)); + +/* Removed from libpng 1.6; use png_get_io_chunk_type. */ +PNG_REMOVED(200, png_const_bytep, png_get_io_chunk_name, (png_structrp png_ptr), + PNG_DEPRECATED) -PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, - (png_structp png_ptr), PNG_DEPRECATED); PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* The flags returned by png_get_io_state() are the following: */ # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ @@ -2374,7 +2451,7 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, # define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ # define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ # define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ -#endif /* ?PNG_IO_STATE_SUPPORTED */ +#endif /* IO_STATE */ /* Interlace support. The following macros are always defined so that if * libpng interlace handling is turned off the macros may be used to handle @@ -2418,10 +2495,10 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, * necessary to find the row in the output image given a row in an interlaced * image, so two more macros: */ -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) -#define PNG_COL_FROM_PASS_COL(xIn, pass) \ - (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) +#define PNG_ROW_FROM_PASS_ROW(y_in, pass) \ + (((y_in)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) +#define PNG_COL_FROM_PASS_COL(x_in, pass) \ + (((x_in)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) /* Two macros which return a boolean (0 or 1) saying whether the given row * or column is in a particular pass. These use a common utility macro that @@ -2458,27 +2535,29 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, * (png_uint_16)(alpha) \ + (png_uint_16)(bg)*(png_uint_16)(255 \ - (png_uint_16)(alpha)) + 128); \ - (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } + (composite) = (png_byte)(((temp + (temp >> 8)) >> 8) & 0xff); } # define png_composite_16(composite, fg, alpha, bg) \ { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ * (png_uint_32)(alpha) \ + (png_uint_32)(bg)*(65535 \ - (png_uint_32)(alpha)) + 32768); \ - (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } + (composite) = (png_uint_16)(0xffff & ((temp + (temp >> 16)) >> 16)); } #else /* Standard method using integer division */ -# define png_composite(composite, fg, alpha, bg) \ - (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ - (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ - 127) / 255) +# define png_composite(composite, fg, alpha, bg) \ + (composite) = \ + (png_byte)(0xff & (((png_uint_16)(fg) * (png_uint_16)(alpha) + \ + (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ + 127) / 255)) # define png_composite_16(composite, fg, alpha, bg) \ - (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ - (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ - 32767) / 65535) -#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ + (composite) = \ + (png_uint_16)(0xffff & (((png_uint_32)(fg) * (png_uint_32)(alpha) + \ + (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ + 32767) / 65535)) +#endif /* READ_COMPOSITE_NODIV */ #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); @@ -2486,7 +2565,7 @@ PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); #endif -PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, +PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_const_structrp png_ptr, png_const_bytep buf)); /* No png_get_int_16 -- may be added if there's a real need for it. */ @@ -2512,7 +2591,7 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); * The png_get_int_32() routine assumes we are using two's complement * format for negative values, which is almost certainly true. */ -# define png_get_uint_32(buf) \ +# define PNG_get_uint_32(buf) \ (((png_uint_32)(*(buf)) << 24) + \ ((png_uint_32)(*((buf) + 1)) << 16) + \ ((png_uint_32)(*((buf) + 2)) << 8) + \ @@ -2521,28 +2600,602 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the * function) incorrectly returned a value of type png_uint_32. */ -# define png_get_uint_16(buf) \ +# define PNG_get_uint_16(buf) \ ((png_uint_16) \ (((unsigned int)(*(buf)) << 8) + \ ((unsigned int)(*((buf) + 1))))) -# define png_get_int_32(buf) \ +# define PNG_get_int_32(buf) \ ((png_int_32)((*(buf) & 0x80) \ ? -((png_int_32)(((png_get_uint_32(buf)^0xffffffffU)+1U)&0x7fffffffU)) \ : (png_int_32)png_get_uint_32(buf))) + + /* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h, + * but defining a macro name prefixed with PNG_PREFIX. + */ +# ifndef PNG_PREFIX +# define png_get_uint_32(buf) PNG_get_uint_32(buf) +# define png_get_uint_16(buf) PNG_get_uint_16(buf) +# define png_get_int_32(buf) PNG_get_int_32(buf) +# endif +#else +# ifdef PNG_PREFIX + /* No macros; revert to the (redefined) function */ +# define PNG_get_uint_32 (png_get_uint_32) +# define PNG_get_uint_16 (png_get_uint_16) +# define PNG_get_int_32 (png_get_int_32) +# endif #endif #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED -PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr, - int allowed)); +PNG_EXPORT(242, void, png_set_check_for_invalid_index, + (png_structrp png_ptr, int allowed)); # ifdef PNG_GET_PALETTE_MAX_SUPPORTED -PNG_EXPORT(235, int, png_get_palette_max, (png_const_structp png_ptr, +PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr, png_const_infop info_ptr)); # endif #endif /* CHECK_FOR_INVALID_INDEX */ /******************************************************************************* - * IMPLEMENTATION OPTIONS + * Section 5: SIMPLIFIED API + ******************************************************************************* + * + * Please read the documentation in libpng-manual.txt (TODO: write said + * documentation) if you don't understand what follows. + * + * The simplified API hides the details of both libpng and the PNG file format + * itself. It allows PNG files to be read into a very limited number of + * in-memory bitmap formats or to be written from the same formats. If these + * formats do not accomodate your needs then you can, and should, use the more + * sophisticated APIs above - these support a wide variety of in-memory formats + * and a wide variety of sophisticated transformations to those formats as well + * as a wide variety of APIs to manipulate ancillary information. + * + * To read a PNG file using the simplified API: + * + * 1) Declare a 'png_image' structure (see below) on the stack, set the + * version field to PNG_IMAGE_VERSION and the 'opaque' pointer to NULL + * (this is REQUIRED, your program may crash if you don't do it.) + * 2) Call the appropriate png_image_begin_read... function. + * 3) Set the png_image 'format' member to the required sample format. + * 4) Allocate a buffer for the image and, if required, the color-map. + * 5) Call png_image_finish_read to read the image and, if required, the + * color-map into your buffers. + * + * There are no restrictions on the format of the PNG input itself; all valid + * color types, bit depths, and interlace methods are acceptable, and the + * input image is transformed as necessary to the requested in-memory format + * during the png_image_finish_read() step. The only caveat is that if you + * request a color-mapped image from a PNG that is full-color or makes + * complex use of an alpha channel the transformation is extremely lossy and the + * result may look terrible. + * + * To write a PNG file using the simplified API: + * + * 1) Declare a 'png_image' structure on the stack and memset() it to all zero. + * 2) Initialize the members of the structure that describe the image, setting + * the 'format' member to the format of the image samples. + * 3) Call the appropriate png_image_write... function with a pointer to the + * image and, if necessary, the color-map to write the PNG data. + * + * png_image is a structure that describes the in-memory format of an image + * when it is being read or defines the in-memory format of an image that you + * need to write: + */ +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) || \ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) + +#define PNG_IMAGE_VERSION 1 + +typedef struct png_control *png_controlp; +typedef struct +{ + png_controlp opaque; /* Initialize to NULL, free with png_image_free */ + png_uint_32 version; /* Set to PNG_IMAGE_VERSION */ + png_uint_32 width; /* Image width in pixels (columns) */ + png_uint_32 height; /* Image height in pixels (rows) */ + png_uint_32 format; /* Image format as defined below */ + png_uint_32 flags; /* A bit mask containing informational flags */ + png_uint_32 colormap_entries; + /* Number of entries in the color-map */ + + /* In the event of an error or warning the following field will be set to a + * non-zero value and the 'message' field will contain a '\0' terminated + * string with the libpng error or warning message. If both warnings and + * an error were encountered, only the error is recorded. If there + * are multiple warnings, only the first one is recorded. + * + * The upper 30 bits of this value are reserved, the low two bits contain + * a value as follows: + */ +# define PNG_IMAGE_WARNING 1 +# define PNG_IMAGE_ERROR 2 + /* + * The result is a two-bit code such that a value more than 1 indicates + * a failure in the API just called: + * + * 0 - no warning or error + * 1 - warning + * 2 - error + * 3 - error preceded by warning + */ +# define PNG_IMAGE_FAILED(png_cntrl) ((((png_cntrl).warning_or_error)&0x03)>1) + + png_uint_32 warning_or_error; + + char message[64]; +} png_image, *png_imagep; + +/* The samples of the image have one to four channels whose components have + * original values in the range 0 to 1.0: + * + * 1: A single gray or luminance channel (G). + * 2: A gray/luminance channel and an alpha channel (GA). + * 3: Three red, green, blue color channels (RGB). + * 4: Three color channels and an alpha channel (RGBA). + * + * The components are encoded in one of two ways: + * + * a) As a small integer, value 0..255, contained in a single byte. For the + * alpha channel the original value is simply value/255. For the color or + * luminance channels the value is encoded according to the sRGB specification + * and matches the 8-bit format expected by typical display devices. + * + * The color/gray channels are not scaled (pre-multiplied) by the alpha + * channel and are suitable for passing to color management software. + * + * b) As a value in the range 0..65535, contained in a 2-byte integer. All + * channels can be converted to the original value by dividing by 65535; all + * channels are linear. Color channels use the RGB encoding (RGB end-points) of + * the sRGB specification. This encoding is identified by the + * PNG_FORMAT_FLAG_LINEAR flag below. + * + * When the simplified API needs to convert between sRGB and linear colorspaces, + * the actual sRGB transfer curve defined in the sRGB specification (see the + * article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2 + * approximation used elsewhere in libpng. + * + * When an alpha channel is present it is expected to denote pixel coverage + * of the color or luminance channels and is returned as an associated alpha + * channel: the color/gray channels are scaled (pre-multiplied) by the alpha + * value. + * + * The samples are either contained directly in the image data, between 1 and 8 + * bytes per pixel according to the encoding, or are held in a color-map indexed + * by bytes in the image data. In the case of a color-map the color-map entries + * are individual samples, encoded as above, and the image data has one byte per + * pixel to select the relevant sample from the color-map. + */ + +/* PNG_FORMAT_* + * + * #defines to be used in png_image::format. Each #define identifies a + * particular layout of sample data and, if present, alpha values. There are + * separate defines for each of the two component encodings. + * + * A format is built up using single bit flag values. All combinations are + * valid. Formats can be built up from the flag values or you can use one of + * the predefined values below. When testing formats always use the FORMAT_FLAG + * macros to test for individual features - future versions of the library may + * add new flags. + * + * When reading or writing color-mapped images the format should be set to the + * format of the entries in the color-map then png_image_{read,write}_colormap + * called to read or write the color-map and set the format correctly for the + * image data. Do not set the PNG_FORMAT_FLAG_COLORMAP bit directly! + * + * NOTE: libpng can be built with particular features disabled. If you see + * compiler errors because the definition of one of the following flags has been + * compiled out it is because libpng does not have the required support. It is + * possible, however, for the libpng configuration to enable the format on just + * read or just write; in that case you may see an error at run time. You can + * guard against this by checking for the definition of the appropriate + * "_SUPPORTED" macro, one of: + * + * PNG_SIMPLIFIED_{READ,WRITE}_{BGR,AFIRST}_SUPPORTED + */ +#define PNG_FORMAT_FLAG_ALPHA 0x01U /* format with an alpha channel */ +#define PNG_FORMAT_FLAG_COLOR 0x02U /* color format: otherwise grayscale */ +#define PNG_FORMAT_FLAG_LINEAR 0x04U /* 2-byte channels else 1-byte */ +#define PNG_FORMAT_FLAG_COLORMAP 0x08U /* image data is color-mapped */ + +#ifdef PNG_FORMAT_BGR_SUPPORTED +# define PNG_FORMAT_FLAG_BGR 0x10U /* BGR colors, else order is RGB */ +#endif + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED +# define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */ +#endif + +/* Commonly used formats have predefined macros. + * + * First the single byte (sRGB) formats: + */ +#define PNG_FORMAT_GRAY 0 +#define PNG_FORMAT_GA PNG_FORMAT_FLAG_ALPHA +#define PNG_FORMAT_AG (PNG_FORMAT_GA|PNG_FORMAT_FLAG_AFIRST) +#define PNG_FORMAT_RGB PNG_FORMAT_FLAG_COLOR +#define PNG_FORMAT_BGR (PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_BGR) +#define PNG_FORMAT_RGBA (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_ARGB (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_AFIRST) +#define PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST) + +/* Then the linear 2-byte formats. When naming these "Y" is used to + * indicate a luminance (gray) channel. + */ +#define PNG_FORMAT_LINEAR_Y PNG_FORMAT_FLAG_LINEAR +#define PNG_FORMAT_LINEAR_Y_ALPHA (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_LINEAR_RGB (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR) +#define PNG_FORMAT_LINEAR_RGB_ALPHA \ + (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA) + +/* With color-mapped formats the image data is one byte for each pixel, the byte + * is an index into the color-map which is formatted as above. To obtain a + * color-mapped format it is sufficient just to add the PNG_FOMAT_FLAG_COLORMAP + * to one of the above definitions, or you can use one of the definitions below. + */ +#define PNG_FORMAT_RGB_COLORMAP (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_BGR_COLORMAP (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_RGBA_COLORMAP (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_ARGB_COLORMAP (PNG_FORMAT_ARGB|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_BGRA_COLORMAP (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_ABGR_COLORMAP (PNG_FORMAT_ABGR|PNG_FORMAT_FLAG_COLORMAP) + +/* PNG_IMAGE macros + * + * These are convenience macros to derive information from a png_image + * structure. The PNG_IMAGE_SAMPLE_ macros return values appropriate to the + * actual image sample values - either the entries in the color-map or the + * pixels in the image. The PNG_IMAGE_PIXEL_ macros return corresponding values + * for the pixels and will always return 1 for color-mapped formats. The + * remaining macros return information about the rows in the image and the + * complete image. + * + * NOTE: All the macros that take a png_image::format parameter are compile time + * constants if the format parameter is, itself, a constant. Therefore these + * macros can be used in array declarations and case labels where required. + * Similarly the macros are also pre-processor constants (sizeof is not used) so + * they can be used in #if tests. + * + * First the information about the samples. + */ +#define PNG_IMAGE_SAMPLE_CHANNELS(fmt)\ + (((fmt)&(PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA))+1) + /* Return the total number of channels in a given format: 1..4 */ + +#define PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)\ + ((((fmt) & PNG_FORMAT_FLAG_LINEAR) >> 2)+1) + /* Return the size in bytes of a single component of a pixel or color-map + * entry (as appropriate) in the image: 1 or 2. + */ + +#define PNG_IMAGE_SAMPLE_SIZE(fmt)\ + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)) + /* This is the size of the sample data for one sample. If the image is + * color-mapped it is the size of one color-map entry (and image pixels are + * one byte in size), otherwise it is the size of one image pixel. + */ + +#define PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(fmt)\ + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * 256) + /* The maximum size of the color-map required by the format expressed in a + * count of components. This can be used to compile-time allocate a + * color-map: + * + * png_uint_16 colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(linear_fmt)]; + * + * png_byte colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(sRGB_fmt)]; + * + * Alternatively use the PNG_IMAGE_COLORMAP_SIZE macro below to use the + * information from one of the png_image_begin_read_ APIs and dynamically + * allocate the required memory. + */ + +/* Corresponding information about the pixels */ +#define PNG_IMAGE_PIXEL_(test,fmt)\ + (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt)) + +#define PNG_IMAGE_PIXEL_CHANNELS(fmt)\ + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt) + /* The number of separate channels (components) in a pixel; 1 for a + * color-mapped image. + */ + +#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\ + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt) + /* The size, in bytes, of each component in a pixel; 1 for a color-mapped + * image. + */ + +#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt) + /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */ + +/* Information about the whole row, or whole image */ +#define PNG_IMAGE_ROW_STRIDE(image)\ + (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width) + /* Return the total number of components in a single row of the image; this + * is the minimum 'row stride', the minimum count of components between each + * row. For a color-mapped image this is the minimum number of bytes in a + * row. + * + * WARNING: this macro overflows for some images with more than one component + * and very large image widths. libpng will refuse to process an image where + * this macro would overflow. + */ + +#define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\ + (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride)) + /* Return the size, in bytes, of an image buffer given a png_image and a row + * stride - the number of components to leave space for in each row. + * + * WARNING: this macro overflows a 32-bit integer for some large PNG images, + * libpng will refuse to process an image where such an overflow would occur. + */ + +#define PNG_IMAGE_SIZE(image)\ + PNG_IMAGE_BUFFER_SIZE(image, PNG_IMAGE_ROW_STRIDE(image)) + /* Return the size, in bytes, of the image in memory given just a png_image; + * the row stride is the minimum stride required for the image. + */ + +#define PNG_IMAGE_COLORMAP_SIZE(image)\ + (PNG_IMAGE_SAMPLE_SIZE((image).format) * (image).colormap_entries) + /* Return the size, in bytes, of the color-map of this image. If the image + * format is not a color-map format this will return a size sufficient for + * 256 entries in the given format; check PNG_FORMAT_FLAG_COLORMAP if + * you don't want to allocate a color-map in this case. + */ + +/* PNG_IMAGE_FLAG_* + * + * Flags containing additional information about the image are held in the + * 'flags' field of png_image. + */ +#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01 + /* This indicates the the RGB values of the in-memory bitmap do not + * correspond to the red, green and blue end-points defined by sRGB. + */ + +#define PNG_IMAGE_FLAG_FAST 0x02 + /* On write emphasise speed over compression; the resultant PNG file will be + * larger but will be produced significantly faster, particular for large + * images. Do not use this option for images which will be distributed, only + * used it when producing intermediate files that will be read back in + * repeatedly. For a typical 24-bit image the option will double the read + * speed at the cost of increasing the image size by 25%, however for many + * more compressible images the PNG file can be 10 times larger with only a + * slight speed gain. + */ + +#define PNG_IMAGE_FLAG_16BIT_sRGB 0x04 + /* On read if the image is a 16-bit per component image and there is no gAMA + * or sRGB chunk assume that the components are sRGB encoded. Notice that + * images output by the simplified API always have gamma information; setting + * this flag only affects the interpretation of 16-bit images from an + * external source. It is recommended that the application expose this flag + * to the user; the user can normally easily recognize the difference between + * linear and sRGB encoding. This flag has no effect on write - the data + * passed to the write APIs must have the correct encoding (as defined + * above.) + * + * If the flag is not set (the default) input 16-bit per component data is + * assumed to be linear. + * + * NOTE: the flag can only be set after the png_image_begin_read_ call, + * because that call initializes the 'flags' field. + */ + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +/* READ APIs + * --------- + * + * The png_image passed to the read APIs must have been initialized by setting + * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.) + */ +#ifdef PNG_STDIO_SUPPORTED +PNG_EXPORT(234, int, png_image_begin_read_from_file, (png_imagep image, + const char *file_name)); + /* The named file is opened for read and the image header is filled in + * from the PNG header in the file. + */ + +PNG_EXPORT(235, int, png_image_begin_read_from_stdio, (png_imagep image, + FILE* file)); + /* The PNG header is read from the stdio FILE object. */ +#endif /* STDIO */ + +PNG_EXPORT(236, int, png_image_begin_read_from_memory, (png_imagep image, + png_const_voidp memory, png_size_t size)); + /* The PNG header is read from the given memory buffer. */ + +PNG_EXPORT(237, int, png_image_finish_read, (png_imagep image, + png_const_colorp background, void *buffer, png_int_32 row_stride, + void *colormap)); + /* Finish reading the image into the supplied buffer and clean up the + * png_image structure. + * + * row_stride is the step, in byte or 2-byte units as appropriate, + * between adjacent rows. A positive stride indicates that the top-most row + * is first in the buffer - the normal top-down arrangement. A negative + * stride indicates that the bottom-most row is first in the buffer. + * + * background need only be supplied if an alpha channel must be removed from + * a png_byte format and the removal is to be done by compositing on a solid + * color; otherwise it may be NULL and any composition will be done directly + * onto the buffer. The value is an sRGB color to use for the background, + * for grayscale output the green channel is used. + * + * background must be supplied when an alpha channel must be removed from a + * single byte color-mapped output format, in other words if: + * + * 1) The original format from png_image_begin_read_from_* had + * PNG_FORMAT_FLAG_ALPHA set. + * 2) The format set by the application does not. + * 3) The format set by the application has PNG_FORMAT_FLAG_COLORMAP set and + * PNG_FORMAT_FLAG_LINEAR *not* set. + * + * For linear output removing the alpha channel is always done by compositing + * on black and background is ignored. + * + * colormap must be supplied when PNG_FORMAT_FLAG_COLORMAP is set. It must + * be at least the size (in bytes) returned by PNG_IMAGE_COLORMAP_SIZE. + * image->colormap_entries will be updated to the actual number of entries + * written to the colormap; this may be less than the original value. + */ + +PNG_EXPORT(238, void, png_image_free, (png_imagep image)); + /* Free any data allocated by libpng in image->opaque, setting the pointer to + * NULL. May be called at any time after the structure is initialized. + */ +#endif /* SIMPLIFIED_READ */ + +#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED +/* WRITE APIS + * ---------- + * For write you must initialize a png_image structure to describe the image to + * be written. To do this use memset to set the whole structure to 0 then + * initialize fields describing your image. + * + * version: must be set to PNG_IMAGE_VERSION + * opaque: must be initialized to NULL + * width: image width in pixels + * height: image height in rows + * format: the format of the data (image and color-map) you wish to write + * flags: set to 0 unless one of the defined flags applies; set + * PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB for color format images where the RGB + * values do not correspond to the colors in sRGB. + * colormap_entries: set to the number of entries in the color-map (0 to 256) + */ +#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED +PNG_EXPORT(239, int, png_image_write_to_file, (png_imagep image, + const char *file, int convert_to_8bit, const void *buffer, + png_int_32 row_stride, const void *colormap)); + /* Write the image to the named file. */ + +PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file, + int convert_to_8_bit, const void *buffer, png_int_32 row_stride, + const void *colormap)); + /* Write the image to the given (FILE*). */ +#endif /* SIMPLIFIED_WRITE_STDIO */ + +/* With all write APIs if image is in one of the linear formats with 16-bit + * data then setting convert_to_8_bit will cause the output to be an 8-bit PNG + * gamma encoded according to the sRGB specification, otherwise a 16-bit linear + * encoded PNG file is written. + * + * With color-mapped data formats the colormap parameter point to a color-map + * with at least image->colormap_entries encoded in the specified format. If + * the format is linear the written PNG color-map will be converted to sRGB + * regardless of the convert_to_8_bit flag. + * + * With all APIs row_stride is handled as in the read APIs - it is the spacing + * from one row to the next in component sized units (1 or 2 bytes) and if + * negative indicates a bottom-up row layout in the buffer. If row_stride is + * zero, libpng will calculate it for you from the image width and number of + * channels. + * + * Note that the write API does not support interlacing, sub-8-bit pixels or + * most ancillary chunks. If you need to write text chunks (e.g. for copyright + * notices) you need to use one of the other APIs. + */ + +PNG_EXPORT(245, int, png_image_write_to_memory, (png_imagep image, void *memory, + png_alloc_size_t * PNG_RESTRICT memory_bytes, int convert_to_8_bit, + const void *buffer, png_int_32 row_stride, const void *colormap)); + /* Write the image to the given memory buffer. The function both writes the + * whole PNG data stream to *memory and updates *memory_bytes with the count + * of bytes written. + * + * 'memory' may be NULL. In this case *memory_bytes is not read however on + * success the number of bytes which would have been written will still be + * stored in *memory_bytes. On failure *memory_bytes will contain 0. + * + * If 'memory' is not NULL it must point to memory[*memory_bytes] of + * writeable memory. + * + * If the function returns success memory[*memory_bytes] (if 'memory' is not + * NULL) contains the written PNG data. *memory_bytes will always be less + * than or equal to the original value. + * + * If the function returns false and *memory_bytes was not changed an error + * occured during write. If *memory_bytes was changed, or is not 0 if + * 'memory' was NULL, the write would have succeeded but for the memory + * buffer being too small. *memory_bytes contains the required number of + * bytes and will be bigger that the original value. + */ + +#define png_image_write_get_memory_size(image, size, convert_to_8_bit, buffer,\ + row_stride, colormap)\ + png_image_write_to_memory(&(image), 0, &(size), convert_to_8_bit, buffer,\ + row_stride, colormap) + /* Return the amount of memory in 'size' required to compress this image. + * The png_image structure 'image' must be filled in as in the above + * function and must not be changed before the actual write call, the buffer + * and all other parameters must also be identical to that in the final + * write call. The 'size' variable need not be initialized. + * + * NOTE: the macro returns true/false, if false is returned 'size' will be + * set to zero and the write failed and probably will fail if tried again. + */ + +/* You can pre-allocate the buffer by making sure it is of sufficient size + * regardless of the amount of compression achieved. The buffer size will + * always be bigger than the original image and it will never be filled. The + * following macros are provided to assist in allocating the buffer. + */ +#define PNG_IMAGE_DATA_SIZE(image) (PNG_IMAGE_SIZE(image)+(image).height) + /* The number of uncompressed bytes in the PNG byte encoding of the image; + * uncompressing the PNG IDAT data will give this number of bytes. + * + * NOTE: while PNG_IMAGE_SIZE cannot overflow for an image in memory this + * macro can because of the extra bytes used in the PNG byte encoding. You + * need to avoid this macro if your image size approaches 2^30 in width or + * height. The same goes for the remainder of these macros; they all produce + * bigger numbers than the actual in-memory image size. + */ +#ifndef PNG_ZLIB_MAX_SIZE +# define PNG_ZLIB_MAX_SIZE(b) ((b)+(((b)+7U)>>3)+(((b)+63U)>>6)+11U) + /* An upper bound on the number of compressed bytes given 'b' uncompressed + * bytes. This is based on deflateBounds() in zlib; different + * implementations of zlib compression may conceivably produce more data so + * if your zlib implementation is not zlib itself redefine this macro + * appropriately. + */ +#endif + +#define PNG_IMAGE_COMPRESSED_SIZE_MAX(image)\ + PNG_ZLIB_MAX_SIZE((png_alloc_size_t)PNG_IMAGE_DATA_SIZE(image)) + /* An upper bound on the size of the data in the PNG IDAT chunks. */ + +#define PNG_IMAGE_PNG_SIZE_MAX_(image, image_size)\ + ((8U/*sig*/+25U/*IHDR*/+16U/*gAMA*/+44U/*cHRM*/+12U/*IEND*/+\ + (((image).format&PNG_FORMAT_FLAG_COLORMAP)?/*colormap: PLTE, tRNS*/\ + 12U+3U*(image).colormap_entries/*PLTE data*/+\ + (((image).format&PNG_FORMAT_FLAG_ALPHA)?\ + 12U/*tRNS*/+(image).colormap_entries:0U):0U)+\ + 12U)+(12U*((image_size)/PNG_ZBUF_SIZE))/*IDAT*/+(image_size)) + /* A helper for the following macro; if your compiler cannot handle the + * following macro use this one with the result of + * PNG_IMAGE_COMPRESSED_SIZE_MAX(image) as the second argument (most + * compilers should handle this just fine.) + */ + +#define PNG_IMAGE_PNG_SIZE_MAX(image)\ + PNG_IMAGE_PNG_SIZE_MAX_(image, PNG_IMAGE_COMPRESSED_SIZE_MAX(image)) + /* An upper bound on the total length of the PNG data stream for 'image'. + * The result is of type png_alloc_size_t, on 32-bit systems this may + * overflow even though PNG_IMAGE_DATA_SIZE does not overflow; the write will + * run out of buffer space but return a corrected size which should work. + */ +#endif /* SIMPLIFIED_WRITE */ +/******************************************************************************* + * END OF SIMPLIFIED API + ******************************************************************************/ +#endif /* SIMPLIFIED_{READ|WRITE} */ + +/******************************************************************************* + * Section 6: IMPLEMENTATION OPTIONS ******************************************************************************* * * Support for arbitrary implementation-specific optimizations. The API allows @@ -2566,7 +3219,9 @@ PNG_EXPORT(235, int, png_get_palette_max, (png_const_structp png_ptr, #ifdef PNG_ARM_NEON_API_SUPPORTED # define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */ #endif -#define PNG_OPTION_NEXT 2 /* Next option - numbers must be even */ +#define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */ +#define PNG_SKIP_sRGB_CHECK_PROFILE 4 /* SOFTWARE: Check ICC profile for sRGB */ +#define PNG_OPTION_NEXT 6 /* Next option - numbers must be even */ /* Return values: NOTE: there are four values and 'off' is *not* zero */ #define PNG_OPTION_UNSET 0 /* Unset - defaults to off */ @@ -2574,24 +3229,23 @@ PNG_EXPORT(235, int, png_get_palette_max, (png_const_structp png_ptr, #define PNG_OPTION_OFF 2 #define PNG_OPTION_ON 3 -PNG_EXPORT(236, int, png_set_option, (png_structp png_ptr, int option, +PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option, int onoff)); -#endif +#endif /* SET_OPTION */ /******************************************************************************* - * END OF HARDWARE OPTIONS + * END OF HARDWARE AND SOFTWARE OPTIONS ******************************************************************************/ -/* Maintainer: Put new public prototypes here ^, in libpng.3, and project - * defs +/* Maintainer: Put new public prototypes here ^, in libpng.3, in project + * defs, and in scripts/symbols.def. */ /* The last ordinal number (this is the *last* one already used; the next - * one to use is one more than this.) Maintainer, remember to add an entry to - * scripts/symbols.def as well. + * one to use is one more than this.) */ #ifdef PNG_EXPORT_LAST_ORDINAL - PNG_EXPORT_LAST_ORDINAL(236); + PNG_EXPORT_LAST_ORDINAL(245); #endif #ifdef __cplusplus diff --git a/drivers/png/pngconf.h b/drivers/png/pngconf.h index ce1ff5853f..b0ccc8c25e 100644 --- a/drivers/png/pngconf.h +++ b/drivers/png/pngconf.h @@ -1,9 +1,9 @@ /* pngconf.h - machine configurable file for libpng * - * libpng version 1.5.27, May 26, 2016 + * libpng version 1.6.23, June 9, 2016 * - * Copyright (c) 1998-2002,2004,2006-2013 Glenn Randers-Pehrson + * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -20,34 +20,50 @@ #ifndef PNGCONF_H #define PNGCONF_H -#ifndef PNG_BUILDING_SYMBOL_TABLE -/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C - * definition file for machine specific limits, this may impact the - * correctness of the definitions below (see uses of INT_MAX). - */ -# ifndef PNG_NO_LIMITS_H -# include <limits.h> -# endif +#ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */ -/* For the memory copy APIs (i.e. the standard definitions of these), - * because this file defines png_memcpy and so on the base APIs must - * be defined here. +/* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C + * compiler for correct compilation. The following header files are required by + * the standard. If your compiler doesn't provide these header files, or they + * do not match the standard, you will need to provide/improve them. */ -# ifdef BSD -# include <strings.h> -# else -# include <string.h> -# endif - -/* For png_FILE_p - this provides the standard definition of a - * FILE +#include <limits.h> +#include <stddef.h> + +/* Library header files. These header files are all defined by ISOC90; libpng + * expects conformant implementations, however, an ISOC90 conformant system need + * not provide these header files if the functionality cannot be implemented. + * In this case it will be necessary to disable the relevant parts of libpng in + * the build of pnglibconf.h. + * + * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not + * include this unnecessary header file. */ -# ifdef PNG_STDIO_SUPPORTED -# include <stdio.h> -# endif + +#ifdef PNG_STDIO_SUPPORTED + /* Required for the definition of FILE: */ +# include <stdio.h> #endif -/* This controls optimization of the reading of 16 and 32 bit values +#ifdef PNG_SETJMP_SUPPORTED + /* Required for the definition of jmp_buf and the declaration of longjmp: */ +# include <setjmp.h> +#endif + +#ifdef PNG_CONVERT_tIME_SUPPORTED + /* Required for struct tm: */ +# include <time.h> +#endif + +#endif /* PNG_BUILDING_SYMBOL_TABLE */ + +/* Prior to 1.6.0 it was possible to turn off 'const' in declarations using + * PNG_NO_CONST; this is no longer supported except for data declarations which + * apparently still cause problems in 2011 on some compilers. + */ +#define PNG_CONST const /* backward compatibility only */ + +/* This controls optimization of the reading of 16-bit and 32-bit values * from PNG files. It can be set on a per-app-file basis - it * just changes whether a macro is used when the function is called. * The library builder sets the default; if read functions are not @@ -70,28 +86,13 @@ * may be changed on a per-file basis when compiling against libpng. */ -/* The PNGARG macro protects us against machines that don't have function - * prototypes (ie K&R style headers). If your compiler does not handle - * function prototypes, define this macro and use the included ansi2knr. - * I've always been able to use _NO_PROTO as the indicator, but you may - * need to drag the empty declaration out in front of here, or change the - * ifdef to suit your own needs. +/* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect + * against legacy (pre ISOC90) compilers that did not understand function + * prototypes. It is not required for modern C compilers. */ #ifndef PNGARG - -# ifdef OF /* zlib prototype munger */ -# define PNGARG(arglist) OF(arglist) -# else - -# ifdef _NO_PROTO -# define PNGARG(arglist) () -# else -# define PNGARG(arglist) arglist -# endif /* _NO_PROTO */ - -# endif /* OF */ - -#endif /* PNGARG */ +# define PNGARG(arglist) arglist +#endif /* Function calling conventions. * ============================= @@ -215,10 +216,11 @@ # define PNGAPI _stdcall # endif # endif /* compiler/api */ + /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) - ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed +# error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed" # endif # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ @@ -293,11 +295,11 @@ * table entries, so we discard it here. See the .dfn files in the * scripts directory. */ -#ifndef PNG_EXPORTA -# define PNG_EXPORTA(ordinal, type, name, args, attributes)\ - PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ - extern attributes) +#ifndef PNG_EXPORTA +# define PNG_EXPORTA(ordinal, type, name, args, attributes) \ + PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \ + PNG_LINKAGE_API attributes) #endif /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, @@ -305,7 +307,7 @@ */ #define PNG_EMPTY /*empty list*/ -#define PNG_EXPORT(ordinal, type, name, args)\ +#define PNG_EXPORT(ordinal, type, name, args) \ PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) /* Use PNG_REMOVED to comment out a removed interface. */ @@ -332,12 +334,38 @@ #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED /* Support for compiler specific function attributes. These are used - * so that where compiler support is available incorrect use of API + * so that where compiler support is available, incorrect use of API * functions in png.h will generate compiler warnings. Added at libpng - * version 1.2.41. + * version 1.2.41. Disabling these removes the warnings but may also produce + * less efficient code. */ +# if defined(__clang__) && defined(__has_attribute) + /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */ +# if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__) +# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) +# endif +# if !defined(PNG_NORETURN) && __has_attribute(__noreturn__) +# define PNG_NORETURN __attribute__((__noreturn__)) +# endif +# if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__) +# define PNG_ALLOCATED __attribute__((__malloc__)) +# endif +# if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__) +# define PNG_DEPRECATED __attribute__((__deprecated__)) +# endif +# if !defined(PNG_PRIVATE) +# ifdef __has_extension +# if __has_extension(attribute_unavailable_with_message) +# define PNG_PRIVATE __attribute__((__unavailable__(\ + "This function is not exported by libpng."))) +# endif +# endif +# endif +# ifndef PNG_RESTRICT +# define PNG_RESTRICT __restrict +# endif -# if defined(__GNUC__) +# elif defined(__GNUC__) # ifndef PNG_USE_RESULT # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) # endif @@ -360,15 +388,19 @@ __attribute__((__deprecated__)) # endif # endif +# if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) +# ifndef PNG_RESTRICT +# define PNG_RESTRICT __restrict +# endif +# endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */ # endif /* __GNUC__ >= 3 */ -# endif /* __GNUC__ */ -# if defined(_MSC_VER) && (_MSC_VER >= 1300) +# elif defined(_MSC_VER) && (_MSC_VER >= 1300) # ifndef PNG_USE_RESULT # define PNG_USE_RESULT /* not supported */ # endif # ifndef PNG_NORETURN -# define PNG_NORETURN __declspec(noreturn) +# define PNG_NORETURN __declspec(noreturn) # endif # ifndef PNG_ALLOCATED # if (_MSC_VER >= 1400) @@ -381,7 +413,17 @@ # ifndef PNG_PRIVATE # define PNG_PRIVATE __declspec(deprecated) # endif -# endif /* _MSC_VER */ +# ifndef PNG_RESTRICT +# if (_MSC_VER >= 1400) +# define PNG_RESTRICT __restrict +# endif +# endif + +# elif defined(__WATCOMC__) +# ifndef PNG_RESTRICT +# define PNG_RESTRICT __restrict +# endif +# endif #endif /* PNG_PEDANTIC_WARNINGS */ #ifndef PNG_DEPRECATED @@ -399,6 +441,10 @@ #ifndef PNG_PRIVATE # define PNG_PRIVATE /* This is a private libpng function */ #endif +#ifndef PNG_RESTRICT +# define PNG_RESTRICT /* The C99 "restrict" feature */ +#endif + #ifndef PNG_FP_EXPORT /* A floating point API. */ # ifdef PNG_FLOATING_POINT_SUPPORTED # define PNG_FP_EXPORT(ordinal, type, name, args)\ @@ -416,183 +462,161 @@ # endif #endif -/* The following uses const char * instead of char * for error - * and warning message functions, so some compilers won't complain. - * If you do not want to use const, define PNG_NO_CONST here. +#ifndef PNG_BUILDING_SYMBOL_TABLE +/* Some typedefs to get us started. These should be safe on most of the common + * platforms. * - * This should not change how the APIs are called, so it can be done - * on a per-file basis in the application. + * png_uint_32 and png_int_32 may, currently, be larger than required to hold a + * 32-bit value however this is not normally advisable. + * + * png_uint_16 and png_int_16 should always be two bytes in size - this is + * verified at library build time. + * + * png_byte must always be one byte in size. + * + * The checks below use constants from limits.h, as defined by the ISOC90 + * standard. */ -#ifndef PNG_CONST -# ifndef PNG_NO_CONST -# define PNG_CONST const -# else -# define PNG_CONST -# endif +#if CHAR_BIT == 8 && UCHAR_MAX == 255 + typedef unsigned char png_byte; +#else +# error "libpng requires 8-bit bytes" #endif -/* Some typedefs to get us started. These should be safe on most of the - * common platforms. The typedefs should be at least as large as the - * numbers suggest (a png_uint_32 must be at least 32 bits long), but they - * don't have to be exactly that size. Some compilers dislike passing - * unsigned shorts as function parameters, so you may be better off using - * unsigned int for png_uint_16. - */ +#if INT_MIN == -32768 && INT_MAX == 32767 + typedef int png_int_16; +#elif SHRT_MIN == -32768 && SHRT_MAX == 32767 + typedef short png_int_16; +#else +# error "libpng requires a signed 16-bit type" +#endif -#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL) -typedef unsigned int png_uint_32; -typedef int png_int_32; +#if UINT_MAX == 65535 + typedef unsigned int png_uint_16; +#elif USHRT_MAX == 65535 + typedef unsigned short png_uint_16; #else -typedef unsigned long png_uint_32; -typedef long png_int_32; +# error "libpng requires an unsigned 16-bit type" #endif -typedef unsigned short png_uint_16; -typedef short png_int_16; -typedef unsigned char png_byte; -#ifdef PNG_NO_SIZE_T -typedef unsigned int png_size_t; +#if INT_MIN < -2147483646 && INT_MAX > 2147483646 + typedef int png_int_32; +#elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646 + typedef long int png_int_32; #else -typedef size_t png_size_t; +# error "libpng requires a signed 32-bit (or more) type" #endif -#define png_sizeof(x) (sizeof (x)) -/* The following is needed for medium model support. It cannot be in the - * pngpriv.h header. Needs modification for other compilers besides - * MSC. Model independent support declares all arrays and pointers to be - * large using the far keyword. The zlib version used must also support - * model independent data. As of version zlib 1.0.4, the necessary changes - * have been made in zlib. The USE_FAR_KEYWORD define triggers other - * changes that are needed. (Tim Wegner) - */ +#if UINT_MAX > 4294967294 + typedef unsigned int png_uint_32; +#elif ULONG_MAX > 4294967294 + typedef unsigned long int png_uint_32; +#else +# error "libpng requires an unsigned 32-bit (or more) type" +#endif -/* Separate compiler dependencies (problem here is that zlib.h always - * defines FAR. (SJT) - */ -#ifdef __BORLANDC__ -# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) -# define LDATA 1 -# else -# define LDATA 0 -# endif - /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ -# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) -# define PNG_MAX_MALLOC_64K /* only used in build */ -# if (LDATA != 1) -# ifndef FAR -# define FAR __far -# endif -# define USE_FAR_KEYWORD -# endif /* LDATA != 1 */ - /* Possibly useful for moving data out of default segment. - * Uncomment it if you want. Could also define FARDATA as - * const if your compiler supports it. (SJT) -# define FARDATA FAR - */ -# endif /* __WIN32__, __FLAT__, __CYGWIN__ */ -#endif /* __BORLANDC__ */ - - -/* Suggest testing for specific compiler first before testing for - * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, - * making reliance oncertain keywords suspect. (SJT) +/* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however, + * requires an ISOC90 compiler and relies on consistent behavior of sizeof. */ +typedef size_t png_size_t; +typedef ptrdiff_t png_ptrdiff_t; -/* MSC Medium model */ -#ifdef FAR -# ifdef M_I86MM -# define USE_FAR_KEYWORD -# define FARDATA FAR -# include <dos.h> +/* libpng needs to know the maximum value of 'size_t' and this controls the + * definition of png_alloc_size_t, below. This maximum value of size_t limits + * but does not control the maximum allocations the library makes - there is + * direct application control of this through png_set_user_limits(). + */ +#ifndef PNG_SMALL_SIZE_T + /* Compiler specific tests for systems where size_t is known to be less than + * 32 bits (some of these systems may no longer work because of the lack of + * 'far' support; see above.) + */ +# if (defined(__TURBOC__) && !defined(__FLAT__)) ||\ + (defined(_MSC_VER) && defined(MAXSEG_64K)) +# define PNG_SMALL_SIZE_T # endif #endif -/* SJT: default case */ -#ifndef FAR -# define FAR +/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no + * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to + * png_alloc_size_t are not necessary; in fact, it is recommended not to use + * them at all so that the compiler can complain when something turns out to be + * problematic. + * + * Casts in the other direction (from png_alloc_size_t to png_size_t or + * png_uint_32) should be explicitly applied; however, we do not expect to + * encounter practical situations that require such conversions. + * + * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than + * 4294967295 - i.e. less than the maximum value of png_uint_32. + */ +#ifdef PNG_SMALL_SIZE_T + typedef png_uint_32 png_alloc_size_t; +#else + typedef png_size_t png_alloc_size_t; #endif -/* At this point FAR is always defined */ -#ifndef FARDATA -# define FARDATA -#endif +/* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler + * implementations of Intel CPU specific support of user-mode segmented address + * spaces, where 16-bit pointers address more than 65536 bytes of memory using + * separate 'segment' registers. The implementation requires two different + * types of pointer (only one of which includes the segment value.) + * + * If required this support is available in version 1.2 of libpng and may be + * available in versions through 1.5, although the correctness of the code has + * not been verified recently. + */ -/* Typedef for floating-point numbers that are converted - * to fixed-point with a multiple of 100,000, e.g., gamma +/* Typedef for floating-point numbers that are converted to fixed-point with a + * multiple of 100,000, e.g., gamma */ typedef png_int_32 png_fixed_point; /* Add typedefs for pointers */ -typedef void FAR * png_voidp; -typedef PNG_CONST void FAR * png_const_voidp; -typedef png_byte FAR * png_bytep; -typedef PNG_CONST png_byte FAR * png_const_bytep; -typedef png_uint_32 FAR * png_uint_32p; -typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; -typedef png_int_32 FAR * png_int_32p; -typedef PNG_CONST png_int_32 FAR * png_const_int_32p; -typedef png_uint_16 FAR * png_uint_16p; -typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; -typedef png_int_16 FAR * png_int_16p; -typedef PNG_CONST png_int_16 FAR * png_const_int_16p; -typedef char FAR * png_charp; -typedef PNG_CONST char FAR * png_const_charp; -typedef png_fixed_point FAR * png_fixed_point_p; -typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; -typedef png_size_t FAR * png_size_tp; -typedef PNG_CONST png_size_t FAR * png_const_size_tp; +typedef void * png_voidp; +typedef const void * png_const_voidp; +typedef png_byte * png_bytep; +typedef const png_byte * png_const_bytep; +typedef png_uint_32 * png_uint_32p; +typedef const png_uint_32 * png_const_uint_32p; +typedef png_int_32 * png_int_32p; +typedef const png_int_32 * png_const_int_32p; +typedef png_uint_16 * png_uint_16p; +typedef const png_uint_16 * png_const_uint_16p; +typedef png_int_16 * png_int_16p; +typedef const png_int_16 * png_const_int_16p; +typedef char * png_charp; +typedef const char * png_const_charp; +typedef png_fixed_point * png_fixed_point_p; +typedef const png_fixed_point * png_const_fixed_point_p; +typedef png_size_t * png_size_tp; +typedef const png_size_t * png_const_size_tp; #ifdef PNG_STDIO_SUPPORTED typedef FILE * png_FILE_p; #endif #ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * png_doublep; -typedef PNG_CONST double FAR * png_const_doublep; +typedef double * png_doublep; +typedef const double * png_const_doublep; #endif /* Pointers to pointers; i.e. arrays */ -typedef png_byte FAR * FAR * png_bytepp; -typedef png_uint_32 FAR * FAR * png_uint_32pp; -typedef png_int_32 FAR * FAR * png_int_32pp; -typedef png_uint_16 FAR * FAR * png_uint_16pp; -typedef png_int_16 FAR * FAR * png_int_16pp; -typedef PNG_CONST char FAR * FAR * png_const_charpp; -typedef char FAR * FAR * png_charpp; -typedef png_fixed_point FAR * FAR * png_fixed_point_pp; +typedef png_byte * * png_bytepp; +typedef png_uint_32 * * png_uint_32pp; +typedef png_int_32 * * png_int_32pp; +typedef png_uint_16 * * png_uint_16pp; +typedef png_int_16 * * png_int_16pp; +typedef const char * * png_const_charpp; +typedef char * * png_charpp; +typedef png_fixed_point * * png_fixed_point_pp; #ifdef PNG_FLOATING_POINT_SUPPORTED -typedef double FAR * FAR * png_doublepp; +typedef double * * png_doublepp; #endif /* Pointers to pointers to pointers; i.e., pointer to array */ -typedef char FAR * FAR * FAR * png_charppp; +typedef char * * * png_charppp; -/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, - * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 - * to png_alloc_size_t are not necessary; in fact, it is recommended - * not to use them at all so that the compiler can complain when something - * turns out to be problematic. - * Casts in the other direction (from png_alloc_size_t to png_size_t or - * png_uint_32) should be explicitly applied; however, we do not expect - * to encounter practical situations that require such conversions. - */ -#if defined(__TURBOC__) && !defined(__FLAT__) - typedef unsigned long png_alloc_size_t; -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - typedef unsigned long png_alloc_size_t; -# else - /* This is an attempt to detect an old Windows system where (int) is - * actually 16 bits, in that case png_malloc must have an argument with a - * bigger size to accomodate the requirements of the library. - */ -# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \ - (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL) - typedef DWORD png_alloc_size_t; -# else - typedef png_size_t png_alloc_size_t; -# endif -# endif -#endif +#endif /* PNG_BUILDING_SYMBOL_TABLE */ #endif /* PNGCONF_H */ diff --git a/drivers/png/pngdebug.h b/drivers/png/pngdebug.h index 020369f061..15a7ed0c95 100644 --- a/drivers/png/pngdebug.h +++ b/drivers/png/pngdebug.h @@ -1,8 +1,8 @@ /* pngdebug.h - Debugging macros for libpng, also used in pngtest.c * - * Last changed in libpng 1.5.18 [February 6, 2014] - * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson + * Last changed in libpng 1.6.8 [December 19, 2013] + * Copyright (c) 1998-2002,2004,2006-2013 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * diff --git a/drivers/png/pngerror.c b/drivers/png/pngerror.c index 372d1b6fbd..3fc8092fa6 100644 --- a/drivers/png/pngerror.c +++ b/drivers/png/pngerror.c @@ -1,7 +1,7 @@ /* pngerror.c - stub functions for i/o and memory allocation * - * Last changed in libpng 1.5.19 [August 21, 2014] + * Last changed in libpng 1.6.15 [November 20, 2014] * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) @@ -20,14 +20,14 @@ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr, +static PNG_FUNCTION(void, png_default_error,PNGARG((png_const_structrp png_ptr, png_const_charp error_message)),PNG_NORETURN); #ifdef PNG_WARNINGS_SUPPORTED static void /* PRIVATE */ -png_default_warning PNGARG((png_structp png_ptr, +png_default_warning PNGARG((png_const_structrp png_ptr, png_const_charp warning_message)); -#endif /* PNG_WARNINGS_SUPPORTED */ +#endif /* WARNINGS */ /* This function is called whenever there is a fatal error. This function * should not be changed. If there is a need to handle errors differently, @@ -36,14 +36,15 @@ png_default_warning PNGARG((png_structp png_ptr, */ #ifdef PNG_ERROR_TEXT_SUPPORTED PNG_FUNCTION(void,PNGAPI -png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) +png_error,(png_const_structrp png_ptr, png_const_charp error_message), + PNG_NORETURN) { #ifdef PNG_ERROR_NUMBERS_SUPPORTED char msg[16]; if (png_ptr != NULL) { - if (png_ptr->flags& - (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) + if ((png_ptr->flags & + (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) != 0) { if (*error_message == PNG_LITERAL_SHARP) { @@ -53,7 +54,7 @@ png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) if (error_message[offset] == ' ') break; - if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) + if ((png_ptr->flags & PNG_FLAG_STRIP_ERROR_TEXT) != 0) { int i; for (i = 0; i < offset - 1; i++) @@ -68,7 +69,7 @@ png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) else { - if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) + if ((png_ptr->flags & PNG_FLAG_STRIP_ERROR_TEXT) != 0) { msg[0] = '0'; msg[1] = '\0'; @@ -79,7 +80,8 @@ png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) } #endif if (png_ptr != NULL && png_ptr->error_fn != NULL) - (*(png_ptr->error_fn))(png_ptr, error_message); + (*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), + error_message); /* If the custom handler doesn't exist, or if it returns, use the default handler, which will not return. */ @@ -87,7 +89,7 @@ png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) } #else PNG_FUNCTION(void,PNGAPI -png_err,(png_structp png_ptr),PNG_NORETURN) +png_err,(png_const_structrp png_ptr),PNG_NORETURN) { /* Prior to 1.5.2 the error_fn received a NULL pointer, expressed * erroneously as '\0', instead of the empty string "". This was @@ -95,13 +97,13 @@ png_err,(png_structp png_ptr),PNG_NORETURN) * will crash in this case. */ if (png_ptr != NULL && png_ptr->error_fn != NULL) - (*(png_ptr->error_fn))(png_ptr, ""); + (*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), ""); /* If the custom handler doesn't exist, or if it returns, use the default handler, which will not return. */ png_default_error(png_ptr, ""); } -#endif /* PNG_ERROR_TEXT_SUPPORTED */ +#endif /* ERROR_TEXT */ /* Utility to safely appends strings to a buffer. This never errors out so * error checking is not required in the caller. @@ -150,7 +152,7 @@ png_format_number(png_const_charp start, png_charp end, int format, case PNG_NUMBER_FORMAT_fixed: /* Needs five digits (the fraction) */ mincount = 5; - if (output || number % 10 != 0) + if (output != 0 || number % 10 != 0) { *--end = digits[number % 10]; output = 1; @@ -187,7 +189,7 @@ png_format_number(png_const_charp start, png_charp end, int format, ++count; /* Float a fixed number here: */ - if (format == PNG_NUMBER_FORMAT_fixed) if (count == 5) if (end > start) + if ((format == PNG_NUMBER_FORMAT_fixed) && (count == 5) && (end > start)) { /* End of the fraction, but maybe nothing was output? In that case * drop the decimal point. If the number is a true zero handle that @@ -211,14 +213,14 @@ png_format_number(png_const_charp start, png_charp end, int format, * png_set_error_fn() to replace the warning function at run-time. */ void PNGAPI -png_warning(png_structp png_ptr, png_const_charp warning_message) +png_warning(png_const_structrp png_ptr, png_const_charp warning_message) { int offset = 0; if (png_ptr != NULL) { #ifdef PNG_ERROR_NUMBERS_SUPPORTED - if (png_ptr->flags& - (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) + if ((png_ptr->flags & + (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) != 0) #endif { if (*warning_message == PNG_LITERAL_SHARP) @@ -230,7 +232,8 @@ png_warning(png_structp png_ptr, png_const_charp warning_message) } } if (png_ptr != NULL && png_ptr->warning_fn != NULL) - (*(png_ptr->warning_fn))(png_ptr, warning_message + offset); + (*(png_ptr->warning_fn))(png_constcast(png_structrp,png_ptr), + warning_message + offset); else png_default_warning(png_ptr, warning_message + offset); } @@ -278,7 +281,7 @@ png_warning_parameter_signed(png_warning_parameters p, int number, int format, } void -png_formatted_warning(png_structp png_ptr, png_warning_parameters p, +png_formatted_warning(png_const_structrp png_ptr, png_warning_parameters p, png_const_charp message) { /* The internal buffer is just 192 bytes - enough for all our messages, @@ -346,29 +349,79 @@ png_formatted_warning(png_structp png_ptr, png_warning_parameters p, /* i is always less than (sizeof msg), so: */ msg[i] = '\0'; - /* And this is the formatted message, it may be larger than - * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these are - * not (currently) formatted. + /* And this is the formatted message. It may be larger than + * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these + * are not (currently) formatted. */ png_warning(png_ptr, msg); } -#endif /* PNG_WARNINGS_SUPPORTED */ +#endif /* WARNINGS */ #ifdef PNG_BENIGN_ERRORS_SUPPORTED void PNGAPI -png_benign_error(png_structp png_ptr, png_const_charp error_message) +png_benign_error(png_const_structrp png_ptr, png_const_charp error_message) { - if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) + if ((png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) != 0) + { +# ifdef PNG_READ_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 && + png_ptr->chunk_name != 0) + png_chunk_warning(png_ptr, error_message); + else +# endif + png_warning(png_ptr, error_message); + } + + else + { +# ifdef PNG_READ_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 && + png_ptr->chunk_name != 0) + png_chunk_error(png_ptr, error_message); + else +# endif + png_error(png_ptr, error_message); + } + +# ifndef PNG_ERROR_TEXT_SUPPORTED + PNG_UNUSED(error_message) +# endif +} + +void /* PRIVATE */ +png_app_warning(png_const_structrp png_ptr, png_const_charp error_message) +{ + if ((png_ptr->flags & PNG_FLAG_APP_WARNINGS_WARN) != 0) png_warning(png_ptr, error_message); else png_error(png_ptr, error_message); + +# ifndef PNG_ERROR_TEXT_SUPPORTED + PNG_UNUSED(error_message) +# endif } -#endif +void /* PRIVATE */ +png_app_error(png_const_structrp png_ptr, png_const_charp error_message) +{ + if ((png_ptr->flags & PNG_FLAG_APP_ERRORS_WARN) != 0) + png_warning(png_ptr, error_message); + else + png_error(png_ptr, error_message); + +# ifndef PNG_ERROR_TEXT_SUPPORTED + PNG_UNUSED(error_message) +# endif +} +#endif /* BENIGN_ERRORS */ + +#define PNG_MAX_ERROR_TEXT 196 /* Currently limited by profile_error in png.c */ +#if defined(PNG_WARNINGS_SUPPORTED) || \ + (defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)) /* These utilities are used internally to build an error message that relates * to the current chunk. The chunk name comes from png_ptr->chunk_name, - * this is used to prefix the message. The message is limited in length - * to 63 bytes, the name characters are output as hex digits wrapped in [] + * which is used to prefix the message. The message is limited in length + * to 63 bytes. The name characters are output as hex digits wrapped in [] * if the character is invalid. */ #define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) @@ -377,10 +430,8 @@ static PNG_CONST char png_digit[16] = { 'A', 'B', 'C', 'D', 'E', 'F' }; -#define PNG_MAX_ERROR_TEXT 64 -#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED) static void /* PRIVATE */ -png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp +png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp error_message) { png_uint_32 chunk_name = png_ptr->chunk_name; @@ -391,7 +442,7 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp int c = (int)(chunk_name >> ishift) & 0xff; ishift -= 8; - if (isnonalpha(c)) + if (isnonalpha(c) != 0) { buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET; buffer[iout++] = png_digit[(c & 0xf0) >> 4]; @@ -422,11 +473,11 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp buffer[iout] = '\0'; } } -#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */ +#endif /* WARNINGS || ERROR_TEXT */ #if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) PNG_FUNCTION(void,PNGAPI -png_chunk_error,(png_structp png_ptr, png_const_charp error_message), +png_chunk_error,(png_const_structrp png_ptr, png_const_charp error_message), PNG_NORETURN) { char msg[18+PNG_MAX_ERROR_TEXT]; @@ -439,11 +490,11 @@ png_chunk_error,(png_structp png_ptr, png_const_charp error_message), png_error(png_ptr, msg); } } -#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */ +#endif /* READ && ERROR_TEXT */ #ifdef PNG_WARNINGS_SUPPORTED void PNGAPI -png_chunk_warning(png_structp png_ptr, png_const_charp warning_message) +png_chunk_warning(png_const_structrp png_ptr, png_const_charp warning_message) { char msg[18+PNG_MAX_ERROR_TEXT]; if (png_ptr == NULL) @@ -455,38 +506,83 @@ png_chunk_warning(png_structp png_ptr, png_const_charp warning_message) png_warning(png_ptr, msg); } } -#endif /* PNG_WARNINGS_SUPPORTED */ +#endif /* WARNINGS */ #ifdef PNG_READ_SUPPORTED #ifdef PNG_BENIGN_ERRORS_SUPPORTED void PNGAPI -png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message) +png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp + error_message) { - if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) + if ((png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) != 0) png_chunk_warning(png_ptr, error_message); else png_chunk_error(png_ptr, error_message); + +# ifndef PNG_ERROR_TEXT_SUPPORTED + PNG_UNUSED(error_message) +# endif } #endif -#endif /* PNG_READ_SUPPORTED */ +#endif /* READ */ + +void /* PRIVATE */ +png_chunk_report(png_const_structrp png_ptr, png_const_charp message, int error) +{ +# ifndef PNG_WARNINGS_SUPPORTED + PNG_UNUSED(message) +# endif + + /* This is always supported, but for just read or just write it + * unconditionally does the right thing. + */ +# if defined(PNG_READ_SUPPORTED) && defined(PNG_WRITE_SUPPORTED) + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) +# endif + +# ifdef PNG_READ_SUPPORTED + { + if (error < PNG_CHUNK_ERROR) + png_chunk_warning(png_ptr, message); + + else + png_chunk_benign_error(png_ptr, message); + } +# endif + +# if defined(PNG_READ_SUPPORTED) && defined(PNG_WRITE_SUPPORTED) + else if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) +# endif + +# ifdef PNG_WRITE_SUPPORTED + { + if (error < PNG_CHUNK_WRITE_ERROR) + png_app_warning(png_ptr, message); + + else + png_app_error(png_ptr, message); + } +# endif +} #ifdef PNG_ERROR_TEXT_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED PNG_FUNCTION(void, -png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN) +png_fixed_error,(png_const_structrp png_ptr, png_const_charp name),PNG_NORETURN) { # define fixed_message "fixed point overflow in " # define fixed_message_ln ((sizeof fixed_message)-1) int iin; char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT]; - png_memcpy(msg, fixed_message, fixed_message_ln); + memcpy(msg, fixed_message, fixed_message_ln); iin = 0; - if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0) - { - msg[fixed_message_ln + iin] = name[iin]; - ++iin; - } + if (name != NULL) + while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0) + { + msg[fixed_message_ln + iin] = name[iin]; + ++iin; + } msg[fixed_message_ln + iin] = 0; png_error(png_ptr, msg); } @@ -498,14 +594,111 @@ png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN) * otherwise it is necessary for png_default_error to be overridden. */ jmp_buf* PNGAPI -png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn, +png_set_longjmp_fn(png_structrp png_ptr, png_longjmp_ptr longjmp_fn, size_t jmp_buf_size) { - if (png_ptr == NULL || jmp_buf_size != png_sizeof(jmp_buf)) + /* From libpng 1.6.0 the app gets one chance to set a 'jmpbuf_size' value + * and it must not change after that. Libpng doesn't care how big the + * buffer is, just that it doesn't change. + * + * If the buffer size is no *larger* than the size of jmp_buf when libpng is + * compiled a built in jmp_buf is returned; this preserves the pre-1.6.0 + * semantics that this call will not fail. If the size is larger, however, + * the buffer is allocated and this may fail, causing the function to return + * NULL. + */ + if (png_ptr == NULL) return NULL; + if (png_ptr->jmp_buf_ptr == NULL) + { + png_ptr->jmp_buf_size = 0; /* not allocated */ + + if (jmp_buf_size <= (sizeof png_ptr->jmp_buf_local)) + png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local; + + else + { + png_ptr->jmp_buf_ptr = png_voidcast(jmp_buf *, + png_malloc_warn(png_ptr, jmp_buf_size)); + + if (png_ptr->jmp_buf_ptr == NULL) + return NULL; /* new NULL return on OOM */ + + png_ptr->jmp_buf_size = jmp_buf_size; + } + } + + else /* Already allocated: check the size */ + { + size_t size = png_ptr->jmp_buf_size; + + if (size == 0) + { + size = (sizeof png_ptr->jmp_buf_local); + if (png_ptr->jmp_buf_ptr != &png_ptr->jmp_buf_local) + { + /* This is an internal error in libpng: somehow we have been left + * with a stack allocated jmp_buf when the application regained + * control. It's always possible to fix this up, but for the moment + * this is a png_error because that makes it easy to detect. + */ + png_error(png_ptr, "Libpng jmp_buf still allocated"); + /* png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local; */ + } + } + + if (size != jmp_buf_size) + { + png_warning(png_ptr, "Application jmp_buf size changed"); + return NULL; /* caller will probably crash: no choice here */ + } + } + + /* Finally fill in the function, now we have a satisfactory buffer. It is + * valid to change the function on every call. + */ png_ptr->longjmp_fn = longjmp_fn; - return &png_ptr->longjmp_buffer; + return png_ptr->jmp_buf_ptr; +} + +void /* PRIVATE */ +png_free_jmpbuf(png_structrp png_ptr) +{ + if (png_ptr != NULL) + { + jmp_buf *jb = png_ptr->jmp_buf_ptr; + + /* A size of 0 is used to indicate a local, stack, allocation of the + * pointer; used here and in png.c + */ + if (jb != NULL && png_ptr->jmp_buf_size > 0) + { + + /* This stuff is so that a failure to free the error control structure + * does not leave libpng in a state with no valid error handling: the + * free always succeeds, if there is an error it gets ignored. + */ + if (jb != &png_ptr->jmp_buf_local) + { + /* Make an internal, libpng, jmp_buf to return here */ + jmp_buf free_jmp_buf; + + if (!setjmp(free_jmp_buf)) + { + png_ptr->jmp_buf_ptr = &free_jmp_buf; /* come back here */ + png_ptr->jmp_buf_size = 0; /* stack allocation */ + png_ptr->longjmp_fn = longjmp; + png_free(png_ptr, jb); /* Return to setjmp on error */ + } + } + } + + /* *Always* cancel everything out: */ + png_ptr->jmp_buf_size = 0; + png_ptr->jmp_buf_ptr = NULL; + png_ptr->longjmp_fn = 0; + } } #endif @@ -515,7 +708,7 @@ png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn, * error function pointer in png_set_error_fn(). */ static PNG_FUNCTION(void /* PRIVATE */, -png_default_error,(png_structp png_ptr, png_const_charp error_message), +png_default_error,(png_const_structrp png_ptr, png_const_charp error_message), PNG_NORETURN) { #ifdef PNG_CONSOLE_IO_SUPPORTED @@ -562,27 +755,23 @@ png_default_error,(png_structp png_ptr, png_const_charp error_message), } PNG_FUNCTION(void,PNGAPI -png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN) +png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN) { #ifdef PNG_SETJMP_SUPPORTED - if (png_ptr && png_ptr->longjmp_fn) - { -# ifdef USE_FAR_KEYWORD - { - jmp_buf tmp_jmpbuf; - png_memcpy(tmp_jmpbuf, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); - png_ptr->longjmp_fn(tmp_jmpbuf, val); - } - -# else - png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val); -# endif - } + if (png_ptr != NULL && png_ptr->longjmp_fn != NULL && + png_ptr->jmp_buf_ptr != NULL) + png_ptr->longjmp_fn(*png_ptr->jmp_buf_ptr, val); #else - PNG_UNUSED(png_ptr); - PNG_UNUSED(val); + PNG_UNUSED(png_ptr) + PNG_UNUSED(val) #endif - /* Here if not setjmp support or if png_ptr is null. */ + + /* If control reaches this point, png_longjmp() must not return. The only + * choice is to terminate the whole process (or maybe the thread); to do + * this the ANSI-C abort() function is used unless a different method is + * implemented by overriding the default configuration setting for + * PNG_ABORT(). + */ PNG_ABORT(); } @@ -593,7 +782,7 @@ png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN) * not used, but it is passed in case it may be useful. */ static void /* PRIVATE */ -png_default_warning(png_structp png_ptr, png_const_charp warning_message) +png_default_warning(png_const_structrp png_ptr, png_const_charp warning_message) { #ifdef PNG_CONSOLE_IO_SUPPORTED # ifdef PNG_ERROR_NUMBERS_SUPPORTED @@ -635,15 +824,15 @@ png_default_warning(png_structp png_ptr, png_const_charp warning_message) #endif PNG_UNUSED(png_ptr) /* Make compiler happy */ } -#endif /* PNG_WARNINGS_SUPPORTED */ +#endif /* WARNINGS */ /* This function is called when the application wants to use another method * of handling errors and warnings. Note that the error function MUST NOT * return to the calling routine or serious problems will occur. The return - * method used in the default routine calls longjmp(png_ptr->longjmp_buffer, 1) + * method used in the default routine calls longjmp(png_ptr->jmp_buf_ptr, 1) */ void PNGAPI -png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, +png_set_error_fn(png_structrp png_ptr, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn) { if (png_ptr == NULL) @@ -664,7 +853,7 @@ png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, * pointer before png_write_destroy and png_read_destroy are called. */ png_voidp PNGAPI -png_get_error_ptr(png_const_structp png_ptr) +png_get_error_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return NULL; @@ -675,7 +864,7 @@ png_get_error_ptr(png_const_structp png_ptr) #ifdef PNG_ERROR_NUMBERS_SUPPORTED void PNGAPI -png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode) +png_set_strip_error_numbers(png_structrp png_ptr, png_uint_32 strip_mode) { if (png_ptr != NULL) { @@ -685,4 +874,90 @@ png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode) } } #endif -#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ + +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) + /* Currently the above both depend on SETJMP_SUPPORTED, however it would be + * possible to implement without setjmp support just so long as there is some + * way to handle the error return here: + */ +PNG_FUNCTION(void /* PRIVATE */, (PNGCBAPI +png_safe_error),(png_structp png_nonconst_ptr, png_const_charp error_message), + PNG_NORETURN) +{ + const png_const_structrp png_ptr = png_nonconst_ptr; + png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr); + + /* An error is always logged here, overwriting anything (typically a warning) + * that is already there: + */ + if (image != NULL) + { + png_safecat(image->message, (sizeof image->message), 0, error_message); + image->warning_or_error |= PNG_IMAGE_ERROR; + + /* Retrieve the jmp_buf from within the png_control, making this work for + * C++ compilation too is pretty tricky: C++ wants a pointer to the first + * element of a jmp_buf, but C doesn't tell us the type of that. + */ + if (image->opaque != NULL && image->opaque->error_buf != NULL) + longjmp(png_control_jmp_buf(image->opaque), 1); + + /* Missing longjmp buffer, the following is to help debugging: */ + { + size_t pos = png_safecat(image->message, (sizeof image->message), 0, + "bad longjmp: "); + png_safecat(image->message, (sizeof image->message), pos, + error_message); + } + } + + /* Here on an internal programming error. */ + abort(); +} + +#ifdef PNG_WARNINGS_SUPPORTED +void /* PRIVATE */ PNGCBAPI +png_safe_warning(png_structp png_nonconst_ptr, png_const_charp warning_message) +{ + const png_const_structrp png_ptr = png_nonconst_ptr; + png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr); + + /* A warning is only logged if there is no prior warning or error. */ + if (image->warning_or_error == 0) + { + png_safecat(image->message, (sizeof image->message), 0, warning_message); + image->warning_or_error |= PNG_IMAGE_WARNING; + } +} +#endif + +int /* PRIVATE */ +png_safe_execute(png_imagep image_in, int (*function)(png_voidp), png_voidp arg) +{ + volatile png_imagep image = image_in; + volatile int result; + volatile png_voidp saved_error_buf; + jmp_buf safe_jmpbuf; + + /* Safely execute function(arg) with png_error returning to this function. */ + saved_error_buf = image->opaque->error_buf; + result = setjmp(safe_jmpbuf) == 0; + + if (result != 0) + { + + image->opaque->error_buf = safe_jmpbuf; + result = function(arg); + } + + image->opaque->error_buf = saved_error_buf; + + /* And do the cleanup prior to any failure return. */ + if (result == 0) + png_image_free(image); + + return result; +} +#endif /* SIMPLIFIED READ || SIMPLIFIED_WRITE */ +#endif /* READ || WRITE */ diff --git a/drivers/png/pngget.c b/drivers/png/pngget.c index 5b1d757c66..14fc7be520 100644 --- a/drivers/png/pngget.c +++ b/drivers/png/pngget.c @@ -1,8 +1,8 @@ /* pngget.c - retrieval of values from info struct * - * Last changed in libpng 1.5.19 [August 21, 2014] - * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson + * Last changed in libpng 1.6.17 [March 26, 2015] + * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -17,7 +17,7 @@ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) png_uint_32 PNGAPI -png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_valid(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 flag) { if (png_ptr != NULL && info_ptr != NULL) @@ -27,7 +27,7 @@ png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr, } png_size_t PNGAPI -png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_rowbytes(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->rowbytes); @@ -37,7 +37,7 @@ png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr) #ifdef PNG_INFO_IMAGE_SUPPORTED png_bytepp PNGAPI -png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_rows(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->row_pointers); @@ -49,7 +49,7 @@ png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr) #ifdef PNG_EASY_ACCESS_SUPPORTED /* Easy access to info, added in libpng-0.99 */ png_uint_32 PNGAPI -png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_image_width(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->width; @@ -58,7 +58,7 @@ png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr) } png_uint_32 PNGAPI -png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_image_height(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->height; @@ -67,7 +67,7 @@ png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr) } png_byte PNGAPI -png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_bit_depth(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->bit_depth; @@ -76,7 +76,7 @@ png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr) } png_byte PNGAPI -png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_color_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->color_type; @@ -85,7 +85,7 @@ png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr) } png_byte PNGAPI -png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_filter_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->filter_type; @@ -94,7 +94,7 @@ png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr) } png_byte PNGAPI -png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_interlace_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->interlace_type; @@ -103,7 +103,7 @@ png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr) } png_byte PNGAPI -png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_compression_type(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return info_ptr->compression_type; @@ -112,10 +112,12 @@ png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr) } png_uint_32 PNGAPI -png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp + info_ptr) { #ifdef PNG_pHYs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pHYs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter"); @@ -132,10 +134,12 @@ png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) } png_uint_32 PNGAPI -png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp + info_ptr) { #ifdef PNG_pHYs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pHYs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter"); @@ -152,10 +156,11 @@ png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) } png_uint_32 PNGAPI -png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_pHYs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pHYs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter"); @@ -173,10 +178,12 @@ png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) #ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_pixel_aspect_ratio(png_const_structrp png_ptr, png_const_inforp + info_ptr) { #ifdef PNG_READ_pHYs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pHYs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio"); @@ -195,14 +202,15 @@ png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr) #ifdef PNG_FIXED_POINT_SUPPORTED png_fixed_point PNGAPI -png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr, - png_const_infop info_ptr) +png_get_pixel_aspect_ratio_fixed(png_const_structrp png_ptr, + png_const_inforp info_ptr) { #ifdef PNG_READ_pHYs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs) - && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 - && info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX - && info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pHYs) != 0 && + info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 && + info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX && + info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX) { png_fixed_point res; @@ -212,7 +220,7 @@ png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr, * range of 0..2^31-1; otherwise the cast might overflow. */ if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1, - (png_int_32)info_ptr->x_pixels_per_unit)) + (png_int_32)info_ptr->x_pixels_per_unit) != 0) return res; } #else @@ -225,10 +233,11 @@ png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr, #endif png_int_32 PNGAPI -png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_oFFs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); @@ -244,10 +253,11 @@ png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) } png_int_32 PNGAPI -png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_oFFs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); @@ -263,10 +273,11 @@ png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) } png_int_32 PNGAPI -png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_oFFs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels"); @@ -282,10 +293,11 @@ png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) } png_int_32 PNGAPI -png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr) { #ifdef PNG_oFFs_SUPPORTED - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_oFFs) != 0) { png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels"); @@ -325,7 +337,7 @@ ppi_from_ppm(png_uint_32 ppm) */ png_fixed_point result; if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127, - 5000)) + 5000) != 0) return result; /* Overflow. */ @@ -334,26 +346,26 @@ ppi_from_ppm(png_uint_32 ppm) } png_uint_32 PNGAPI -png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) { return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr)); } png_uint_32 PNGAPI -png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) { return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr)); } png_uint_32 PNGAPI -png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_pixels_per_inch(png_const_structrp png_ptr, png_const_inforp info_ptr) { return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr)); } #ifdef PNG_FIXED_POINT_SUPPORTED static png_fixed_point -png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns) +png_fixed_inches_from_microns(png_const_structrp png_ptr, png_int_32 microns) { /* Convert from metres * 1,000,000 to inches * 100,000, meters to * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127. @@ -364,8 +376,8 @@ png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns) } png_fixed_point PNGAPI -png_get_x_offset_inches_fixed(png_structp png_ptr, - png_const_infop info_ptr) +png_get_x_offset_inches_fixed(png_const_structrp png_ptr, + png_const_inforp info_ptr) { return png_fixed_inches_from_microns(png_ptr, png_get_x_offset_microns(png_ptr, info_ptr)); @@ -374,8 +386,8 @@ png_get_x_offset_inches_fixed(png_structp png_ptr, #ifdef PNG_FIXED_POINT_SUPPORTED png_fixed_point PNGAPI -png_get_y_offset_inches_fixed(png_structp png_ptr, - png_const_infop info_ptr) +png_get_y_offset_inches_fixed(png_const_structrp png_ptr, + png_const_inforp info_ptr) { return png_fixed_inches_from_microns(png_ptr, png_get_y_offset_microns(png_ptr, info_ptr)); @@ -384,7 +396,7 @@ png_get_y_offset_inches_fixed(png_structp png_ptr, #ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_x_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr) { /* To avoid the overflow do the conversion directly in floating * point. @@ -395,7 +407,7 @@ png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) #ifdef PNG_FLOATING_POINT_SUPPORTED float PNGAPI -png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_y_offset_inches(png_const_structrp png_ptr, png_const_inforp info_ptr) { /* To avoid the overflow do the conversion directly in floating * point. @@ -406,12 +418,13 @@ png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) #ifdef PNG_pHYs_SUPPORTED png_uint_32 PNGAPI -png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) { png_uint_32 retval = 0; - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pHYs) != 0) { png_debug1(1, "in %s retrieval function", "pHYs"); @@ -442,15 +455,16 @@ png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr, return (retval); } -#endif /* PNG_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ +#endif /* pHYs */ +#endif /* INCH_CONVERSIONS */ /* png_get_channels really belongs in here, too, but it's been around longer */ -#endif /* PNG_EASY_ACCESS_SUPPORTED */ +#endif /* EASY_ACCESS */ + png_byte PNGAPI -png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr) +png_get_channels(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->channels); @@ -458,22 +472,25 @@ png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr) return (0); } +#ifdef PNG_READ_SUPPORTED png_const_bytep PNGAPI -png_get_signature(png_const_structp png_ptr, png_infop info_ptr) +png_get_signature(png_const_structrp png_ptr, png_const_inforp info_ptr) { if (png_ptr != NULL && info_ptr != NULL) return(info_ptr->signature); return (NULL); } +#endif #ifdef PNG_bKGD_SUPPORTED png_uint_32 PNGAPI -png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr, +png_get_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, png_color_16p *background) { - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) - && background != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_bKGD) != 0 && + background != NULL) { png_debug1(1, "in %s retrieval function", "bKGD"); @@ -490,87 +507,47 @@ png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr, * same time to correct the rgb grayscale coefficient defaults obtained from the * cHRM chunk in 1.5.4 */ -png_uint_32 PNGFAPI -png_get_cHRM_XYZ_fixed(png_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_red_X, png_fixed_point *int_red_Y, - png_fixed_point *int_red_Z, png_fixed_point *int_green_X, - png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, - png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, - png_fixed_point *int_blue_Z) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - { - png_xy xy; - png_XYZ XYZ; - - png_debug1(1, "in %s retrieval function", "cHRM_XYZ"); - - xy.whitex = info_ptr->x_white; - xy.whitey = info_ptr->y_white; - xy.redx = info_ptr->x_red; - xy.redy = info_ptr->y_red; - xy.greenx = info_ptr->x_green; - xy.greeny = info_ptr->y_green; - xy.bluex = info_ptr->x_blue; - xy.bluey = info_ptr->y_blue; - - /* The *_checked function handles error reporting, so just return 0 if - * there is a failure here. - */ - if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) - { - if (int_red_X != NULL) - *int_red_X = XYZ.redX; - if (int_red_Y != NULL) - *int_red_Y = XYZ.redY; - if (int_red_Z != NULL) - *int_red_Z = XYZ.redZ; - if (int_green_X != NULL) - *int_green_X = XYZ.greenX; - if (int_green_Y != NULL) - *int_green_Y = XYZ.greenY; - if (int_green_Z != NULL) - *int_green_Z = XYZ.greenZ; - if (int_blue_X != NULL) - *int_blue_X = XYZ.blueX; - if (int_blue_Y != NULL) - *int_blue_Y = XYZ.blueY; - if (int_blue_Z != NULL) - *int_blue_Z = XYZ.blueZ; - - return (PNG_INFO_cHRM); - } - } - - return (0); -} - # ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_cHRM(png_const_structrp png_ptr, png_const_inforp info_ptr, double *white_x, double *white_y, double *red_x, double *red_y, double *green_x, double *green_y, double *blue_x, double *blue_y) { - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + /* Quiet API change: this code used to only return the end points if a cHRM + * chunk was present, but the end points can also come from iCCP or sRGB + * chunks, so in 1.6.0 the png_get_ APIs return the end points regardless and + * the png_set_ APIs merely check that set end points are mutually + * consistent. + */ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) { png_debug1(1, "in %s retrieval function", "cHRM"); if (white_x != NULL) - *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X"); + *white_x = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.whitex, "cHRM white X"); if (white_y != NULL) - *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y"); + *white_y = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.whitey, "cHRM white Y"); if (red_x != NULL) - *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X"); + *red_x = png_float(png_ptr, info_ptr->colorspace.end_points_xy.redx, + "cHRM red X"); if (red_y != NULL) - *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y"); + *red_y = png_float(png_ptr, info_ptr->colorspace.end_points_xy.redy, + "cHRM red Y"); if (green_x != NULL) - *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X"); + *green_x = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.greenx, "cHRM green X"); if (green_y != NULL) - *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y"); + *green_y = png_float(png_ptr, + info_ptr->colorspace.end_points_xy.greeny, "cHRM green Y"); if (blue_x != NULL) - *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X"); + *blue_x = png_float(png_ptr, info_ptr->colorspace.end_points_xy.bluex, + "cHRM blue X"); if (blue_y != NULL) - *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y"); + *blue_y = png_float(png_ptr, info_ptr->colorspace.end_points_xy.bluey, + "cHRM blue Y"); return (PNG_INFO_cHRM); } @@ -578,35 +555,43 @@ png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr, } png_uint_32 PNGAPI -png_get_cHRM_XYZ(png_structp png_ptr, png_const_infop info_ptr, +png_get_cHRM_XYZ(png_const_structrp png_ptr, png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z, double *green_X, double *green_Y, double *green_Z, double *blue_X, double *blue_Y, double *blue_Z) { - png_XYZ XYZ; - - if (png_get_cHRM_XYZ_fixed(png_ptr, info_ptr, - &XYZ.redX, &XYZ.redY, &XYZ.redZ, &XYZ.greenX, &XYZ.greenY, &XYZ.greenZ, - &XYZ.blueX, &XYZ.blueY, &XYZ.blueZ) & PNG_INFO_cHRM) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) { + png_debug1(1, "in %s retrieval function", "cHRM_XYZ(float)"); + if (red_X != NULL) - *red_X = png_float(png_ptr, XYZ.redX, "cHRM red X"); + *red_X = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.red_X, + "cHRM red X"); if (red_Y != NULL) - *red_Y = png_float(png_ptr, XYZ.redY, "cHRM red Y"); + *red_Y = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.red_Y, + "cHRM red Y"); if (red_Z != NULL) - *red_Z = png_float(png_ptr, XYZ.redZ, "cHRM red Z"); + *red_Z = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.red_Z, + "cHRM red Z"); if (green_X != NULL) - *green_X = png_float(png_ptr, XYZ.greenX, "cHRM green X"); + *green_X = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.green_X, "cHRM green X"); if (green_Y != NULL) - *green_Y = png_float(png_ptr, XYZ.greenY, "cHRM green Y"); + *green_Y = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.green_Y, "cHRM green Y"); if (green_Z != NULL) - *green_Z = png_float(png_ptr, XYZ.greenZ, "cHRM green Z"); + *green_Z = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.green_Z, "cHRM green Z"); if (blue_X != NULL) - *blue_X = png_float(png_ptr, XYZ.blueX, "cHRM blue X"); + *blue_X = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.blue_X, "cHRM blue X"); if (blue_Y != NULL) - *blue_Y = png_float(png_ptr, XYZ.blueY, "cHRM blue Y"); + *blue_Y = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.blue_Y, "cHRM blue Y"); if (blue_Z != NULL) - *blue_Z = png_float(png_ptr, XYZ.blueZ, "cHRM blue Z"); + *blue_Z = png_float(png_ptr, + info_ptr->colorspace.end_points_XYZ.blue_Z, "cHRM blue Z"); return (PNG_INFO_cHRM); } @@ -616,31 +601,69 @@ png_get_cHRM_XYZ(png_structp png_ptr, png_const_infop info_ptr, # ifdef PNG_FIXED_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, + png_fixed_point *int_red_X, png_fixed_point *int_red_Y, + png_fixed_point *int_red_Z, png_fixed_point *int_green_X, + png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, + png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, + png_fixed_point *int_blue_Z) +{ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) + { + png_debug1(1, "in %s retrieval function", "cHRM_XYZ"); + + if (int_red_X != NULL) + *int_red_X = info_ptr->colorspace.end_points_XYZ.red_X; + if (int_red_Y != NULL) + *int_red_Y = info_ptr->colorspace.end_points_XYZ.red_Y; + if (int_red_Z != NULL) + *int_red_Z = info_ptr->colorspace.end_points_XYZ.red_Z; + if (int_green_X != NULL) + *int_green_X = info_ptr->colorspace.end_points_XYZ.green_X; + if (int_green_Y != NULL) + *int_green_Y = info_ptr->colorspace.end_points_XYZ.green_Y; + if (int_green_Z != NULL) + *int_green_Z = info_ptr->colorspace.end_points_XYZ.green_Z; + if (int_blue_X != NULL) + *int_blue_X = info_ptr->colorspace.end_points_XYZ.blue_X; + if (int_blue_Y != NULL) + *int_blue_Y = info_ptr->colorspace.end_points_XYZ.blue_Y; + if (int_blue_Z != NULL) + *int_blue_Z = info_ptr->colorspace.end_points_XYZ.blue_Z; + return (PNG_INFO_cHRM); + } + + return (0); +} + +png_uint_32 PNGAPI +png_get_cHRM_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, png_fixed_point *blue_x, png_fixed_point *blue_y) { png_debug1(1, "in %s retrieval function", "cHRM"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) { if (white_x != NULL) - *white_x = info_ptr->x_white; + *white_x = info_ptr->colorspace.end_points_xy.whitex; if (white_y != NULL) - *white_y = info_ptr->y_white; + *white_y = info_ptr->colorspace.end_points_xy.whitey; if (red_x != NULL) - *red_x = info_ptr->x_red; + *red_x = info_ptr->colorspace.end_points_xy.redx; if (red_y != NULL) - *red_y = info_ptr->y_red; + *red_y = info_ptr->colorspace.end_points_xy.redy; if (green_x != NULL) - *green_x = info_ptr->x_green; + *green_x = info_ptr->colorspace.end_points_xy.greenx; if (green_y != NULL) - *green_y = info_ptr->y_green; + *green_y = info_ptr->colorspace.end_points_xy.greeny; if (blue_x != NULL) - *blue_x = info_ptr->x_blue; + *blue_x = info_ptr->colorspace.end_points_xy.bluex; if (blue_y != NULL) - *blue_y = info_ptr->y_blue; + *blue_y = info_ptr->colorspace.end_points_xy.bluey; return (PNG_INFO_cHRM); } @@ -650,49 +673,57 @@ png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr, #endif #ifdef PNG_gAMA_SUPPORTED -png_uint_32 PNGFAPI -png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr, +# ifdef PNG_FIXED_POINT_SUPPORTED +png_uint_32 PNGAPI +png_get_gAMA_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *file_gamma) { png_debug1(1, "in %s retrieval function", "gAMA"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) - && file_gamma != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) != 0 && + file_gamma != NULL) { - *file_gamma = info_ptr->gamma; + *file_gamma = info_ptr->colorspace.gamma; return (PNG_INFO_gAMA); } return (0); } +# endif + # ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_gAMA(png_const_structrp png_ptr, png_const_inforp info_ptr, double *file_gamma) { - png_fixed_point igamma; - png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma); + png_debug1(1, "in %s retrieval function", "gAMA(float)"); - if (ok != 0) - *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA"); + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) != 0 && + file_gamma != NULL) + { + *file_gamma = png_float(png_ptr, info_ptr->colorspace.gamma, + "png_get_gAMA"); + return (PNG_INFO_gAMA); + } - return ok; + return (0); } - # endif #endif #ifdef PNG_sRGB_SUPPORTED png_uint_32 PNGAPI -png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_sRGB(png_const_structrp png_ptr, png_const_inforp info_ptr, int *file_srgb_intent) { png_debug1(1, "in %s retrieval function", "sRGB"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) - && file_srgb_intent != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sRGB) != 0 && file_srgb_intent != NULL) { - *file_srgb_intent = (int)info_ptr->srgb_intent; + *file_srgb_intent = info_ptr->colorspace.rendering_intent; return (PNG_INFO_sRGB); } @@ -702,23 +733,24 @@ png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_iCCP_SUPPORTED png_uint_32 PNGAPI -png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, png_charpp name, int *compression_type, png_bytepp profile, png_uint_32 *proflen) { png_debug1(1, "in %s retrieval function", "iCCP"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP) - && name != NULL && compression_type != NULL && profile != NULL && - proflen != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_iCCP) != 0 && + name != NULL && compression_type != NULL && profile != NULL && + proflen != NULL) { *name = info_ptr->iccp_name; *profile = info_ptr->iccp_profile; - /* Compression_type is a dummy so the API won't have to change - * if we introduce multiple compression types later. + *proflen = png_get_uint_32(info_ptr->iccp_profile); + /* This is somewhat irrelevant since the profile data returned has + * actually been uncompressed. */ - *proflen = info_ptr->iccp_proflen; - *compression_type = info_ptr->iccp_compression; + *compression_type = PNG_COMPRESSION_TYPE_BASE; return (PNG_INFO_iCCP); } @@ -727,14 +759,14 @@ png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr, #endif #ifdef PNG_sPLT_SUPPORTED -png_uint_32 PNGAPI -png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr, +int PNGAPI +png_get_sPLT(png_const_structrp png_ptr, png_inforp info_ptr, png_sPLT_tpp spalettes) { if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) { *spalettes = info_ptr->splt_palettes; - return ((png_uint_32)info_ptr->splt_palettes_num); + return info_ptr->splt_palettes_num; } return (0); @@ -743,13 +775,13 @@ png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_hIST_SUPPORTED png_uint_32 PNGAPI -png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_hIST(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_16p *hist) { png_debug1(1, "in %s retrieval function", "hIST"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) - && hist != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_hIST) != 0 && hist != NULL) { *hist = info_ptr->hist; return (PNG_INFO_hIST); @@ -760,11 +792,10 @@ png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr, #endif png_uint_32 PNGAPI -png_get_IHDR(png_structp png_ptr, png_infop info_ptr, +png_get_IHDR(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, int *interlace_type, int *compression_type, int *filter_type) - { png_debug1(1, "in %s retrieval function", "IHDR"); @@ -797,7 +828,7 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr, * application has ignored our advice not to mess with the members * of info_ptr directly. */ - png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, + png_check_IHDR(png_ptr, info_ptr->width, info_ptr->height, info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, info_ptr->compression_type, info_ptr->filter_type); @@ -806,13 +837,14 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_oFFs_SUPPORTED png_uint_32 PNGAPI -png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_oFFs(png_const_structrp png_ptr, png_const_inforp info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) { png_debug1(1, "in %s retrieval function", "oFFs"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) - && offset_x != NULL && offset_y != NULL && unit_type != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_oFFs) != 0 && + offset_x != NULL && offset_y != NULL && unit_type != NULL) { *offset_x = info_ptr->x_offset; *offset_y = info_ptr->y_offset; @@ -826,14 +858,15 @@ png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_pCAL_SUPPORTED png_uint_32 PNGAPI -png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, png_charp *units, png_charpp *params) { png_debug1(1, "in %s retrieval function", "pCAL"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL) - && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pCAL) != 0 && + purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && nparams != NULL && units != NULL && params != NULL) { *purpose = info_ptr->pcal_purpose; @@ -852,16 +885,20 @@ png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_sCAL_SUPPORTED # ifdef PNG_FIXED_POINT_SUPPORTED -# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +# if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \ + defined(PNG_FLOATING_POINT_SUPPORTED) png_uint_32 PNGAPI -png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr, +png_get_sCAL_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, png_fixed_point *width, png_fixed_point *height) { if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_sCAL)) + (info_ptr->valid & PNG_INFO_sCAL) != 0) { *unit = info_ptr->scal_unit; - /*TODO: make this work without FP support */ + /*TODO: make this work without FP support; the API is currently eliminated + * if neither floating point APIs nor internal floating point arithmetic + * are enabled. + */ *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width"); *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height), "sCAL height"); @@ -874,11 +911,11 @@ png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr, # endif /* FIXED_POINT */ # ifdef PNG_FLOATING_POINT_SUPPORTED png_uint_32 PNGAPI -png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_sCAL(png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, double *width, double *height) { if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_sCAL)) + (info_ptr->valid & PNG_INFO_sCAL) != 0) { *unit = info_ptr->scal_unit; *width = atof(info_ptr->scal_s_width); @@ -890,11 +927,11 @@ png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr, } # endif /* FLOATING POINT */ png_uint_32 PNGAPI -png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_sCAL_s(png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, png_charpp width, png_charpp height) { if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_sCAL)) + (info_ptr->valid & PNG_INFO_sCAL) != 0) { *unit = info_ptr->scal_unit; *width = info_ptr->scal_s_width; @@ -908,7 +945,7 @@ png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_pHYs_SUPPORTED png_uint_32 PNGAPI -png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_pHYs(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) { png_uint_32 retval = 0; @@ -916,7 +953,7 @@ png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr, png_debug1(1, "in %s retrieval function", "pHYs"); if (png_ptr != NULL && info_ptr != NULL && - (info_ptr->valid & PNG_INFO_pHYs)) + (info_ptr->valid & PNG_INFO_pHYs) != 0) { if (res_x != NULL) { @@ -942,13 +979,13 @@ png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr, #endif /* pHYs */ png_uint_32 PNGAPI -png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_PLTE(png_const_structrp png_ptr, png_inforp info_ptr, png_colorp *palette, int *num_palette) { png_debug1(1, "in %s retrieval function", "PLTE"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE) - && palette != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_PLTE) != 0 && palette != NULL) { *palette = info_ptr->palette; *num_palette = info_ptr->num_palette; @@ -961,13 +998,13 @@ png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_sBIT_SUPPORTED png_uint_32 PNGAPI -png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr, +png_get_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, png_color_8p *sig_bit) { png_debug1(1, "in %s retrieval function", "sBIT"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) - && sig_bit != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sBIT) != 0 && sig_bit != NULL) { *sig_bit = &(info_ptr->sig_bit); return (PNG_INFO_sBIT); @@ -978,8 +1015,8 @@ png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr, #endif #ifdef PNG_TEXT_SUPPORTED -png_uint_32 PNGAPI -png_get_text(png_const_structp png_ptr, png_const_infop info_ptr, +int PNGAPI +png_get_text(png_const_structrp png_ptr, png_inforp info_ptr, png_textp *text_ptr, int *num_text) { if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) @@ -993,7 +1030,7 @@ png_get_text(png_const_structp png_ptr, png_const_infop info_ptr, if (num_text != NULL) *num_text = info_ptr->num_text; - return ((png_uint_32)info_ptr->num_text); + return info_ptr->num_text; } if (num_text != NULL) @@ -1005,12 +1042,13 @@ png_get_text(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_tIME_SUPPORTED png_uint_32 PNGAPI -png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time) +png_get_tIME(png_const_structrp png_ptr, png_inforp info_ptr, + png_timep *mod_time) { png_debug1(1, "in %s retrieval function", "tIME"); - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) - && mod_time != NULL) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_tIME) != 0 && mod_time != NULL) { *mod_time = &(info_ptr->mod_time); return (PNG_INFO_tIME); @@ -1022,11 +1060,12 @@ png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time) #ifdef PNG_tRNS_SUPPORTED png_uint_32 PNGAPI -png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr, +png_get_tRNS(png_const_structrp png_ptr, png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color) { png_uint_32 retval = 0; - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_tRNS) != 0) { png_debug1(1, "in %s retrieval function", "tRNS"); @@ -1065,9 +1104,9 @@ png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr, } #endif -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED int PNGAPI -png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr, +png_get_unknown_chunks(png_const_structrp png_ptr, png_inforp info_ptr, png_unknown_chunkpp unknowns) { if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) @@ -1082,7 +1121,7 @@ png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr, #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED png_byte PNGAPI -png_get_rgb_to_gray_status (png_const_structp png_ptr) +png_get_rgb_to_gray_status (png_const_structrp png_ptr) { return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0); } @@ -1090,69 +1129,79 @@ png_get_rgb_to_gray_status (png_const_structp png_ptr) #ifdef PNG_USER_CHUNKS_SUPPORTED png_voidp PNGAPI -png_get_user_chunk_ptr(png_const_structp png_ptr) +png_get_user_chunk_ptr(png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_chunk_ptr : NULL); } #endif png_size_t PNGAPI -png_get_compression_buffer_size(png_const_structp png_ptr) +png_get_compression_buffer_size(png_const_structrp png_ptr) { - return (png_ptr ? png_ptr->zbuf_size : 0); + if (png_ptr == NULL) + return 0; + +#ifdef PNG_WRITE_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) +#endif + { +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED + return png_ptr->IDAT_read_size; +#else + return PNG_IDAT_READ_SIZE; +#endif + } + +#ifdef PNG_WRITE_SUPPORTED + else + return png_ptr->zbuffer_size; +#endif } #ifdef PNG_SET_USER_LIMITS_SUPPORTED /* These functions were added to libpng 1.2.6 and were enabled * by default in libpng-1.4.0 */ png_uint_32 PNGAPI -png_get_user_width_max (png_const_structp png_ptr) +png_get_user_width_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_width_max : 0); } png_uint_32 PNGAPI -png_get_user_height_max (png_const_structp png_ptr) +png_get_user_height_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_height_max : 0); } /* This function was added to libpng 1.4.0 */ png_uint_32 PNGAPI -png_get_chunk_cache_max (png_const_structp png_ptr) +png_get_chunk_cache_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_chunk_cache_max : 0); } /* This function was added to libpng 1.4.1 */ png_alloc_size_t PNGAPI -png_get_chunk_malloc_max (png_const_structp png_ptr) +png_get_chunk_malloc_max (png_const_structrp png_ptr) { return (png_ptr ? png_ptr->user_chunk_malloc_max : 0); } -#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ +#endif /* SET_USER_LIMITS */ /* These functions were added to libpng 1.4.0 */ #ifdef PNG_IO_STATE_SUPPORTED png_uint_32 PNGAPI -png_get_io_state (png_structp png_ptr) +png_get_io_state (png_const_structrp png_ptr) { return png_ptr->io_state; } png_uint_32 PNGAPI -png_get_io_chunk_type (png_const_structp png_ptr) +png_get_io_chunk_type (png_const_structrp png_ptr) { return png_ptr->chunk_name; } - -png_const_bytep PNGAPI -png_get_io_chunk_name (png_structp png_ptr) -{ - PNG_CSTRING_FROM_CHUNK(png_ptr->io_chunk_string, png_ptr->chunk_name); - return png_ptr->io_chunk_string; -} -#endif /* ?PNG_IO_STATE_SUPPORTED */ +#endif /* IO_STATE */ #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED # ifdef PNG_GET_PALETTE_MAX_SUPPORTED @@ -1167,4 +1216,4 @@ png_get_palette_max(png_const_structp png_ptr, png_const_infop info_ptr) # endif #endif -#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ +#endif /* READ || WRITE */ diff --git a/drivers/png/pnginfo.h b/drivers/png/pnginfo.h index c5b68c1e84..361ed8be70 100644 --- a/drivers/png/pnginfo.h +++ b/drivers/png/pnginfo.h @@ -1,8 +1,8 @@ /* pnginfo.h - header file for PNG reference library * - * Last changed in libpng 1.5.0 [January 6, 2011] - * Copyright (c) 1998-2002,2004,2006-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.1 [March 28, 2013] + * Copyright (c) 1998-2002,2004,2006-2013 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -54,7 +54,7 @@ struct png_info_def { - /* the following are necessary for every PNG file */ + /* The following are necessary for every PNG file */ png_uint_32 width; /* width of image in pixels (from IHDR) */ png_uint_32 height; /* height of image in pixels (from IHDR) */ png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */ @@ -69,11 +69,17 @@ struct png_info_def png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */ png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ - /* The following is informational only on read, and not used on writes. */ + /* The following are set by png_set_IHDR, called from the application on + * write, but the are never actually used by the write code. + */ png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */ png_byte pixel_depth; /* number of bits per pixel */ png_byte spare_byte; /* to align the data, and for future use */ + +#ifdef PNG_READ_SUPPORTED + /* This is never set during write */ png_byte signature[8]; /* magic bytes read by libpng from start of file */ +#endif /* The rest of the data is optional. If you are reading, check the * valid field to see if the information in these are valid. If you @@ -81,18 +87,25 @@ struct png_info_def * and initialize the appropriate fields below. */ -#if defined(PNG_gAMA_SUPPORTED) - /* The gAMA chunk describes the gamma characteristics of the system - * on which the image was created, normally in the range [1.0, 2.5]. - * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. +#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED) + /* png_colorspace only contains 'flags' if neither GAMMA or COLORSPACE are + * defined. When COLORSPACE is switched on all the colorspace-defining + * chunks should be enabled, when GAMMA is switched on all the gamma-defining + * chunks should be enabled. If this is not done it becomes possible to read + * inconsistent PNG files and assign a probably incorrect interpretation to + * the information. (In other words, by carefully choosing which chunks to + * recognize the system configuration can select an interpretation for PNG + * files containing ambiguous data and this will result in inconsistent + * behavior between different libpng builds!) */ - png_fixed_point gamma; + png_colorspace colorspace; #endif -#ifdef PNG_sRGB_SUPPORTED - /* GR-P, 0.96a */ - /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ - png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */ +#ifdef PNG_iCCP_SUPPORTED + /* iCCP chunk data. */ + png_charp iccp_name; /* profile name */ + png_bytep iccp_profile; /* International Color Consortium profile data */ + png_uint_32 iccp_proflen; /* ICC profile data length */ #endif #ifdef PNG_TEXT_SUPPORTED @@ -107,7 +120,7 @@ struct png_info_def int num_text; /* number of comments read or comments to write */ int max_text; /* current size of text array */ png_textp text; /* array of comments read or comments to write */ -#endif /* PNG_TEXT_SUPPORTED */ +#endif /* TEXT */ #ifdef PNG_tIME_SUPPORTED /* The tIME chunk holds the last time the displayed image data was @@ -182,23 +195,6 @@ defined(PNG_READ_BACKGROUND_SUPPORTED) png_uint_16p hist; #endif -#ifdef PNG_cHRM_SUPPORTED - /* The cHRM chunk describes the CIE color characteristics of the monitor - * on which the PNG was created. This data allows the viewer to do gamut - * mapping of the input image to ensure that the viewer sees the same - * colors in the image as the creator. Values are in the range - * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. - */ - png_fixed_point x_white; - png_fixed_point y_white; - png_fixed_point x_red; - png_fixed_point y_red; - png_fixed_point x_green; - png_fixed_point y_green; - png_fixed_point x_blue; - png_fixed_point y_blue; -#endif - #ifdef PNG_pCAL_SUPPORTED /* The pCAL chunk describes a transformation between the stored pixel * values and original physical data values used to create the image. @@ -223,25 +219,20 @@ defined(PNG_READ_BACKGROUND_SUPPORTED) /* New members added in libpng-1.0.6 */ png_uint_32 free_me; /* flags items libpng is responsible for freeing */ -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ - defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED /* Storage for unknown chunks that the library doesn't recognize. */ png_unknown_chunkp unknown_chunks; - int unknown_chunks_num; -#endif -#ifdef PNG_iCCP_SUPPORTED - /* iCCP chunk data. */ - png_charp iccp_name; /* profile name */ - png_bytep iccp_profile; /* International Color Consortium profile data */ - png_uint_32 iccp_proflen; /* ICC profile data length */ - png_byte iccp_compression; /* Always zero */ + /* The type of this field is limited by the type of + * png_struct::user_chunk_cache_max, else overflow can occur. + */ + int unknown_chunks_num; #endif #ifdef PNG_sPLT_SUPPORTED /* Data on sPLT chunks (there may be more than one). */ png_sPLT_tp splt_palettes; - int splt_palettes_num; + int splt_palettes_num; /* Match type returned by png_get API */ #endif #ifdef PNG_sCAL_SUPPORTED diff --git a/drivers/png/pnglibconf.h b/drivers/png/pnglibconf.h index 1df6146f29..3e70aa1170 100644 --- a/drivers/png/pnglibconf.h +++ b/drivers/png/pnglibconf.h @@ -1,9 +1,10 @@ -/* 1.5.27 STANDARD API DEFINITION */ +/* libpng 1.6.23 STANDARD API DEFINITION */ + /* pnglibconf.h - library build configuration */ -/* libpng version 1.5.27 - May 26, 2016 */ +/* Libpng version 1.6.23 - June 9, 2016 */ -/* Copyright (c) 2011-2015 Glenn Randers-Pehrson */ +/* Copyright (c) 1998-2015 Glenn Randers-Pehrson */ /* This code is released under the libpng license. */ /* For conditions of distribution and use, see the disclaimer */ @@ -20,9 +21,11 @@ /*#undef PNG_ARM_NEON_API_SUPPORTED*/ /*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/ #define PNG_BENIGN_ERRORS_SUPPORTED +#define PNG_BENIGN_READ_ERRORS_SUPPORTED +/*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/ #define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED #define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED -#define PNG_CHECK_cHRM_SUPPORTED +#define PNG_COLORSPACE_SUPPORTED #define PNG_CONSOLE_IO_SUPPORTED #define PNG_CONVERT_tIME_SUPPORTED #define PNG_EASY_ACCESS_SUPPORTED @@ -31,6 +34,9 @@ #define PNG_FIXED_POINT_SUPPORTED #define PNG_FLOATING_ARITHMETIC_SUPPORTED #define PNG_FLOATING_POINT_SUPPORTED +#define PNG_FORMAT_AFIRST_SUPPORTED +#define PNG_FORMAT_BGR_SUPPORTED +#define PNG_GAMMA_SUPPORTED #define PNG_GET_PALETTE_MAX_SUPPORTED #define PNG_HANDLE_AS_UNKNOWN_SUPPORTED #define PNG_INCH_CONVERSIONS_SUPPORTED @@ -91,13 +97,22 @@ #define PNG_READ_tIME_SUPPORTED #define PNG_READ_tRNS_SUPPORTED #define PNG_READ_zTXt_SUPPORTED -/*#undef PNG_SAFE_LIMITS_SUPPORTED*/ #define PNG_SAVE_INT_32_SUPPORTED +#define PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED #define PNG_SEQUENTIAL_READ_SUPPORTED #define PNG_SETJMP_SUPPORTED -/*#undef PNG_SET_OPTION_SUPPORTED*/ +#define PNG_SET_OPTION_SUPPORTED +#define PNG_SET_UNKNOWN_CHUNKS_SUPPORTED #define PNG_SET_USER_LIMITS_SUPPORTED +#define PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED +#define PNG_SIMPLIFIED_READ_BGR_SUPPORTED +#define PNG_SIMPLIFIED_READ_SUPPORTED +#define PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED +#define PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED +#define PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED +#define PNG_SIMPLIFIED_WRITE_SUPPORTED #define PNG_STDIO_SUPPORTED +#define PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED #define PNG_TEXT_SUPPORTED #define PNG_TIME_RFC1123_SUPPORTED #define PNG_UNKNOWN_CHUNKS_SUPPORTED @@ -173,15 +188,28 @@ #define PNG_API_RULE 0 #define PNG_DEFAULT_READ_MACROS 1 #define PNG_GAMMA_THRESHOLD_FIXED 5000 +#define PNG_IDAT_READ_SIZE PNG_ZBUF_SIZE +#define PNG_INFLATE_BUF_SIZE 1024 +#define PNG_LINKAGE_API extern +#define PNG_LINKAGE_CALLBACK extern +#define PNG_LINKAGE_DATA extern +#define PNG_LINKAGE_FUNCTION extern #define PNG_MAX_GAMMA_8 11 #define PNG_QUANTIZE_BLUE_BITS 5 #define PNG_QUANTIZE_GREEN_BITS 5 #define PNG_QUANTIZE_RED_BITS 5 +#define PNG_TEXT_Z_DEFAULT_COMPRESSION (-1) +#define PNG_TEXT_Z_DEFAULT_STRATEGY 0 #define PNG_USER_CHUNK_CACHE_MAX 1000 #define PNG_USER_CHUNK_MALLOC_MAX 8000000 #define PNG_USER_HEIGHT_MAX 1000000 #define PNG_USER_WIDTH_MAX 1000000 #define PNG_ZBUF_SIZE 8192 +#define PNG_ZLIB_VERNUM 0 /* unknown */ +#define PNG_Z_DEFAULT_COMPRESSION (-1) +#define PNG_Z_DEFAULT_NOFILTER_STRATEGY 0 +#define PNG_Z_DEFAULT_STRATEGY 1 #define PNG_sCAL_PRECISION 5 +#define PNG_sRGB_PROFILE_CHECKS 2 /* end of settings */ #endif /* PNGLCONF_H */ diff --git a/drivers/png/pngmem.c b/drivers/png/pngmem.c index ae74dcace0..7bcfd00507 100644 --- a/drivers/png/pngmem.c +++ b/drivers/png/pngmem.c @@ -1,8 +1,8 @@ /* pngmem.c - stub functions for memory allocation * - * Last changed in libpng 1.5.13 [September 27, 2012] - * Copyright (c) 1998-2002,2004,2006-2012 Glenn Randers-Pehrson + * Last changed in libpng 1.6.15 [November 20, 2014] + * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -20,627 +20,244 @@ #include "pngpriv.h" #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) - -/* Borland DOS special memory handler */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* If you change this, be sure to change the one in png.h also */ - -/* Allocate memory for a png_struct. The malloc and memset can be replaced - by a single call to calloc() if this is thought to improve performance. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) -{ -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); -} - -/* Alternate version of png_create_struct, for use with user-defined malloc. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (png_get_copyright(NULL)); - -# ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) - { - png_struct dummy_struct; - png_memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size); - } - - else -# endif /* PNG_USER_MEM_SUPPORTED */ - struct_ptr = (png_voidp)farmalloc(size); - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); -} - -/* Free memory allocated by a png_create_struct() call */ +/* Free a png_struct */ void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) +png_destroy_png_struct(png_structrp png_ptr) { -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) -{ -# endif - if (struct_ptr != NULL) + if (png_ptr != NULL) { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) - { - png_struct dummy_struct; - png_memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - (*(free_fn))(&dummy_struct, struct_ptr); - return; - } - -# endif /* PNG_USER_MEM_SUPPORTED */ - farfree (struct_ptr); + /* png_free might call png_error and may certainly call + * png_get_mem_ptr, so fake a temporary png_struct to support this. + */ + png_struct dummy_struct = *png_ptr; + memset(png_ptr, 0, (sizeof *png_ptr)); + png_free(&dummy_struct, png_ptr); + +# ifdef PNG_SETJMP_SUPPORTED + /* We may have a jmp_buf left to deallocate. */ + png_free_jmpbuf(&dummy_struct); +# endif } } /* Allocate memory. For reasonable files, size should never exceed * 64K. However, zlib may allocate more than 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does + * it not to. See zconf.h and png.h for more information. zlib does * need to allocate exactly 64K, so whatever you call here must * have the ability to do that. - * - * Borland seems to have a problem in DOS mode for exactly 64K. - * It gives you a segment with an offset of 8 (perhaps to store its - * memory stuff). zlib doesn't like this at all, so we have to - * detect and deal with it. This code should not be needed in - * Windows or OS/2 modes, and only in 16 bit mode. This code has - * been updated by Alexander Lehmann for version 0.89 to waste less - * memory. - * - * Note that we can't use png_size_t for the "size" declaration, - * since on some systems a png_size_t is a 16-bit quantity, and as a - * result, we would be truncating potentially larger memory requests - * (which should cause a fatal error) and introducing major problems. */ PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +png_calloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; - ret = (png_malloc(png_ptr, size)); + ret = png_malloc(png_ptr, size); if (ret != NULL) - png_memset(ret,0,(png_size_t)size); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - - else - ret = (png_malloc_default(png_ptr, size)); - - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of memory"); + memset(ret, 0, size); - return (ret); + return ret; } -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +/* png_malloc_base, an internal function added at libpng 1.6.0, does the work of + * allocating memory, taking into account limits and PNG_USER_MEM_SUPPORTED. + * Checking and error handling must happen outside this routine; it returns NULL + * if the allocation cannot be done (for any reason.) + */ +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED) { - png_voidp ret; -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - { - png_warning(png_ptr, "Cannot Allocate > 64K"); - ret = NULL; - } - - else -# endif - - if (size != (size_t)size) - ret = NULL; - - else if (size == (png_uint_32)65536L) + /* Moved to png_malloc_base from png_malloc_default in 1.6.0; the DOS + * allocators have also been removed in 1.6.0, so any 16-bit system now has + * to implement a user memory handler. This checks to be sure it isn't + * called with big numbers. + */ +#ifndef PNG_USER_MEM_SUPPORTED + PNG_UNUSED(png_ptr) +#endif + + /* Some compilers complain that this is always true. However, it + * can be false when integer overflow happens. + */ + if (size > 0 && size <= PNG_SIZE_MAX +# ifdef PNG_MAX_MALLOC_64K + && size <= 65536U +# endif + ) { - if (png_ptr->offset_table == NULL) - { - /* Try to see if we need to do any of this fancy stuff */ - ret = farmalloc(size); - if (ret == NULL || ((png_size_t)ret & 0xffff)) - { - int num_blocks; - png_uint_32 total_size; - png_bytep table; - int i, mem_level, window_bits; - png_byte huge * hptr; - int window_bits - - if (ret != NULL) - { - farfree(ret); - ret = NULL; - } - - window_bits = - png_ptr->zlib_window_bits >= png_ptr->zlib_text_window_bits ? - png_ptr->zlib_window_bits : png_ptr->zlib_text_window_bits; - - if (window_bits > 14) - num_blocks = (int)(1 << (window_bits - 14)); - - else - num_blocks = 1; - - mem_level = - png_ptr->zlib_mem_level >= png_ptr->zlib_text_mem_level ? - png_ptr->zlib_mem_level : png_ptr->zlib_text_mem_level; - - if (mem_level >= 7) - num_blocks += (int)(1 << (mem_level - 7)); - - else - num_blocks++; - - total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; - - table = farmalloc(total_size); - - if (table == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */ - - else - png_warning(png_ptr, "Out Of Memory"); -# endif - return (NULL); - } - - if ((png_size_t)table & 0xfff0) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, - "Farmalloc didn't return normalized pointer"); - - else - png_warning(png_ptr, - "Farmalloc didn't return normalized pointer"); -# endif - return (NULL); - } - - png_ptr->offset_table = table; - png_ptr->offset_table_ptr = farmalloc(num_blocks * - png_sizeof(png_bytep)); - - if (png_ptr->offset_table_ptr == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */ - - else - png_warning(png_ptr, "Out Of memory"); -# endif - return (NULL); - } - - hptr = (png_byte huge *)table; - if ((png_size_t)hptr & 0xf) - { - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ - } - - for (i = 0; i < num_blocks; i++) - { - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ - } - - png_ptr->offset_table_number = num_blocks; - png_ptr->offset_table_count = 0; - png_ptr->offset_table_count_free = 0; - } - } - - if (png_ptr->offset_table_count >= png_ptr->offset_table_number) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); /* Note "O" and "M" */ - - else - png_warning(png_ptr, "Out of Memory"); -# endif - return (NULL); - } - - ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; - } - - else - ret = farmalloc(size); - -# ifndef PNG_USER_MEM_SUPPORTED - if (ret == NULL) - { - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */ +#ifdef PNG_USER_MEM_SUPPORTED + if (png_ptr != NULL && png_ptr->malloc_fn != NULL) + return png_ptr->malloc_fn(png_constcast(png_structrp,png_ptr), size); else - png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */ - } -# endif - - return (ret); -} - -/* Free a pointer allocated by png_malloc(). In the default - * configuration, png_ptr is not used, but is passed in case it - * is needed. If ptr is NULL, return without taking any action. - */ -void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; +#endif + return malloc((size_t)size); /* checked for truncation above */ } else - png_free_default(png_ptr, ptr); + return NULL; } -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) +#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\ + defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) +/* This is really here only to work round a spurious warning in GCC 4.6 and 4.7 + * that arises because of the checks in png_realloc_array that are repeated in + * png_malloc_array. + */ +static png_voidp +png_malloc_array_checked(png_const_structrp png_ptr, int nelements, + size_t element_size) { -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || ptr == NULL) - return; + png_alloc_size_t req = nelements; /* known to be > 0 */ - if (png_ptr->offset_table != NULL) - { - int i; + if (req <= PNG_SIZE_MAX/element_size) + return png_malloc_base(png_ptr, req * element_size); - for (i = 0; i < png_ptr->offset_table_count; i++) - { - if (ptr == png_ptr->offset_table_ptr[i]) - { - ptr = NULL; - png_ptr->offset_table_count_free++; - break; - } - } - if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) - { - farfree(png_ptr->offset_table); - farfree(png_ptr->offset_table_ptr); - png_ptr->offset_table = NULL; - png_ptr->offset_table_ptr = NULL; - } - } - - if (ptr != NULL) - farfree(ptr); + /* The failure case when the request is too large */ + return NULL; } -#else /* Not the Borland DOS special memory handler */ - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) +png_malloc_array,(png_const_structrp png_ptr, int nelements, + size_t element_size),PNG_ALLOCATED) { -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); + if (nelements <= 0 || element_size == 0) + png_error(png_ptr, "internal error: array alloc"); + + return png_malloc_array_checked(png_ptr, nelements, element_size); } -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) +png_realloc_array,(png_const_structrp png_ptr, png_const_voidp old_array, + int old_elements, int add_elements, size_t element_size),PNG_ALLOCATED) { -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (NULL); - -# ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) + /* These are internal errors: */ + if (add_elements <= 0 || element_size == 0 || old_elements < 0 || + (old_array == NULL && old_elements > 0)) + png_error(png_ptr, "internal error: array realloc"); + + /* Check for overflow on the elements count (so the caller does not have to + * check.) + */ + if (add_elements <= INT_MAX - old_elements) { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(png_ptr, size); - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); - } -# endif /* PNG_USER_MEM_SUPPORTED */ - -# if defined(__TURBOC__) && !defined(__FLAT__) - struct_ptr = (png_voidp)farmalloc(size); -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - struct_ptr = (png_voidp)halloc(size, 1); -# else - struct_ptr = (png_voidp)malloc(size); -# endif -# endif - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); -} - + png_voidp new_array = png_malloc_array_checked(png_ptr, + old_elements+add_elements, element_size); -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - if (struct_ptr != NULL) - { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) + if (new_array != NULL) { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - (*(free_fn))(png_ptr, struct_ptr); - return; - } -# endif /* PNG_USER_MEM_SUPPORTED */ -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(struct_ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(struct_ptr); + /* Because png_malloc_array worked the size calculations below cannot + * overflow. + */ + if (old_elements > 0) + memcpy(new_array, old_array, element_size*(unsigned)old_elements); -# else - free(struct_ptr); + memset((char*)new_array + element_size*(unsigned)old_elements, 0, + element_size*(unsigned)add_elements); -# endif -# endif + return new_array; + } } + + return NULL; /* error */ } +#endif /* TEXT || sPLT || STORE_UNKNOWN_CHUNKS */ -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more than 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. +/* Various functions that have different error handling are derived from this. + * png_malloc always exists, but if PNG_USER_MEM_SUPPORTED is defined a separate + * function png_malloc_default is also provided. */ - PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +png_malloc,(png_const_structrp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) { png_voidp ret; - ret = (png_malloc(png_ptr, size)); + if (png_ptr == NULL) + return NULL; - if (ret != NULL) - png_memset(ret,0,(png_size_t)size); + ret = png_malloc_base(png_ptr, size); + + if (ret == NULL) + png_error(png_ptr, "Out of memory"); /* 'm' means png_malloc */ - return (ret); + return ret; } +#ifdef PNG_USER_MEM_SUPPORTED PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +png_malloc_default,(png_const_structrp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED PNG_DEPRECATED) { png_voidp ret; -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr == NULL || size == 0) - return (NULL); - - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); + if (png_ptr == NULL) + return NULL; - else - ret = (png_malloc_default(png_ptr, size)); + /* Passing 'NULL' here bypasses the application provided memory handler. */ + ret = png_malloc_base(NULL/*use malloc*/, size); - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); + if (ret == NULL) + png_error(png_ptr, "Out of Memory"); /* 'M' means png_malloc_default */ - return (ret); + return ret; } +#endif /* USER_MEM */ +/* This function was added at libpng version 1.2.3. The png_malloc_warn() + * function will issue a png_warning and return NULL instead of issuing a + * png_error, if it fails to allocate the requested memory. + */ PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +png_malloc_warn,(png_const_structrp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED) { - png_voidp ret; -# endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) + if (png_ptr != NULL) { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Cannot Allocate > 64K"); - - else -# endif - return NULL; - } -# endif - - /* Check for overflow */ -# if defined(__TURBOC__) && !defined(__FLAT__) - - if (size != (unsigned long)size) - ret = NULL; - - else - ret = farmalloc(size); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - if (size != (unsigned long)size) - ret = NULL; - - else - ret = halloc(size, 1); + png_voidp ret = png_malloc_base(png_ptr, size); -# else - if (size != (size_t)size) - ret = NULL; + if (ret != NULL) + return ret; - else - ret = malloc((size_t)size); -# endif -# endif - -# ifndef PNG_USER_MEM_SUPPORTED - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory"); -# endif + png_warning(png_ptr, "Out of memory"); + } - return (ret); + return NULL; } /* Free a pointer allocated by png_malloc(). If ptr is NULL, return * without taking any action. */ void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) +png_free(png_const_structrp png_ptr, png_voidp ptr) { if (png_ptr == NULL || ptr == NULL) return; -# ifdef PNG_USER_MEM_SUPPORTED +#ifdef PNG_USER_MEM_SUPPORTED if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } + png_ptr->free_fn(png_constcast(png_structrp,png_ptr), ptr); else png_free_default(png_ptr, ptr); } -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) +PNG_FUNCTION(void,PNGAPI +png_free_default,(png_const_structrp png_ptr, png_voidp ptr),PNG_DEPRECATED) { if (png_ptr == NULL || ptr == NULL) return; +#endif /* USER_MEM */ -# endif /* PNG_USER_MEM_SUPPORTED */ - -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(ptr); - -# else free(ptr); - -# endif -# endif -} -#endif /* Not Borland DOS special memory handler */ - -/* This function was added at libpng version 1.2.3. The png_malloc_warn() - * function will set up png_malloc() to issue a png_warning and return NULL - * instead of issuing a png_error, if it fails to allocate the requested - * memory. - */ -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ptr; - png_uint_32 save_flags; - if (png_ptr == NULL) - return (NULL); - - save_flags = png_ptr->flags; - png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; - ptr = (png_voidp)png_malloc((png_structp)png_ptr, size); - png_ptr->flags=save_flags; - return(ptr); } - #ifdef PNG_USER_MEM_SUPPORTED /* This function is called when the application wants to use another method * of allocating and freeing memory. */ void PNGAPI -png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr +png_set_mem_fn(png_structrp png_ptr, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn) { if (png_ptr != NULL) @@ -656,12 +273,12 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr * pointer before png_write_destroy and png_read_destroy are called. */ png_voidp PNGAPI -png_get_mem_ptr(png_const_structp png_ptr) +png_get_mem_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) - return (NULL); + return NULL; - return ((png_voidp)png_ptr->mem_ptr); + return png_ptr->mem_ptr; } -#endif /* PNG_USER_MEM_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ +#endif /* USER_MEM */ +#endif /* READ || WRITE */ diff --git a/drivers/png/pngpread.c b/drivers/png/pngpread.c index 9cf987d7e3..ca300e7f16 100644 --- a/drivers/png/pngpread.c +++ b/drivers/png/pngpread.c @@ -1,8 +1,8 @@ /* pngpread.c - read a png file in push mode * - * Last changed in libpng 1.5.23 [July 23, 2015] - * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.23 [June 9, 2016] + * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -25,8 +25,15 @@ #define PNG_READ_iTXt_MODE 7 #define PNG_ERROR_MODE 8 +#define PNG_PUSH_SAVE_BUFFER_IF_FULL \ +if (png_ptr->push_length + 4 > png_ptr->buffer_size) \ + { png_push_save_buffer(png_ptr); return; } +#define PNG_PUSH_SAVE_BUFFER_IF_LT(N) \ +if (png_ptr->buffer_size < N) \ + { png_push_save_buffer(png_ptr); return; } + void PNGAPI -png_process_data(png_structp png_ptr, png_infop info_ptr, +png_process_data(png_structrp png_ptr, png_inforp info_ptr, png_bytep buffer, png_size_t buffer_size) { if (png_ptr == NULL || info_ptr == NULL) @@ -41,11 +48,11 @@ png_process_data(png_structp png_ptr, png_infop info_ptr, } png_size_t PNGAPI -png_process_data_pause(png_structp png_ptr, int save) +png_process_data_pause(png_structrp png_ptr, int save) { if (png_ptr != NULL) { - /* It's easiest for the caller if we do the save, then the caller doesn't + /* It's easiest for the caller if we do the save; then the caller doesn't * have to supply the same data again: */ if (save != 0) @@ -68,16 +75,15 @@ png_process_data_pause(png_structp png_ptr, int save) } png_uint_32 PNGAPI -png_process_data_skip(png_structp png_ptr) +png_process_data_skip(png_structrp png_ptr) { - /* TODO: Deprecate and remove this API. - * Somewhere the implementation of this seems to have been lost, - * or abandoned. It was only to support some internal back-door access - * to png_struct) in libpng-1.4.x. - */ - png_warning(png_ptr, - "png_process_data_skip is not implemented in any current version" - " of libpng"); + /* TODO: Deprecate and remove this API. + * Somewhere the implementation of this seems to have been lost, + * or abandoned. It was only to support some internal back-door access + * to png_struct) in libpng-1.4.x. + */ + png_app_warning(png_ptr, +"png_process_data_skip is not implemented in any current version of libpng"); return 0; } @@ -85,7 +91,7 @@ png_process_data_skip(png_structp png_ptr) * doing before we ran out of data... */ void /* PRIVATE */ -png_process_some_data(png_structp png_ptr, png_infop info_ptr) +png_process_some_data(png_structrp png_ptr, png_inforp info_ptr) { if (png_ptr == NULL) return; @@ -125,7 +131,7 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr) * routine. */ void /* PRIVATE */ -png_push_read_sig(png_structp png_ptr, png_infop info_ptr) +png_push_read_sig(png_structrp png_ptr, png_inforp info_ptr) { png_size_t num_checked = png_ptr->sig_bytes, /* SAFE, does not exceed 8 */ num_to_check = 8 - num_checked; @@ -148,7 +154,6 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr) else png_error(png_ptr, "PNG file corrupted by ASCII conversion"); } - else { if (png_ptr->sig_bytes >= 8) @@ -159,27 +164,25 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr) } void /* PRIVATE */ -png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) +png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr) { png_uint_32 chunk_name; +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + int keep; /* unknown handling method */ +#endif - /* First we make sure we have enough data for the 4 byte chunk name - * and the 4 byte chunk length before proceeding with decoding the + /* First we make sure we have enough data for the 4-byte chunk name + * and the 4-byte chunk length before proceeding with decoding the * chunk data. To fully decode each of these chunks, we also make - * sure we have enough data in the buffer for the 4 byte CRC at the + * sure we have enough data in the buffer for the 4-byte CRC at the * end of every chunk (except IDAT, which is handled separately). */ - if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) + if ((png_ptr->mode & PNG_HAVE_CHUNK_HEADER) == 0) { png_byte chunk_length[4]; png_byte chunk_tag[4]; - if (png_ptr->buffer_size < 8) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_LT(8) png_push_fill_buffer(png_ptr, chunk_length, 4); png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); png_reset_crc(png_ptr); @@ -193,14 +196,31 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) if (chunk_name == png_IDAT) { - /* This is here above the if/else case statement below because if the - * unknown handling marks 'IDAT' as unknown then the IDAT handling case is - * completely skipped. - * - * TODO: there must be a better way of doing this. - */ - if (png_ptr->mode & PNG_AFTER_IDAT) + if ((png_ptr->mode & PNG_AFTER_IDAT) != 0) png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + + /* If we reach an IDAT chunk, this means we have read all of the + * header chunks, and we can start reading the image (or if this + * is called after the image has been read - we have an error). + */ + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_error(png_ptr, "Missing IHDR before IDAT"); + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + (png_ptr->mode & PNG_HAVE_PLTE) == 0) + png_error(png_ptr, "Missing PLTE before IDAT"); + + png_ptr->process_mode = PNG_READ_IDAT_MODE; + + if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) + if ((png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) == 0) + if (png_ptr->push_length == 0) + return; + + png_ptr->mode |= PNG_HAVE_IDAT; + + if ((png_ptr->mode & PNG_AFTER_IDAT) != 0) + png_benign_error(png_ptr, "Too many IDATs found"); } if (chunk_name == png_IHDR) @@ -208,23 +228,13 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) if (png_ptr->push_length != 13) png_error(png_ptr, "Invalid IHDR length"); - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length); } else if (chunk_name == png_IEND) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length); png_ptr->process_mode = PNG_READ_DONE_MODE; @@ -232,70 +242,25 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) } #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_chunk_unknown_handling(png_ptr, chunk_name)) + else if ((keep = png_chunk_unknown_handling(png_ptr, chunk_name)) != 0) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - if (chunk_name == png_IDAT) - png_ptr->mode |= PNG_HAVE_IDAT; - - png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length); + PNG_PUSH_SAVE_BUFFER_IF_FULL + png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length, keep); if (chunk_name == png_PLTE) png_ptr->mode |= PNG_HAVE_PLTE; - - else if (chunk_name == png_IDAT) - { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - } } #endif else if (chunk_name == png_PLTE) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length); } else if (chunk_name == png_IDAT) { - /* If we reach an IDAT chunk, this means we have read all of the - * header chunks, and we can start reading the image (or if this - * is called after the image has been read - we have an error). - */ - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - { - if (!(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) - if (png_ptr->push_length == 0) - return; - - if (png_ptr->mode & PNG_AFTER_IDAT) - png_benign_error(png_ptr, "Too many IDATs found"); - } - png_ptr->idat_size = png_ptr->push_length; - png_ptr->mode |= PNG_HAVE_IDAT; png_ptr->process_mode = PNG_READ_IDAT_MODE; png_push_have_info(png_ptr, info_ptr); png_ptr->zstream.avail_out = @@ -308,12 +273,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_gAMA_SUPPORTED else if (png_ptr->chunk_name == png_gAMA) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length); } @@ -321,12 +281,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_sBIT_SUPPORTED else if (png_ptr->chunk_name == png_sBIT) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length); } @@ -334,12 +289,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_cHRM_SUPPORTED else if (png_ptr->chunk_name == png_cHRM) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length); } @@ -347,12 +297,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_sRGB_SUPPORTED else if (chunk_name == png_sRGB) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length); } @@ -360,12 +305,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_iCCP_SUPPORTED else if (png_ptr->chunk_name == png_iCCP) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_iCCP(png_ptr, info_ptr, png_ptr->push_length); } @@ -373,12 +313,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_sPLT_SUPPORTED else if (chunk_name == png_sPLT) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_sPLT(png_ptr, info_ptr, png_ptr->push_length); } @@ -386,12 +321,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_tRNS_SUPPORTED else if (chunk_name == png_tRNS) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length); } @@ -399,12 +329,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_bKGD_SUPPORTED else if (chunk_name == png_bKGD) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length); } @@ -412,12 +337,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_hIST_SUPPORTED else if (chunk_name == png_hIST) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length); } @@ -425,12 +345,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_pHYs_SUPPORTED else if (chunk_name == png_pHYs) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length); } @@ -438,12 +353,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_oFFs_SUPPORTED else if (chunk_name == png_oFFs) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length); } #endif @@ -451,12 +361,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_pCAL_SUPPORTED else if (chunk_name == png_pCAL) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length); } @@ -464,12 +369,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_sCAL_SUPPORTED else if (chunk_name == png_sCAL) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_sCAL(png_ptr, info_ptr, png_ptr->push_length); } @@ -477,12 +377,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_tIME_SUPPORTED else if (chunk_name == png_tIME) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length); } @@ -490,12 +385,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_tEXt_SUPPORTED else if (chunk_name == png_tEXt) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length); } @@ -503,12 +393,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_zTXt_SUPPORTED else if (chunk_name == png_zTXt) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length); } @@ -516,25 +401,16 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_READ_iTXt_SUPPORTED else if (chunk_name == png_iTXt) { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_FULL png_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length); } - #endif else { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length); + PNG_PUSH_SAVE_BUFFER_IF_FULL + png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length, + PNG_HANDLE_CHUNK_AS_DEFAULT); } png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; @@ -549,8 +425,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) return; ptr = buffer; - - if (png_ptr->save_buffer_size) + if (png_ptr->save_buffer_size != 0) { png_size_t save_size; @@ -560,15 +435,14 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) else save_size = png_ptr->save_buffer_size; - png_memcpy(ptr, png_ptr->save_buffer_ptr, save_size); + memcpy(ptr, png_ptr->save_buffer_ptr, save_size); length -= save_size; ptr += save_size; png_ptr->buffer_size -= save_size; png_ptr->save_buffer_size -= save_size; png_ptr->save_buffer_ptr += save_size; } - - if (length && png_ptr->current_buffer_size) + if (length != 0 && png_ptr->current_buffer_size != 0) { png_size_t save_size; @@ -578,7 +452,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) else save_size = png_ptr->current_buffer_size; - png_memcpy(ptr, png_ptr->current_buffer_ptr, save_size); + memcpy(ptr, png_ptr->current_buffer_ptr, save_size); png_ptr->buffer_size -= save_size; png_ptr->current_buffer_size -= save_size; png_ptr->current_buffer_ptr += save_size; @@ -586,9 +460,9 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) } void /* PRIVATE */ -png_push_save_buffer(png_structp png_ptr) +png_push_save_buffer(png_structrp png_ptr) { - if (png_ptr->save_buffer_size) + if (png_ptr->save_buffer_size != 0) { if (png_ptr->save_buffer_ptr != png_ptr->save_buffer) { @@ -597,7 +471,6 @@ png_push_save_buffer(png_structp png_ptr) png_bytep dp; istop = png_ptr->save_buffer_size; - for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer; i < istop; i++, sp++, dp++) { @@ -605,7 +478,6 @@ png_push_save_buffer(png_structp png_ptr) } } } - if (png_ptr->save_buffer_size + png_ptr->current_buffer_size > png_ptr->save_buffer_max) { @@ -620,7 +492,8 @@ png_push_save_buffer(png_structp png_ptr) new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256; old_buffer = png_ptr->save_buffer; - png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, new_max); + png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, + (png_size_t)new_max); if (png_ptr->save_buffer == NULL) { @@ -628,25 +501,26 @@ png_push_save_buffer(png_structp png_ptr) png_error(png_ptr, "Insufficient memory for save_buffer"); } - png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); + if (old_buffer) + memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); + else if (png_ptr->save_buffer_size) + png_error(png_ptr, "save_buffer error"); png_free(png_ptr, old_buffer); png_ptr->save_buffer_max = new_max; } - if (png_ptr->current_buffer_size) { - png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size, + memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size, png_ptr->current_buffer_ptr, png_ptr->current_buffer_size); png_ptr->save_buffer_size += png_ptr->current_buffer_size; png_ptr->current_buffer_size = 0; } - png_ptr->save_buffer_ptr = png_ptr->save_buffer; png_ptr->buffer_size = 0; } void /* PRIVATE */ -png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, +png_push_restore_buffer(png_structrp png_ptr, png_bytep buffer, png_size_t buffer_length) { png_ptr->current_buffer = buffer; @@ -656,20 +530,15 @@ png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, } void /* PRIVATE */ -png_push_read_IDAT(png_structp png_ptr) +png_push_read_IDAT(png_structrp png_ptr) { - if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) + if ((png_ptr->mode & PNG_HAVE_CHUNK_HEADER) == 0) { png_byte chunk_length[4]; png_byte chunk_tag[4]; /* TODO: this code can be commoned up with the same code in push_read */ - if (png_ptr->buffer_size < 8) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_LT(8) png_push_fill_buffer(png_ptr, chunk_length, 4); png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); png_reset_crc(png_ptr); @@ -681,7 +550,7 @@ png_push_read_IDAT(png_structp png_ptr) { png_ptr->process_mode = PNG_READ_CHUNK_MODE; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0) png_error(png_ptr, "Not enough compressed data"); return; @@ -690,7 +559,7 @@ png_push_read_IDAT(png_structp png_ptr) png_ptr->idat_size = png_ptr->push_length; } - if (png_ptr->idat_size && png_ptr->save_buffer_size) + if (png_ptr->idat_size != 0 && png_ptr->save_buffer_size != 0) { png_size_t save_size = png_ptr->save_buffer_size; png_uint_32 idat_size = png_ptr->idat_size; @@ -699,7 +568,7 @@ png_push_read_IDAT(png_structp png_ptr) * are of different types and we don't know which variable has the fewest * bits. Carefully select the smaller and cast it to the type of the * larger - this cannot overflow. Do not cast in the following test - it - * will break on either 16 or 64 bit platforms. + * will break on either 16-bit or 64-bit platforms. */ if (idat_size < save_size) save_size = (png_size_t)idat_size; @@ -717,7 +586,7 @@ png_push_read_IDAT(png_structp png_ptr) png_ptr->save_buffer_ptr += save_size; } - if (png_ptr->idat_size && png_ptr->current_buffer_size) + if (png_ptr->idat_size != 0 && png_ptr->current_buffer_size != 0) { png_size_t save_size = png_ptr->current_buffer_size; png_uint_32 idat_size = png_ptr->idat_size; @@ -743,22 +612,18 @@ png_push_read_IDAT(png_structp png_ptr) png_ptr->current_buffer_ptr += save_size; } - if (!png_ptr->idat_size) + if (png_ptr->idat_size == 0) { - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - + PNG_PUSH_SAVE_BUFFER_IF_LT(4) png_crc_finish(png_ptr, 0); png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->zowner = 0; } } void /* PRIVATE */ -png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, +png_process_IDAT_data(png_structrp png_ptr, png_bytep buffer, png_size_t buffer_length) { /* The caller checks for a non-zero buffer length. */ @@ -770,13 +635,14 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, * handle the uncompressed results. */ png_ptr->zstream.next_in = buffer; + /* TODO: WARNING: TRUNCATION ERROR: DANGER WILL ROBINSON: */ png_ptr->zstream.avail_in = (uInt)buffer_length; /* Keep going until the decompressed data is all processed * or the stream marked as finished. */ while (png_ptr->zstream.avail_in > 0 && - !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + (png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0) { int ret; @@ -787,9 +653,9 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, */ if (!(png_ptr->zstream.avail_out > 0)) { - png_ptr->zstream.avail_out = - (uInt) PNG_ROWBYTES(png_ptr->pixel_depth, - png_ptr->iwidth) + 1; + /* TODO: WARNING: TRUNCATION ERROR: DANGER WILL ROBINSON: */ + png_ptr->zstream.avail_out = (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth, + png_ptr->iwidth) + 1); png_ptr->zstream.next_out = png_ptr->row_buf; } @@ -801,19 +667,14 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, * change the current behavior (see comments in inflate.c * for why this doesn't happen at present with zlib 1.2.5). */ - ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH); - - /* Hack, added in 1.5.18: the progressive reader does not reset - * png_ptr->zstream, so any attempt to use it after the last IDAT fails - * (silently). This allows the read code to do the reset when required. - */ - png_ptr->flags |= PNG_FLAG_ZSTREAM_PROGRESSIVE; + ret = PNG_INFLATE(png_ptr, Z_SYNC_FLUSH); /* Check for any failure before proceeding. */ if (ret != Z_OK && ret != Z_STREAM_END) { /* Terminate the decompression. */ - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + png_ptr->zowner = 0; /* This may be a truncated stream (missing or * damaged end code). Treat that as a warning. @@ -841,7 +702,8 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, { /* Extra data. */ png_warning(png_ptr, "Extra compressed data in IDAT"); - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + png_ptr->zowner = 0; /* Do no more processing; skip the unprocessed * input check below. @@ -856,7 +718,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, /* And check for the end of the stream. */ if (ret == Z_STREAM_END) - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; } /* All the data should have been processed, if anything @@ -868,7 +730,7 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, } void /* PRIVATE */ -png_push_process_row(png_structp png_ptr) +png_push_process_row(png_structrp png_ptr) { /* 1.5.6: row_info moved out of png_struct to a local here. */ png_row_info row_info; @@ -894,10 +756,10 @@ png_push_process_row(png_structp png_ptr) * it may not be in the future, so this was changed just to copy the * interlaced row count: */ - png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); + memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); #ifdef PNG_READ_TRANSFORMS_SUPPORTED - if (png_ptr->transformations) + if (png_ptr->transformations != 0) png_do_read_transformations(png_ptr, &row_info); #endif @@ -914,15 +776,16 @@ png_push_process_row(png_structp png_ptr) #ifdef PNG_READ_INTERLACING_SUPPORTED - /* Blow up interlaced rows to full size */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) + /* Expand interlaced rows to full size */ + if (png_ptr->interlaced != 0 && + (png_ptr->transformations & PNG_INTERLACE) != 0) { if (png_ptr->pass < 6) png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations); - switch (png_ptr->pass) - { + switch (png_ptr->pass) + { case 0: { int i; @@ -1097,26 +960,26 @@ png_push_process_row(png_structp png_ptr) } void /* PRIVATE */ -png_read_push_finish_row(png_structp png_ptr) +png_read_push_finish_row(png_structrp png_ptr) { #ifdef PNG_READ_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ - static PNG_CONST png_byte FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; + static PNG_CONST png_byte png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; /* Offset to next interlace block */ - static PNG_CONST png_byte FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; /* Start of interlace block in the y direction */ - static PNG_CONST png_byte FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; + static PNG_CONST png_byte png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; /* Offset to next interlace block in the y direction */ - static PNG_CONST png_byte FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; + static PNG_CONST png_byte png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; /* Height of interlace block. This is not currently used - if you need * it, uncomment it here and in png.h - static PNG_CONST png_byte FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; + static PNG_CONST png_byte png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; */ #endif @@ -1125,10 +988,10 @@ png_read_push_finish_row(png_structp png_ptr) return; #ifdef PNG_READ_INTERLACING_SUPPORTED - if (png_ptr->interlaced) + if (png_ptr->interlaced != 0) { png_ptr->row_number = 0; - png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); do { @@ -1149,7 +1012,7 @@ png_read_push_finish_row(png_structp png_ptr) png_pass_start[png_ptr->pass]) / png_pass_inc[png_ptr->pass]; - if (png_ptr->transformations & PNG_INTERLACE) + if ((png_ptr->transformations & PNG_INTERLACE) != 0) break; png_ptr->num_rows = (png_ptr->height + @@ -1159,25 +1022,25 @@ png_read_push_finish_row(png_structp png_ptr) } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0); } -#endif /* PNG_READ_INTERLACING_SUPPORTED */ +#endif /* READ_INTERLACING */ } void /* PRIVATE */ -png_push_have_info(png_structp png_ptr, png_infop info_ptr) +png_push_have_info(png_structrp png_ptr, png_inforp info_ptr) { if (png_ptr->info_fn != NULL) (*(png_ptr->info_fn))(png_ptr, info_ptr); } void /* PRIVATE */ -png_push_have_end(png_structp png_ptr, png_infop info_ptr) +png_push_have_end(png_structrp png_ptr, png_inforp info_ptr) { if (png_ptr->end_fn != NULL) (*(png_ptr->end_fn))(png_ptr, info_ptr); } void /* PRIVATE */ -png_push_have_row(png_structp png_ptr, png_bytep row) +png_push_have_row(png_structrp png_ptr, png_bytep row) { if (png_ptr->row_fn != NULL) (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number, @@ -1186,7 +1049,7 @@ png_push_have_row(png_structp png_ptr, png_bytep row) #ifdef PNG_READ_INTERLACING_SUPPORTED void PNGAPI -png_progressive_combine_row (png_structp png_ptr, png_bytep old_row, +png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row, png_const_bytep new_row) { if (png_ptr == NULL) @@ -1199,10 +1062,10 @@ png_progressive_combine_row (png_structp png_ptr, png_bytep old_row, if (new_row != NULL) png_combine_row(png_ptr, old_row, 1/*blocky display*/); } -#endif /* PNG_READ_INTERLACING_SUPPORTED */ +#endif /* READ_INTERLACING */ void PNGAPI -png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, +png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr, png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn) { @@ -1217,11 +1080,11 @@ png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, } png_voidp PNGAPI -png_get_progressive_ptr(png_const_structp png_ptr) +png_get_progressive_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return (NULL); return png_ptr->io_ptr; } -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ +#endif /* PROGRESSIVE_READ */ diff --git a/drivers/png/pngpriv.h b/drivers/png/pngpriv.h index 8bdccccafb..9338df3144 100644 --- a/drivers/png/pngpriv.h +++ b/drivers/png/pngpriv.h @@ -1,8 +1,8 @@ /* pngpriv.h - private declarations for use inside libpng * - * Last changed in libpng 1.5.26 [December 17, 2015] - * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.22 [May 26, 2016] + * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -12,7 +12,7 @@ */ /* The symbols declared in this file (including the functions declared - * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public + * as extern) are PRIVATE. They are not part of the libpng public * interface, and are not recommended for use by regular applications. * Some of them may become public in the future; others may stay private, * change in an incompatible way, or even disappear. @@ -38,16 +38,42 @@ #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ #ifndef PNG_VERSION_INFO_ONLY -/* This is required for the definition of abort(), used as a last ditch - * error handler when all else fails. +/* Standard library headers not required by png.h: */ +# include <stdlib.h> +# include <string.h> +#endif + +#define PNGLIB_BUILD /*libpng is being built, not used*/ + +/* If HAVE_CONFIG_H is defined during the build then the build system must + * provide an appropriate "config.h" file on the include path. The header file + * must provide definitions as required below (search for "HAVE_CONFIG_H"); + * see configure.ac for more details of the requirements. The macro + * "PNG_NO_CONFIG_H" is provided for maintainers to test for dependencies on + * 'configure'; define this macro to prevent the configure build including the + * configure generated config.h. Libpng is expected to compile without *any* + * special build system support on a reasonably ANSI-C compliant system. */ -#include <stdlib.h> +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include <config.h> -/* This is used to find 'offsetof', used below for alignment tests. */ -#include <stddef.h> -#endif /* !PNG_VERSION_INFO_ONLY */ + /* Pick up the definition of 'restrict' from config.h if it was read: */ +# define PNG_RESTRICT restrict +#endif -#define PNGLIB_BUILD /*libpng is being built, not used*/ +/* To support symbol prefixing it is necessary to know *before* including png.h + * whether the fixed point (and maybe other) APIs are exported, because if they + * are not internal definitions may be required. This is handled below just + * before png.h is included, but load the configuration now if it is available. + */ +#ifndef PNGLCONF_H +# include "pnglibconf.h" +#endif + +/* Local renames may change non-exported API functions from png.h */ +#if defined(PNG_PREFIX) && !defined(PNGPREFIX_H) +# include "pngprefix.h" +#endif #ifdef PNG_USER_CONFIG # include "pngusr.h" @@ -60,6 +86,102 @@ # endif #endif +/* Compile time options. + * ===================== + * In a multi-arch build the compiler may compile the code several times for the + * same object module, producing different binaries for different architectures. + * When this happens configure-time setting of the target host options cannot be + * done and this interferes with the handling of the ARM NEON optimizations, and + * possibly other similar optimizations. Put additional tests here; in general + * this is needed when the same option can be changed at both compile time and + * run time depending on the target OS (i.e. iOS vs Android.) + * + * NOTE: symbol prefixing does not pass $(CFLAGS) to the preprocessor, because + * this is not possible with certain compilers (Oracle SUN OS CC), as a result + * it is necessary to ensure that all extern functions that *might* be used + * regardless of $(CFLAGS) get declared in this file. The test on __ARM_NEON__ + * below is one example of this behavior because it is controlled by the + * presence or not of -mfpu=neon on the GCC command line, it is possible to do + * this in $(CC), e.g. "CC=gcc -mfpu=neon", but people who build libpng rarely + * do this. + */ +#ifndef PNG_ARM_NEON_OPT + /* ARM NEON optimizations are being controlled by the compiler settings, + * typically the target FPU. If the FPU has been set to NEON (-mfpu=neon + * with GCC) then the compiler will define __ARM_NEON__ and we can rely + * unconditionally on NEON instructions not crashing, otherwise we must + * disable use of NEON instructions. + * + * NOTE: at present these optimizations depend on 'ALIGNED_MEMORY', so they + * can only be turned on automatically if that is supported too. If + * PNG_ARM_NEON_OPT is set in CPPFLAGS (to >0) then arm/arm_init.c will fail + * to compile with an appropriate #error if ALIGNED_MEMORY has been turned + * off. + * + * Note that gcc-4.9 defines __ARM_NEON instead of the deprecated + * __ARM_NEON__, so we check both variants. + * + * To disable ARM_NEON optimizations entirely, and skip compiling the + * associated assembler code, pass --enable-arm-neon=no to configure + * or put -DPNG_ARM_NEON_OPT=0 in CPPFLAGS. + */ +# if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \ + defined(PNG_ALIGNED_MEMORY_SUPPORTED) +# define PNG_ARM_NEON_OPT 2 +# else +# define PNG_ARM_NEON_OPT 0 +# endif +#endif + +#if PNG_ARM_NEON_OPT > 0 + /* NEON optimizations are to be at least considered by libpng, so enable the + * callbacks to do this. + */ +# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon + + /* By default the 'intrinsics' code in arm/filter_neon_intrinsics.c is used + * if possible - if __ARM_NEON__ is set and the compiler version is not known + * to be broken. This is controlled by PNG_ARM_NEON_IMPLEMENTATION which can + * be: + * + * 1 The intrinsics code (the default with __ARM_NEON__) + * 2 The hand coded assembler (the default without __ARM_NEON__) + * + * It is possible to set PNG_ARM_NEON_IMPLEMENTATION in CPPFLAGS, however + * this is *NOT* supported and may cease to work even after a minor revision + * to libpng. It *is* valid to do this for testing purposes, e.g. speed + * testing or a new compiler, but the results should be communicated to the + * libpng implementation list for incorporation in the next minor release. + */ +# ifndef PNG_ARM_NEON_IMPLEMENTATION +# if defined(__ARM_NEON__) || defined(__ARM_NEON) +# if defined(__clang__) + /* At present it is unknown by the libpng developers which versions + * of clang support the intrinsics, however some or perhaps all + * versions do not work with the assembler so this may be + * irrelevant, so just use the default (do nothing here.) + */ +# elif defined(__GNUC__) + /* GCC 4.5.4 NEON support is known to be broken. 4.6.3 is known to + * work, so if this *is* GCC, or G++, look for a version >4.5 + */ +# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6) +# define PNG_ARM_NEON_IMPLEMENTATION 2 +# endif /* no GNUC support */ +# endif /* __GNUC__ */ +# else /* !defined __ARM_NEON__ */ + /* The 'intrinsics' code simply won't compile without this -mfpu=neon: + */ +# define PNG_ARM_NEON_IMPLEMENTATION 2 +# endif /* __ARM_NEON__ */ +# endif /* !PNG_ARM_NEON_IMPLEMENTATION */ + +# ifndef PNG_ARM_NEON_IMPLEMENTATION + /* Use the intrinsics code by default. */ +# define PNG_ARM_NEON_IMPLEMENTATION 1 +# endif +#endif /* PNG_ARM_NEON_OPT > 0 */ + /* Is this a build of a DLL where compilation of the object modules requires * different preprocessor settings to those required for a simple library? If * so PNG_BUILD_DLL must be set. @@ -124,78 +246,75 @@ # define PNG_PRIVATE #endif -#include "png.h" +/* Symbol preprocessing support. + * + * To enable listing global, but internal, symbols the following macros should + * always be used to declare an extern data or function object in this file. + */ +#ifndef PNG_INTERNAL_DATA +# define PNG_INTERNAL_DATA(type, name, array) PNG_LINKAGE_DATA type name array +#endif -/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ -#ifndef PNG_DLL_EXPORT -# define PNG_DLL_EXPORT +#ifndef PNG_INTERNAL_FUNCTION +# define PNG_INTERNAL_FUNCTION(type, name, args, attributes)\ + PNG_LINKAGE_FUNCTION PNG_FUNCTION(type, name, args, PNG_EMPTY attributes) #endif -/* Compile time options. - * ===================== - * In a multi-arch build the compiler may compile the code several times for the - * same object module, producing different binaries for different architectures. - * When this happens configure-time setting of the target host options cannot be - * done and this interferes with the handling of the ARM NEON optimizations, and - * possibly other similar optimizations. Put additional tests here; in general - * this is needed when the same option can be changed at both compile time and - * run time depending on the target OS (i.e. iOS vs Android.) +#ifndef PNG_INTERNAL_CALLBACK +# define PNG_INTERNAL_CALLBACK(type, name, args, attributes)\ + PNG_LINKAGE_CALLBACK PNG_FUNCTION(type, (PNGCBAPI name), args,\ + PNG_EMPTY attributes) +#endif + +/* If floating or fixed point APIs are disabled they may still be compiled + * internally. To handle this make sure they are declared as the appropriate + * internal extern function (otherwise the symbol prefixing stuff won't work and + * the functions will be used without definitions.) * - * NOTE: symbol prefixing does not pass $(CFLAGS) to the preprocessor, because - * this is not possible with certain compilers (Oracle SUN OS CC), as a result - * it is necessary to ensure that all extern functions that *might* be used - * regardless of $(CFLAGS) get declared in this file. The test on __ARM_NEON__ - * below is one example of this behavior because it is controlled by the - * presence or not of -mfpu=neon on the GCC command line, it is possible to do - * this in $(CC), e.g. "CC=gcc -mfpu=neon", but people who build libpng rarely - * do this. - */ -#ifndef PNG_ARM_NEON_OPT - /* ARM NEON optimizations are being controlled by the compiler settings, - * typically the target FPU. If the FPU has been set to NEON (-mfpu=neon - * with GCC) then the compiler will define __ARM_NEON__ and we can rely - * unconditionally on NEON instructions not crashing, otherwise we must - * disable use of NEON instructions. - * - * NOTE: at present these optimizations depend on 'ALIGNED_MEMORY', so they - * can only be turned on automatically if that is supported too. If - * PNG_ARM_NEON_OPT is set in CPPFLAGS (to >0) then arm/arm_init.c will fail - * to compile with an appropriate #error if ALIGNED_MEMORY has been turned - * off. - */ -# if defined(__ARM_NEON__) && defined(PNG_ALIGNED_MEMORY_SUPPORTED) -# define PNG_ARM_NEON_OPT 2 -# else -# define PNG_ARM_NEON_OPT 0 + * NOTE: although all the API functions are declared here they are not all + * actually built! Because the declarations are still made it is necessary to + * fake out types that they depend on. + */ +#ifndef PNG_FP_EXPORT +# ifndef PNG_FLOATING_POINT_SUPPORTED +# define PNG_FP_EXPORT(ordinal, type, name, args)\ + PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY); +# ifndef PNG_VERSION_INFO_ONLY + typedef struct png_incomplete png_double; + typedef png_double* png_doublep; + typedef const png_double* png_const_doublep; + typedef png_double** png_doublepp; +# endif +# endif +#endif +#ifndef PNG_FIXED_EXPORT +# ifndef PNG_FIXED_POINT_SUPPORTED +# define PNG_FIXED_EXPORT(ordinal, type, name, args)\ + PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY); # endif #endif +#include "png.h" -#if PNG_ARM_NEON_OPT > 0 - /* NEON optimizations are to be at least considered by libpng, so enable the - * callbacks to do this. - */ -# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon +/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ +#ifndef PNG_DLL_EXPORT +# define PNG_DLL_EXPORT #endif -/* SECURITY and SAFETY: +/* This is a global switch to set the compilation for an installed system + * (a release build). It can be set for testing debug builds to ensure that + * they will compile when the build type is switched to RC or STABLE, the + * default is just to use PNG_LIBPNG_BUILD_BASE_TYPE. Set this in CPPFLAGS + * with either: * - * By default libpng is built without any internal limits on image size, - * individual heap (png_malloc) allocations or the total amount of memory used. - * If PNG_SAFE_LIMITS_SUPPORTED is defined, however, the limits below are used - * (unless individually overridden). These limits are believed to be fairly - * safe, but builders of secure systems should verify the values against the - * real system capabilities. - */ - -/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" - * script. We may need it here to get the correct configuration on things - * like limits. + * -DPNG_RELEASE_BUILD Turns on the release compile path + * -DPNG_RELEASE_BUILD=0 Turns it off + * or in your pngusr.h with + * #define PNG_RELEASE_BUILD=1 Turns on the release compile path + * #define PNG_RELEASE_BUILD=0 Turns it off */ -#ifdef PNG_CONFIGURE_LIBPNG -# ifdef HAVE_CONFIG_H -# include "config.h" -# endif +#ifndef PNG_RELEASE_BUILD +# define PNG_RELEASE_BUILD (PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC) #endif /* SECURITY and SAFETY: @@ -220,11 +339,6 @@ # define PNG_MAX_MALLOC_64K #endif -/* Moved to pngpriv.h at libpng-1.5.0 */ -/* NOTE: some of these may have been used in external applications as - * these definitions were exposed in pngconf.h prior to 1.5. - */ - #ifndef PNG_UNUSED /* Unused formal parameter warnings are silenced using the following macro * which is expected to have no bad effects on performance (optimizing @@ -243,30 +357,6 @@ # define PNG_ZBUF_SIZE 65536L #endif -/* PNG_STATIC is used to mark internal file scope functions if they need to be - * accessed for implementation tests (see the code in tests/?*). - */ -#ifndef PNG_STATIC -# define PNG_STATIC static -#endif - -/* C99 restrict is used where possible, to do this 'restrict' is defined as - * empty if we can't be sure it is supported. configure builds have already - * done this work. - */ -#ifdef PNG_CONFIGURE_LIBPNG -# define PNG_RESTRICT restrict -#else - /* Modern compilers support restrict, but assume not for anything not - * recognized here: - */ -# if defined(__GNUC__) || defined(_MSC_VER) || defined(__WATCOMC__) -# define PNG_RESTRICT restrict -# else -# define PNG_RESTRICT -# endif -#endif - /* If warnings or errors are turned off the code is disabled or redirected here. * From 1.5.4 functions have been added to allow very limited formatting of * error and warning messages - this code will also be disabled here. @@ -291,23 +381,18 @@ */ #ifdef __cplusplus # define png_voidcast(type, value) static_cast<type>(value) +# define png_constcast(type, value) const_cast<type>(value) +# define png_aligncast(type, value) \ + static_cast<type>(static_cast<void*>(value)) +# define png_aligncastconst(type, value) \ + static_cast<type>(static_cast<const void*>(value)) #else # define png_voidcast(type, value) (value) +# define png_constcast(type, value) ((type)(value)) +# define png_aligncast(type, value) ((void*)(value)) +# define png_aligncastconst(type, value) ((const void*)(value)) #endif /* __cplusplus */ -#ifndef PNG_EXTERN -/* The functions exported by PNG_EXTERN are internal functions, which - * aren't usually used outside the library (as far as I know), so it is - * debatable if they should be exported at all. In the future, when it - * is possible to have run-time registry of chunk-handling functions, - * some of these might be made available again. - * - * 1.5.7: turned the use of 'extern' back on, since it is localized to pngpriv.h - * it should be safe now (it is unclear why it was turned off.) - */ -# define PNG_EXTERN extern -#endif - /* Some fixed point APIs are still required even if not exported because * they get used by the corresponding floating point APIs. This magic * deals with this: @@ -363,7 +448,7 @@ defined(_WIN32) || defined(__WIN32__) # include <windows.h> /* defines _WINDOWS_ macro */ #endif -#endif /* !PNG_VERSION_INFO_ONLY */ +#endif /* PNG_VERSION_INFO_ONLY */ /* Moved here around 1.5.0beta36 from pngconf.h */ /* Users may want to use these so they are not private. Any library @@ -379,34 +464,6 @@ # endif #endif -#ifdef USE_FAR_KEYWORD -/* Use this to make far-to-near assignments */ -# define CHECK 1 -# define NOCHECK 0 -# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) -# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) -# define png_strlen _fstrlen -# define png_memcmp _fmemcmp /* SJT: added */ -# define png_memcpy _fmemcpy -# define png_memset _fmemset -#else -# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */ -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strlen lstrlenA -# define png_memcmp memcmp -# define png_memcpy memcpy -# define png_memset memset -# else -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strlen strlen -# define png_memcmp memcmp /* SJT: added */ -# define png_memcpy memcpy -# define png_memset memset -# endif -#endif - /* These macros may need to be architecture dependent. */ #define PNG_ALIGN_NONE 0 /* do not use data alignment */ #define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ @@ -469,16 +526,17 @@ #define PNG_HAVE_IDAT 0x04 /* #define PNG_AFTER_IDAT 0x08 (defined in png.h) */ #define PNG_HAVE_IEND 0x10 -#define PNG_HAVE_gAMA 0x20 -#define PNG_HAVE_cHRM 0x40 -#define PNG_HAVE_sRGB 0x80 + /* 0x20 (unused) */ + /* 0x40 (unused) */ + /* 0x80 (unused) */ #define PNG_HAVE_CHUNK_HEADER 0x100 #define PNG_WROTE_tIME 0x200 #define PNG_WROTE_INFO_BEFORE_PLTE 0x400 #define PNG_BACKGROUND_IS_GRAY 0x800 #define PNG_HAVE_PNG_SIGNATURE 0x1000 #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ -#define PNG_HAVE_iCCP 0x4000 + /* 0x4000 (unused) */ +#define PNG_IS_READ_STRUCT 0x8000 /* Else is a write struct */ /* Flags for the transformations the PNG library does on the image data */ #define PNG_BGR 0x0001 @@ -506,49 +564,49 @@ #define PNG_RGB_TO_GRAY_WARN 0x400000 #define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */ #define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */ -#define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */ -#define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */ -#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */ - /* 0x8000000 unused */ - /* 0x10000000 unused */ - /* 0x20000000 unused */ - /* 0x40000000 unused */ +#define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */ +#define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */ +#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */ + /* 0x8000000 unused */ + /* 0x10000000 unused */ + /* 0x20000000 unused */ + /* 0x40000000 unused */ /* Flags for png_create_struct */ #define PNG_STRUCT_PNG 0x0001 #define PNG_STRUCT_INFO 0x0002 /* Flags for the png_ptr->flags rather than declaring a byte for each one */ #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 -#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 -#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 -#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 -#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 -#define PNG_FLAG_ZLIB_FINISHED 0x0020 +#define PNG_FLAG_ZSTREAM_INITIALIZED 0x0002 /* Added to libpng-1.6.0 */ + /* 0x0004 unused */ +#define PNG_FLAG_ZSTREAM_ENDED 0x0008 /* Added to libpng-1.6.0 */ + /* 0x0010 unused */ + /* 0x0020 unused */ #define PNG_FLAG_ROW_INIT 0x0040 #define PNG_FLAG_FILLER_AFTER 0x0080 #define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 #define PNG_FLAG_CRC_CRITICAL_USE 0x0400 #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 -#define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */ -#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */ -#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */ -#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000 -#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000 -#define PNG_FLAG_LIBRARY_MISMATCH 0x20000 -#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 -#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 -#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000 -#define PNG_FLAG_ZSTREAM_PROGRESSIVE 0x200000 - /* 0x400000 unused */ -#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */ -#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */ -#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000 /* to libpng-1.5.4 */ -#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000 -#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000 -#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000 - /* 0x20000000 unused */ - /* 0x40000000 unused */ +#define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */ +/* #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000 */ +/* #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000 */ +#define PNG_FLAG_LIBRARY_MISMATCH 0x20000 +#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 +#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 +#define PNG_FLAG_BENIGN_ERRORS_WARN 0x100000 /* Added to libpng-1.4.0 */ +#define PNG_FLAG_APP_WARNINGS_WARN 0x200000 /* Added to libpng-1.6.0 */ +#define PNG_FLAG_APP_ERRORS_WARN 0x400000 /* Added to libpng-1.6.0 */ + /* 0x800000 unused */ + /* 0x1000000 unused */ + /* 0x2000000 unused */ + /* 0x4000000 unused */ + /* 0x8000000 unused */ + /* 0x10000000 unused */ + /* 0x20000000 unused */ + /* 0x40000000 unused */ #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ PNG_FLAG_CRC_ANCILLARY_NOWARN) @@ -559,24 +617,23 @@ #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ PNG_FLAG_CRC_CRITICAL_MASK) -/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib - * can handle at once. This type need be no larger than 16 bits (so maximum of - * 65535), this define allows us to discover how big it is, but limited by the - * maximuum for png_size_t. The value can be overriden in a library build - * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably - * lower value (e.g. 255 works). A lower value may help memory usage (slightly) - * and may even improve performance on some systems (and degrade it on others.) - */ -#ifndef ZLIB_IO_MAX -# define ZLIB_IO_MAX ((uInt)-1) -#endif - /* Save typing and make code easier to understand */ #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ abs((int)((c1).green) - (int)((c2).green)) + \ abs((int)((c1).blue) - (int)((c2).blue))) +/* Added to libpng-1.6.0: scale a 16-bit value in the range 0..65535 to 0..255 + * by dividing by 257 *with rounding*. This macro is exact for the given range. + * See the discourse in pngrtran.c png_do_scale_16_to_8. The values in the + * macro were established by experiment (modifying the added value). The macro + * has a second variant that takes a value already scaled by 255 and divides by + * 65535 - this has a maximum error of .502. Over the range 0..65535*65535 it + * only gives off-by-one errors and only for 0.5% (1 in 200) of the values. + */ +#define PNG_DIV65535(v24) (((v24) + 32895) >> 16) +#define PNG_DIV257(v16) PNG_DIV65535((png_uint_32)(v16) * 255) + /* Added to libpng-1.2.6 JB */ #define PNG_ROWBYTES(pixel_bits, width) \ ((pixel_bits) >= 8 ? \ @@ -608,7 +665,7 @@ /* The fixed point conversion performs range checking and evaluates * its argument multiple times, so must be used with care. The * range checking uses the PNG specification values for a signed - * 32 bit fixed point value except that the values are deliberately + * 32-bit fixed point value except that the values are deliberately * rounded-to-zero to an integral value - 21474 (21474.83 is roughly * (2^31-1) * 100000). 's' is a string that describes the value being * converted. @@ -624,12 +681,10 @@ #ifdef PNG_FIXED_POINT_MACRO_SUPPORTED #define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\ ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0)) -#else -#ifndef PNG_VERSION_INFO_ONLY -PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, - png_const_charp text)); -#endif /* !PNG_VERSION_INFO_ONLY */ #endif +/* else the corresponding function is defined below, inside the scope of the + * cplusplus test. + */ #endif /* Constants for known chunk types. If you need to add a chunk, define the name @@ -646,53 +701,82 @@ PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, * architectures where (int) is only 16 bits. */ #define PNG_32b(b,s) ((png_uint_32)(b) << (s)) -#define PNG_CHUNK(b1,b2,b3,b4) \ +#define PNG_U32(b1,b2,b3,b4) \ (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0)) -#define png_IHDR PNG_CHUNK( 73, 72, 68, 82) -#define png_IDAT PNG_CHUNK( 73, 68, 65, 84) -#define png_IEND PNG_CHUNK( 73, 69, 78, 68) -#define png_PLTE PNG_CHUNK( 80, 76, 84, 69) -#define png_bKGD PNG_CHUNK( 98, 75, 71, 68) -#define png_cHRM PNG_CHUNK( 99, 72, 82, 77) -#define png_gAMA PNG_CHUNK(103, 65, 77, 65) -#define png_hIST PNG_CHUNK(104, 73, 83, 84) -#define png_iCCP PNG_CHUNK(105, 67, 67, 80) -#define png_iTXt PNG_CHUNK(105, 84, 88, 116) -#define png_oFFs PNG_CHUNK(111, 70, 70, 115) -#define png_pCAL PNG_CHUNK(112, 67, 65, 76) -#define png_sCAL PNG_CHUNK(115, 67, 65, 76) -#define png_pHYs PNG_CHUNK(112, 72, 89, 115) -#define png_sBIT PNG_CHUNK(115, 66, 73, 84) -#define png_sPLT PNG_CHUNK(115, 80, 76, 84) -#define png_sRGB PNG_CHUNK(115, 82, 71, 66) -#define png_sTER PNG_CHUNK(115, 84, 69, 82) -#define png_tEXt PNG_CHUNK(116, 69, 88, 116) -#define png_tIME PNG_CHUNK(116, 73, 77, 69) -#define png_tRNS PNG_CHUNK(116, 82, 78, 83) -#define png_zTXt PNG_CHUNK(122, 84, 88, 116) +/* Constants for known chunk types. + * + * MAINTAINERS: If you need to add a chunk, define the name here. + * For historical reasons these constants have the form png_<name>; i.e. + * the prefix is lower case. Please use decimal values as the parameters to + * match the ISO PNG specification and to avoid relying on the C locale + * interpretation of character values. Please keep the list sorted. + * + * Notice that PNG_U32 is used to define a 32-bit value for the 4 byte chunk + * type. In fact the specification does not express chunk types this way, + * however using a 32-bit value means that the chunk type can be read from the + * stream using exactly the same code as used for a 32-bit unsigned value and + * can be examined far more efficiently (using one arithmetic compare). + * + * Prior to 1.5.6 the chunk type constants were expressed as C strings. The + * libpng API still uses strings for 'unknown' chunks and a macro, + * PNG_STRING_FROM_CHUNK, allows a string to be generated if required. Notice + * that for portable code numeric values must still be used; the string "IHDR" + * is not portable and neither is PNG_U32('I', 'H', 'D', 'R'). + * + * In 1.7.0 the definitions will be made public in png.h to avoid having to + * duplicate the same definitions in application code. + */ +#define png_IDAT PNG_U32( 73, 68, 65, 84) +#define png_IEND PNG_U32( 73, 69, 78, 68) +#define png_IHDR PNG_U32( 73, 72, 68, 82) +#define png_PLTE PNG_U32( 80, 76, 84, 69) +#define png_bKGD PNG_U32( 98, 75, 71, 68) +#define png_cHRM PNG_U32( 99, 72, 82, 77) +#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */ +#define png_gAMA PNG_U32(103, 65, 77, 65) +#define png_gIFg PNG_U32(103, 73, 70, 103) +#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */ +#define png_gIFx PNG_U32(103, 73, 70, 120) +#define png_hIST PNG_U32(104, 73, 83, 84) +#define png_iCCP PNG_U32(105, 67, 67, 80) +#define png_iTXt PNG_U32(105, 84, 88, 116) +#define png_oFFs PNG_U32(111, 70, 70, 115) +#define png_pCAL PNG_U32(112, 67, 65, 76) +#define png_pHYs PNG_U32(112, 72, 89, 115) +#define png_sBIT PNG_U32(115, 66, 73, 84) +#define png_sCAL PNG_U32(115, 67, 65, 76) +#define png_sPLT PNG_U32(115, 80, 76, 84) +#define png_sRGB PNG_U32(115, 82, 71, 66) +#define png_sTER PNG_U32(115, 84, 69, 82) +#define png_tEXt PNG_U32(116, 69, 88, 116) +#define png_tIME PNG_U32(116, 73, 77, 69) +#define png_tRNS PNG_U32(116, 82, 78, 83) +#define png_zTXt PNG_U32(122, 84, 88, 116) /* The following will work on (signed char*) strings, whereas the get_uint_32 * macro will fail on top-bit-set values because of the sign extension. */ #define PNG_CHUNK_FROM_STRING(s)\ - PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3]) + PNG_U32(0xff & (s)[0], 0xff & (s)[1], 0xff & (s)[2], 0xff & (s)[3]) /* This uses (char), not (png_byte) to avoid warnings on systems where (char) is * signed and the argument is a (char[]) This macro will fail miserably on * systems where (char) is more than 8 bits. */ #define PNG_STRING_FROM_CHUNK(s,c)\ - (void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\ - ((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c))) + (void)(((char*)(s))[0]=(char)(((c)>>24) & 0xff), \ + ((char*)(s))[1]=(char)(((c)>>16) & 0xff),\ + ((char*)(s))[2]=(char)(((c)>>8) & 0xff), \ + ((char*)(s))[3]=(char)((c & 0xff))) /* Do the same but terminate with a null character. */ #define PNG_CSTRING_FROM_CHUNK(s,c)\ (void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0) /* Test on flag values as defined in the spec (section 5.4): */ -#define PNG_CHUNK_ANCILLIARY(c) (1 & ((c) >> 29)) -#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLIARY(c)) +#define PNG_CHUNK_ANCILLARY(c) (1 & ((c) >> 29)) +#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLARY(c)) #define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) #define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) #define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) @@ -710,117 +794,204 @@ PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, #include "pngstruct.h" #include "pnginfo.h" -/* This is used for 16 bit gamma tables -- only the top level pointers are +/* Validate the include paths - the include path used to generate pnglibconf.h + * must match that used in the build, or we must be using pnglibconf.h.prebuilt: + */ +#if PNG_ZLIB_VERNUM != 0 && PNG_ZLIB_VERNUM != ZLIB_VERNUM +# error ZLIB_VERNUM != PNG_ZLIB_VERNUM \ + "-I (include path) error: see the notes in pngpriv.h" + /* This means that when pnglibconf.h was built the copy of zlib.h that it + * used is not the same as the one being used here. Because the build of + * libpng makes decisions to use inflateInit2 and inflateReset2 based on the + * zlib version number and because this affects handling of certain broken + * PNG files the -I directives must match. + * + * The most likely explanation is that you passed a -I in CFLAGS. This will + * not work; all the preprocessor directories and in particular all the -I + * directives must be in CPPFLAGS. + */ +#endif + +/* This is used for 16-bit gamma tables -- only the top level pointers are * const; this could be changed: */ typedef const png_uint_16p * png_const_uint_16pp; +/* Added to libpng-1.5.7: sRGB conversion tables */ +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]); + /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value, + * 0..65535. This table gives the closest 16-bit answers (no errors). + */ +#endif + +PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]); +PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]); + +#define PNG_sRGB_FROM_LINEAR(linear) \ + ((png_byte)(0xff & ((png_sRGB_base[(linear)>>15] \ + + ((((linear) & 0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8))) + /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB + * encoded value with maximum error 0.646365. Note that the input is not a + * 16-bit value; it has been multiplied by 255! */ +#endif /* SIMPLIFIED_READ/WRITE */ + + /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ -/* These functions are used internally in the code. They generally - * shouldn't be used unless you are writing code to add or replace some - * functionality in libpng. More information about most functions can - * be found in the files where the functions are located. +/* Internal functions; these are not exported from a DLL however because they + * are used within several of the C source files they have to be C extern. + * + * All of these functions must be declared with PNG_INTERNAL_FUNCTION. */ +/* Zlib support */ +#define PNG_UNEXPECTED_ZLIB_RETURN (-7) +PNG_INTERNAL_FUNCTION(void, png_zstream_error,(png_structrp png_ptr, int ret), + PNG_EMPTY); + /* Used by the zlib handling functions to ensure that z_stream::msg is always + * set before they return. + */ + +#ifdef PNG_WRITE_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_free_buffer_list,(png_structrp png_ptr, + png_compression_bufferp *list),PNG_EMPTY); + /* Free the buffer list used by the compressed write code. */ +#endif + +#if defined(PNG_FLOATING_POINT_SUPPORTED) && \ + !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) && \ + (defined(PNG_gAMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED) || \ + defined(PNG_sCAL_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)) || \ + (defined(PNG_sCAL_SUPPORTED) && \ + defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)) +PNG_INTERNAL_FUNCTION(png_fixed_point,png_fixed,(png_const_structrp png_ptr, + double fp, png_const_charp text),PNG_EMPTY); +#endif + /* Check the user version string for compatibility, returns false if the version * numbers aren't compatible. */ -PNG_EXTERN int png_user_version_check(png_structp png_ptr, - png_const_charp user_png_ver); +PNG_INTERNAL_FUNCTION(int,png_user_version_check,(png_structrp png_ptr, + png_const_charp user_png_ver),PNG_EMPTY); -/* Allocate memory for an internal libpng struct */ -PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)), - PNG_ALLOCATED); +/* Internal base allocator - no messages, NULL on failure to allocate. This + * does, however, call the application provided allocator and that could call + * png_error (although that would be a bug in the application implementation.) + */ +PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_base,(png_const_structrp png_ptr, + png_alloc_size_t size),PNG_ALLOCATED); -/* Free memory from internal libpng struct */ -PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); +#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\ + defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) +/* Internal array allocator, outputs no error or warning messages on failure, + * just returns NULL. + */ +PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_array,(png_const_structrp png_ptr, + int nelements, size_t element_size),PNG_ALLOCATED); -PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2, - PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)), - PNG_ALLOCATED); -PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, - png_free_ptr free_fn, png_voidp mem_ptr)); +/* The same but an existing array is extended by add_elements. This function + * also memsets the new elements to 0 and copies the old elements. The old + * array is not freed or altered. + */ +PNG_INTERNAL_FUNCTION(png_voidp,png_realloc_array,(png_const_structrp png_ptr, + png_const_voidp array, int old_elements, int add_elements, + size_t element_size),PNG_ALLOCATED); +#endif /* text, sPLT or unknown chunks */ + +/* Magic to create a struct when there is no struct to call the user supplied + * memory allocators. Because error handling has not been set up the memory + * handlers can't safely call png_error, but this is an obscure and undocumented + * restriction so libpng has to assume that the 'free' handler, at least, might + * call png_error. + */ +PNG_INTERNAL_FUNCTION(png_structp,png_create_png_struct, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn, + png_free_ptr free_fn),PNG_ALLOCATED); + +/* Free memory from internal libpng struct */ +PNG_INTERNAL_FUNCTION(void,png_destroy_png_struct,(png_structrp png_ptr), + PNG_EMPTY); -/* Free any memory that info_ptr points to and reset struct. */ -PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr)); +/* Free an allocated jmp_buf (always succeeds) */ +PNG_INTERNAL_FUNCTION(void,png_free_jmpbuf,(png_structrp png_ptr),PNG_EMPTY); /* Function to allocate memory for zlib. PNGAPI is disallowed. */ -PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items, - uInt size)),PNG_ALLOCATED); +PNG_INTERNAL_FUNCTION(voidpf,png_zalloc,(voidpf png_ptr, uInt items, uInt size), + PNG_ALLOCATED); /* Function to free memory for zlib. PNGAPI is disallowed. */ -PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); +PNG_INTERNAL_FUNCTION(void,png_zfree,(voidpf png_ptr, voidpf ptr),PNG_EMPTY); /* Next four functions are used internally as callbacks. PNGCBAPI is required * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to * PNGCBAPI at 1.5.0 */ -PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_read_data,(png_structp png_ptr, + png_bytep data, png_size_t length),PNG_EMPTY); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t length)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_push_fill_buffer,(png_structp png_ptr, + png_bytep buffer, png_size_t length),PNG_EMPTY); #endif -PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_write_data,(png_structp png_ptr, + png_bytep data, png_size_t length),PNG_EMPTY); #ifdef PNG_WRITE_FLUSH_SUPPORTED # ifdef PNG_STDIO_SUPPORTED -PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_flush,(png_structp png_ptr), + PNG_EMPTY); # endif #endif /* Reset the CRC variable */ -PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_reset_crc,(png_structrp png_ptr),PNG_EMPTY); /* Write the "data" buffer to whatever output you are using */ -PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, - png_const_bytep data, png_size_t length)); +PNG_INTERNAL_FUNCTION(void,png_write_data,(png_structrp png_ptr, + png_const_bytep data, png_size_t length),PNG_EMPTY); /* Read and check the PNG file signature */ -PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_read_sig,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); /* Read the chunk header (length + type name) */ -PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(png_uint_32,png_read_chunk_header,(png_structrp png_ptr), + PNG_EMPTY); /* Read data from whatever input you are using into the "data" buffer */ -PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); +PNG_INTERNAL_FUNCTION(void,png_read_data,(png_structrp png_ptr, png_bytep data, + png_size_t length),PNG_EMPTY); /* Read bytes into buf, and update png_ptr->crc */ -PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, - png_size_t length)); - -/* Decompress data in a chunk that uses compression */ -#if defined(PNG_READ_COMPRESSED_TEXT_SUPPORTED) -PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, - int comp_type, png_size_t chunklength, png_size_t prefix_length, - png_size_t *data_length)); -#endif +PNG_INTERNAL_FUNCTION(void,png_crc_read,(png_structrp png_ptr, png_bytep buf, + png_uint_32 length),PNG_EMPTY); /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ -PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); +PNG_INTERNAL_FUNCTION(int,png_crc_finish,(png_structrp png_ptr, + png_uint_32 skip),PNG_EMPTY); /* Read the CRC from the file and compare it to the libpng calculated CRC */ -PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(int,png_crc_error,(png_structrp png_ptr),PNG_EMPTY); /* Calculate the CRC over a section of data. Note that we are only * passing a maximum of 64K on systems that have this as a memory limit, * since this is the maximum buffer size we can specify. */ -PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, - png_const_bytep ptr, png_size_t length)); +PNG_INTERNAL_FUNCTION(void,png_calculate_crc,(png_structrp png_ptr, + png_const_bytep ptr, png_size_t length),PNG_EMPTY); #ifdef PNG_WRITE_FLUSH_SUPPORTED -PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_flush,(png_structrp png_ptr),PNG_EMPTY); #endif /* Write various chunks */ @@ -828,136 +999,130 @@ PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); /* Write the IHDR chunk, and update the png_struct with the necessary * information. */ -PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, - png_uint_32 height, - int bit_depth, int color_type, int compression_method, int filter_method, - int interlace_method)); +PNG_INTERNAL_FUNCTION(void,png_write_IHDR,(png_structrp png_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, + int compression_method, int filter_method, int interlace_method),PNG_EMPTY); -PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, - png_const_colorp palette, png_uint_32 num_pal)); +PNG_INTERNAL_FUNCTION(void,png_write_PLTE,(png_structrp png_ptr, + png_const_colorp palette, png_uint_32 num_pal),PNG_EMPTY); -PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); +PNG_INTERNAL_FUNCTION(void,png_compress_IDAT,(png_structrp png_ptr, + png_const_bytep row_data, png_alloc_size_t row_data_length, int flush), + PNG_EMPTY); -PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_write_IEND,(png_structrp png_ptr),PNG_EMPTY); #ifdef PNG_WRITE_gAMA_SUPPORTED -# ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); -# endif -PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, - png_fixed_point file_gamma)); +PNG_INTERNAL_FUNCTION(void,png_write_gAMA_fixed,(png_structrp png_ptr, + png_fixed_point file_gamma),PNG_EMPTY); #endif #ifdef PNG_WRITE_sBIT_SUPPORTED -PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, - png_const_color_8p sbit, int color_type)); +PNG_INTERNAL_FUNCTION(void,png_write_sBIT,(png_structrp png_ptr, + png_const_color_8p sbit, int color_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_cHRM_SUPPORTED -# ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, - double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y)); -# endif -PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); +PNG_INTERNAL_FUNCTION(void,png_write_cHRM_fixed,(png_structrp png_ptr, + const png_xy *xy), PNG_EMPTY); + /* The xy value must have been previously validated */ #endif #ifdef PNG_WRITE_sRGB_SUPPORTED -PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, - int intent)); +PNG_INTERNAL_FUNCTION(void,png_write_sRGB,(png_structrp png_ptr, + int intent),PNG_EMPTY); #endif #ifdef PNG_WRITE_iCCP_SUPPORTED -PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, - png_const_charp name, int compression_type, - png_const_charp profile, int proflen)); - /* Note to maintainer: profile should be png_bytep */ +PNG_INTERNAL_FUNCTION(void,png_write_iCCP,(png_structrp png_ptr, + png_const_charp name, png_const_bytep profile), PNG_EMPTY); + /* The profile must have been previously validated for correctness, the + * length comes from the first four bytes. Only the base, deflate, + * compression is supported. + */ #endif #ifdef PNG_WRITE_sPLT_SUPPORTED -PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, - png_const_sPLT_tp palette)); +PNG_INTERNAL_FUNCTION(void,png_write_sPLT,(png_structrp png_ptr, + png_const_sPLT_tp palette),PNG_EMPTY); #endif #ifdef PNG_WRITE_tRNS_SUPPORTED -PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_write_tRNS,(png_structrp png_ptr, png_const_bytep trans, png_const_color_16p values, int number, - int color_type)); + int color_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_bKGD_SUPPORTED -PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, - png_const_color_16p values, int color_type)); +PNG_INTERNAL_FUNCTION(void,png_write_bKGD,(png_structrp png_ptr, + png_const_color_16p values, int color_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_hIST_SUPPORTED -PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, - png_const_uint_16p hist, int num_hist)); +PNG_INTERNAL_FUNCTION(void,png_write_hIST,(png_structrp png_ptr, + png_const_uint_16p hist, int num_hist),PNG_EMPTY); #endif +/* Chunks that have keywords */ #ifdef PNG_WRITE_tEXt_SUPPORTED -PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key, - png_const_charp text, png_size_t text_len)); +PNG_INTERNAL_FUNCTION(void,png_write_tEXt,(png_structrp png_ptr, + png_const_charp key, png_const_charp text, png_size_t text_len),PNG_EMPTY); #endif #ifdef PNG_WRITE_zTXt_SUPPORTED -PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key, - png_const_charp text, png_size_t text_len, int compression)); +PNG_INTERNAL_FUNCTION(void,png_write_zTXt,(png_structrp png_ptr, png_const_charp + key, png_const_charp text, int compression),PNG_EMPTY); #endif #ifdef PNG_WRITE_iTXt_SUPPORTED -PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_write_iTXt,(png_structrp png_ptr, int compression, png_const_charp key, png_const_charp lang, - png_const_charp lang_key, png_const_charp text)); + png_const_charp lang_key, png_const_charp text),PNG_EMPTY); #endif #ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ -PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, - png_infop info_ptr, png_const_textp text_ptr, int num_text)); +PNG_INTERNAL_FUNCTION(int,png_set_text_2,(png_const_structrp png_ptr, + png_inforp info_ptr, png_const_textp text_ptr, int num_text),PNG_EMPTY); #endif #ifdef PNG_WRITE_oFFs_SUPPORTED -PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, - png_int_32 x_offset, png_int_32 y_offset, int unit_type)); +PNG_INTERNAL_FUNCTION(void,png_write_oFFs,(png_structrp png_ptr, + png_int_32 x_offset, png_int_32 y_offset, int unit_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_pCAL_SUPPORTED -PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, - png_int_32 X0, png_int_32 X1, int type, int nparams, - png_const_charp units, png_charpp params)); +PNG_INTERNAL_FUNCTION(void,png_write_pCAL,(png_structrp png_ptr, + png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, + png_const_charp units, png_charpp params),PNG_EMPTY); #endif #ifdef PNG_WRITE_pHYs_SUPPORTED -PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_write_pHYs,(png_structrp png_ptr, png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, - int unit_type)); + int unit_type),PNG_EMPTY); #endif #ifdef PNG_WRITE_tIME_SUPPORTED -PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, - png_const_timep mod_time)); +PNG_INTERNAL_FUNCTION(void,png_write_tIME,(png_structrp png_ptr, + png_const_timep mod_time),PNG_EMPTY); #endif #ifdef PNG_WRITE_sCAL_SUPPORTED -PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, - int unit, png_const_charp width, png_const_charp height)); +PNG_INTERNAL_FUNCTION(void,png_write_sCAL_s,(png_structrp png_ptr, + int unit, png_const_charp width, png_const_charp height),PNG_EMPTY); #endif /* Called when finished processing a row of data */ -PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_write_finish_row,(png_structrp png_ptr), + PNG_EMPTY); /* Internal use only. Called before first row of data */ -PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_write_start_row,(png_structrp png_ptr), + PNG_EMPTY); /* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an * array of png_ptr->width pixels. If the image is not interlaced or this - * is the final pass this just does a png_memcpy, otherwise the "display" flag + * is the final pass this just does a memcpy, otherwise the "display" flag * is used to determine whether to copy pixels that are not in the current pass. * * Because 'png_do_read_interlace' (below) replicates pixels this allows this @@ -981,8 +1146,8 @@ PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); #ifndef PNG_USE_COMPILE_TIME_MASKS # define PNG_USE_COMPILE_TIME_MASKS 1 #endif -PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, - int display)); +PNG_INTERNAL_FUNCTION(void,png_combine_row,(png_const_structrp png_ptr, + png_bytep row, int display),PNG_EMPTY); #ifdef PNG_READ_INTERLACING_SUPPORTED /* Expand an interlaced row: the 'row_info' describes the pass data that has @@ -991,188 +1156,107 @@ PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, * the pixels are *replicated* to the intervening space. This is essential for * the correct operation of png_combine_row, above. */ -PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass, png_uint_32 transformations)); +PNG_INTERNAL_FUNCTION(void,png_do_read_interlace,(png_row_infop row_info, + png_bytep row, int pass, png_uint_32 transformations),PNG_EMPTY); #endif /* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Grab pixels out of a row for an interlaced pass */ -PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass)); +PNG_INTERNAL_FUNCTION(void,png_do_write_interlace,(png_row_infop row_info, + png_bytep row, int pass),PNG_EMPTY); #endif /* Unfilter a row: check the filter value before calling this, there is no point * calling it for PNG_FILTER_VALUE_NONE. */ -PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop - row_info, png_bytep row, png_const_bytep prev_row, int filter)); - -PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_sub3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_sub4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_avg3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_avg4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_paeth3_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); -PNG_EXTERN void png_read_filter_row_paeth4_neon PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep prev_row)); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row,(png_structrp pp, png_row_infop + row_info, png_bytep row, png_const_bytep prev_row, int filter),PNG_EMPTY); + +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_up_neon,(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_neon,(png_row_infop + row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub4_neon,(png_row_infop + row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg3_neon,(png_row_infop + row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_neon,(png_row_infop + row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_neon,(png_row_infop + row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_neon,(png_row_infop + row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); /* Choose the best filter to use and filter the row data */ -PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_write_find_filter,(png_structrp png_ptr, + png_row_infop row_info),PNG_EMPTY); + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_read_IDAT_data,(png_structrp png_ptr, + png_bytep output, png_alloc_size_t avail_out),PNG_EMPTY); + /* Read 'avail_out' bytes of data from the IDAT stream. If the output buffer + * is NULL the function checks, instead, for the end of the stream. In this + * case a benign error will be issued if the stream end is not found or if + * extra data has to be consumed. + */ +PNG_INTERNAL_FUNCTION(void,png_read_finish_IDAT,(png_structrp png_ptr), + PNG_EMPTY); + /* This cleans up when the IDAT LZ stream does not end when the last image + * byte is read; there is still some pending input. + */ -/* Finish a row while reading, dealing with interlacing passes, etc. */ -PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_read_finish_row,(png_structrp png_ptr), + PNG_EMPTY); + /* Finish a row while reading, dealing with interlacing passes, etc. */ +#endif /* SEQUENTIAL_READ */ /* Initialize the row buffers, etc. */ -PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_read_start_row,(png_structrp png_ptr),PNG_EMPTY); + +#if PNG_ZLIB_VERNUM >= 0x1240 +PNG_INTERNAL_FUNCTION(int,png_zlib_inflate,(png_structrp png_ptr, int flush), + PNG_EMPTY); +# define PNG_INFLATE(pp, flush) png_zlib_inflate(pp, flush) +#else /* Zlib < 1.2.4 */ +# define PNG_INFLATE(pp, flush) inflate(&(pp)->zstream, flush) +#endif /* Zlib < 1.2.4 */ #ifdef PNG_READ_TRANSFORMS_SUPPORTED /* Optional call to update the users info structure */ -PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif - -/* These are the functions that do the transformations */ -#ifdef PNG_READ_FILLER_SUPPORTED -PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 filler, png_uint_32 flags)); -#endif - -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED -PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED -PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_read_transform_info,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); #endif +/* Shared transform functions, defined in pngtran.c */ #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info, - png_bytep row, int at_start)); +PNG_INTERNAL_FUNCTION(void,png_do_strip_channel,(png_row_infop row_info, + png_bytep row, int at_start),PNG_EMPTY); #endif #ifdef PNG_16BIT_SUPPORTED #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_swap,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) -PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, - png_row_infop row_info, png_bytep row)); -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED -PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_PACK_SUPPORTED -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_SHIFT_SUPPORTED -PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_8p sig_bits)); +PNG_INTERNAL_FUNCTION(void,png_do_packswap,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED -PNG_EXTERN void png_do_scale_16_to_8 PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED -PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_READ_QUANTIZE_SUPPORTED -PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info, - png_bytep row, png_const_bytep palette_lookup, - png_const_bytep quantize_lookup)); - -# ifdef PNG_CORRECT_PALETTE_SUPPORTED -PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette)); -# endif +PNG_INTERNAL_FUNCTION(void,png_do_invert,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#ifdef PNG_WRITE_PACK_SUPPORTED -PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 bit_depth)); -#endif - -#ifdef PNG_WRITE_SHIFT_SUPPORTED -PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_8p bit_depth)); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) -PNG_EXTERN void png_do_compose PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED -PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED -PNG_EXTERN void png_do_encode_alpha PNGARG((png_row_infop row_info, - png_bytep row, png_structp png_ptr)); -#endif - -#ifdef PNG_READ_EXPAND_SUPPORTED -PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, - png_bytep row, png_const_colorp palette, png_const_bytep trans, - int num_trans)); -PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, - png_bytep row, png_const_color_16p trans_color)); -#endif - -#ifdef PNG_READ_EXPAND_16_SUPPORTED -PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info, - png_bytep row)); +PNG_INTERNAL_FUNCTION(void,png_do_bgr,(png_row_infop row_info, + png_bytep row),PNG_EMPTY); #endif /* The following decodes the appropriate chunks, and does error correction, @@ -1180,251 +1264,279 @@ PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info, */ /* Decode the IHDR chunk */ -PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_IHDR,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_handle_PLTE,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_handle_IEND,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #ifdef PNG_READ_bKGD_SUPPORTED -PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_bKGD,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_cHRM_SUPPORTED -PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_cHRM,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_gAMA_SUPPORTED -PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_gAMA,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_hIST_SUPPORTED -PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_hIST,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_iCCP_SUPPORTED -PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif /* PNG_READ_iCCP_SUPPORTED */ +PNG_INTERNAL_FUNCTION(void,png_handle_iCCP,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +#endif /* READ_iCCP */ #ifdef PNG_READ_iTXt_SUPPORTED -PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_iTXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_oFFs_SUPPORTED -PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_oFFs,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_pCAL_SUPPORTED -PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_pCAL,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_pHYs_SUPPORTED -PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_pHYs,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_sBIT_SUPPORTED -PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_sBIT,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_sCAL_SUPPORTED -PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_sCAL,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_sPLT_SUPPORTED -PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif /* PNG_READ_sPLT_SUPPORTED */ +PNG_INTERNAL_FUNCTION(void,png_handle_sPLT,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +#endif /* READ_sPLT */ #ifdef PNG_READ_sRGB_SUPPORTED -PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_sRGB,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_tEXt_SUPPORTED -PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_tEXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_tIME_SUPPORTED -PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_tIME,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_tRNS_SUPPORTED -PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_tRNS,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif #ifdef PNG_READ_zTXt_SUPPORTED -PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_handle_zTXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); #endif -PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); +PNG_INTERNAL_FUNCTION(void,png_check_chunk_name,(png_structrp png_ptr, + png_uint_32 chunk_name),PNG_EMPTY); -PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, - png_uint_32 chunk_name)); +PNG_INTERNAL_FUNCTION(void,png_handle_unknown,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length, int keep),PNG_EMPTY); + /* This is the function that gets called for unknown chunks. The 'keep' + * argument is either non-zero for a known chunk that has been set to be + * handled as unknown or zero for an unknown chunk. By default the function + * just skips the chunk or errors out if it is critical. + */ -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -/* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk - * name, not a string. - */ -PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr, - png_uint_32 chunk_name)); -#endif +#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) ||\ + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) +PNG_INTERNAL_FUNCTION(int,png_chunk_unknown_handling, + (png_const_structrp png_ptr, png_uint_32 chunk_name),PNG_EMPTY); + /* Exactly as the API png_handle_as_unknown() except that the argument is a + * 32-bit chunk name, not a string. + */ +#endif /* READ_UNKNOWN_CHUNKS || HANDLE_AS_UNKNOWN */ /* Handle the transformations for reading and writing */ #ifdef PNG_READ_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_do_read_transformations,(png_structrp png_ptr, + png_row_infop row_info),PNG_EMPTY); #endif #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_do_write_transformations,(png_structrp png_ptr, + png_row_infop row_info),PNG_EMPTY); #endif #ifdef PNG_READ_TRANSFORMS_SUPPORTED -PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_init_read_transformations,(png_structrp png_ptr), + PNG_EMPTY); #endif #ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); -PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_read_chunk,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_sig,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_check_crc,(png_structrp png_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_save_buffer,(png_structrp png_ptr), + PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_restore_buffer,(png_structrp png_ptr, + png_bytep buffer, png_size_t buffer_length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_IDAT,(png_structrp png_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_process_IDAT_data,(png_structrp png_ptr, + png_bytep buffer, png_size_t buffer_length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_process_row,(png_structrp png_ptr), + PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_handle_unknown,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_have_info,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_have_end,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_have_row,(png_structrp png_ptr, + png_bytep row),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_end,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_process_some_data,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_read_push_finish_row,(png_structrp png_ptr), + PNG_EMPTY); # ifdef PNG_READ_tEXt_SUPPORTED -PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_handle_tEXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_tEXt,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); # endif # ifdef PNG_READ_zTXt_SUPPORTED -PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_handle_zTXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_zTXt,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); # endif # ifdef PNG_READ_iTXt_SUPPORTED -PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); +PNG_INTERNAL_FUNCTION(void,png_push_handle_iTXt,(png_structrp png_ptr, + png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_push_read_iTXt,(png_structrp png_ptr, + png_inforp info_ptr),PNG_EMPTY); # endif -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ +#endif /* PROGRESSIVE_READ */ -#ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); -PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, - png_bytep row)); -#endif +/* Added at libpng version 1.6.0 */ +#ifdef PNG_GAMMA_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_colorspace_set_gamma,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_fixed_point gAMA), PNG_EMPTY); + /* Set the colorspace gamma with a value provided by the application or by + * the gAMA chunk on read. The value will override anything set by an ICC + * profile. + */ -/* Added at libpng version 1.4.0 */ -#ifdef PNG_CHECK_cHRM_SUPPORTED -PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, - png_fixed_point int_white_x, png_fixed_point int_white_y, - png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point - int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif +PNG_INTERNAL_FUNCTION(void,png_colorspace_sync_info,(png_const_structrp png_ptr, + png_inforp info_ptr), PNG_EMPTY); + /* Synchronize the info 'valid' flags with the colorspace */ -#ifdef PNG_CHECK_cHRM_SUPPORTED -/* Added at libpng version 1.2.34 and 1.4.0 */ -/* Currently only used by png_check_cHRM_fixed */ -PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, - unsigned long *hi_product, unsigned long *lo_product)); +PNG_INTERNAL_FUNCTION(void,png_colorspace_sync,(png_const_structrp png_ptr, + png_inforp info_ptr), PNG_EMPTY); + /* Copy the png_struct colorspace to the info_struct and call the above to + * synchronize the flags. Checks for NULL info_ptr and does nothing. + */ #endif -#ifdef PNG_cHRM_SUPPORTED -/* Added at libpng version 1.5.5 */ -typedef struct png_xy -{ - png_fixed_point redx, redy; - png_fixed_point greenx, greeny; - png_fixed_point bluex, bluey; - png_fixed_point whitex, whitey; -} png_xy; - -typedef struct png_XYZ -{ - png_fixed_point redX, redY, redZ; - png_fixed_point greenX, greenY, greenZ; - png_fixed_point blueX, blueY, blueZ; -} png_XYZ; - -/* The conversion APIs return 0 on success, non-zero on a parameter error. They - * allow conversion between the above representations of a color encoding. When - * converting from XYZ end points to chromaticities the absolute magnitude of - * the end points is lost, when converting back the sum of the Y values of the - * three end points will be 1.0 - */ -PNG_EXTERN int png_xy_from_XYZ PNGARG((png_xy *xy, png_XYZ XYZ)); -PNG_EXTERN int png_XYZ_from_xy PNGARG((png_XYZ *XYZ, png_xy xy)); -PNG_EXTERN int png_XYZ_from_xy_checked PNGARG((png_structp png_ptr, - png_XYZ *XYZ, png_xy xy)); +/* Added at libpng version 1.4.0 */ +#ifdef PNG_COLORSPACE_SUPPORTED +/* These internal functions are for maintaining the colorspace structure within + * a png_info or png_struct (or, indeed, both). + */ +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_chromaticities, + (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_xy *xy, + int preferred), PNG_EMPTY); + +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_endpoints, + (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_XYZ *XYZ, + int preferred), PNG_EMPTY); + +#ifdef PNG_sRGB_SUPPORTED +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_sRGB,(png_const_structrp png_ptr, + png_colorspacerp colorspace, int intent), PNG_EMPTY); + /* This does set the colorspace gAMA and cHRM values too, but doesn't set the + * flags to write them, if it returns false there was a problem and an error + * message has already been output (but the colorspace may still need to be + * synced to record the invalid flag). + */ +#endif /* sRGB */ + +#ifdef PNG_iCCP_SUPPORTED +PNG_INTERNAL_FUNCTION(int,png_colorspace_set_ICC,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length, png_const_bytep profile, int color_type), + PNG_EMPTY); + /* The 'name' is used for information only */ + +/* Routines for checking parts of an ICC profile. */ +PNG_INTERNAL_FUNCTION(int,png_icc_check_length,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length), PNG_EMPTY); +PNG_INTERNAL_FUNCTION(int,png_icc_check_header,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length, + png_const_bytep profile /* first 132 bytes only */, int color_type), + PNG_EMPTY); +PNG_INTERNAL_FUNCTION(int,png_icc_check_tag_table,(png_const_structrp png_ptr, + png_colorspacerp colorspace, png_const_charp name, + png_uint_32 profile_length, + png_const_bytep profile /* header plus whole tag table */), PNG_EMPTY); +#ifdef PNG_sRGB_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_icc_set_sRGB,( + png_const_structrp png_ptr, png_colorspacerp colorspace, + png_const_bytep profile, uLong adler), PNG_EMPTY); + /* 'adler' is the Adler32 checksum of the uncompressed profile data. It may + * be zero to indicate that it is not available. It is used, if provided, + * as a fast check on the profile when checking to see if it is sRGB. + */ #endif +#endif /* iCCP */ + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +PNG_INTERNAL_FUNCTION(void,png_colorspace_set_rgb_coefficients, + (png_structrp png_ptr), PNG_EMPTY); + /* Set the rgb_to_gray coefficients from the colorspace Y values */ +#endif /* READ_RGB_TO_GRAY */ +#endif /* COLORSPACE */ /* Added at libpng version 1.4.0 */ -PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_check_IHDR,(png_const_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, - int filter_type)); + int filter_type),PNG_EMPTY); /* Added at libpng version 1.5.10 */ #if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) -PNG_EXTERN void png_do_check_palette_indexes PNGARG((png_structp png_ptr, - png_row_infop row_info)); +PNG_INTERNAL_FUNCTION(void,png_do_check_palette_indexes, + (png_structrp png_ptr, png_row_infop row_info),PNG_EMPTY); #endif -/* Free all memory used by the read (old method - NOT DLL EXPORTED) */ -PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr, png_infop end_info_ptr)); - -/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ -PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr)); - -#ifdef USE_FAR_KEYWORD /* memory model conversion function */ -PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr, - int check)); -#endif /* USE_FAR_KEYWORD */ - #if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) -PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr, +PNG_INTERNAL_FUNCTION(void,png_fixed_error,(png_const_structrp png_ptr, png_const_charp name),PNG_NORETURN); #endif @@ -1432,8 +1544,8 @@ PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr, * the end. Always leaves the buffer nul terminated. Never errors out (and * there is no error code.) */ -PNG_EXTERN size_t png_safecat(png_charp buffer, size_t bufsize, size_t pos, - png_const_charp string); +PNG_INTERNAL_FUNCTION(size_t,png_safecat,(png_charp buffer, size_t bufsize, + size_t pos, png_const_charp string),PNG_EMPTY); /* Various internal functions to handle formatted warning messages, currently * only implemented for warnings. @@ -1444,8 +1556,8 @@ PNG_EXTERN size_t png_safecat(png_charp buffer, size_t bufsize, size_t pos, * Returns the pointer to the start of the formatted string. This utility only * does unsigned values. */ -PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, - int format, png_alloc_size_t number); +PNG_INTERNAL_FUNCTION(png_charp,png_format_number,(png_const_charp start, + png_charp end, int format, png_alloc_size_t number),PNG_EMPTY); /* Convenience macro that takes an array: */ #define PNG_FORMAT_NUMBER(buffer,format,number) \ @@ -1469,7 +1581,7 @@ PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, #ifdef PNG_WARNINGS_SUPPORTED /* New defines and members adding in libpng-1.5.4 */ # define PNG_WARNING_PARAMETER_SIZE 32 -# define PNG_WARNING_PARAMETER_COUNT 8 +# define PNG_WARNING_PARAMETER_COUNT 8 /* Maximum 9; see pngerror.c */ /* An l-value of this type has to be passed to the APIs below to cache the * values of the parameters to a formatted warning message. @@ -1477,50 +1589,97 @@ PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT][ PNG_WARNING_PARAMETER_SIZE]; -PNG_EXTERN void png_warning_parameter(png_warning_parameters p, int number, - png_const_charp string); - /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters, - * including the trailing '\0'. - */ -PNG_EXTERN void png_warning_parameter_unsigned(png_warning_parameters p, - int number, int format, png_alloc_size_t value); - /* Use png_alloc_size_t because it is an unsigned type as big as any we - * need to output. Use the following for a signed value. - */ -PNG_EXTERN void png_warning_parameter_signed(png_warning_parameters p, - int number, int format, png_int_32 value); - -PNG_EXTERN void png_formatted_warning(png_structp png_ptr, - png_warning_parameters p, png_const_charp message); - /* 'message' follows the X/Open approach of using @1, @2 to insert - * parameters previously supplied using the above functions. Errors in - * specifying the paramters will simple result in garbage substitutions. - */ +PNG_INTERNAL_FUNCTION(void,png_warning_parameter,(png_warning_parameters p, + int number, png_const_charp string),PNG_EMPTY); + /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters, + * including the trailing '\0'. + */ +PNG_INTERNAL_FUNCTION(void,png_warning_parameter_unsigned, + (png_warning_parameters p, int number, int format, png_alloc_size_t value), + PNG_EMPTY); + /* Use png_alloc_size_t because it is an unsigned type as big as any we + * need to output. Use the following for a signed value. + */ +PNG_INTERNAL_FUNCTION(void,png_warning_parameter_signed, + (png_warning_parameters p, int number, int format, png_int_32 value), + PNG_EMPTY); + +PNG_INTERNAL_FUNCTION(void,png_formatted_warning,(png_const_structrp png_ptr, + png_warning_parameters p, png_const_charp message),PNG_EMPTY); + /* 'message' follows the X/Open approach of using @1, @2 to insert + * parameters previously supplied using the above functions. Errors in + * specifying the parameters will simply result in garbage substitutions. + */ #endif +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +/* Application errors (new in 1.6); use these functions (declared below) for + * errors in the parameters or order of API function calls on read. The + * 'warning' should be used for an error that can be handled completely; the + * 'error' for one which can be handled safely but which may lose application + * information or settings. + * + * By default these both result in a png_error call prior to release, while in a + * released version the 'warning' is just a warning. However if the application + * explicitly disables benign errors (explicitly permitting the code to lose + * information) they both turn into warnings. + * + * If benign errors aren't supported they end up as the corresponding base call + * (png_warning or png_error.) + */ +PNG_INTERNAL_FUNCTION(void,png_app_warning,(png_const_structrp png_ptr, + png_const_charp message),PNG_EMPTY); + /* The application provided invalid parameters to an API function or called + * an API function at the wrong time, libpng can completely recover. + */ + +PNG_INTERNAL_FUNCTION(void,png_app_error,(png_const_structrp png_ptr, + png_const_charp message),PNG_EMPTY); + /* As above but libpng will ignore the call, or attempt some other partial + * recovery from the error. + */ +#else +# define png_app_warning(pp,s) png_warning(pp,s) +# define png_app_error(pp,s) png_error(pp,s) +#endif + +PNG_INTERNAL_FUNCTION(void,png_chunk_report,(png_const_structrp png_ptr, + png_const_charp message, int error),PNG_EMPTY); + /* Report a recoverable issue in chunk data. On read this is used to report + * a problem found while reading a particular chunk and the + * png_chunk_benign_error or png_chunk_warning function is used as + * appropriate. On write this is used to report an error that comes from + * data set via an application call to a png_set_ API and png_app_error or + * png_app_warning is used as appropriate. + * + * The 'error' parameter must have one of the following values: + */ +#define PNG_CHUNK_WARNING 0 /* never an error */ +#define PNG_CHUNK_WRITE_ERROR 1 /* an error only on write */ +#define PNG_CHUNK_ERROR 2 /* always an error */ + /* ASCII to FP interfaces, currently only implemented if sCAL * support is required. */ -#ifdef PNG_sCAL_SUPPORTED +#if defined(PNG_sCAL_SUPPORTED) /* MAX_DIGITS is actually the maximum number of characters in an sCAL * width or height, derived from the precision (number of significant - * digits - a build time settable option) and assumpitions about the + * digits - a build time settable option) and assumptions about the * maximum ridiculous exponent. */ #define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/) -#endif -#ifdef PNG_sCAL_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED -PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii, - png_size_t size, double fp, unsigned int precision)); +PNG_INTERNAL_FUNCTION(void,png_ascii_from_fp,(png_const_structrp png_ptr, + png_charp ascii, png_size_t size, double fp, unsigned int precision), + PNG_EMPTY); #endif /* FLOATING_POINT */ #ifdef PNG_FIXED_POINT_SUPPORTED -PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, - png_charp ascii, png_size_t size, png_fixed_point fp)); +PNG_INTERNAL_FUNCTION(void,png_ascii_from_fixed,(png_const_structrp png_ptr, + png_charp ascii, png_size_t size, png_fixed_point fp),PNG_EMPTY); #endif /* FIXED_POINT */ -#endif /* READ_sCAL */ +#endif /* sCAL */ #if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) /* An internal API to validate the format of a floating point number. @@ -1544,7 +1703,7 @@ PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, * NOTE: The dangling E problem. * There is a PNG valid floating point number in the following: * - * PNG floating point numb1.ers are not greedy. + * PNG floating point numbers are not greedy. * * Working this out requires *TWO* character lookahead (because of the * sign), the parser does not do this - it will fail at the 'r' - this @@ -1610,8 +1769,8 @@ PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, * that omits the last character (i.e. set the size to the index of * the problem character.) This has not been tested within libpng. */ -PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string, - png_size_t size, int *statep, png_size_tp whereami)); +PNG_INTERNAL_FUNCTION(int,png_check_fp_number,(png_const_charp string, + png_size_t size, int *statep, png_size_tp whereami),PNG_EMPTY); /* This is the same but it checks a complete string and returns true * only if it just contains a floating point number. As of 1.5.4 this @@ -1619,11 +1778,11 @@ PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string, * it was valid (otherwise it returns 0.) This can be used for testing * for negative or zero values using the sticky flag. */ -PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string, - png_size_t size)); +PNG_INTERNAL_FUNCTION(int,png_check_fp_string,(png_const_charp string, + png_size_t size),PNG_EMPTY); #endif /* pCAL || sCAL */ -#if defined(PNG_READ_GAMMA_SUPPORTED) ||\ +#if defined(PNG_GAMMA_SUPPORTED) ||\ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED) /* Added at libpng version 1.5.0 */ /* This is a utility to provide a*times/div (rounded) and indicate @@ -1631,29 +1790,37 @@ PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string, * for overflow, true (1) if no overflow, in which case *res * holds the result. */ -PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a, - png_int_32 multiplied_by, png_int_32 divided_by)); +PNG_INTERNAL_FUNCTION(int,png_muldiv,(png_fixed_point_p res, png_fixed_point a, + png_int_32 multiplied_by, png_int_32 divided_by),PNG_EMPTY); #endif #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) /* Same deal, but issue a warning on overflow and return 0. */ -PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr, - png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by)); +PNG_INTERNAL_FUNCTION(png_fixed_point,png_muldiv_warn, + (png_const_structrp png_ptr, png_fixed_point a, png_int_32 multiplied_by, + png_int_32 divided_by),PNG_EMPTY); #endif -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED) +#ifdef PNG_GAMMA_SUPPORTED /* Calculate a reciprocal - used for gamma values. This returns - * 0 if the argument is 0 in order to maintain an undefined value, + * 0 if the argument is 0 in order to maintain an undefined value; * there are no warnings. */ -PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a)); +PNG_INTERNAL_FUNCTION(png_fixed_point,png_reciprocal,(png_fixed_point a), + PNG_EMPTY); +#ifdef PNG_READ_GAMMA_SUPPORTED /* The same but gives a reciprocal of the product of two fixed point * values. Accuracy is suitable for gamma calculations but this is - * not exact - use png_muldiv for that. + * not exact - use png_muldiv for that. Only required at present on read. */ -PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a, - png_fixed_point b)); +PNG_INTERNAL_FUNCTION(png_fixed_point,png_reciprocal2,(png_fixed_point a, + png_fixed_point b),PNG_EMPTY); +#endif + +/* Return true if the gamma value is significantly different from 1.0 */ +PNG_INTERNAL_FUNCTION(int,png_gamma_significant,(png_fixed_point gamma_value), + PNG_EMPTY); #endif #ifdef PNG_READ_GAMMA_SUPPORTED @@ -1664,73 +1831,73 @@ PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a, * While the input is an 'unsigned' value it must actually be the * correct bit value - 0..255 or 0..65535 as required. */ -PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr, - unsigned int value, png_fixed_point gamma_value)); -PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value)); -PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value, - png_fixed_point gamma_value)); -PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value, - png_fixed_point gamma_value)); -PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr); -PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, - int bit_depth)); -#endif - -/* Missing declarations if FIXED_POINT is *not* supported - fixed properly - * in libpng 1.6 - */ -#ifndef PNG_FIXED_POINT_SUPPORTED -#ifdef PNG_cHRM_SUPPORTED -PNG_EXTERN png_uint_32 png_get_cHRM_XYZ_fixed PNGARG( - (png_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_red_X, png_fixed_point *int_red_Y, - png_fixed_point *int_red_Z, png_fixed_point *int_green_X, - png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, - png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, - png_fixed_point *int_blue_Z)); -PNG_EXTERN void png_set_cHRM_XYZ_fixed PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, - png_fixed_point int_red_Z, png_fixed_point int_green_X, - png_fixed_point int_green_Y, png_fixed_point int_green_Z, - png_fixed_point int_blue_X, png_fixed_point int_blue_Y, - png_fixed_point int_blue_Z)); -PNG_EXTERN void png_set_cHRM_fixed PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_white_x, - png_fixed_point int_white_y, png_fixed_point int_red_x, - png_fixed_point int_red_y, png_fixed_point int_green_x, - png_fixed_point int_green_y, png_fixed_point int_blue_x, - png_fixed_point int_blue_y)); -#endif - -#ifdef PNG_gAMA_SUPPORTED -PNG_EXTERN png_uint_32 png_get_gAMA_fixed PNGARG( - (png_const_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_file_gamma)); -PNG_EXTERN void png_set_gAMA_fixed PNGARG((png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_file_gamma)); -#endif - -#ifdef PNG_READ_BACKGROUND_SUPPORTED -PNG_EXTERN void png_set_background_fixed PNGARG((png_structp png_ptr, - png_const_color_16p background_color, int background_gamma_code, - int need_expand, png_fixed_point background_gamma)); -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED -PNG_EXTERN void png_set_alpha_mode_fixed PNGARG((png_structp png_ptr, - int mode, png_fixed_point output_gamma)); -#endif +PNG_INTERNAL_FUNCTION(png_uint_16,png_gamma_correct,(png_structrp png_ptr, + unsigned int value, png_fixed_point gamma_value),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(png_uint_16,png_gamma_16bit_correct,(unsigned int value, + png_fixed_point gamma_value),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(png_byte,png_gamma_8bit_correct,(unsigned int value, + png_fixed_point gamma_value),PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_destroy_gamma_table,(png_structrp png_ptr), + PNG_EMPTY); +PNG_INTERNAL_FUNCTION(void,png_build_gamma_table,(png_structrp png_ptr, + int bit_depth),PNG_EMPTY); +#endif + +/* SIMPLIFIED READ/WRITE SUPPORT */ +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) +/* The internal structure that png_image::opaque points to. */ +typedef struct png_control +{ + png_structp png_ptr; + png_infop info_ptr; + png_voidp error_buf; /* Always a jmp_buf at present. */ -#ifdef PNG_READ_GAMMA_SUPPORTED -PNG_EXTERN void png_set_gamma_fixed PNGARG((png_structp png_ptr, - png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); + png_const_bytep memory; /* Memory buffer. */ + png_size_t size; /* Size of the memory buffer. */ + + unsigned int for_write :1; /* Otherwise it is a read structure */ + unsigned int owned_file :1; /* We own the file in io_ptr */ +} png_control; + +/* Return the pointer to the jmp_buf from a png_control: necessary because C + * does not reveal the type of the elements of jmp_buf. + */ +#ifdef __cplusplus +# define png_control_jmp_buf(pc) (((jmp_buf*)((pc)->error_buf))[0]) +#else +# define png_control_jmp_buf(pc) ((pc)->error_buf) #endif -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -PNG_EXTERN void png_set_rgb_to_gray_fixed PNGARG((png_structp png_ptr, - int error_action, png_fixed_point red, png_fixed_point green)); +/* Utility to safely execute a piece of libpng code catching and logging any + * errors that might occur. Returns true on success, false on failure (either + * of the function or as a result of a png_error.) + */ +PNG_INTERNAL_CALLBACK(void,png_safe_error,(png_structp png_ptr, + png_const_charp error_message),PNG_NORETURN); + +#ifdef PNG_WARNINGS_SUPPORTED +PNG_INTERNAL_CALLBACK(void,png_safe_warning,(png_structp png_ptr, + png_const_charp warning_message),PNG_EMPTY); +#else +# define png_safe_warning 0/*dummy argument*/ #endif -#endif /* FIX MISSING !FIXED_POINT DECLARATIONS */ + +PNG_INTERNAL_FUNCTION(int,png_safe_execute,(png_imagep image, + int (*function)(png_voidp), png_voidp arg),PNG_EMPTY); + +/* Utility to log an error; this also cleans up the png_image; the function + * always returns 0 (false). + */ +PNG_INTERNAL_FUNCTION(int,png_image_error,(png_imagep image, + png_const_charp error_message),PNG_EMPTY); + +#ifndef PNG_SIMPLIFIED_READ_SUPPORTED +/* png_image_free is used by the write code but not exported */ +PNG_INTERNAL_FUNCTION(void, png_image_free, (png_imagep image), PNG_EMPTY); +#endif /* !SIMPLIFIED_READ */ + +#endif /* SIMPLIFIED READ/WRITE */ /* These are initialization functions for hardware specific PNG filter * optimizations; list these here then select the appropriate one at compile @@ -1738,17 +1905,21 @@ PNG_EXTERN void png_set_rgb_to_gray_fixed PNGARG((png_structp png_ptr, * the generic code is used. */ #ifdef PNG_FILTER_OPTIMIZATIONS -PNG_EXTERN void PNG_FILTER_OPTIMIZATIONS(png_structp png_ptr, unsigned int bpp); +PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr, + unsigned int bpp), PNG_EMPTY); /* Just declare the optimization that will be used */ #else /* List *all* the possible optimizations here - this branch is required if * the builder of libpng passes the definition of PNG_FILTER_OPTIMIZATIONS in * CFLAGS in place of CPPFLAGS *and* uses symbol prefixing. */ -PNG_EXTERN void png_init_filter_functions_neon(png_structp png_ptr, - unsigned int bpp); +PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_neon, + (png_structp png_ptr, unsigned int bpp), PNG_EMPTY); #endif +PNG_INTERNAL_FUNCTION(png_uint_32, png_check_keyword, (png_structrp png_ptr, + png_const_charp key, png_bytep new_key), PNG_EMPTY); + /* Maintainer: Put new private prototypes here ^ */ #include "pngdebug.h" diff --git a/drivers/png/pngread.c b/drivers/png/pngread.c index b90e017e62..0ff6238023 100644 --- a/drivers/png/pngread.c +++ b/drivers/png/pngread.c @@ -1,8 +1,8 @@ /* pngread.c - read a PNG file * - * Last changed in libpng 1.5.23 [July 23, 2015] - * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.23 [June 9, 2016] + * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -15,6 +15,9 @@ */ #include "pngpriv.h" +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) +# include <errno.h> +#endif #ifdef PNG_READ_SUPPORTED @@ -23,10 +26,12 @@ PNG_FUNCTION(png_structp,PNGAPI png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) { - -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); +#ifndef PNG_USER_MEM_SUPPORTED + png_structp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, NULL, NULL, NULL); +#else + return png_create_read_struct_2(user_png_ver, error_ptr, error_fn, + warn_fn, NULL, NULL, NULL); } /* Alternate create PNG structure for reading, and allocate any memory @@ -37,131 +42,40 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) { -#endif /* PNG_USER_MEM_SUPPORTED */ - -#ifdef PNG_SETJMP_SUPPORTED - volatile -#endif - png_structp png_ptr; - volatile int png_cleanup_needed = 0; - -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf tmp_jmpbuf; -#endif -#endif - - png_debug(1, "in png_create_read_struct"); - -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - malloc_fn, mem_ptr); -#else - png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); -#endif - if (png_ptr == NULL) - return (NULL); - - /* Added at libpng-1.2.6 */ -#ifdef PNG_USER_LIMITS_SUPPORTED - png_ptr->user_width_max = PNG_USER_WIDTH_MAX; - png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; - - /* Added at libpng-1.2.43 and 1.4.0 */ - png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; - - /* Added at libpng-1.2.43 and 1.4.1 */ - png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; -#endif - -#ifdef PNG_SETJMP_SUPPORTED -/* Applications that neglect to set up their own setjmp() and then - * encounter a png_error() will longjmp here. Since the jmpbuf is - * then meaningless we abort instead of returning. - */ -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) -#else - if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */ -#endif - PNG_ABORT(); -#ifdef USE_FAR_KEYWORD - png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); -#endif -#endif /* PNG_SETJMP_SUPPORTED */ - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif + png_structp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, mem_ptr, malloc_fn, free_fn); +#endif /* USER_MEM */ - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - /* Call the general version checker (shared with read and write code): */ - if (!png_user_version_check(png_ptr, user_png_ver)) - png_cleanup_needed = 1; - - if (png_cleanup_needed == 0) + if (png_ptr != NULL) { - /* Initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size); - - if (png_ptr->zbuf == NULL) - png_cleanup_needed = 1; - } - - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; + png_ptr->mode = PNG_IS_READ_STRUCT; - if (png_cleanup_needed == 0) - { - switch (inflateInit(&png_ptr->zstream)) - { - case Z_OK: - break; /* Do nothing */ - - case Z_MEM_ERROR: - png_warning(png_ptr, "zlib memory error"); - png_cleanup_needed = 1; - break; - - case Z_STREAM_ERROR: - png_warning(png_ptr, "zlib stream error"); - png_cleanup_needed = 1; - break; - - case Z_VERSION_ERROR: - png_warning(png_ptr, "zlib version error"); - png_cleanup_needed = 1; - break; + /* Added in libpng-1.6.0; this can be used to detect a read structure if + * required (it will be zero in a write structure.) + */ +# ifdef PNG_SEQUENTIAL_READ_SUPPORTED + png_ptr->IDAT_read_size = PNG_IDAT_READ_SIZE; +# endif - default: png_warning(png_ptr, "Unknown zlib error"); - png_cleanup_needed = 1; - } - } +# ifdef PNG_BENIGN_READ_ERRORS_SUPPORTED + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; - if (png_cleanup_needed != 0) - { - /* Clean up PNG structure and deallocate any memory. */ - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - return (NULL); + /* In stable builds only warn if an application error can be completely + * handled. + */ +# if PNG_RELEASE_BUILD + png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN; +# endif +# endif + + /* TODO: delay this, it can be done in png_init_io (if the app doesn't + * do it itself) avoiding setting the default function if it is not + * required. + */ + png_set_read_fn(png_ptr, NULL, NULL); } - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - png_set_read_fn(png_ptr, NULL, NULL); - - - return (png_ptr); + return png_ptr; } @@ -175,8 +89,12 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, * read if it is determined that this isn't a valid PNG file. */ void PNGAPI -png_read_info(png_structp png_ptr, png_infop info_ptr) +png_read_info(png_structrp png_ptr, png_inforp info_ptr) { +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + int keep; +#endif + png_debug(1, "in png_read_info"); if (png_ptr == NULL || info_ptr == NULL) @@ -190,13 +108,33 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) png_uint_32 length = png_read_chunk_header(png_ptr); png_uint_32 chunk_name = png_ptr->chunk_name; - /* This should be a binary subdivision search or a hash for - * matching the chunk name rather than a linear search. + /* IDAT logic needs to happen here to simplify getting the two flags + * right. */ if (chunk_name == png_IDAT) - if (png_ptr->mode & PNG_AFTER_IDAT) - png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + { + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "Missing IHDR before IDAT"); + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + (png_ptr->mode & PNG_HAVE_PLTE) == 0) + png_chunk_error(png_ptr, "Missing PLTE before IDAT"); + + else if ((png_ptr->mode & PNG_AFTER_IDAT) != 0) + png_chunk_benign_error(png_ptr, "Too many IDATs found"); + + png_ptr->mode |= PNG_HAVE_IDAT; + } + + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) + { + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + png_ptr->mode |= PNG_AFTER_IDAT; + } + /* This should be a binary subdivision search or a hash for + * matching the chunk name rather than a linear search. + */ if (chunk_name == png_IHDR) png_handle_IHDR(png_ptr, info_ptr, length); @@ -204,26 +142,16 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) png_handle_IEND(png_ptr, info_ptr, length); #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_chunk_unknown_handling(png_ptr, chunk_name) != - PNG_HANDLE_CHUNK_AS_DEFAULT) + else if ((keep = png_chunk_unknown_handling(png_ptr, chunk_name)) != 0) { - if (chunk_name == png_IDAT) - png_ptr->mode |= PNG_HAVE_IDAT; - - png_handle_unknown(png_ptr, info_ptr, length); + png_handle_unknown(png_ptr, info_ptr, length, keep); if (chunk_name == png_PLTE) png_ptr->mode |= PNG_HAVE_PLTE; else if (chunk_name == png_IDAT) { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - + png_ptr->idat_size = 0; /* It has been consumed */ break; } } @@ -233,15 +161,7 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) else if (chunk_name == png_IDAT) { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - png_ptr->idat_size = length; - png_ptr->mode |= PNG_HAVE_IDAT; break; } @@ -331,27 +251,36 @@ png_read_info(png_structp png_ptr, png_infop info_ptr) #endif else - png_handle_unknown(png_ptr, info_ptr, length); + png_handle_unknown(png_ptr, info_ptr, length, + PNG_HANDLE_CHUNK_AS_DEFAULT); } } -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ +#endif /* SEQUENTIAL_READ */ /* Optional call to update the users info_ptr structure */ void PNGAPI -png_read_update_info(png_structp png_ptr, png_infop info_ptr) +png_read_update_info(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_read_update_info"); - if (png_ptr == NULL) - return; + if (png_ptr != NULL) + { + if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0) + { + png_read_start_row(png_ptr); - png_read_start_row(png_ptr); +# ifdef PNG_READ_TRANSFORMS_SUPPORTED + png_read_transform_info(png_ptr, info_ptr); +# else + PNG_UNUSED(info_ptr) +# endif + } -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - png_read_transform_info(png_ptr, info_ptr); -#else - PNG_UNUSED(info_ptr) -#endif + /* New in 1.6.0 this avoids the bug of doing the initializations twice */ + else + png_app_error(png_ptr, + "png_read_update_info/png_start_read_image: duplicate call"); + } } #ifdef PNG_SEQUENTIAL_READ_SUPPORTED @@ -361,21 +290,93 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr) * If the user doesn't call this, we will do it ourselves. */ void PNGAPI -png_start_read_image(png_structp png_ptr) +png_start_read_image(png_structrp png_ptr) { png_debug(1, "in png_start_read_image"); if (png_ptr != NULL) - png_read_start_row(png_ptr); + { + if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0) + png_read_start_row(png_ptr); + + /* New in 1.6.0 this avoids the bug of doing the initializations twice */ + else + png_app_error(png_ptr, + "png_start_read_image/png_read_update_info: duplicate call"); + } } -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ +#endif /* SEQUENTIAL_READ */ #ifdef PNG_SEQUENTIAL_READ_SUPPORTED -void PNGAPI -png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) +#ifdef PNG_MNG_FEATURES_SUPPORTED +/* Undoes intrapixel differencing, + * NOTE: this is apparently only supported in the 'sequential' reader. + */ +static void +png_do_read_intrapixel(png_row_infop row_info, png_bytep row) { - int ret; + png_debug(1, "in png_do_read_intrapixel"); + if ( + (row_info->color_type & PNG_COLOR_MASK_COLOR) != 0) + { + int bytes_per_pixel; + png_uint_32 row_width = row_info->width; + + if (row_info->bit_depth == 8) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 3; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 4; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff); + *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff); + } + } + else if (row_info->bit_depth == 16) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 6; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 8; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); + png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); + png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); + png_uint_32 red = (s0 + s1 + 65536) & 0xffff; + png_uint_32 blue = (s2 + s1 + 65536) & 0xffff; + *(rp ) = (png_byte)((red >> 8) & 0xff); + *(rp + 1) = (png_byte)(red & 0xff); + *(rp + 4) = (png_byte)((blue >> 8) & 0xff); + *(rp + 5) = (png_byte)(blue & 0xff); + } + } + } +} +#endif /* MNG_FEATURES */ + +void PNGAPI +png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row) +{ png_row_info row_info; if (png_ptr == NULL) @@ -387,7 +388,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) /* png_read_start_row sets the information (in particular iwidth) for this * interlace pass. */ - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) + if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0) png_read_start_row(png_ptr); /* 1.5.6: row_info moved out of png_struct to a local here. */ @@ -398,45 +399,47 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) row_info.pixel_depth = png_ptr->pixel_depth; row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); +#ifdef PNG_WARNINGS_SUPPORTED if (png_ptr->row_number == 0 && png_ptr->pass == 0) { /* Check for transforms that have been set but were defined out */ #if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) + if ((png_ptr->transformations & PNG_INVERT_MONO) != 0) png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) + if ((png_ptr->transformations & PNG_FILLER) != 0) png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \ !defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) + if ((png_ptr->transformations & PNG_PACKSWAP) != 0) png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) + if ((png_ptr->transformations & PNG_PACK) != 0) png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) + if ((png_ptr->transformations & PNG_SHIFT) != 0) png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) + if ((png_ptr->transformations & PNG_BGR) != 0) png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined"); #endif #if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) + if ((png_ptr->transformations & PNG_SWAP_BYTES) != 0) png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined"); #endif } +#endif /* WARNINGS */ #ifdef PNG_READ_INTERLACING_SUPPORTED /* If interlaced and we do not need a new row, combine row and return. @@ -445,7 +448,8 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) * untransformed) and, because of the libpng API for interlaced images, this * means we must transform before de-interlacing. */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) + if (png_ptr->interlaced != 0 && + (png_ptr->transformations & PNG_INTERLACE) != 0) { switch (png_ptr->pass) { @@ -502,6 +506,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) return; } break; + case 5: if ((png_ptr->row_number & 1) || png_ptr->width < 2) { @@ -515,7 +520,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) default: case 6: - if (!(png_ptr->row_number & 1)) + if ((png_ptr->row_number & 1) == 0) { png_read_finish_row(png_ptr); return; @@ -525,52 +530,11 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) } #endif - if (!(png_ptr->mode & PNG_HAVE_IDAT)) + if ((png_ptr->mode & PNG_HAVE_IDAT) == 0) png_error(png_ptr, "Invalid attempt to read row data"); - png_ptr->zstream.next_out = png_ptr->row_buf; - png_ptr->zstream.avail_out = - (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth, - png_ptr->iwidth) + 1); - - do - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_crc_finish(png_ptr, 0); - - png_ptr->idat_size = png_read_chunk_header(png_ptr); - if (png_ptr->chunk_name != png_IDAT) - png_error(png_ptr, "Not enough image data"); - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - png_crc_read(png_ptr, png_ptr->zbuf, - (png_size_t)png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - - if (ret == Z_STREAM_END) - { - if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_benign_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression error"); - - } while (png_ptr->zstream.avail_out); + /* Fill the row with IDAT data: */ + png_read_IDAT_data(png_ptr, png_ptr->row_buf, row_info.rowbytes + 1); if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE) { @@ -586,10 +550,10 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) * it may not be in the future, so this was changed just to copy the * interlaced count: */ - png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); + memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); #ifdef PNG_MNG_FEATURES_SUPPORTED - if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && + if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 && (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) { /* Intrapixel differencing */ @@ -597,7 +561,6 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) } #endif - #ifdef PNG_READ_TRANSFORMS_SUPPORTED if (png_ptr->transformations) png_do_read_transformations(png_ptr, &row_info); @@ -615,9 +578,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) png_error(png_ptr, "internal sequential row size calculation error"); #ifdef PNG_READ_INTERLACING_SUPPORTED - /* Blow up interlaced rows to full size */ - if (png_ptr->interlaced && - (png_ptr->transformations & PNG_INTERLACE)) + /* Expand interlaced rows to full size */ + if (png_ptr->interlaced != 0 && + (png_ptr->transformations & PNG_INTERLACE) != 0) { if (png_ptr->pass < 6) png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, @@ -643,8 +606,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) if (png_ptr->read_row_fn != NULL) (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); + } -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ +#endif /* SEQUENTIAL_READ */ #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read one or more rows of image data. If the image is interlaced, @@ -672,7 +636,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) */ void PNGAPI -png_read_rows(png_structp png_ptr, png_bytepp row, +png_read_rows(png_structrp png_ptr, png_bytepp row, png_bytepp display_row, png_uint_32 num_rows) { png_uint_32 i; @@ -711,7 +675,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row, dp++; } } -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ +#endif /* SEQUENTIAL_READ */ #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the entire image. If the image has an alpha channel or a tRNS @@ -727,7 +691,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row, * [*] png_handle_alpha() does not exist yet, as of this version of libpng */ void PNGAPI -png_read_image(png_structp png_ptr, png_bytepp image) +png_read_image(png_structrp png_ptr, png_bytepp image) { png_uint_32 i, image_height; int pass, j; @@ -739,7 +703,7 @@ png_read_image(png_structp png_ptr, png_bytepp image) return; #ifdef PNG_READ_INTERLACING_SUPPORTED - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) + if ((png_ptr->flags & PNG_FLAG_ROW_INIT) == 0) { pass = png_set_interlace_handling(png_ptr); /* And make sure transforms are initialized. */ @@ -747,7 +711,8 @@ png_read_image(png_structp png_ptr, png_bytepp image) } else { - if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE)) + if (png_ptr->interlaced != 0 && + (png_ptr->transformations & PNG_INTERLACE) == 0) { /* Caller called png_start_read_image or png_read_update_info without * first turning on the PNG_INTERLACE transform. We can fix this here, @@ -784,7 +749,7 @@ png_read_image(png_structp png_ptr, png_bytepp image) } } } -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ +#endif /* SEQUENTIAL_READ */ #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the end of the PNG file. Will not read past the end of the @@ -792,14 +757,24 @@ png_read_image(png_structp png_ptr, png_bytepp image) * or time information at the end of the file, if info is not NULL. */ void PNGAPI -png_read_end(png_structp png_ptr, png_infop info_ptr) +png_read_end(png_structrp png_ptr, png_inforp info_ptr) { +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + int keep; +#endif + png_debug(1, "in png_read_end"); if (png_ptr == NULL) return; - png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ + /* If png_read_end is called in the middle of reading the rows there may + * still be pending IDAT data and an owned zstream. Deal with this here. + */ +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + if (png_chunk_unknown_handling(png_ptr, png_IDAT) == 0) +#endif + png_read_finish_IDAT(png_ptr); #ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED /* Report invalid palette index; added at libng-1.5.10 */ @@ -813,22 +788,28 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) png_uint_32 length = png_read_chunk_header(png_ptr); png_uint_32 chunk_name = png_ptr->chunk_name; - if (chunk_name == png_IHDR) - png_handle_IHDR(png_ptr, info_ptr, length); + if (chunk_name != png_IDAT) + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; - else if (chunk_name == png_IEND) + if (chunk_name == png_IEND) png_handle_IEND(png_ptr, info_ptr, length); + else if (chunk_name == png_IHDR) + png_handle_IHDR(png_ptr, info_ptr, length); + + else if (info_ptr == NULL) + png_crc_finish(png_ptr, length); + #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - else if (png_chunk_unknown_handling(png_ptr, chunk_name) != - PNG_HANDLE_CHUNK_AS_DEFAULT) + else if ((keep = png_chunk_unknown_handling(png_ptr, chunk_name)) != 0) { if (chunk_name == png_IDAT) { - if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) - png_benign_error(png_ptr, "Too many IDATs found"); + if ((length > 0 && !(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)) + || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0) + png_benign_error(png_ptr, ".Too many IDATs found"); } - png_handle_unknown(png_ptr, info_ptr, length); + png_handle_unknown(png_ptr, info_ptr, length, keep); if (chunk_name == png_PLTE) png_ptr->mode |= PNG_HAVE_PLTE; } @@ -837,10 +818,14 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) else if (chunk_name == png_IDAT) { /* Zero length IDATs are legal after the last IDAT has been - * read, but not after other chunks have been read. + * read, but not after other chunks have been read. 1.6 does not + * always read all the deflate data; specifically it cannot be relied + * upon to read the Adler32 at the end. If it doesn't ignore IDAT + * chunks which are longer than zero as well: */ - if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) - png_benign_error(png_ptr, "Too many IDATs found"); + if ((length > 0 && !(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)) + || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0) + png_benign_error(png_ptr, "..Too many IDATs found"); png_crc_finish(png_ptr, length); } @@ -933,181 +918,106 @@ png_read_end(png_structp png_ptr, png_infop info_ptr) #endif else - png_handle_unknown(png_ptr, info_ptr, length); - } while (!(png_ptr->mode & PNG_HAVE_IEND)); -} -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -/* Free all memory used by the read */ -void PNGAPI -png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, - png_infopp end_info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL, end_info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; - png_voidp mem_ptr = NULL; -#endif - - png_debug(1, "in png_destroy_read_struct"); - - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - if (png_ptr == NULL) - return; - -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; - mem_ptr = png_ptr->mem_ptr; -#endif - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (end_info_ptr_ptr != NULL) - end_info_ptr = *end_info_ptr_ptr; - - png_read_destroy(png_ptr, info_ptr, end_info_ptr); - - if (info_ptr != NULL) - { -#ifdef PNG_TEXT_SUPPORTED - png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = NULL; - } - - if (end_info_ptr != NULL) - { -#ifdef PNG_READ_TEXT_SUPPORTED - png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1); -#endif -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)end_info_ptr); -#endif - *end_info_ptr_ptr = NULL; - } - - if (png_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = NULL; - } + png_handle_unknown(png_ptr, info_ptr, length, + PNG_HANDLE_CHUNK_AS_DEFAULT); + } while ((png_ptr->mode & PNG_HAVE_IEND) == 0); } +#endif /* SEQUENTIAL_READ */ -/* Free all memory used by the read (old method) */ -void /* PRIVATE */ -png_read_destroy(png_structp png_ptr, png_infop info_ptr, - png_infop end_info_ptr) +/* Free all memory used in the read struct */ +static void +png_read_destroy(png_structrp png_ptr) { -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; -#endif - png_error_ptr error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_error_ptr warning_fn; -#endif - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - png_debug(1, "in png_read_destroy"); - if (info_ptr != NULL) - png_info_destroy(png_ptr, info_ptr); - - if (end_info_ptr != NULL) - png_info_destroy(png_ptr, end_info_ptr); - #ifdef PNG_READ_GAMMA_SUPPORTED png_destroy_gamma_table(png_ptr); #endif - png_free(png_ptr, png_ptr->zbuf); png_free(png_ptr, png_ptr->big_row_buf); + png_ptr->big_row_buf = NULL; png_free(png_ptr, png_ptr->big_prev_row); - png_free(png_ptr, png_ptr->chunkdata); + png_ptr->big_prev_row = NULL; + png_free(png_ptr, png_ptr->read_buffer); + png_ptr->read_buffer = NULL; #ifdef PNG_READ_QUANTIZE_SUPPORTED png_free(png_ptr, png_ptr->palette_lookup); + png_ptr->palette_lookup = NULL; png_free(png_ptr, png_ptr->quantize_index); + png_ptr->quantize_index = NULL; #endif - if (png_ptr->free_me & PNG_FREE_PLTE) + if ((png_ptr->free_me & PNG_FREE_PLTE) != 0) + { png_zfree(png_ptr, png_ptr->palette); + png_ptr->palette = NULL; + } png_ptr->free_me &= ~PNG_FREE_PLTE; #if defined(PNG_tRNS_SUPPORTED) || \ defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->free_me & PNG_FREE_TRNS) + if ((png_ptr->free_me & PNG_FREE_TRNS) != 0) + { png_free(png_ptr, png_ptr->trans_alpha); + png_ptr->trans_alpha = NULL; + } png_ptr->free_me &= ~PNG_FREE_TRNS; #endif -#ifdef PNG_READ_hIST_SUPPORTED - if (png_ptr->free_me & PNG_FREE_HIST) - png_free(png_ptr, png_ptr->hist); - png_ptr->free_me &= ~PNG_FREE_HIST; -#endif - inflateEnd(&png_ptr->zstream); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED png_free(png_ptr, png_ptr->save_buffer); + png_ptr->save_buffer = NULL; #endif - /* Save the important info out of the png_struct, in case it is - * being used again. - */ -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); +#if defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) && \ + defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; #endif - error_fn = png_ptr->error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - warning_fn = png_ptr->warning_fn; -#endif - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED + png_free(png_ptr, png_ptr->chunk_list); + png_ptr->chunk_list = NULL; #endif - png_memset(png_ptr, 0, png_sizeof(png_struct)); + /* NOTE: the 'setjmp' buffer may still be allocated and the memory and error + * callbacks are still set at this point. They are required to complete the + * destruction of the png_struct itself. + */ +} - png_ptr->error_fn = error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_ptr->warning_fn = warning_fn; -#endif - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif +/* Free all memory used by the read */ +void PNGAPI +png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, + png_infopp end_info_ptr_ptr) +{ + png_structrp png_ptr = NULL; -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); -#endif + png_debug(1, "in png_destroy_read_struct"); + + if (png_ptr_ptr != NULL) + png_ptr = *png_ptr_ptr; + + if (png_ptr == NULL) + return; + /* libpng 1.6.0: use the API to destroy info structs to ensure consistent + * behavior. Prior to 1.6.0 libpng did extra 'info' destruction in this API. + * The extra was, apparently, unnecessary yet this hides memory leak bugs. + */ + png_destroy_info_struct(png_ptr, end_info_ptr_ptr); + png_destroy_info_struct(png_ptr, info_ptr_ptr); + + *png_ptr_ptr = NULL; + png_read_destroy(png_ptr); + png_destroy_png_struct(png_ptr); } void PNGAPI -png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) +png_set_read_status_fn(png_structrp png_ptr, png_read_status_ptr read_row_fn) { if (png_ptr == NULL) return; @@ -1119,11 +1029,10 @@ png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) #ifdef PNG_SEQUENTIAL_READ_SUPPORTED #ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI -png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms, - voidp params) +png_read_png(png_structrp png_ptr, png_inforp info_ptr, + int transforms, + voidp params) { - int row; - if (png_ptr == NULL || info_ptr == NULL) return; @@ -1131,124 +1040,153 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms, * PNG file before the first IDAT (image data chunk). */ png_read_info(png_ptr, info_ptr); - if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep)) + if (info_ptr->height > PNG_UINT_32_MAX/(sizeof (png_bytep))) png_error(png_ptr, "Image is too high to process with png_read_png()"); /* -------------- image transformations start here ------------------- */ + /* libpng 1.6.10: add code to cause a png_app_error if a selected TRANSFORM + * is not implemented. This will only happen in de-configured (non-default) + * libpng builds. The results can be unexpected - png_read_png may return + * short or mal-formed rows because the transform is skipped. + */ -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* Tell libpng to strip 16-bit/color files down to 8 bits per color. */ - if (transforms & PNG_TRANSFORM_SCALE_16) - { - /* Added at libpng-1.5.4. "strip_16" produces the same result that it - * did in earlier versions, while "scale_16" is now more accurate. - */ + if ((transforms & PNG_TRANSFORM_SCALE_16) != 0) + /* Added at libpng-1.5.4. "strip_16" produces the same result that it + * did in earlier versions, while "scale_16" is now more accurate. + */ +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED png_set_scale_16(png_ptr); - } +#else + png_app_error(png_ptr, "PNG_TRANSFORM_SCALE_16 not supported"); #endif -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED /* If both SCALE and STRIP are required pngrtran will effectively cancel the * latter by doing SCALE first. This is ok and allows apps not to check for * which is supported to get the right answer. */ - if (transforms & PNG_TRANSFORM_STRIP_16) + if ((transforms & PNG_TRANSFORM_STRIP_16) != 0) +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED png_set_strip_16(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_STRIP_16 not supported"); #endif -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED /* Strip alpha bytes from the input data without combining with * the background (not recommended). */ - if (transforms & PNG_TRANSFORM_STRIP_ALPHA) + if ((transforms & PNG_TRANSFORM_STRIP_ALPHA) != 0) +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED png_set_strip_alpha(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_STRIP_ALPHA not supported"); #endif -#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED) /* Extract multiple pixels with bit depths of 1, 2, or 4 from a single * byte into separate bytes (useful for paletted and grayscale images). */ - if (transforms & PNG_TRANSFORM_PACKING) + if ((transforms & PNG_TRANSFORM_PACKING) != 0) +#ifdef PNG_READ_PACK_SUPPORTED png_set_packing(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_PACKING not supported"); #endif -#ifdef PNG_READ_PACKSWAP_SUPPORTED /* Change the order of packed pixels to least significant bit first * (not useful if you are using png_set_packing). */ - if (transforms & PNG_TRANSFORM_PACKSWAP) + if ((transforms & PNG_TRANSFORM_PACKSWAP) != 0) +#ifdef PNG_READ_PACKSWAP_SUPPORTED png_set_packswap(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_PACKSWAP not supported"); #endif -#ifdef PNG_READ_EXPAND_SUPPORTED /* Expand paletted colors into true RGB triplets * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel * Expand paletted or RGB images with transparency to full alpha * channels so the data will be available as RGBA quartets. */ - if (transforms & PNG_TRANSFORM_EXPAND) - if ((png_ptr->bit_depth < 8) || - (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) || - (info_ptr->valid & PNG_INFO_tRNS)) - png_set_expand(png_ptr); + if ((transforms & PNG_TRANSFORM_EXPAND) != 0) +#ifdef PNG_READ_EXPAND_SUPPORTED + png_set_expand(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_EXPAND not supported"); #endif /* We don't handle background color or gamma transformation or quantizing. */ -#ifdef PNG_READ_INVERT_SUPPORTED /* Invert monochrome files to have 0 as white and 1 as black */ - if (transforms & PNG_TRANSFORM_INVERT_MONO) + if ((transforms & PNG_TRANSFORM_INVERT_MONO) != 0) +#ifdef PNG_READ_INVERT_SUPPORTED png_set_invert_mono(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_INVERT_MONO not supported"); #endif -#ifdef PNG_READ_SHIFT_SUPPORTED /* If you want to shift the pixel values from the range [0,255] or * [0,65535] to the original [0,7] or [0,31], or whatever range the * colors were originally in: */ - if ((transforms & PNG_TRANSFORM_SHIFT) && (info_ptr->valid & PNG_INFO_sBIT)) - png_set_shift(png_ptr, &info_ptr->sig_bit); + if ((transforms & PNG_TRANSFORM_SHIFT) != 0) +#ifdef PNG_READ_SHIFT_SUPPORTED + if ((info_ptr->valid & PNG_INFO_sBIT) != 0) + png_set_shift(png_ptr, &info_ptr->sig_bit); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_SHIFT not supported"); #endif -#ifdef PNG_READ_BGR_SUPPORTED /* Flip the RGB pixels to BGR (or RGBA to BGRA) */ - if (transforms & PNG_TRANSFORM_BGR) + if ((transforms & PNG_TRANSFORM_BGR) != 0) +#ifdef PNG_READ_BGR_SUPPORTED png_set_bgr(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_BGR not supported"); #endif -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */ - if (transforms & PNG_TRANSFORM_SWAP_ALPHA) + if ((transforms & PNG_TRANSFORM_SWAP_ALPHA) != 0) +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED png_set_swap_alpha(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_SWAP_ALPHA not supported"); #endif -#ifdef PNG_READ_SWAP_SUPPORTED /* Swap bytes of 16-bit files to least significant byte first */ - if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) + if ((transforms & PNG_TRANSFORM_SWAP_ENDIAN) != 0) +#ifdef PNG_READ_SWAP_SUPPORTED png_set_swap(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_SWAP_ENDIAN not supported"); #endif /* Added at libpng-1.2.41 */ -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED /* Invert the alpha channel from opacity to transparency */ - if (transforms & PNG_TRANSFORM_INVERT_ALPHA) + if ((transforms & PNG_TRANSFORM_INVERT_ALPHA) != 0) +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED png_set_invert_alpha(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_INVERT_ALPHA not supported"); #endif /* Added at libpng-1.2.41 */ -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand grayscale image to RGB */ - if (transforms & PNG_TRANSFORM_GRAY_TO_RGB) + if ((transforms & PNG_TRANSFORM_GRAY_TO_RGB) != 0) +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED png_set_gray_to_rgb(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_GRAY_TO_RGB not supported"); #endif /* Added at libpng-1.5.4 */ + if ((transforms & PNG_TRANSFORM_EXPAND_16) != 0) #ifdef PNG_READ_EXPAND_16_SUPPORTED - if (transforms & PNG_TRANSFORM_EXPAND_16) png_set_expand_16(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_EXPAND_16 not supported"); #endif /* We don't handle adding filler bytes */ @@ -1271,16 +1209,17 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms, { png_uint_32 iptr; - info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr, - info_ptr->height * png_sizeof(png_bytep)); + info_ptr->row_pointers = png_voidcast(png_bytepp, png_malloc(png_ptr, + info_ptr->height * (sizeof (png_bytep)))); + for (iptr=0; iptr<info_ptr->height; iptr++) info_ptr->row_pointers[iptr] = NULL; info_ptr->free_me |= PNG_FREE_ROWS; - for (row = 0; row < (int)info_ptr->height; row++) - info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr, - png_get_rowbytes(png_ptr, info_ptr)); + for (iptr = 0; iptr < info_ptr->height; iptr++) + info_ptr->row_pointers[iptr] = png_voidcast(png_bytep, + png_malloc(png_ptr, info_ptr->rowbytes)); } png_read_image(png_ptr, info_ptr->row_pointers); @@ -1289,10 +1228,2945 @@ png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms, /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */ png_read_end(png_ptr, info_ptr); - PNG_UNUSED(transforms) /* Quiet compiler warnings */ PNG_UNUSED(params) +} +#endif /* INFO_IMAGE */ +#endif /* SEQUENTIAL_READ */ + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +/* SIMPLIFIED READ + * + * This code currently relies on the sequential reader, though it could easily + * be made to work with the progressive one. + */ +/* Arguments to png_image_finish_read: */ + +/* Encoding of PNG data (used by the color-map code) */ +# define P_NOTSET 0 /* File encoding not yet known */ +# define P_sRGB 1 /* 8-bit encoded to sRGB gamma */ +# define P_LINEAR 2 /* 16-bit linear: not encoded, NOT pre-multiplied! */ +# define P_FILE 3 /* 8-bit encoded to file gamma, not sRGB or linear */ +# define P_LINEAR8 4 /* 8-bit linear: only from a file value */ + +/* Color-map processing: after libpng has run on the PNG image further + * processing may be needed to convert the data to color-map indices. + */ +#define PNG_CMAP_NONE 0 +#define PNG_CMAP_GA 1 /* Process GA data to a color-map with alpha */ +#define PNG_CMAP_TRANS 2 /* Process GA data to a background index */ +#define PNG_CMAP_RGB 3 /* Process RGB data */ +#define PNG_CMAP_RGB_ALPHA 4 /* Process RGBA data */ + +/* The following document where the background is for each processing case. */ +#define PNG_CMAP_NONE_BACKGROUND 256 +#define PNG_CMAP_GA_BACKGROUND 231 +#define PNG_CMAP_TRANS_BACKGROUND 254 +#define PNG_CMAP_RGB_BACKGROUND 256 +#define PNG_CMAP_RGB_ALPHA_BACKGROUND 216 + +typedef struct +{ + /* Arguments: */ + png_imagep image; + png_voidp buffer; + png_int_32 row_stride; + png_voidp colormap; + png_const_colorp background; + /* Local variables: */ + png_voidp local_row; + png_voidp first_row; + ptrdiff_t row_bytes; /* step between rows */ + int file_encoding; /* E_ values above */ + png_fixed_point gamma_to_linear; /* For P_FILE, reciprocal of gamma */ + int colormap_processing; /* PNG_CMAP_ values above */ +} png_image_read_control; + +/* Do all the *safe* initialization - 'safe' means that png_error won't be + * called, so setting up the jmp_buf is not required. This means that anything + * called from here must *not* call png_malloc - it has to call png_malloc_warn + * instead so that control is returned safely back to this routine. + */ +static int +png_image_read_init(png_imagep image) +{ + if (image->opaque == NULL) + { + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, image, + png_safe_error, png_safe_warning); + + /* And set the rest of the structure to NULL to ensure that the various + * fields are consistent. + */ + memset(image, 0, (sizeof *image)); + image->version = PNG_IMAGE_VERSION; + + if (png_ptr != NULL) + { + png_infop info_ptr = png_create_info_struct(png_ptr); + + if (info_ptr != NULL) + { + png_controlp control = png_voidcast(png_controlp, + png_malloc_warn(png_ptr, (sizeof *control))); + + if (control != NULL) + { + memset(control, 0, (sizeof *control)); + + control->png_ptr = png_ptr; + control->info_ptr = info_ptr; + control->for_write = 0; + + image->opaque = control; + return 1; + } + + /* Error clean up */ + png_destroy_info_struct(png_ptr, &info_ptr); + } + + png_destroy_read_struct(&png_ptr, NULL, NULL); + } + + return png_image_error(image, "png_image_read: out of memory"); + } + + return png_image_error(image, "png_image_read: opaque pointer not NULL"); +} + +/* Utility to find the base format of a PNG file from a png_struct. */ +static png_uint_32 +png_image_format(png_structrp png_ptr) +{ + png_uint_32 format = 0; + + if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) + format |= PNG_FORMAT_FLAG_COLOR; + + if ((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0) + format |= PNG_FORMAT_FLAG_ALPHA; + + /* Use png_ptr here, not info_ptr, because by examination png_handle_tRNS + * sets the png_struct fields; that's all we are interested in here. The + * precise interaction with an app call to png_set_tRNS and PNG file reading + * is unclear. + */ + else if (png_ptr->num_trans > 0) + format |= PNG_FORMAT_FLAG_ALPHA; + + if (png_ptr->bit_depth == 16) + format |= PNG_FORMAT_FLAG_LINEAR; + + if ((png_ptr->color_type & PNG_COLOR_MASK_PALETTE) != 0) + format |= PNG_FORMAT_FLAG_COLORMAP; + + return format; +} + +/* Is the given gamma significantly different from sRGB? The test is the same + * one used in pngrtran.c when deciding whether to do gamma correction. The + * arithmetic optimizes the division by using the fact that the inverse of the + * file sRGB gamma is 2.2 + */ +static int +png_gamma_not_sRGB(png_fixed_point g) +{ + if (g < PNG_FP_1) + { + /* An uninitialized gamma is assumed to be sRGB for the simplified API. */ + if (g == 0) + return 0; + + return png_gamma_significant((g * 11 + 2)/5 /* i.e. *2.2, rounded */); + } + + return 1; +} + +/* Do the main body of a 'png_image_begin_read' function; read the PNG file + * header and fill in all the information. This is executed in a safe context, + * unlike the init routine above. + */ +static int +png_image_read_header(png_voidp argument) +{ + png_imagep image = png_voidcast(png_imagep, argument); + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + + png_set_benign_errors(png_ptr, 1/*warn*/); + png_read_info(png_ptr, info_ptr); + + /* Do this the fast way; just read directly out of png_struct. */ + image->width = png_ptr->width; + image->height = png_ptr->height; + + { + png_uint_32 format = png_image_format(png_ptr); + + image->format = format; + +#ifdef PNG_COLORSPACE_SUPPORTED + /* Does the colorspace match sRGB? If there is no color endpoint + * (colorant) information assume yes, otherwise require the + * 'ENDPOINTS_MATCHP_sRGB' colorspace flag to have been set. If the + * colorspace has been determined to be invalid ignore it. + */ + if ((format & PNG_FORMAT_FLAG_COLOR) != 0 && ((png_ptr->colorspace.flags + & (PNG_COLORSPACE_HAVE_ENDPOINTS|PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB| + PNG_COLORSPACE_INVALID)) == PNG_COLORSPACE_HAVE_ENDPOINTS)) + image->flags |= PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB; +#endif + } + + /* We need the maximum number of entries regardless of the format the + * application sets here. + */ + { + png_uint_32 cmap_entries; + + switch (png_ptr->color_type) + { + case PNG_COLOR_TYPE_GRAY: + cmap_entries = 1U << png_ptr->bit_depth; + break; + + case PNG_COLOR_TYPE_PALETTE: + cmap_entries = png_ptr->num_palette; + break; + + default: + cmap_entries = 256; + break; + } + + if (cmap_entries > 256) + cmap_entries = 256; + + image->colormap_entries = cmap_entries; + } + + return 1; +} + +#ifdef PNG_STDIO_SUPPORTED +int PNGAPI +png_image_begin_read_from_stdio(png_imagep image, FILE* file) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (file != NULL) + { + if (png_image_read_init(image) != 0) + { + /* This is slightly evil, but png_init_io doesn't do anything other + * than this and we haven't changed the standard IO functions so + * this saves a 'safe' function. + */ + image->opaque->png_ptr->io_ptr = file; + return png_safe_execute(image, png_image_read_header, image); + } + } + + else + return png_image_error(image, + "png_image_begin_read_from_stdio: invalid argument"); + } + + else if (image != NULL) + return png_image_error(image, + "png_image_begin_read_from_stdio: incorrect PNG_IMAGE_VERSION"); + + return 0; +} + +int PNGAPI +png_image_begin_read_from_file(png_imagep image, const char *file_name) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (file_name != NULL) + { + FILE *fp = fopen(file_name, "rb"); + + if (fp != NULL) + { + if (png_image_read_init(image) != 0) + { + image->opaque->png_ptr->io_ptr = fp; + image->opaque->owned_file = 1; + return png_safe_execute(image, png_image_read_header, image); + } + + /* Clean up: just the opened file. */ + (void)fclose(fp); + } + + else + return png_image_error(image, strerror(errno)); + } + + else + return png_image_error(image, + "png_image_begin_read_from_file: invalid argument"); + } + else if (image != NULL) + return png_image_error(image, + "png_image_begin_read_from_file: incorrect PNG_IMAGE_VERSION"); + + return 0; +} +#endif /* STDIO */ + +static void PNGCBAPI +png_image_memory_read(png_structp png_ptr, png_bytep out, png_size_t need) +{ + if (png_ptr != NULL) + { + png_imagep image = png_voidcast(png_imagep, png_ptr->io_ptr); + if (image != NULL) + { + png_controlp cp = image->opaque; + if (cp != NULL) + { + png_const_bytep memory = cp->memory; + png_size_t size = cp->size; + + if (memory != NULL && size >= need) + { + memcpy(out, memory, need); + cp->memory = memory + need; + cp->size = size - need; + return; + } + + png_error(png_ptr, "read beyond end of data"); + } + } + + png_error(png_ptr, "invalid memory read"); + } +} + +int PNGAPI png_image_begin_read_from_memory(png_imagep image, + png_const_voidp memory, png_size_t size) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (memory != NULL && size > 0) + { + if (png_image_read_init(image) != 0) + { + /* Now set the IO functions to read from the memory buffer and + * store it into io_ptr. Again do this in-place to avoid calling a + * libpng function that requires error handling. + */ + image->opaque->memory = png_voidcast(png_const_bytep, memory); + image->opaque->size = size; + image->opaque->png_ptr->io_ptr = image; + image->opaque->png_ptr->read_data_fn = png_image_memory_read; + + return png_safe_execute(image, png_image_read_header, image); + } + } + + else + return png_image_error(image, + "png_image_begin_read_from_memory: invalid argument"); + } + + else if (image != NULL) + return png_image_error(image, + "png_image_begin_read_from_memory: incorrect PNG_IMAGE_VERSION"); + + return 0; } -#endif /* PNG_INFO_IMAGE_SUPPORTED */ -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED */ + +/* Utility function to skip chunks that are not used by the simplified image + * read functions and an appropriate macro to call it. + */ +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +static void +png_image_skip_unused_chunks(png_structrp png_ptr) +{ + /* Prepare the reader to ignore all recognized chunks whose data will not + * be used, i.e., all chunks recognized by libpng except for those + * involved in basic image reading: + * + * IHDR, PLTE, IDAT, IEND + * + * Or image data handling: + * + * tRNS, bKGD, gAMA, cHRM, sRGB, [iCCP] and sBIT. + * + * This provides a small performance improvement and eliminates any + * potential vulnerability to security problems in the unused chunks. + * + * At present the iCCP chunk data isn't used, so iCCP chunk can be ignored + * too. This allows the simplified API to be compiled without iCCP support, + * however if the support is there the chunk is still checked to detect + * errors (which are unfortunately quite common.) + */ + { + static PNG_CONST png_byte chunks_to_process[] = { + 98, 75, 71, 68, '\0', /* bKGD */ + 99, 72, 82, 77, '\0', /* cHRM */ + 103, 65, 77, 65, '\0', /* gAMA */ +# ifdef PNG_READ_iCCP_SUPPORTED + 105, 67, 67, 80, '\0', /* iCCP */ +# endif + 115, 66, 73, 84, '\0', /* sBIT */ + 115, 82, 71, 66, '\0', /* sRGB */ + }; + + /* Ignore unknown chunks and all other chunks except for the + * IHDR, PLTE, tRNS, IDAT, and IEND chunks. + */ + png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_NEVER, + NULL, -1); + + /* But do not ignore image data handling chunks */ + png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_AS_DEFAULT, + chunks_to_process, (int)/*SAFE*/(sizeof chunks_to_process)/5); + } +} + +# define PNG_SKIP_CHUNKS(p) png_image_skip_unused_chunks(p) +#else +# define PNG_SKIP_CHUNKS(p) ((void)0) +#endif /* HANDLE_AS_UNKNOWN */ + +/* The following macro gives the exact rounded answer for all values in the + * range 0..255 (it actually divides by 51.2, but the rounding still generates + * the correct numbers 0..5 + */ +#define PNG_DIV51(v8) (((v8) * 5 + 130) >> 8) + +/* Utility functions to make particular color-maps */ +static void +set_file_encoding(png_image_read_control *display) +{ + png_fixed_point g = display->image->opaque->png_ptr->colorspace.gamma; + if (png_gamma_significant(g) != 0) + { + if (png_gamma_not_sRGB(g) != 0) + { + display->file_encoding = P_FILE; + display->gamma_to_linear = png_reciprocal(g); + } + + else + display->file_encoding = P_sRGB; + } + + else + display->file_encoding = P_LINEAR8; +} + +static unsigned int +decode_gamma(png_image_read_control *display, png_uint_32 value, int encoding) +{ + if (encoding == P_FILE) /* double check */ + encoding = display->file_encoding; + + if (encoding == P_NOTSET) /* must be the file encoding */ + { + set_file_encoding(display); + encoding = display->file_encoding; + } + + switch (encoding) + { + case P_FILE: + value = png_gamma_16bit_correct(value*257, display->gamma_to_linear); + break; + + case P_sRGB: + value = png_sRGB_table[value]; + break; + + case P_LINEAR: + break; + + case P_LINEAR8: + value *= 257; + break; + +#ifdef __GNUC__ + default: + png_error(display->image->opaque->png_ptr, + "unexpected encoding (internal error)"); +#endif + } + + return value; +} + +static png_uint_32 +png_colormap_compose(png_image_read_control *display, + png_uint_32 foreground, int foreground_encoding, png_uint_32 alpha, + png_uint_32 background, int encoding) +{ + /* The file value is composed on the background, the background has the given + * encoding and so does the result, the file is encoded with P_FILE and the + * file and alpha are 8-bit values. The (output) encoding will always be + * P_LINEAR or P_sRGB. + */ + png_uint_32 f = decode_gamma(display, foreground, foreground_encoding); + png_uint_32 b = decode_gamma(display, background, encoding); + + /* The alpha is always an 8-bit value (it comes from the palette), the value + * scaled by 255 is what PNG_sRGB_FROM_LINEAR requires. + */ + f = f * alpha + b * (255-alpha); + + if (encoding == P_LINEAR) + { + /* Scale to 65535; divide by 255, approximately (in fact this is extremely + * accurate, it divides by 255.00000005937181414556, with no overflow.) + */ + f *= 257; /* Now scaled by 65535 */ + f += f >> 16; + f = (f+32768) >> 16; + } + + else /* P_sRGB */ + f = PNG_sRGB_FROM_LINEAR(f); + + return f; +} + +/* NOTE: P_LINEAR values to this routine must be 16-bit, but P_FILE values must + * be 8-bit. + */ +static void +png_create_colormap_entry(png_image_read_control *display, + png_uint_32 ip, png_uint_32 red, png_uint_32 green, png_uint_32 blue, + png_uint_32 alpha, int encoding) +{ + png_imagep image = display->image; + const int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) != 0 ? + P_LINEAR : P_sRGB; + const int convert_to_Y = (image->format & PNG_FORMAT_FLAG_COLOR) == 0 && + (red != green || green != blue); + + if (ip > 255) + png_error(image->opaque->png_ptr, "color-map index out of range"); + + /* Update the cache with whether the file gamma is significantly different + * from sRGB. + */ + if (encoding == P_FILE) + { + if (display->file_encoding == P_NOTSET) + set_file_encoding(display); + + /* Note that the cached value may be P_FILE too, but if it is then the + * gamma_to_linear member has been set. + */ + encoding = display->file_encoding; + } + + if (encoding == P_FILE) + { + png_fixed_point g = display->gamma_to_linear; + + red = png_gamma_16bit_correct(red*257, g); + green = png_gamma_16bit_correct(green*257, g); + blue = png_gamma_16bit_correct(blue*257, g); + + if (convert_to_Y != 0 || output_encoding == P_LINEAR) + { + alpha *= 257; + encoding = P_LINEAR; + } + + else + { + red = PNG_sRGB_FROM_LINEAR(red * 255); + green = PNG_sRGB_FROM_LINEAR(green * 255); + blue = PNG_sRGB_FROM_LINEAR(blue * 255); + encoding = P_sRGB; + } + } + + else if (encoding == P_LINEAR8) + { + /* This encoding occurs quite frequently in test cases because PngSuite + * includes a gAMA 1.0 chunk with most images. + */ + red *= 257; + green *= 257; + blue *= 257; + alpha *= 257; + encoding = P_LINEAR; + } + + else if (encoding == P_sRGB && + (convert_to_Y != 0 || output_encoding == P_LINEAR)) + { + /* The values are 8-bit sRGB values, but must be converted to 16-bit + * linear. + */ + red = png_sRGB_table[red]; + green = png_sRGB_table[green]; + blue = png_sRGB_table[blue]; + alpha *= 257; + encoding = P_LINEAR; + } + + /* This is set if the color isn't gray but the output is. */ + if (encoding == P_LINEAR) + { + if (convert_to_Y != 0) + { + /* NOTE: these values are copied from png_do_rgb_to_gray */ + png_uint_32 y = (png_uint_32)6968 * red + (png_uint_32)23434 * green + + (png_uint_32)2366 * blue; + + if (output_encoding == P_LINEAR) + y = (y + 16384) >> 15; + + else + { + /* y is scaled by 32768, we need it scaled by 255: */ + y = (y + 128) >> 8; + y *= 255; + y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7); + alpha = PNG_DIV257(alpha); + encoding = P_sRGB; + } + + blue = red = green = y; + } + + else if (output_encoding == P_sRGB) + { + red = PNG_sRGB_FROM_LINEAR(red * 255); + green = PNG_sRGB_FROM_LINEAR(green * 255); + blue = PNG_sRGB_FROM_LINEAR(blue * 255); + alpha = PNG_DIV257(alpha); + encoding = P_sRGB; + } + } + + if (encoding != output_encoding) + png_error(image->opaque->png_ptr, "bad encoding (internal error)"); + + /* Store the value. */ + { +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + const int afirst = (image->format & PNG_FORMAT_FLAG_AFIRST) != 0 && + (image->format & PNG_FORMAT_FLAG_ALPHA) != 0; +# else +# define afirst 0 +# endif +# ifdef PNG_FORMAT_BGR_SUPPORTED + const int bgr = (image->format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0; +# else +# define bgr 0 +# endif + + if (output_encoding == P_LINEAR) + { + png_uint_16p entry = png_voidcast(png_uint_16p, display->colormap); + + entry += ip * PNG_IMAGE_SAMPLE_CHANNELS(image->format); + + /* The linear 16-bit values must be pre-multiplied by the alpha channel + * value, if less than 65535 (this is, effectively, composite on black + * if the alpha channel is removed.) + */ + switch (PNG_IMAGE_SAMPLE_CHANNELS(image->format)) + { + case 4: + entry[afirst ? 0 : 3] = (png_uint_16)alpha; + /* FALL THROUGH */ + + case 3: + if (alpha < 65535) + { + if (alpha > 0) + { + blue = (blue * alpha + 32767U)/65535U; + green = (green * alpha + 32767U)/65535U; + red = (red * alpha + 32767U)/65535U; + } + + else + red = green = blue = 0; + } + entry[afirst + (2 ^ bgr)] = (png_uint_16)blue; + entry[afirst + 1] = (png_uint_16)green; + entry[afirst + bgr] = (png_uint_16)red; + break; + + case 2: + entry[1 ^ afirst] = (png_uint_16)alpha; + /* FALL THROUGH */ + + case 1: + if (alpha < 65535) + { + if (alpha > 0) + green = (green * alpha + 32767U)/65535U; + + else + green = 0; + } + entry[afirst] = (png_uint_16)green; + break; + + default: + break; + } + } + + else /* output encoding is P_sRGB */ + { + png_bytep entry = png_voidcast(png_bytep, display->colormap); + + entry += ip * PNG_IMAGE_SAMPLE_CHANNELS(image->format); + + switch (PNG_IMAGE_SAMPLE_CHANNELS(image->format)) + { + case 4: + entry[afirst ? 0 : 3] = (png_byte)alpha; + case 3: + entry[afirst + (2 ^ bgr)] = (png_byte)blue; + entry[afirst + 1] = (png_byte)green; + entry[afirst + bgr] = (png_byte)red; + break; + + case 2: + entry[1 ^ afirst] = (png_byte)alpha; + case 1: + entry[afirst] = (png_byte)green; + break; + + default: + break; + } + } + +# ifdef afirst +# undef afirst +# endif +# ifdef bgr +# undef bgr +# endif + } +} + +static int +make_gray_file_colormap(png_image_read_control *display) +{ + unsigned int i; + + for (i=0; i<256; ++i) + png_create_colormap_entry(display, i, i, i, i, 255, P_FILE); + + return i; +} + +static int +make_gray_colormap(png_image_read_control *display) +{ + unsigned int i; + + for (i=0; i<256; ++i) + png_create_colormap_entry(display, i, i, i, i, 255, P_sRGB); + + return i; +} +#define PNG_GRAY_COLORMAP_ENTRIES 256 + +static int +make_ga_colormap(png_image_read_control *display) +{ + unsigned int i, a; + + /* Alpha is retained, the output will be a color-map with entries + * selected by six levels of alpha. One transparent entry, 6 gray + * levels for all the intermediate alpha values, leaving 230 entries + * for the opaque grays. The color-map entries are the six values + * [0..5]*51, the GA processing uses PNG_DIV51(value) to find the + * relevant entry. + * + * if (alpha > 229) // opaque + * { + * // The 231 entries are selected to make the math below work: + * base = 0; + * entry = (231 * gray + 128) >> 8; + * } + * else if (alpha < 26) // transparent + * { + * base = 231; + * entry = 0; + * } + * else // partially opaque + * { + * base = 226 + 6 * PNG_DIV51(alpha); + * entry = PNG_DIV51(gray); + * } + */ + i = 0; + while (i < 231) + { + unsigned int gray = (i * 256 + 115) / 231; + png_create_colormap_entry(display, i++, gray, gray, gray, 255, P_sRGB); + } + + /* 255 is used here for the component values for consistency with the code + * that undoes premultiplication in pngwrite.c. + */ + png_create_colormap_entry(display, i++, 255, 255, 255, 0, P_sRGB); + + for (a=1; a<5; ++a) + { + unsigned int g; + + for (g=0; g<6; ++g) + png_create_colormap_entry(display, i++, g*51, g*51, g*51, a*51, + P_sRGB); + } + + return i; +} + +#define PNG_GA_COLORMAP_ENTRIES 256 + +static int +make_rgb_colormap(png_image_read_control *display) +{ + unsigned int i, r; + + /* Build a 6x6x6 opaque RGB cube */ + for (i=r=0; r<6; ++r) + { + unsigned int g; + + for (g=0; g<6; ++g) + { + unsigned int b; + + for (b=0; b<6; ++b) + png_create_colormap_entry(display, i++, r*51, g*51, b*51, 255, + P_sRGB); + } + } + + return i; +} + +#define PNG_RGB_COLORMAP_ENTRIES 216 + +/* Return a palette index to the above palette given three 8-bit sRGB values. */ +#define PNG_RGB_INDEX(r,g,b) \ + ((png_byte)(6 * (6 * PNG_DIV51(r) + PNG_DIV51(g)) + PNG_DIV51(b))) + +static int +png_image_read_colormap(png_voidp argument) +{ + png_image_read_control *display = + png_voidcast(png_image_read_control*, argument); + const png_imagep image = display->image; + + const png_structrp png_ptr = image->opaque->png_ptr; + const png_uint_32 output_format = image->format; + const int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) != 0 ? + P_LINEAR : P_sRGB; + + unsigned int cmap_entries; + unsigned int output_processing; /* Output processing option */ + unsigned int data_encoding = P_NOTSET; /* Encoding libpng must produce */ + + /* Background information; the background color and the index of this color + * in the color-map if it exists (else 256). + */ + unsigned int background_index = 256; + png_uint_32 back_r, back_g, back_b; + + /* Flags to accumulate things that need to be done to the input. */ + int expand_tRNS = 0; + + /* Exclude the NYI feature of compositing onto a color-mapped buffer; it is + * very difficult to do, the results look awful, and it is difficult to see + * what possible use it is because the application can't control the + * color-map. + */ + if (((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0 || + png_ptr->num_trans > 0) /* alpha in input */ && + ((output_format & PNG_FORMAT_FLAG_ALPHA) == 0) /* no alpha in output */) + { + if (output_encoding == P_LINEAR) /* compose on black */ + back_b = back_g = back_r = 0; + + else if (display->background == NULL /* no way to remove it */) + png_error(png_ptr, + "a background color must be supplied to remove alpha/transparency"); + + /* Get a copy of the background color (this avoids repeating the checks + * below.) The encoding is 8-bit sRGB or 16-bit linear, depending on the + * output format. + */ + else + { + back_g = display->background->green; + if ((output_format & PNG_FORMAT_FLAG_COLOR) != 0) + { + back_r = display->background->red; + back_b = display->background->blue; + } + else + back_b = back_r = back_g; + } + } + + else if (output_encoding == P_LINEAR) + back_b = back_r = back_g = 65535; + + else + back_b = back_r = back_g = 255; + + /* Default the input file gamma if required - this is necessary because + * libpng assumes that if no gamma information is present the data is in the + * output format, but the simplified API deduces the gamma from the input + * format. + */ + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) == 0) + { + /* Do this directly, not using the png_colorspace functions, to ensure + * that it happens even if the colorspace is invalid (though probably if + * it is the setting will be ignored) Note that the same thing can be + * achieved at the application interface with png_set_gAMA. + */ + if (png_ptr->bit_depth == 16 && + (image->flags & PNG_IMAGE_FLAG_16BIT_sRGB) == 0) + png_ptr->colorspace.gamma = PNG_GAMMA_LINEAR; + + else + png_ptr->colorspace.gamma = PNG_GAMMA_sRGB_INVERSE; + + png_ptr->colorspace.flags |= PNG_COLORSPACE_HAVE_GAMMA; + } + + /* Decide what to do based on the PNG color type of the input data. The + * utility function png_create_colormap_entry deals with most aspects of the + * output transformations; this code works out how to produce bytes of + * color-map entries from the original format. + */ + switch (png_ptr->color_type) + { + case PNG_COLOR_TYPE_GRAY: + if (png_ptr->bit_depth <= 8) + { + /* There at most 256 colors in the output, regardless of + * transparency. + */ + unsigned int step, i, val, trans = 256/*ignore*/, back_alpha = 0; + + cmap_entries = 1U << png_ptr->bit_depth; + if (cmap_entries > image->colormap_entries) + png_error(png_ptr, "gray[8] color-map: too few entries"); + + step = 255 / (cmap_entries - 1); + output_processing = PNG_CMAP_NONE; + + /* If there is a tRNS chunk then this either selects a transparent + * value or, if the output has no alpha, the background color. + */ + if (png_ptr->num_trans > 0) + { + trans = png_ptr->trans_color.gray; + + if ((output_format & PNG_FORMAT_FLAG_ALPHA) == 0) + back_alpha = output_encoding == P_LINEAR ? 65535 : 255; + } + + /* png_create_colormap_entry just takes an RGBA and writes the + * corresponding color-map entry using the format from 'image', + * including the required conversion to sRGB or linear as + * appropriate. The input values are always either sRGB (if the + * gamma correction flag is 0) or 0..255 scaled file encoded values + * (if the function must gamma correct them). + */ + for (i=val=0; i<cmap_entries; ++i, val += step) + { + /* 'i' is a file value. While this will result in duplicated + * entries for 8-bit non-sRGB encoded files it is necessary to + * have non-gamma corrected values to do tRNS handling. + */ + if (i != trans) + png_create_colormap_entry(display, i, val, val, val, 255, + P_FILE/*8-bit with file gamma*/); + + /* Else this entry is transparent. The colors don't matter if + * there is an alpha channel (back_alpha == 0), but it does no + * harm to pass them in; the values are not set above so this + * passes in white. + * + * NOTE: this preserves the full precision of the application + * supplied background color when it is used. + */ + else + png_create_colormap_entry(display, i, back_r, back_g, back_b, + back_alpha, output_encoding); + } + + /* We need libpng to preserve the original encoding. */ + data_encoding = P_FILE; + + /* The rows from libpng, while technically gray values, are now also + * color-map indices; however, they may need to be expanded to 1 + * byte per pixel. This is what png_set_packing does (i.e., it + * unpacks the bit values into bytes.) + */ + if (png_ptr->bit_depth < 8) + png_set_packing(png_ptr); + } + + else /* bit depth is 16 */ + { + /* The 16-bit input values can be converted directly to 8-bit gamma + * encoded values; however, if a tRNS chunk is present 257 color-map + * entries are required. This means that the extra entry requires + * special processing; add an alpha channel, sacrifice gray level + * 254 and convert transparent (alpha==0) entries to that. + * + * Use libpng to chop the data to 8 bits. Convert it to sRGB at the + * same time to minimize quality loss. If a tRNS chunk is present + * this means libpng must handle it too; otherwise it is impossible + * to do the exact match on the 16-bit value. + * + * If the output has no alpha channel *and* the background color is + * gray then it is possible to let libpng handle the substitution by + * ensuring that the corresponding gray level matches the background + * color exactly. + */ + data_encoding = P_sRGB; + + if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "gray[16] color-map: too few entries"); + + cmap_entries = make_gray_colormap(display); + + if (png_ptr->num_trans > 0) + { + unsigned int back_alpha; + + if ((output_format & PNG_FORMAT_FLAG_ALPHA) != 0) + back_alpha = 0; + + else + { + if (back_r == back_g && back_g == back_b) + { + /* Background is gray; no special processing will be + * required. + */ + png_color_16 c; + png_uint_32 gray = back_g; + + if (output_encoding == P_LINEAR) + { + gray = PNG_sRGB_FROM_LINEAR(gray * 255); + + /* And make sure the corresponding palette entry + * matches. + */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 65535, P_LINEAR); + } + + /* The background passed to libpng, however, must be the + * sRGB value. + */ + c.index = 0; /*unused*/ + c.gray = c.red = c.green = c.blue = (png_uint_16)gray; + + /* NOTE: does this work without expanding tRNS to alpha? + * It should be the color->gray case below apparently + * doesn't. + */ + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + + output_processing = PNG_CMAP_NONE; + break; + } +#ifdef __COVERITY__ + /* Coverity claims that output_encoding cannot be 2 (P_LINEAR) + * here. + */ + back_alpha = 255; +#else + back_alpha = output_encoding == P_LINEAR ? 65535 : 255; +#endif + } + + /* output_processing means that the libpng-processed row will be + * 8-bit GA and it has to be processing to single byte color-map + * values. Entry 254 is replaced by either a completely + * transparent entry or by the background color at full + * precision (and the background color is not a simple gray + * level in this case.) + */ + expand_tRNS = 1; + output_processing = PNG_CMAP_TRANS; + background_index = 254; + + /* And set (overwrite) color-map entry 254 to the actual + * background color at full precision. + */ + png_create_colormap_entry(display, 254, back_r, back_g, back_b, + back_alpha, output_encoding); + } + + else + output_processing = PNG_CMAP_NONE; + } + break; + + case PNG_COLOR_TYPE_GRAY_ALPHA: + /* 8-bit or 16-bit PNG with two channels - gray and alpha. A minimum + * of 65536 combinations. If, however, the alpha channel is to be + * removed there are only 256 possibilities if the background is gray. + * (Otherwise there is a subset of the 65536 possibilities defined by + * the triangle between black, white and the background color.) + * + * Reduce 16-bit files to 8-bit and sRGB encode the result. No need to + * worry about tRNS matching - tRNS is ignored if there is an alpha + * channel. + */ + data_encoding = P_sRGB; + + if ((output_format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + if (PNG_GA_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "gray+alpha color-map: too few entries"); + + cmap_entries = make_ga_colormap(display); + + background_index = PNG_CMAP_GA_BACKGROUND; + output_processing = PNG_CMAP_GA; + } + + else /* alpha is removed */ + { + /* Alpha must be removed as the PNG data is processed when the + * background is a color because the G and A channels are + * independent and the vector addition (non-parallel vectors) is a + * 2-D problem. + * + * This can be reduced to the same algorithm as above by making a + * colormap containing gray levels (for the opaque grays), a + * background entry (for a transparent pixel) and a set of four six + * level color values, one set for each intermediate alpha value. + * See the comments in make_ga_colormap for how this works in the + * per-pixel processing. + * + * If the background is gray, however, we only need a 256 entry gray + * level color map. It is sufficient to make the entry generated + * for the background color be exactly the color specified. + */ + if ((output_format & PNG_FORMAT_FLAG_COLOR) == 0 || + (back_r == back_g && back_g == back_b)) + { + /* Background is gray; no special processing will be required. */ + png_color_16 c; + png_uint_32 gray = back_g; + + if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "gray-alpha color-map: too few entries"); + + cmap_entries = make_gray_colormap(display); + + if (output_encoding == P_LINEAR) + { + gray = PNG_sRGB_FROM_LINEAR(gray * 255); + + /* And make sure the corresponding palette entry matches. */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 65535, P_LINEAR); + } + + /* The background passed to libpng, however, must be the sRGB + * value. + */ + c.index = 0; /*unused*/ + c.gray = c.red = c.green = c.blue = (png_uint_16)gray; + + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + + output_processing = PNG_CMAP_NONE; + } + + else + { + png_uint_32 i, a; + + /* This is the same as png_make_ga_colormap, above, except that + * the entries are all opaque. + */ + if (PNG_GA_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "ga-alpha color-map: too few entries"); + + i = 0; + while (i < 231) + { + png_uint_32 gray = (i * 256 + 115) / 231; + png_create_colormap_entry(display, i++, gray, gray, gray, + 255, P_sRGB); + } + + /* NOTE: this preserves the full precision of the application + * background color. + */ + background_index = i; + png_create_colormap_entry(display, i++, back_r, back_g, back_b, +#ifdef __COVERITY__ + /* Coverity claims that output_encoding cannot be 2 (P_LINEAR) + * here. + */ 255U, +#else + output_encoding == P_LINEAR ? 65535U : 255U, +#endif + output_encoding); + + /* For non-opaque input composite on the sRGB background - this + * requires inverting the encoding for each component. The input + * is still converted to the sRGB encoding because this is a + * reasonable approximate to the logarithmic curve of human + * visual sensitivity, at least over the narrow range which PNG + * represents. Consequently 'G' is always sRGB encoded, while + * 'A' is linear. We need the linear background colors. + */ + if (output_encoding == P_sRGB) /* else already linear */ + { + /* This may produce a value not exactly matching the + * background, but that's ok because these numbers are only + * used when alpha != 0 + */ + back_r = png_sRGB_table[back_r]; + back_g = png_sRGB_table[back_g]; + back_b = png_sRGB_table[back_b]; + } + + for (a=1; a<5; ++a) + { + unsigned int g; + + /* PNG_sRGB_FROM_LINEAR expects a 16-bit linear value scaled + * by an 8-bit alpha value (0..255). + */ + png_uint_32 alpha = 51 * a; + png_uint_32 back_rx = (255-alpha) * back_r; + png_uint_32 back_gx = (255-alpha) * back_g; + png_uint_32 back_bx = (255-alpha) * back_b; + + for (g=0; g<6; ++g) + { + png_uint_32 gray = png_sRGB_table[g*51] * alpha; + + png_create_colormap_entry(display, i++, + PNG_sRGB_FROM_LINEAR(gray + back_rx), + PNG_sRGB_FROM_LINEAR(gray + back_gx), + PNG_sRGB_FROM_LINEAR(gray + back_bx), 255, P_sRGB); + } + } + + cmap_entries = i; + output_processing = PNG_CMAP_GA; + } + } + break; + + case PNG_COLOR_TYPE_RGB: + case PNG_COLOR_TYPE_RGB_ALPHA: + /* Exclude the case where the output is gray; we can always handle this + * with the cases above. + */ + if ((output_format & PNG_FORMAT_FLAG_COLOR) == 0) + { + /* The color-map will be grayscale, so we may as well convert the + * input RGB values to a simple grayscale and use the grayscale + * code above. + * + * NOTE: calling this apparently damages the recognition of the + * transparent color in background color handling; call + * png_set_tRNS_to_alpha before png_set_background_fixed. + */ + png_set_rgb_to_gray_fixed(png_ptr, PNG_ERROR_ACTION_NONE, -1, + -1); + data_encoding = P_sRGB; + + /* The output will now be one or two 8-bit gray or gray+alpha + * channels. The more complex case arises when the input has alpha. + */ + if ((png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) && + (output_format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* Both input and output have an alpha channel, so no background + * processing is required; just map the GA bytes to the right + * color-map entry. + */ + expand_tRNS = 1; + + if (PNG_GA_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "rgb[ga] color-map: too few entries"); + + cmap_entries = make_ga_colormap(display); + background_index = PNG_CMAP_GA_BACKGROUND; + output_processing = PNG_CMAP_GA; + } + + else + { + /* Either the input or the output has no alpha channel, so there + * will be no non-opaque pixels in the color-map; it will just be + * grayscale. + */ + if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "rgb[gray] color-map: too few entries"); + + /* Ideally this code would use libpng to do the gamma correction, + * but if an input alpha channel is to be removed we will hit the + * libpng bug in gamma+compose+rgb-to-gray (the double gamma + * correction bug). Fix this by dropping the gamma correction in + * this case and doing it in the palette; this will result in + * duplicate palette entries, but that's better than the + * alternative of double gamma correction. + */ + if ((png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) && + png_gamma_not_sRGB(png_ptr->colorspace.gamma) != 0) + { + cmap_entries = make_gray_file_colormap(display); + data_encoding = P_FILE; + } + + else + cmap_entries = make_gray_colormap(display); + + /* But if the input has alpha or transparency it must be removed + */ + if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) + { + png_color_16 c; + png_uint_32 gray = back_g; + + /* We need to ensure that the application background exists in + * the colormap and that completely transparent pixels map to + * it. Achieve this simply by ensuring that the entry + * selected for the background really is the background color. + */ + if (data_encoding == P_FILE) /* from the fixup above */ + { + /* The app supplied a gray which is in output_encoding, we + * need to convert it to a value of the input (P_FILE) + * encoding then set this palette entry to the required + * output encoding. + */ + if (output_encoding == P_sRGB) + gray = png_sRGB_table[gray]; /* now P_LINEAR */ + + gray = PNG_DIV257(png_gamma_16bit_correct(gray, + png_ptr->colorspace.gamma)); /* now P_FILE */ + + /* And make sure the corresponding palette entry contains + * exactly the required sRGB value. + */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 0/*unused*/, output_encoding); + } + + else if (output_encoding == P_LINEAR) + { + gray = PNG_sRGB_FROM_LINEAR(gray * 255); + + /* And make sure the corresponding palette entry matches. + */ + png_create_colormap_entry(display, gray, back_g, back_g, + back_g, 0/*unused*/, P_LINEAR); + } + + /* The background passed to libpng, however, must be the + * output (normally sRGB) value. + */ + c.index = 0; /*unused*/ + c.gray = c.red = c.green = c.blue = (png_uint_16)gray; + + /* NOTE: the following is apparently a bug in libpng. Without + * it the transparent color recognition in + * png_set_background_fixed seems to go wrong. + */ + expand_tRNS = 1; + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + } + + output_processing = PNG_CMAP_NONE; + } + } + + else /* output is color */ + { + /* We could use png_quantize here so long as there is no transparent + * color or alpha; png_quantize ignores alpha. Easier overall just + * to do it once and using PNG_DIV51 on the 6x6x6 reduced RGB cube. + * Consequently we always want libpng to produce sRGB data. + */ + data_encoding = P_sRGB; + + /* Is there any transparency or alpha? */ + if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + png_ptr->num_trans > 0) + { + /* Is there alpha in the output too? If so all four channels are + * processed into a special RGB cube with alpha support. + */ + if ((output_format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + png_uint_32 r; + + if (PNG_RGB_COLORMAP_ENTRIES+1+27 > image->colormap_entries) + png_error(png_ptr, "rgb+alpha color-map: too few entries"); + + cmap_entries = make_rgb_colormap(display); + + /* Add a transparent entry. */ + png_create_colormap_entry(display, cmap_entries, 255, 255, + 255, 0, P_sRGB); + + /* This is stored as the background index for the processing + * algorithm. + */ + background_index = cmap_entries++; + + /* Add 27 r,g,b entries each with alpha 0.5. */ + for (r=0; r<256; r = (r << 1) | 0x7f) + { + png_uint_32 g; + + for (g=0; g<256; g = (g << 1) | 0x7f) + { + png_uint_32 b; + + /* This generates components with the values 0, 127 and + * 255 + */ + for (b=0; b<256; b = (b << 1) | 0x7f) + png_create_colormap_entry(display, cmap_entries++, + r, g, b, 128, P_sRGB); + } + } + + expand_tRNS = 1; + output_processing = PNG_CMAP_RGB_ALPHA; + } + + else + { + /* Alpha/transparency must be removed. The background must + * exist in the color map (achieved by setting adding it after + * the 666 color-map). If the standard processing code will + * pick up this entry automatically that's all that is + * required; libpng can be called to do the background + * processing. + */ + unsigned int sample_size = + PNG_IMAGE_SAMPLE_SIZE(output_format); + png_uint_32 r, g, b; /* sRGB background */ + + if (PNG_RGB_COLORMAP_ENTRIES+1+27 > image->colormap_entries) + png_error(png_ptr, "rgb-alpha color-map: too few entries"); + + cmap_entries = make_rgb_colormap(display); + + png_create_colormap_entry(display, cmap_entries, back_r, + back_g, back_b, 0/*unused*/, output_encoding); + + if (output_encoding == P_LINEAR) + { + r = PNG_sRGB_FROM_LINEAR(back_r * 255); + g = PNG_sRGB_FROM_LINEAR(back_g * 255); + b = PNG_sRGB_FROM_LINEAR(back_b * 255); + } + + else + { + r = back_r; + g = back_g; + b = back_g; + } + + /* Compare the newly-created color-map entry with the one the + * PNG_CMAP_RGB algorithm will use. If the two entries don't + * match, add the new one and set this as the background + * index. + */ + if (memcmp((png_const_bytep)display->colormap + + sample_size * cmap_entries, + (png_const_bytep)display->colormap + + sample_size * PNG_RGB_INDEX(r,g,b), + sample_size) != 0) + { + /* The background color must be added. */ + background_index = cmap_entries++; + + /* Add 27 r,g,b entries each with created by composing with + * the background at alpha 0.5. + */ + for (r=0; r<256; r = (r << 1) | 0x7f) + { + for (g=0; g<256; g = (g << 1) | 0x7f) + { + /* This generates components with the values 0, 127 + * and 255 + */ + for (b=0; b<256; b = (b << 1) | 0x7f) + png_create_colormap_entry(display, cmap_entries++, + png_colormap_compose(display, r, P_sRGB, 128, + back_r, output_encoding), + png_colormap_compose(display, g, P_sRGB, 128, + back_g, output_encoding), + png_colormap_compose(display, b, P_sRGB, 128, + back_b, output_encoding), + 0/*unused*/, output_encoding); + } + } + + expand_tRNS = 1; + output_processing = PNG_CMAP_RGB_ALPHA; + } + + else /* background color is in the standard color-map */ + { + png_color_16 c; + + c.index = 0; /*unused*/ + c.red = (png_uint_16)back_r; + c.gray = c.green = (png_uint_16)back_g; + c.blue = (png_uint_16)back_b; + + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + + output_processing = PNG_CMAP_RGB; + } + } + } + + else /* no alpha or transparency in the input */ + { + /* Alpha in the output is irrelevant, simply map the opaque input + * pixels to the 6x6x6 color-map. + */ + if (PNG_RGB_COLORMAP_ENTRIES > image->colormap_entries) + png_error(png_ptr, "rgb color-map: too few entries"); + + cmap_entries = make_rgb_colormap(display); + output_processing = PNG_CMAP_RGB; + } + } + break; + + case PNG_COLOR_TYPE_PALETTE: + /* It's already got a color-map. It may be necessary to eliminate the + * tRNS entries though. + */ + { + unsigned int num_trans = png_ptr->num_trans; + png_const_bytep trans = num_trans > 0 ? png_ptr->trans_alpha : NULL; + png_const_colorp colormap = png_ptr->palette; + const int do_background = trans != NULL && + (output_format & PNG_FORMAT_FLAG_ALPHA) == 0; + unsigned int i; + + /* Just in case: */ + if (trans == NULL) + num_trans = 0; + + output_processing = PNG_CMAP_NONE; + data_encoding = P_FILE; /* Don't change from color-map indices */ + cmap_entries = png_ptr->num_palette; + if (cmap_entries > 256) + cmap_entries = 256; + + if (cmap_entries > image->colormap_entries) + png_error(png_ptr, "palette color-map: too few entries"); + + for (i=0; i < cmap_entries; ++i) + { + if (do_background != 0 && i < num_trans && trans[i] < 255) + { + if (trans[i] == 0) + png_create_colormap_entry(display, i, back_r, back_g, + back_b, 0, output_encoding); + + else + { + /* Must compose the PNG file color in the color-map entry + * on the sRGB color in 'back'. + */ + png_create_colormap_entry(display, i, + png_colormap_compose(display, colormap[i].red, P_FILE, + trans[i], back_r, output_encoding), + png_colormap_compose(display, colormap[i].green, P_FILE, + trans[i], back_g, output_encoding), + png_colormap_compose(display, colormap[i].blue, P_FILE, + trans[i], back_b, output_encoding), + output_encoding == P_LINEAR ? trans[i] * 257U : + trans[i], + output_encoding); + } + } + + else + png_create_colormap_entry(display, i, colormap[i].red, + colormap[i].green, colormap[i].blue, + i < num_trans ? trans[i] : 255U, P_FILE/*8-bit*/); + } + + /* The PNG data may have indices packed in fewer than 8 bits, it + * must be expanded if so. + */ + if (png_ptr->bit_depth < 8) + png_set_packing(png_ptr); + } + break; + + default: + png_error(png_ptr, "invalid PNG color type"); + /*NOT REACHED*/ + } + + /* Now deal with the output processing */ + if (expand_tRNS != 0 && png_ptr->num_trans > 0 && + (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) == 0) + png_set_tRNS_to_alpha(png_ptr); + + switch (data_encoding) + { + case P_sRGB: + /* Change to 8-bit sRGB */ + png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB); + /* FALL THROUGH */ + + case P_FILE: + if (png_ptr->bit_depth > 8) + png_set_scale_16(png_ptr); + break; + +#ifdef __GNUC__ + default: + png_error(png_ptr, "bad data option (internal error)"); +#endif + } + + if (cmap_entries > 256 || cmap_entries > image->colormap_entries) + png_error(png_ptr, "color map overflow (BAD internal error)"); + + image->colormap_entries = cmap_entries; + + /* Double check using the recorded background index */ + switch (output_processing) + { + case PNG_CMAP_NONE: + if (background_index != PNG_CMAP_NONE_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_GA: + if (background_index != PNG_CMAP_GA_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_TRANS: + if (background_index >= cmap_entries || + background_index != PNG_CMAP_TRANS_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_RGB: + if (background_index != PNG_CMAP_RGB_BACKGROUND) + goto bad_background; + break; + + case PNG_CMAP_RGB_ALPHA: + if (background_index != PNG_CMAP_RGB_ALPHA_BACKGROUND) + goto bad_background; + break; + + default: + png_error(png_ptr, "bad processing option (internal error)"); + + bad_background: + png_error(png_ptr, "bad background index (internal error)"); + } + + display->colormap_processing = output_processing; + + return 1/*ok*/; +} + +/* The final part of the color-map read called from png_image_finish_read. */ +static int +png_image_read_and_map(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + int passes; + + /* Called when the libpng data must be transformed into the color-mapped + * form. There is a local row buffer in display->local and this routine must + * do the interlace handling. + */ + switch (png_ptr->interlaced) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + png_error(png_ptr, "unknown interlace type"); + } + + { + png_uint_32 height = image->height; + png_uint_32 width = image->width; + int proc = display->colormap_processing; + png_bytep first_row = png_voidcast(png_bytep, display->first_row); + ptrdiff_t step_row = display->row_bytes; + int pass; + + for (pass = 0; pass < passes; ++pass) + { + unsigned int startx, stepx, stepy; + png_uint_32 y; + + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass); + stepx = PNG_PASS_COL_OFFSET(pass); + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = stepy = 1; + } + + for (; y<height; y += stepy) + { + png_bytep inrow = png_voidcast(png_bytep, display->local_row); + png_bytep outrow = first_row + y * step_row; + png_const_bytep end_row = outrow + width; + + /* Read read the libpng data into the temporary buffer. */ + png_read_row(png_ptr, inrow, NULL); + + /* Now process the row according to the processing option, note + * that the caller verifies that the format of the libpng output + * data is as required. + */ + outrow += startx; + switch (proc) + { + case PNG_CMAP_GA: + for (; outrow < end_row; outrow += stepx) + { + /* The data is always in the PNG order */ + unsigned int gray = *inrow++; + unsigned int alpha = *inrow++; + unsigned int entry; + + /* NOTE: this code is copied as a comment in + * make_ga_colormap above. Please update the + * comment if you change this code! + */ + if (alpha > 229) /* opaque */ + { + entry = (231 * gray + 128) >> 8; + } + else if (alpha < 26) /* transparent */ + { + entry = 231; + } + else /* partially opaque */ + { + entry = 226 + 6 * PNG_DIV51(alpha) + PNG_DIV51(gray); + } + + *outrow = (png_byte)entry; + } + break; + + case PNG_CMAP_TRANS: + for (; outrow < end_row; outrow += stepx) + { + png_byte gray = *inrow++; + png_byte alpha = *inrow++; + + if (alpha == 0) + *outrow = PNG_CMAP_TRANS_BACKGROUND; + + else if (gray != PNG_CMAP_TRANS_BACKGROUND) + *outrow = gray; + + else + *outrow = (png_byte)(PNG_CMAP_TRANS_BACKGROUND+1); + } + break; + + case PNG_CMAP_RGB: + for (; outrow < end_row; outrow += stepx) + { + *outrow = PNG_RGB_INDEX(inrow[0], inrow[1], inrow[2]); + inrow += 3; + } + break; + + case PNG_CMAP_RGB_ALPHA: + for (; outrow < end_row; outrow += stepx) + { + unsigned int alpha = inrow[3]; + + /* Because the alpha entries only hold alpha==0.5 values + * split the processing at alpha==0.25 (64) and 0.75 + * (196). + */ + + if (alpha >= 196) + *outrow = PNG_RGB_INDEX(inrow[0], inrow[1], + inrow[2]); + + else if (alpha < 64) + *outrow = PNG_CMAP_RGB_ALPHA_BACKGROUND; + + else + { + /* Likewise there are three entries for each of r, g + * and b. We could select the entry by popcount on + * the top two bits on those architectures that + * support it, this is what the code below does, + * crudely. + */ + unsigned int back_i = PNG_CMAP_RGB_ALPHA_BACKGROUND+1; + + /* Here are how the values map: + * + * 0x00 .. 0x3f -> 0 + * 0x40 .. 0xbf -> 1 + * 0xc0 .. 0xff -> 2 + * + * So, as above with the explicit alpha checks, the + * breakpoints are at 64 and 196. + */ + if (inrow[0] & 0x80) back_i += 9; /* red */ + if (inrow[0] & 0x40) back_i += 9; + if (inrow[0] & 0x80) back_i += 3; /* green */ + if (inrow[0] & 0x40) back_i += 3; + if (inrow[0] & 0x80) back_i += 1; /* blue */ + if (inrow[0] & 0x40) back_i += 1; + + *outrow = (png_byte)back_i; + } + + inrow += 4; + } + break; + + default: + break; + } + } + } + } + + return 1; +} + +static int +png_image_read_colormapped(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_controlp control = image->opaque; + png_structrp png_ptr = control->png_ptr; + png_inforp info_ptr = control->info_ptr; + + int passes = 0; /* As a flag */ + + PNG_SKIP_CHUNKS(png_ptr); + + /* Update the 'info' structure and make sure the result is as required; first + * make sure to turn on the interlace handling if it will be required + * (because it can't be turned on *after* the call to png_read_update_info!) + */ + if (display->colormap_processing == PNG_CMAP_NONE) + passes = png_set_interlace_handling(png_ptr); + + png_read_update_info(png_ptr, info_ptr); + + /* The expected output can be deduced from the colormap_processing option. */ + switch (display->colormap_processing) + { + case PNG_CMAP_NONE: + /* Output must be one channel and one byte per pixel, the output + * encoding can be anything. + */ + if ((info_ptr->color_type == PNG_COLOR_TYPE_PALETTE || + info_ptr->color_type == PNG_COLOR_TYPE_GRAY) && + info_ptr->bit_depth == 8) + break; + + goto bad_output; + + case PNG_CMAP_TRANS: + case PNG_CMAP_GA: + /* Output must be two channels and the 'G' one must be sRGB, the latter + * can be checked with an exact number because it should have been set + * to this number above! + */ + if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && + info_ptr->bit_depth == 8 && + png_ptr->screen_gamma == PNG_GAMMA_sRGB && + image->colormap_entries == 256) + break; + + goto bad_output; + + case PNG_CMAP_RGB: + /* Output must be 8-bit sRGB encoded RGB */ + if (info_ptr->color_type == PNG_COLOR_TYPE_RGB && + info_ptr->bit_depth == 8 && + png_ptr->screen_gamma == PNG_GAMMA_sRGB && + image->colormap_entries == 216) + break; + + goto bad_output; + + case PNG_CMAP_RGB_ALPHA: + /* Output must be 8-bit sRGB encoded RGBA */ + if (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA && + info_ptr->bit_depth == 8 && + png_ptr->screen_gamma == PNG_GAMMA_sRGB && + image->colormap_entries == 244 /* 216 + 1 + 27 */) + break; + + /* goto bad_output; */ + /* FALL THROUGH */ + + default: + bad_output: + png_error(png_ptr, "bad color-map processing (internal error)"); + } + + /* Now read the rows. Do this here if it is possible to read directly into + * the output buffer, otherwise allocate a local row buffer of the maximum + * size libpng requires and call the relevant processing routine safely. + */ + { + png_voidp first_row = display->buffer; + ptrdiff_t row_bytes = display->row_stride; + + /* The following expression is designed to work correctly whether it gives + * a signed or an unsigned result. + */ + if (row_bytes < 0) + { + char *ptr = png_voidcast(char*, first_row); + ptr += (image->height-1) * (-row_bytes); + first_row = png_voidcast(png_voidp, ptr); + } + + display->first_row = first_row; + display->row_bytes = row_bytes; + } + + if (passes == 0) + { + int result; + png_voidp row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); + + display->local_row = row; + result = png_safe_execute(image, png_image_read_and_map, display); + display->local_row = NULL; + png_free(png_ptr, row); + + return result; + } + + else + { + png_alloc_size_t row_bytes = display->row_bytes; + + while (--passes >= 0) + { + png_uint_32 y = image->height; + png_bytep row = png_voidcast(png_bytep, display->first_row); + + while (y-- > 0) + { + png_read_row(png_ptr, row, NULL); + row += row_bytes; + } + } + + return 1; + } +} + +/* Just the row reading part of png_image_read. */ +static int +png_image_read_composite(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + int passes; + + switch (png_ptr->interlaced) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + png_error(png_ptr, "unknown interlace type"); + } + + { + png_uint_32 height = image->height; + png_uint_32 width = image->width; + ptrdiff_t step_row = display->row_bytes; + unsigned int channels = + (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; + int pass; + + for (pass = 0; pass < passes; ++pass) + { + unsigned int startx, stepx, stepy; + png_uint_32 y; + + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass) * channels; + stepx = PNG_PASS_COL_OFFSET(pass) * channels; + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = channels; + stepy = 1; + } + + for (; y<height; y += stepy) + { + png_bytep inrow = png_voidcast(png_bytep, display->local_row); + png_bytep outrow; + png_const_bytep end_row; + + /* Read the row, which is packed: */ + png_read_row(png_ptr, inrow, NULL); + + outrow = png_voidcast(png_bytep, display->first_row); + outrow += y * step_row; + end_row = outrow + width * channels; + + /* Now do the composition on each pixel in this row. */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_byte alpha = inrow[channels]; + + if (alpha > 0) /* else no change to the output */ + { + unsigned int c; + + for (c=0; c<channels; ++c) + { + png_uint_32 component = inrow[c]; + + if (alpha < 255) /* else just use component */ + { + /* This is PNG_OPTIMIZED_ALPHA, the component value + * is a linear 8-bit value. Combine this with the + * current outrow[c] value which is sRGB encoded. + * Arithmetic here is 16-bits to preserve the output + * values correctly. + */ + component *= 257*255; /* =65535 */ + component += (255-alpha)*png_sRGB_table[outrow[c]]; + + /* So 'component' is scaled by 255*65535 and is + * therefore appropriate for the sRGB to linear + * conversion table. + */ + component = PNG_sRGB_FROM_LINEAR(component); + } + + outrow[c] = (png_byte)component; + } + } + + inrow += channels+1; /* components and alpha channel */ + } + } + } + } + + return 1; +} + +/* The do_local_background case; called when all the following transforms are to + * be done: + * + * PNG_RGB_TO_GRAY + * PNG_COMPOSITE + * PNG_GAMMA + * + * This is a work-around for the fact that both the PNG_RGB_TO_GRAY and + * PNG_COMPOSITE code performs gamma correction, so we get double gamma + * correction. The fix-up is to prevent the PNG_COMPOSITE operation from + * happening inside libpng, so this routine sees an 8 or 16-bit gray+alpha + * row and handles the removal or pre-multiplication of the alpha channel. + */ +static int +png_image_read_background(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + png_uint_32 height = image->height; + png_uint_32 width = image->width; + int pass, passes; + + /* Double check the convoluted logic below. We expect to get here with + * libpng doing rgb to gray and gamma correction but background processing + * left to the png_image_read_background function. The rows libpng produce + * might be 8 or 16-bit but should always have two channels; gray plus alpha. + */ + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == 0) + png_error(png_ptr, "lost rgb to gray"); + + if ((png_ptr->transformations & PNG_COMPOSE) != 0) + png_error(png_ptr, "unexpected compose"); + + if (png_get_channels(png_ptr, info_ptr) != 2) + png_error(png_ptr, "lost/gained channels"); + + /* Expect the 8-bit case to always remove the alpha channel */ + if ((image->format & PNG_FORMAT_FLAG_LINEAR) == 0 && + (image->format & PNG_FORMAT_FLAG_ALPHA) != 0) + png_error(png_ptr, "unexpected 8-bit transformation"); + + switch (png_ptr->interlaced) + { + case PNG_INTERLACE_NONE: + passes = 1; + break; + + case PNG_INTERLACE_ADAM7: + passes = PNG_INTERLACE_ADAM7_PASSES; + break; + + default: + png_error(png_ptr, "unknown interlace type"); + } + + /* Use direct access to info_ptr here because otherwise the simplified API + * would require PNG_EASY_ACCESS_SUPPORTED (just for this.) Note this is + * checking the value after libpng expansions, not the original value in the + * PNG. + */ + switch (info_ptr->bit_depth) + { + case 8: + /* 8-bit sRGB gray values with an alpha channel; the alpha channel is + * to be removed by composing on a background: either the row if + * display->background is NULL or display->background->green if not. + * Unlike the code above ALPHA_OPTIMIZED has *not* been done. + */ + { + png_bytep first_row = png_voidcast(png_bytep, display->first_row); + ptrdiff_t step_row = display->row_bytes; + + for (pass = 0; pass < passes; ++pass) + { + png_bytep row = png_voidcast(png_bytep, + display->first_row); + unsigned int startx, stepx, stepy; + png_uint_32 y; + + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass); + stepx = PNG_PASS_COL_OFFSET(pass); + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = stepy = 1; + } + + if (display->background == NULL) + { + for (; y<height; y += stepy) + { + png_bytep inrow = png_voidcast(png_bytep, + display->local_row); + png_bytep outrow = first_row + y * step_row; + png_const_bytep end_row = outrow + width; + + /* Read the row, which is packed: */ + png_read_row(png_ptr, inrow, NULL); + + /* Now do the composition on each pixel in this row. */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_byte alpha = inrow[1]; + + if (alpha > 0) /* else no change to the output */ + { + png_uint_32 component = inrow[0]; + + if (alpha < 255) /* else just use component */ + { + /* Since PNG_OPTIMIZED_ALPHA was not set it is + * necessary to invert the sRGB transfer + * function and multiply the alpha out. + */ + component = png_sRGB_table[component] * alpha; + component += png_sRGB_table[outrow[0]] * + (255-alpha); + component = PNG_sRGB_FROM_LINEAR(component); + } + + outrow[0] = (png_byte)component; + } + + inrow += 2; /* gray and alpha channel */ + } + } + } + + else /* constant background value */ + { + png_byte background8 = display->background->green; + png_uint_16 background = png_sRGB_table[background8]; + + for (; y<height; y += stepy) + { + png_bytep inrow = png_voidcast(png_bytep, + display->local_row); + png_bytep outrow = first_row + y * step_row; + png_const_bytep end_row = outrow + width; + + /* Read the row, which is packed: */ + png_read_row(png_ptr, inrow, NULL); + + /* Now do the composition on each pixel in this row. */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_byte alpha = inrow[1]; + + if (alpha > 0) /* else use background */ + { + png_uint_32 component = inrow[0]; + + if (alpha < 255) /* else just use component */ + { + component = png_sRGB_table[component] * alpha; + component += background * (255-alpha); + component = PNG_sRGB_FROM_LINEAR(component); + } + + outrow[0] = (png_byte)component; + } + + else + outrow[0] = background8; + + inrow += 2; /* gray and alpha channel */ + } + + row += display->row_bytes; + } + } + } + } + break; + + case 16: + /* 16-bit linear with pre-multiplied alpha; the pre-multiplication must + * still be done and, maybe, the alpha channel removed. This code also + * handles the alpha-first option. + */ + { + png_uint_16p first_row = png_voidcast(png_uint_16p, + display->first_row); + /* The division by two is safe because the caller passed in a + * stride which was multiplied by 2 (below) to get row_bytes. + */ + ptrdiff_t step_row = display->row_bytes / 2; + int preserve_alpha = (image->format & PNG_FORMAT_FLAG_ALPHA) != 0; + unsigned int outchannels = 1+preserve_alpha; + int swap_alpha = 0; + +# ifdef PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED + if (preserve_alpha != 0 && + (image->format & PNG_FORMAT_FLAG_AFIRST) != 0) + swap_alpha = 1; +# endif + + for (pass = 0; pass < passes; ++pass) + { + unsigned int startx, stepx, stepy; + png_uint_32 y; + + /* The 'x' start and step are adjusted to output components here. + */ + if (png_ptr->interlaced == PNG_INTERLACE_ADAM7) + { + /* The row may be empty for a short image: */ + if (PNG_PASS_COLS(width, pass) == 0) + continue; + + startx = PNG_PASS_START_COL(pass) * outchannels; + stepx = PNG_PASS_COL_OFFSET(pass) * outchannels; + y = PNG_PASS_START_ROW(pass); + stepy = PNG_PASS_ROW_OFFSET(pass); + } + + else + { + y = 0; + startx = 0; + stepx = outchannels; + stepy = 1; + } + + for (; y<height; y += stepy) + { + png_const_uint_16p inrow; + png_uint_16p outrow = first_row + y*step_row; + png_uint_16p end_row = outrow + width * outchannels; + + /* Read the row, which is packed: */ + png_read_row(png_ptr, png_voidcast(png_bytep, + display->local_row), NULL); + inrow = png_voidcast(png_const_uint_16p, display->local_row); + + /* Now do the pre-multiplication on each pixel in this row. + */ + outrow += startx; + for (; outrow < end_row; outrow += stepx) + { + png_uint_32 component = inrow[0]; + png_uint_16 alpha = inrow[1]; + + if (alpha > 0) /* else 0 */ + { + if (alpha < 65535) /* else just use component */ + { + component *= alpha; + component += 32767; + component /= 65535; + } + } + + else + component = 0; + + outrow[swap_alpha] = (png_uint_16)component; + if (preserve_alpha != 0) + outrow[1 ^ swap_alpha] = alpha; + + inrow += 2; /* components and alpha channel */ + } + } + } + } + break; + +#ifdef __GNUC__ + default: + png_error(png_ptr, "unexpected bit depth"); +#endif + } + + return 1; +} + +/* The guts of png_image_finish_read as a png_safe_execute callback. */ +static int +png_image_read_direct(png_voidp argument) +{ + png_image_read_control *display = png_voidcast(png_image_read_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + + png_uint_32 format = image->format; + int linear = (format & PNG_FORMAT_FLAG_LINEAR) != 0; + int do_local_compose = 0; + int do_local_background = 0; /* to avoid double gamma correction bug */ + int passes = 0; + + /* Add transforms to ensure the correct output format is produced then check + * that the required implementation support is there. Always expand; always + * need 8 bits minimum, no palette and expanded tRNS. + */ + png_set_expand(png_ptr); + + /* Now check the format to see if it was modified. */ + { + png_uint_32 base_format = png_image_format(png_ptr) & + ~PNG_FORMAT_FLAG_COLORMAP /* removed by png_set_expand */; + png_uint_32 change = format ^ base_format; + png_fixed_point output_gamma; + int mode; /* alpha mode */ + + /* Do this first so that we have a record if rgb to gray is happening. */ + if ((change & PNG_FORMAT_FLAG_COLOR) != 0) + { + /* gray<->color transformation required. */ + if ((format & PNG_FORMAT_FLAG_COLOR) != 0) + png_set_gray_to_rgb(png_ptr); + + else + { + /* libpng can't do both rgb to gray and + * background/pre-multiplication if there is also significant gamma + * correction, because both operations require linear colors and + * the code only supports one transform doing the gamma correction. + * Handle this by doing the pre-multiplication or background + * operation in this code, if necessary. + * + * TODO: fix this by rewriting pngrtran.c (!) + * + * For the moment (given that fixing this in pngrtran.c is an + * enormous change) 'do_local_background' is used to indicate that + * the problem exists. + */ + if ((base_format & PNG_FORMAT_FLAG_ALPHA) != 0) + do_local_background = 1/*maybe*/; + + png_set_rgb_to_gray_fixed(png_ptr, PNG_ERROR_ACTION_NONE, + PNG_RGB_TO_GRAY_DEFAULT, PNG_RGB_TO_GRAY_DEFAULT); + } + + change &= ~PNG_FORMAT_FLAG_COLOR; + } + + /* Set the gamma appropriately, linear for 16-bit input, sRGB otherwise. + */ + { + png_fixed_point input_gamma_default; + + if ((base_format & PNG_FORMAT_FLAG_LINEAR) != 0 && + (image->flags & PNG_IMAGE_FLAG_16BIT_sRGB) == 0) + input_gamma_default = PNG_GAMMA_LINEAR; + else + input_gamma_default = PNG_DEFAULT_sRGB; + + /* Call png_set_alpha_mode to set the default for the input gamma; the + * output gamma is set by a second call below. + */ + png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, input_gamma_default); + } + + if (linear != 0) + { + /* If there *is* an alpha channel in the input it must be multiplied + * out; use PNG_ALPHA_STANDARD, otherwise just use PNG_ALPHA_PNG. + */ + if ((base_format & PNG_FORMAT_FLAG_ALPHA) != 0) + mode = PNG_ALPHA_STANDARD; /* associated alpha */ + + else + mode = PNG_ALPHA_PNG; + + output_gamma = PNG_GAMMA_LINEAR; + } + + else + { + mode = PNG_ALPHA_PNG; + output_gamma = PNG_DEFAULT_sRGB; + } + + /* If 'do_local_background' is set check for the presence of gamma + * correction; this is part of the work-round for the libpng bug + * described above. + * + * TODO: fix libpng and remove this. + */ + if (do_local_background != 0) + { + png_fixed_point gtest; + + /* This is 'png_gamma_threshold' from pngrtran.c; the test used for + * gamma correction, the screen gamma hasn't been set on png_struct + * yet; it's set below. png_struct::gamma, however, is set to the + * final value. + */ + if (png_muldiv(>est, output_gamma, png_ptr->colorspace.gamma, + PNG_FP_1) != 0 && png_gamma_significant(gtest) == 0) + do_local_background = 0; + + else if (mode == PNG_ALPHA_STANDARD) + { + do_local_background = 2/*required*/; + mode = PNG_ALPHA_PNG; /* prevent libpng doing it */ + } + + /* else leave as 1 for the checks below */ + } + + /* If the bit-depth changes then handle that here. */ + if ((change & PNG_FORMAT_FLAG_LINEAR) != 0) + { + if (linear != 0 /*16-bit output*/) + png_set_expand_16(png_ptr); + + else /* 8-bit output */ + png_set_scale_16(png_ptr); + + change &= ~PNG_FORMAT_FLAG_LINEAR; + } + + /* Now the background/alpha channel changes. */ + if ((change & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* Removing an alpha channel requires composition for the 8-bit + * formats; for the 16-bit it is already done, above, by the + * pre-multiplication and the channel just needs to be stripped. + */ + if ((base_format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* If RGB->gray is happening the alpha channel must be left and the + * operation completed locally. + * + * TODO: fix libpng and remove this. + */ + if (do_local_background != 0) + do_local_background = 2/*required*/; + + /* 16-bit output: just remove the channel */ + else if (linear != 0) /* compose on black (well, pre-multiply) */ + png_set_strip_alpha(png_ptr); + + /* 8-bit output: do an appropriate compose */ + else if (display->background != NULL) + { + png_color_16 c; + + c.index = 0; /*unused*/ + c.red = display->background->red; + c.green = display->background->green; + c.blue = display->background->blue; + c.gray = display->background->green; + + /* This is always an 8-bit sRGB value, using the 'green' channel + * for gray is much better than calculating the luminance here; + * we can get off-by-one errors in that calculation relative to + * the app expectations and that will show up in transparent + * pixels. + */ + png_set_background_fixed(png_ptr, &c, + PNG_BACKGROUND_GAMMA_SCREEN, 0/*need_expand*/, + 0/*gamma: not used*/); + } + + else /* compose on row: implemented below. */ + { + do_local_compose = 1; + /* This leaves the alpha channel in the output, so it has to be + * removed by the code below. Set the encoding to the 'OPTIMIZE' + * one so the code only has to hack on the pixels that require + * composition. + */ + mode = PNG_ALPHA_OPTIMIZED; + } + } + + else /* output needs an alpha channel */ + { + /* This is tricky because it happens before the swap operation has + * been accomplished; however, the swap does *not* swap the added + * alpha channel (weird API), so it must be added in the correct + * place. + */ + png_uint_32 filler; /* opaque filler */ + int where; + + if (linear != 0) + filler = 65535; + + else + filler = 255; + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED + if ((format & PNG_FORMAT_FLAG_AFIRST) != 0) + { + where = PNG_FILLER_BEFORE; + change &= ~PNG_FORMAT_FLAG_AFIRST; + } + + else +#endif + where = PNG_FILLER_AFTER; + + png_set_add_alpha(png_ptr, filler, where); + } + + /* This stops the (irrelevant) call to swap_alpha below. */ + change &= ~PNG_FORMAT_FLAG_ALPHA; + } + + /* Now set the alpha mode correctly; this is always done, even if there is + * no alpha channel in either the input or the output because it correctly + * sets the output gamma. + */ + png_set_alpha_mode_fixed(png_ptr, mode, output_gamma); + +# ifdef PNG_FORMAT_BGR_SUPPORTED + if ((change & PNG_FORMAT_FLAG_BGR) != 0) + { + /* Check only the output format; PNG is never BGR; don't do this if + * the output is gray, but fix up the 'format' value in that case. + */ + if ((format & PNG_FORMAT_FLAG_COLOR) != 0) + png_set_bgr(png_ptr); + + else + format &= ~PNG_FORMAT_FLAG_BGR; + + change &= ~PNG_FORMAT_FLAG_BGR; + } +# endif + +# ifdef PNG_FORMAT_AFIRST_SUPPORTED + if ((change & PNG_FORMAT_FLAG_AFIRST) != 0) + { + /* Only relevant if there is an alpha channel - it's particularly + * important to handle this correctly because do_local_compose may + * be set above and then libpng will keep the alpha channel for this + * code to remove. + */ + if ((format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + /* Disable this if doing a local background, + * TODO: remove this when local background is no longer required. + */ + if (do_local_background != 2) + png_set_swap_alpha(png_ptr); + } + + else + format &= ~PNG_FORMAT_FLAG_AFIRST; + + change &= ~PNG_FORMAT_FLAG_AFIRST; + } +# endif + + /* If the *output* is 16-bit then we need to check for a byte-swap on this + * architecture. + */ + if (linear != 0) + { + PNG_CONST png_uint_16 le = 0x0001; + + if ((*(png_const_bytep) & le) != 0) + png_set_swap(png_ptr); + } + + /* If change is not now 0 some transformation is missing - error out. */ + if (change != 0) + png_error(png_ptr, "png_read_image: unsupported transformation"); + } + + PNG_SKIP_CHUNKS(png_ptr); + + /* Update the 'info' structure and make sure the result is as required; first + * make sure to turn on the interlace handling if it will be required + * (because it can't be turned on *after* the call to png_read_update_info!) + * + * TODO: remove the do_local_background fixup below. + */ + if (do_local_compose == 0 && do_local_background != 2) + passes = png_set_interlace_handling(png_ptr); + + png_read_update_info(png_ptr, info_ptr); + + { + png_uint_32 info_format = 0; + + if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) + info_format |= PNG_FORMAT_FLAG_COLOR; + + if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0) + { + /* do_local_compose removes this channel below. */ + if (do_local_compose == 0) + { + /* do_local_background does the same if required. */ + if (do_local_background != 2 || + (format & PNG_FORMAT_FLAG_ALPHA) != 0) + info_format |= PNG_FORMAT_FLAG_ALPHA; + } + } + + else if (do_local_compose != 0) /* internal error */ + png_error(png_ptr, "png_image_read: alpha channel lost"); + + if (info_ptr->bit_depth == 16) + info_format |= PNG_FORMAT_FLAG_LINEAR; + +#ifdef PNG_FORMAT_BGR_SUPPORTED + if ((png_ptr->transformations & PNG_BGR) != 0) + info_format |= PNG_FORMAT_FLAG_BGR; +#endif + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED + if (do_local_background == 2) + { + if ((format & PNG_FORMAT_FLAG_AFIRST) != 0) + info_format |= PNG_FORMAT_FLAG_AFIRST; + } + + if ((png_ptr->transformations & PNG_SWAP_ALPHA) != 0 || + ((png_ptr->transformations & PNG_ADD_ALPHA) != 0 && + (png_ptr->flags & PNG_FLAG_FILLER_AFTER) == 0)) + { + if (do_local_background == 2) + png_error(png_ptr, "unexpected alpha swap transformation"); + + info_format |= PNG_FORMAT_FLAG_AFIRST; + } +# endif + + /* This is actually an internal error. */ + if (info_format != format) + png_error(png_ptr, "png_read_image: invalid transformations"); + } + + /* Now read the rows. If do_local_compose is set then it is necessary to use + * a local row buffer. The output will be GA, RGBA or BGRA and must be + * converted to G, RGB or BGR as appropriate. The 'local_row' member of the + * display acts as a flag. + */ + { + png_voidp first_row = display->buffer; + ptrdiff_t row_bytes = display->row_stride; + + if (linear != 0) + row_bytes *= 2; + + /* The following expression is designed to work correctly whether it gives + * a signed or an unsigned result. + */ + if (row_bytes < 0) + { + char *ptr = png_voidcast(char*, first_row); + ptr += (image->height-1) * (-row_bytes); + first_row = png_voidcast(png_voidp, ptr); + } + + display->first_row = first_row; + display->row_bytes = row_bytes; + } + + if (do_local_compose != 0) + { + int result; + png_voidp row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); + + display->local_row = row; + result = png_safe_execute(image, png_image_read_composite, display); + display->local_row = NULL; + png_free(png_ptr, row); + + return result; + } + + else if (do_local_background == 2) + { + int result; + png_voidp row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); + + display->local_row = row; + result = png_safe_execute(image, png_image_read_background, display); + display->local_row = NULL; + png_free(png_ptr, row); + + return result; + } + + else + { + png_alloc_size_t row_bytes = display->row_bytes; + + while (--passes >= 0) + { + png_uint_32 y = image->height; + png_bytep row = png_voidcast(png_bytep, display->first_row); + + while (y-- > 0) + { + png_read_row(png_ptr, row, NULL); + row += row_bytes; + } + } + + return 1; + } +} + +int PNGAPI +png_image_finish_read(png_imagep image, png_const_colorp background, + void *buffer, png_int_32 row_stride, void *colormap) +{ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + /* Check for row_stride overflow. This check is not performed on the + * original PNG format because it may not occur in the output PNG format + * and libpng deals with the issues of reading the original. + */ + const unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format); + + if (image->width <= 0x7FFFFFFFU/channels) /* no overflow */ + { + png_uint_32 check; + const png_uint_32 png_row_stride = image->width * channels; + + if (row_stride == 0) + row_stride = (png_int_32)/*SAFE*/png_row_stride; + + if (row_stride < 0) + check = -row_stride; + + else + check = row_stride; + + if (image->opaque != NULL && buffer != NULL && check >= png_row_stride) + { + /* Now check for overflow of the image buffer calculation; this + * limits the whole image size to 32 bits for API compatibility with + * the current, 32-bit, PNG_IMAGE_BUFFER_SIZE macro. + */ + if (image->height <= 0xFFFFFFFF/png_row_stride) + { + if ((image->format & PNG_FORMAT_FLAG_COLORMAP) == 0 || + (image->colormap_entries > 0 && colormap != NULL)) + { + int result; + png_image_read_control display; + + memset(&display, 0, (sizeof display)); + display.image = image; + display.buffer = buffer; + display.row_stride = row_stride; + display.colormap = colormap; + display.background = background; + display.local_row = NULL; + + /* Choose the correct 'end' routine; for the color-map case + * all the setup has already been done. + */ + if ((image->format & PNG_FORMAT_FLAG_COLORMAP) != 0) + result = png_safe_execute(image, + png_image_read_colormap, &display) && + png_safe_execute(image, + png_image_read_colormapped, &display); + + else + result = + png_safe_execute(image, + png_image_read_direct, &display); + + png_image_free(image); + return result; + } + + else + return png_image_error(image, + "png_image_finish_read[color-map]: no color-map"); + } + + else + return png_image_error(image, + "png_image_finish_read: image too large"); + } + + else + return png_image_error(image, + "png_image_finish_read: invalid argument"); + } + + else + return png_image_error(image, + "png_image_finish_read: row_stride too large"); + } + + else if (image != NULL) + return png_image_error(image, + "png_image_finish_read: damaged PNG_IMAGE_VERSION"); + + return 0; +} + +#endif /* SIMPLIFIED_READ */ +#endif /* READ */ diff --git a/drivers/png/pngrio.c b/drivers/png/pngrio.c index b4042e9ed3..5101d54a62 100644 --- a/drivers/png/pngrio.c +++ b/drivers/png/pngrio.c @@ -1,8 +1,8 @@ /* pngrio.c - functions for data input * - * Last changed in libpng 1.5.0 [January 6, 2011] - * Copyright (c) 1998-2002,2004,2006-2011 Glenn Randers-Pehrson + * Last changed in libpng 1.6.17 [March 26, 2015] + * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -26,10 +26,10 @@ * reads from a file pointer. Note that this routine sometimes gets called * with very small lengths, so you should implement some kind of simple * buffering if you are using unbuffered reads. This should never be asked - * to read more than 64K on a 16 bit machine. + * to read more than 64K on a 16-bit machine. */ void /* PRIVATE */ -png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) +png_read_data(png_structrp png_ptr, png_bytep data, png_size_t length) { png_debug1(4, "reading %d bytes", (int)length); @@ -46,7 +46,6 @@ png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) * read_data function and use it at run time with png_set_read_fn(), rather * than changing the library. */ -# ifndef USE_FAR_KEYWORD void PNGCBAPI png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) { @@ -58,68 +57,11 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) /* fread() returns 0 on error, so it is OK to store this in a png_size_t * instead of an int, which is what fread() actually returns. */ - check = fread(data, 1, length, (png_FILE_p)png_ptr->io_ptr); + check = fread(data, 1, length, png_voidcast(png_FILE_p, png_ptr->io_ptr)); if (check != length) png_error(png_ptr, "Read Error"); } -# else -/* This is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void PNGCBAPI -png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - png_byte *n_data; - png_FILE_p io_ptr; - - if (png_ptr == NULL) - return; - - /* Check if data really is near. If so, use usual code. */ - n_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - - if ((png_bytep)n_data == data) - { - check = fread(n_data, 1, length, io_ptr); - } - - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t read, remaining, err; - check = 0; - remaining = length; - - do - { - read = MIN(NEAR_BUF_SIZE, remaining); - err = fread(buf, 1, read, io_ptr); - png_memcpy(data, buf, read); /* copy far buffer to near buffer */ - - if (err != read) - break; - - else - check += err; - - data += read; - remaining -= read; - } - while (remaining != 0); - } - - if ((png_uint_32)check != (png_uint_32)length) - png_error(png_ptr, "read Error"); -} -# endif #endif /* This function allows the application to supply a new input function @@ -142,7 +84,7 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) * be used. */ void PNGAPI -png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, +png_set_read_fn(png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn) { if (png_ptr == NULL) @@ -160,6 +102,7 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, png_ptr->read_data_fn = read_data_fn; #endif +#ifdef PNG_WRITE_SUPPORTED /* It is an error to write to a read device */ if (png_ptr->write_data_fn != NULL) { @@ -168,9 +111,10 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, "Can't set both read_data_fn and write_data_fn in the" " same structure"); } +#endif #ifdef PNG_WRITE_FLUSH_SUPPORTED png_ptr->output_flush_fn = NULL; #endif } -#endif /* PNG_READ_SUPPORTED */ +#endif /* READ */ diff --git a/drivers/png/pngrtran.c b/drivers/png/pngrtran.c index f273362616..3138147aff 100644 --- a/drivers/png/pngrtran.c +++ b/drivers/png/pngrtran.c @@ -1,8 +1,8 @@ /* pngrtran.c - transforms the data in a row for PNG readers * - * Last changed in libpng 1.5.24 [November 12, 2015] - * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.22 [May 26, 2016] + * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -22,7 +22,7 @@ /* Set the action on getting a CRC error for an ancillary or critical chunk. */ void PNGAPI -png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action) +png_set_crc_action(png_structrp png_ptr, int crit_action, int ancil_action) { png_debug(1, "in png_set_crc_action"); @@ -88,16 +88,47 @@ png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action) } } +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +/* Is it OK to set a transformation now? Only if png_start_read_image or + * png_read_update_info have not been called. It is not necessary for the IHDR + * to have been read in all cases; the need_IHDR parameter allows for this + * check too. + */ +static int +png_rtran_ok(png_structrp png_ptr, int need_IHDR) +{ + if (png_ptr != NULL) + { + if ((png_ptr->flags & PNG_FLAG_ROW_INIT) != 0) + png_app_error(png_ptr, + "invalid after png_start_read_image or png_read_update_info"); + + else if (need_IHDR && (png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_app_error(png_ptr, "invalid before the PNG header has been read"); + + else + { + /* Turn on failure to initialize correctly for all transforms. */ + png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; + + return 1; /* Ok */ + } + } + + return 0; /* no png_error possible! */ +} +#endif + #ifdef PNG_READ_BACKGROUND_SUPPORTED /* Handle alpha and tRNS via a background color */ void PNGFAPI -png_set_background_fixed(png_structp png_ptr, +png_set_background_fixed(png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, int need_expand, png_fixed_point background_gamma) { png_debug(1, "in png_set_background_fixed"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0 || background_color == NULL) return; if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN) @@ -110,8 +141,7 @@ png_set_background_fixed(png_structp png_ptr, png_ptr->transformations &= ~PNG_ENCODE_ALPHA; png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; - png_memcpy(&(png_ptr->background), background_color, - png_sizeof(png_color_16)); + png_ptr->background = *background_color; png_ptr->background_gamma = background_gamma; png_ptr->background_gamma_type = (png_byte)(background_gamma_code); if (need_expand != 0) @@ -122,14 +152,14 @@ png_set_background_fixed(png_structp png_ptr, # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_background(png_structp png_ptr, +png_set_background(png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, int need_expand, double background_gamma) { png_set_background_fixed(png_ptr, background_color, background_gamma_code, need_expand, png_fixed(png_ptr, background_gamma, "png_set_background")); } -# endif /* FLOATING_POINT */ +# endif /* FLOATING_POINT */ #endif /* READ_BACKGROUND */ /* Scale 16-bit depth files to 8-bit depth. If both of these are set then the @@ -138,11 +168,11 @@ png_set_background(png_structp png_ptr, */ #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED void PNGAPI -png_set_scale_16(png_structp png_ptr) +png_set_scale_16(png_structrp png_ptr) { png_debug(1, "in png_set_scale_16"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= PNG_SCALE_16_TO_8; @@ -152,11 +182,11 @@ png_set_scale_16(png_structp png_ptr) #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED /* Chop 16-bit depth files to 8-bit depth */ void PNGAPI -png_set_strip_16(png_structp png_ptr) +png_set_strip_16(png_structrp png_ptr) { png_debug(1, "in png_set_strip_16"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= PNG_16_TO_8; @@ -165,11 +195,11 @@ png_set_strip_16(png_structp png_ptr) #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED void PNGAPI -png_set_strip_alpha(png_structp png_ptr) +png_set_strip_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_strip_alpha"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= PNG_STRIP_ALPHA; @@ -178,7 +208,7 @@ png_set_strip_alpha(png_structp png_ptr) #if defined(PNG_READ_ALPHA_MODE_SUPPORTED) || defined(PNG_READ_GAMMA_SUPPORTED) static png_fixed_point -translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma, +translate_gamma_flags(png_structrp png_ptr, png_fixed_point output_gamma, int is_screen) { /* Check for flag values. The main reason for having the old Mac value as a @@ -217,7 +247,7 @@ translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma, # ifdef PNG_FLOATING_POINT_SUPPORTED static png_fixed_point -convert_gamma_value(png_structp png_ptr, double output_gamma) +convert_gamma_value(png_structrp png_ptr, double output_gamma) { /* The following silently ignores cases where fixed point (times 100,000) * gamma values are passed to the floating point API. This is safe and it @@ -242,7 +272,7 @@ convert_gamma_value(png_structp png_ptr, double output_gamma) #ifdef PNG_READ_ALPHA_MODE_SUPPORTED void PNGFAPI -png_set_alpha_mode_fixed(png_structp png_ptr, int mode, +png_set_alpha_mode_fixed(png_structrp png_ptr, int mode, png_fixed_point output_gamma) { int compose = 0; @@ -250,7 +280,7 @@ png_set_alpha_mode_fixed(png_structp png_ptr, int mode, png_debug(1, "in png_set_alpha_mode"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; output_gamma = translate_gamma_flags(png_ptr, output_gamma, 1/*screen*/); @@ -259,9 +289,12 @@ png_set_alpha_mode_fixed(png_structp png_ptr, int mode, * is expected to be 1 or greater, but this range test allows for some * viewing correction values. The intent is to weed out users of this API * who use the inverse of the gamma value accidentally! Since some of these - * values are reasonable this may have to be changed. + * values are reasonable this may have to be changed: + * + * 1.6.x: changed from 0.07..3 to 0.01..100 (to accomodate the optimal 16-bit + * gamma of 36, and its reciprocal.) */ - if (output_gamma < 70000 || output_gamma > 300000) + if (output_gamma < 1000 || output_gamma > 10000000) png_error(png_ptr, "output gamma out of expected range"); /* The default file gamma is the inverse of the output gamma; the output @@ -322,8 +355,11 @@ png_set_alpha_mode_fixed(png_structp png_ptr, int mode, * the side effect that the gamma in a second call to png_set_alpha_mode will * be ignored.) */ - if (png_ptr->gamma == 0) - png_ptr->gamma = file_gamma; + if (png_ptr->colorspace.gamma == 0) + { + png_ptr->colorspace.gamma = file_gamma; + png_ptr->colorspace.flags |= PNG_COLORSPACE_HAVE_GAMMA; + } /* But always set the output gamma: */ png_ptr->screen_gamma = output_gamma; @@ -334,25 +370,22 @@ png_set_alpha_mode_fixed(png_structp png_ptr, int mode, if (compose != 0) { /* And obtain alpha pre-multiplication by composing on black: */ - png_memset(&png_ptr->background, 0, sizeof png_ptr->background); - png_ptr->background_gamma = png_ptr->gamma; /* just in case */ + memset(&png_ptr->background, 0, (sizeof png_ptr->background)); + png_ptr->background_gamma = png_ptr->colorspace.gamma; /* just in case */ png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_FILE; png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND; - if (png_ptr->transformations & PNG_COMPOSE) + if ((png_ptr->transformations & PNG_COMPOSE) != 0) png_error(png_ptr, "conflicting calls to set alpha mode and background"); png_ptr->transformations |= PNG_COMPOSE; } - - /* New API, make sure apps call the correct initializers: */ - png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_alpha_mode(png_structp png_ptr, int mode, double output_gamma) +png_set_alpha_mode(png_structrp png_ptr, int mode, double output_gamma) { png_set_alpha_mode_fixed(png_ptr, mode, convert_gamma_value(png_ptr, output_gamma)); @@ -364,7 +397,7 @@ png_set_alpha_mode(png_structp png_ptr, int mode, double output_gamma) /* Dither file to 8-bit. Supply a palette, the current number * of elements in the palette, the maximum number of elements * allowed, and a histogram if possible. If the current number - * of colors is greater then the maximum number, the palette will be + * of colors is greater than the maximum number, the palette will be * modified to fit in the maximum number. "full_quantize" indicates * whether we need a quantizing cube set up for RGB images, or if we * simply are reducing the number of colors in a paletted image. @@ -372,21 +405,21 @@ png_set_alpha_mode(png_structp png_ptr, int mode, double output_gamma) typedef struct png_dsort_struct { - struct png_dsort_struct FAR * next; + struct png_dsort_struct * next; png_byte left; png_byte right; } png_dsort; -typedef png_dsort FAR * png_dsortp; -typedef png_dsort FAR * FAR * png_dsortpp; +typedef png_dsort * png_dsortp; +typedef png_dsort * * png_dsortpp; void PNGAPI -png_set_quantize(png_structp png_ptr, png_colorp palette, +png_set_quantize(png_structrp png_ptr, png_colorp palette, int num_palette, int maximum_colors, png_const_uint_16p histogram, int full_quantize) { png_debug(1, "in png_set_quantize"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= PNG_QUANTIZE; @@ -396,7 +429,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, int i; png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * (sizeof (png_byte)))); for (i = 0; i < num_palette; i++) png_ptr->quantize_index[i] = (png_byte)i; } @@ -413,7 +446,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, /* Initialize an array to sort colors */ png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * (sizeof (png_byte)))); /* Initialize the quantize_sort array */ for (i = 0; i < num_palette; i++) @@ -547,9 +580,9 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, /* Initialize palette index arrays */ png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * (sizeof (png_byte)))); png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * png_sizeof(png_byte))); + (png_uint_32)(num_palette * (sizeof (png_byte)))); /* Initialize the sort array */ for (i = 0; i < num_palette; i++) @@ -559,7 +592,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, } hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 * - png_sizeof(png_dsortp))); + (sizeof (png_dsortp)))); num_new_palette = num_palette; @@ -589,7 +622,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, { t = (png_dsortp)png_malloc_warn(png_ptr, - (png_uint_32)(png_sizeof(png_dsort))); + (png_uint_32)(sizeof (png_dsort))); if (t == NULL) break; @@ -714,12 +747,12 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, png_size_t num_entries = ((png_size_t)1 << total_bits); png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr, - (png_uint_32)(num_entries * png_sizeof(png_byte))); + (png_uint_32)(num_entries * (sizeof (png_byte)))); distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries * - png_sizeof(png_byte))); + (sizeof (png_byte)))); - png_memset(distance, 0xff, num_entries * png_sizeof(png_byte)); + memset(distance, 0xff, num_entries * (sizeof (png_byte))); for (i = 0; i < num_palette; i++) { @@ -764,23 +797,22 @@ png_set_quantize(png_structp png_ptr, png_colorp palette, png_free(png_ptr, distance); } } -#endif /* PNG_READ_QUANTIZE_SUPPORTED */ +#endif /* READ_QUANTIZE */ #ifdef PNG_READ_GAMMA_SUPPORTED void PNGFAPI -png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma, +png_set_gamma_fixed(png_structrp png_ptr, png_fixed_point scrn_gamma, png_fixed_point file_gamma) { png_debug(1, "in png_set_gamma_fixed"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; /* New in libpng-1.5.4 - reserve particular negative values as flags. */ scrn_gamma = translate_gamma_flags(png_ptr, scrn_gamma, 1/*screen*/); file_gamma = translate_gamma_flags(png_ptr, file_gamma, 0/*file*/); -#if PNG_LIBPNG_VER >= 10600 /* Checking the gamma values for being >0 was added in 1.5.4 along with the * premultiplied alpha support; this actually hides an undocumented feature * of the previous implementation which allowed gamma processing to be @@ -789,31 +821,32 @@ png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma, * accept '0' for the gamma value it takes, because it isn't always used. * * Since this is an API change (albeit a very minor one that removes an - * undocumented API feature) it will not be made until libpng-1.6.0. + * undocumented API feature) the following checks were only enabled in + * libpng-1.6.0. */ if (file_gamma <= 0) png_error(png_ptr, "invalid file gamma in png_set_gamma"); if (scrn_gamma <= 0) png_error(png_ptr, "invalid screen gamma in png_set_gamma"); -#endif /* Set the gamma values unconditionally - this overrides the value in the PNG * file if a gAMA chunk was present. png_set_alpha_mode provides a * different, easier, way to default the file gamma. */ - png_ptr->gamma = file_gamma; + png_ptr->colorspace.gamma = file_gamma; + png_ptr->colorspace.flags |= PNG_COLORSPACE_HAVE_GAMMA; png_ptr->screen_gamma = scrn_gamma; } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) +png_set_gamma(png_structrp png_ptr, double scrn_gamma, double file_gamma) { png_set_gamma_fixed(png_ptr, convert_gamma_value(png_ptr, scrn_gamma), convert_gamma_value(png_ptr, file_gamma)); } -# endif /* FLOATING_POINT_SUPPORTED */ +# endif /* FLOATING_POINT */ #endif /* READ_GAMMA */ #ifdef PNG_READ_EXPAND_SUPPORTED @@ -822,15 +855,14 @@ png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) * to alpha channels. */ void PNGAPI -png_set_expand(png_structp png_ptr) +png_set_expand(png_structrp png_ptr) { png_debug(1, "in png_set_expand"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } /* GRR 19990627: the following three functions currently are identical @@ -853,90 +885,85 @@ png_set_expand(png_structp png_ptr) /* Expand paletted images to RGB. */ void PNGAPI -png_set_palette_to_rgb(png_structp png_ptr) +png_set_palette_to_rgb(png_structrp png_ptr) { png_debug(1, "in png_set_palette_to_rgb"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } /* Expand grayscale images of less than 8-bit depth to 8 bits. */ void PNGAPI -png_set_expand_gray_1_2_4_to_8(png_structp png_ptr) +png_set_expand_gray_1_2_4_to_8(png_structrp png_ptr) { png_debug(1, "in png_set_expand_gray_1_2_4_to_8"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= PNG_EXPAND; - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } - - /* Expand tRNS chunks to alpha channels. */ void PNGAPI -png_set_tRNS_to_alpha(png_structp png_ptr) +png_set_tRNS_to_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_tRNS_to_alpha"); + if (png_rtran_ok(png_ptr, 0) == 0) + return; + png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; } -#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */ +#endif /* READ_EXPAND */ #ifdef PNG_READ_EXPAND_16_SUPPORTED /* Expand to 16-bit channels, expand the tRNS chunk too (because otherwise * it may not work correctly.) */ void PNGAPI -png_set_expand_16(png_structp png_ptr) +png_set_expand_16(png_structrp png_ptr) { png_debug(1, "in png_set_expand_16"); - if (png_ptr == NULL) + if (png_rtran_ok(png_ptr, 0) == 0) return; png_ptr->transformations |= (PNG_EXPAND_16 | PNG_EXPAND | PNG_EXPAND_tRNS); - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; - - /* New API, make sure apps call the correct initializers: */ - png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; } #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED void PNGAPI -png_set_gray_to_rgb(png_structp png_ptr) +png_set_gray_to_rgb(png_structrp png_ptr) { png_debug(1, "in png_set_gray_to_rgb"); - if (png_ptr != NULL) - { - /* Because rgb must be 8 bits or more: */ - png_set_expand_gray_1_2_4_to_8(png_ptr); - png_ptr->transformations |= PNG_GRAY_TO_RGB; - png_ptr->flags &= ~PNG_FLAG_ROW_INIT; - } + if (png_rtran_ok(png_ptr, 0) == 0) + return; + + /* Because rgb must be 8 bits or more: */ + png_set_expand_gray_1_2_4_to_8(png_ptr); + png_ptr->transformations |= PNG_GRAY_TO_RGB; } #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED void PNGFAPI -png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, +png_set_rgb_to_gray_fixed(png_structrp png_ptr, int error_action, png_fixed_point red, png_fixed_point green) { png_debug(1, "in png_set_rgb_to_gray"); - if (png_ptr == NULL) + /* Need the IHDR here because of the check on color_type below. */ + /* TODO: fix this */ + if (png_rtran_ok(png_ptr, 1) == 0) return; - switch(error_action) + switch (error_action) { case PNG_ERROR_ACTION_NONE: png_ptr->transformations |= PNG_RGB_TO_GRAY; @@ -952,17 +979,20 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, default: png_error(png_ptr, "invalid error action to rgb_to_gray"); - break; } + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) #ifdef PNG_READ_EXPAND_SUPPORTED png_ptr->transformations |= PNG_EXPAND; #else { - png_warning(png_ptr, + /* Make this an error in 1.6 because otherwise the application may assume + * that it just worked and get a memory overwrite. + */ + png_error(png_ptr, "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED"); - png_ptr->transformations &= ~PNG_RGB_TO_GRAY; + /* png_ptr->transformations &= ~PNG_RGB_TO_GRAY; */ } #endif { @@ -986,7 +1016,7 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, else { if (red >= 0 && green >= 0) - png_warning(png_ptr, + png_app_warning(png_ptr, "ignoring out of range rgb_to_gray coefficients"); /* Use the defaults, from the cHRM chunk if set, else the historical @@ -1012,31 +1042,25 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, */ void PNGAPI -png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red, +png_set_rgb_to_gray(png_structrp png_ptr, int error_action, double red, double green) { - if (png_ptr == NULL) - return; - png_set_rgb_to_gray_fixed(png_ptr, error_action, png_fixed(png_ptr, red, "rgb to gray red coefficient"), png_fixed(png_ptr, green, "rgb to gray green coefficient")); } #endif /* FLOATING POINT */ -#endif +#endif /* RGB_TO_GRAY */ #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) void PNGAPI -png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr +png_set_read_user_transform_fn(png_structrp png_ptr, png_user_transform_ptr read_user_transform_fn) { png_debug(1, "in png_set_read_user_transform_fn"); - if (png_ptr == NULL) - return; - #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED png_ptr->transformations |= PNG_USER_TRANSFORM; png_ptr->read_user_transform_fn = read_user_transform_fn; @@ -1076,7 +1100,7 @@ png_gamma_threshold(png_fixed_point screen_gamma, png_fixed_point file_gamma) * extracted from 'png_init_read_transformations'. */ static void /* PRIVATE */ -png_init_palette_transformations(png_structp png_ptr) +png_init_palette_transformations(png_structrp png_ptr) { /* Called to handle the (input) palette case. In png_do_read_transformations * the first step is to expand the palette if requested, so this code must @@ -1132,8 +1156,8 @@ png_init_palette_transformations(png_structp png_ptr) /* The following code cannot be entered in the alpha pre-multiplication case * because PNG_BACKGROUND_EXPAND is cancelled below. */ - if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - (png_ptr->transformations & PNG_EXPAND)) + if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) != 0 && + (png_ptr->transformations & PNG_EXPAND) != 0) { { png_ptr->background.red = @@ -1144,9 +1168,9 @@ png_init_palette_transformations(png_structp png_ptr) png_ptr->palette[png_ptr->background.index].blue; #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_ALPHA) + if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0) { - if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) + if ((png_ptr->transformations & PNG_EXPAND_tRNS) == 0) { /* Invert the alpha channel (in tRNS) unless the pixels are * going to be expanded, in which case leave it for later @@ -1158,14 +1182,14 @@ png_init_palette_transformations(png_structp png_ptr) png_ptr->trans_alpha[i]); } } -#endif /* PNG_READ_INVERT_ALPHA_SUPPORTED */ +#endif /* READ_INVERT_ALPHA */ } } /* background expand and (therefore) no alpha association. */ -#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ +#endif /* READ_EXPAND && READ_BACKGROUND */ } static void /* PRIVATE */ -png_init_rgb_transformations(png_structp png_ptr) +png_init_rgb_transformations(png_structrp png_ptr) { /* Added to libpng-1.5.4: check the color type to determine whether there * is any alpha or transparency in the image and simply cancel the @@ -1199,9 +1223,9 @@ png_init_rgb_transformations(png_structp png_ptr) /* The following code cannot be entered in the alpha pre-multiplication case * because PNG_BACKGROUND_EXPAND is cancelled below. */ - if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - (png_ptr->transformations & PNG_EXPAND) && - !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) + if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) != 0 && + (png_ptr->transformations & PNG_EXPAND) != 0 && + (png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0) /* i.e., GRAY or GRAY_ALPHA */ { { @@ -1229,7 +1253,7 @@ png_init_rgb_transformations(png_structp png_ptr) default: case 8: - /* FALL THROUGH (already 8 bits) */ + /* FALL THROUGH (Already 8 bits) */ case 16: /* Already a full 16 bits */ @@ -1239,18 +1263,18 @@ png_init_rgb_transformations(png_structp png_ptr) png_ptr->background.red = png_ptr->background.green = png_ptr->background.blue = (png_uint_16)gray; - if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) + if ((png_ptr->transformations & PNG_EXPAND_tRNS) == 0) { png_ptr->trans_color.red = png_ptr->trans_color.green = png_ptr->trans_color.blue = (png_uint_16)trans_gray; } } } /* background expand and (therefore) no alpha association. */ -#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ +#endif /* READ_EXPAND && READ_BACKGROUND */ } void /* PRIVATE */ -png_init_read_transformations(png_structp png_ptr) +png_init_read_transformations(png_structrp png_ptr) { png_debug(1, "in png_init_read_transformations"); @@ -1275,17 +1299,17 @@ png_init_read_transformations(png_structp png_ptr) */ int gamma_correction = 0; - if (png_ptr->gamma != 0) /* has been set */ + if (png_ptr->colorspace.gamma != 0) /* has been set */ { if (png_ptr->screen_gamma != 0) /* screen set too */ - gamma_correction = png_gamma_threshold(png_ptr->gamma, + gamma_correction = png_gamma_threshold(png_ptr->colorspace.gamma, png_ptr->screen_gamma); else /* Assume the output matches the input; a long time default behavior * of libpng, although the standard has nothing to say about this. */ - png_ptr->screen_gamma = png_reciprocal(png_ptr->gamma); + png_ptr->screen_gamma = png_reciprocal(png_ptr->colorspace.gamma); } else if (png_ptr->screen_gamma != 0) @@ -1294,7 +1318,7 @@ png_init_read_transformations(png_structp png_ptr) * png_set_alpha_mode (even if the alpha handling mode isn't required * or isn't changed from the default.) */ - png_ptr->gamma = png_reciprocal(png_ptr->screen_gamma); + png_ptr->colorspace.gamma = png_reciprocal(png_ptr->screen_gamma); else /* neither are set */ /* Just in case the following prevents any processing - file and screen @@ -1302,7 +1326,10 @@ png_init_read_transformations(png_structp png_ptr) * third gamma value other than png_set_background with 'UNIQUE', and, * prior to 1.5.4 */ - png_ptr->screen_gamma = png_ptr->gamma = PNG_FP_1; + png_ptr->screen_gamma = png_ptr->colorspace.gamma = PNG_FP_1; + + /* We have a gamma value now. */ + png_ptr->colorspace.flags |= PNG_COLORSPACE_HAVE_GAMMA; /* Now turn the gamma transformation on or off as appropriate. Notice * that PNG_GAMMA just refers to the file->screen correction. Alpha @@ -1339,19 +1366,19 @@ png_init_read_transformations(png_structp png_ptr) * 12) PNG_EXPAND_16 * 13) PNG_GRAY_TO_RGB iff PNG_BACKGROUND_IS_GRAY * 14) PNG_INVERT_MONO - * 15) PNG_SHIFT - * 16) PNG_PACK - * 17) PNG_BGR - * 18) PNG_PACKSWAP - * 19) PNG_FILLER (includes PNG_ADD_ALPHA) - * 20) PNG_INVERT_ALPHA + * 15) PNG_INVERT_ALPHA + * 16) PNG_SHIFT + * 17) PNG_PACK + * 18) PNG_BGR + * 19) PNG_PACKSWAP + * 20) PNG_FILLER (includes PNG_ADD_ALPHA) * 21) PNG_SWAP_ALPHA * 22) PNG_SWAP_BYTES * 23) PNG_USER_TRANSFORM [must be last] */ #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if ((png_ptr->transformations & PNG_STRIP_ALPHA) && - !(png_ptr->transformations & PNG_COMPOSE)) + if ((png_ptr->transformations & PNG_STRIP_ALPHA) != 0 && + (png_ptr->transformations & PNG_COMPOSE) == 0) { /* Stripping the alpha channel happens immediately after the 'expand' * transformations, before all other transformation, so it cancels out @@ -1377,16 +1404,23 @@ png_init_read_transformations(png_structp png_ptr) /* If the screen gamma is about 1.0 then the OPTIMIZE_ALPHA and ENCODE_ALPHA * settings will have no effect. */ - if (!png_gamma_significant(png_ptr->screen_gamma)) + if (png_gamma_significant(png_ptr->screen_gamma) == 0) { png_ptr->transformations &= ~PNG_ENCODE_ALPHA; png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; } #endif -#if defined(PNG_READ_EXPAND_SUPPORTED) && \ - defined(PNG_READ_BACKGROUND_SUPPORTED) && \ - defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Make sure the coefficients for the rgb to gray conversion are set + * appropriately. + */ + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) != 0) + png_colorspace_set_rgb_coefficients(png_ptr); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) /* Detect gray background and attempt to enable optimization for * gray --> RGB case. * @@ -1402,23 +1436,23 @@ png_init_read_transformations(png_structp png_ptr) * png_set_background, along with the bit depth, then the code has a record * of exactly what color space the background is currently in. */ - if (png_ptr->transformations & PNG_BACKGROUND_EXPAND) + if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) != 0) { /* PNG_BACKGROUND_EXPAND: the background is in the file color space, so if * the file was grayscale the background value is gray. */ - if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) + if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0) png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; } - else if (png_ptr->transformations & PNG_COMPOSE) + else if ((png_ptr->transformations & PNG_COMPOSE) != 0) { /* PNG_COMPOSE: png_set_background was called with need_expand false, * so the color is in the color space of the output or png_set_alpha_mode * was called and the color is black. Ignore RGB_TO_GRAY because that * happens before GRAY_TO_RGB. */ - if (png_ptr->transformations & PNG_GRAY_TO_RGB) + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) != 0) { if (png_ptr->background.red == png_ptr->background.green && png_ptr->background.red == png_ptr->background.blue) @@ -1428,7 +1462,8 @@ png_init_read_transformations(png_structp png_ptr) } } } -#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED (etc) */ +#endif /* READ_EXPAND && READ_BACKGROUND */ +#endif /* READ_GRAY_TO_RGB */ /* For indexed PNG data (PNG_COLOR_TYPE_PALETTE) many of the transformations * can be performed directly on the palette, and some (such as rgb to gray) @@ -1449,10 +1484,10 @@ png_init_read_transformations(png_structp png_ptr) #if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ defined(PNG_READ_EXPAND_16_SUPPORTED) - if ((png_ptr->transformations & PNG_EXPAND_16) && - (png_ptr->transformations & PNG_COMPOSE) && - !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - png_ptr->bit_depth != 16) + if ((png_ptr->transformations & PNG_EXPAND_16) != 0 && + (png_ptr->transformations & PNG_COMPOSE) != 0 && + (png_ptr->transformations & PNG_BACKGROUND_EXPAND) == 0 && + png_ptr->bit_depth != 16) { /* TODO: fix this. Because the expand_16 operation is after the compose * handling the background color must be 8, not 16, bits deep, but the @@ -1464,22 +1499,22 @@ png_init_read_transformations(png_structp png_ptr) * NOTE: this discards the low 16 bits of the user supplied background * color, but until expand_16 works properly there is no choice! */ -# define CHOP(x) (x)=((png_uint_16)(((png_uint_32)(x)*255+32895) >> 16)) +# define CHOP(x) (x)=((png_uint_16)PNG_DIV257(x)) CHOP(png_ptr->background.red); CHOP(png_ptr->background.green); CHOP(png_ptr->background.blue); CHOP(png_ptr->background.gray); # undef CHOP } -#endif /* PNG_READ_BACKGROUND_SUPPORTED && PNG_READ_EXPAND_16_SUPPORTED */ +#endif /* READ_BACKGROUND && READ_EXPAND_16 */ #if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ (defined(PNG_READ_SCALE_16_TO_8_SUPPORTED) || \ defined(PNG_READ_STRIP_16_TO_8_SUPPORTED)) - if ((png_ptr->transformations & (PNG_16_TO_8|PNG_SCALE_16_TO_8)) && - (png_ptr->transformations & PNG_COMPOSE) && - !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) && - png_ptr->bit_depth == 16) + if ((png_ptr->transformations & (PNG_16_TO_8|PNG_SCALE_16_TO_8)) != 0 && + (png_ptr->transformations & PNG_COMPOSE) != 0 && + (png_ptr->transformations & PNG_BACKGROUND_EXPAND) == 0 && + png_ptr->bit_depth == 16) { /* On the other hand, if a 16-bit file is to be reduced to 8-bits per * component this will also happen after PNG_COMPOSE and so the background @@ -1522,25 +1557,24 @@ png_init_read_transformations(png_structp png_ptr) * file gamma - if it is not 1.0 both RGB_TO_GRAY and COMPOSE need the * tables. */ - if ((png_ptr->transformations & PNG_GAMMA) - || ((png_ptr->transformations & PNG_RGB_TO_GRAY) - && (png_gamma_significant(png_ptr->gamma) || - png_gamma_significant(png_ptr->screen_gamma))) - || ((png_ptr->transformations & PNG_COMPOSE) - && (png_gamma_significant(png_ptr->gamma) - || png_gamma_significant(png_ptr->screen_gamma) + if ((png_ptr->transformations & PNG_GAMMA) != 0 || + ((png_ptr->transformations & PNG_RGB_TO_GRAY) != 0 && + (png_gamma_significant(png_ptr->colorspace.gamma) != 0 || + png_gamma_significant(png_ptr->screen_gamma) != 0)) || + ((png_ptr->transformations & PNG_COMPOSE) != 0 && + (png_gamma_significant(png_ptr->colorspace.gamma) != 0 || + png_gamma_significant(png_ptr->screen_gamma) != 0 # ifdef PNG_READ_BACKGROUND_SUPPORTED - || (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_UNIQUE - && png_gamma_significant(png_ptr->background_gamma)) + || (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_UNIQUE && + png_gamma_significant(png_ptr->background_gamma) != 0) # endif - )) || ((png_ptr->transformations & PNG_ENCODE_ALPHA) - && png_gamma_significant(png_ptr->screen_gamma)) - ) + )) || ((png_ptr->transformations & PNG_ENCODE_ALPHA) != 0 && + png_gamma_significant(png_ptr->screen_gamma) != 0)) { png_build_gamma_table(png_ptr, png_ptr->bit_depth); #ifdef PNG_READ_BACKGROUND_SUPPORTED - if (png_ptr->transformations & PNG_COMPOSE) + if ((png_ptr->transformations & PNG_COMPOSE) != 0) { /* Issue a warning about this combination: because RGB_TO_GRAY is * optimized to do the gamma transform if present yet do_background has @@ -1548,11 +1582,11 @@ png_init_read_transformations(png_structp png_ptr) * double-gamma-correction happens. This is true in all versions of * libpng to date. */ - if (png_ptr->transformations & PNG_RGB_TO_GRAY) + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) != 0) png_warning(png_ptr, "libpng does not support gamma+background+rgb_to_gray"); - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + if ((png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) != 0) { /* We don't get to here unless there is a tRNS chunk with non-opaque * entries - see the checking code at the start of this function. @@ -1584,8 +1618,8 @@ png_init_read_transformations(png_structp png_ptr) break; case PNG_BACKGROUND_GAMMA_FILE: - g = png_reciprocal(png_ptr->gamma); - gs = png_reciprocal2(png_ptr->gamma, + g = png_reciprocal(png_ptr->colorspace.gamma); + gs = png_reciprocal2(png_ptr->colorspace.gamma, png_ptr->screen_gamma); break; @@ -1600,7 +1634,7 @@ png_init_read_transformations(png_structp png_ptr) break; } - if (png_gamma_significant(gs)) + if (png_gamma_significant(gs) != 0) { back.red = png_gamma_8bit_correct(png_ptr->background.red, gs); @@ -1617,7 +1651,7 @@ png_init_read_transformations(png_structp png_ptr) back.blue = (png_byte)png_ptr->background.blue; } - if (png_gamma_significant(g)) + if (png_gamma_significant(g) != 0) { back_1.red = png_gamma_8bit_correct(png_ptr->background.red, g); @@ -1693,8 +1727,9 @@ png_init_read_transformations(png_structp png_ptr) break; case PNG_BACKGROUND_GAMMA_FILE: - g = png_reciprocal(png_ptr->gamma); - gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma); + g = png_reciprocal(png_ptr->colorspace.gamma); + gs = png_reciprocal2(png_ptr->colorspace.gamma, + png_ptr->screen_gamma); break; case PNG_BACKGROUND_GAMMA_UNIQUE: @@ -1765,7 +1800,7 @@ png_init_read_transformations(png_structp png_ptr) else /* Transformation does not include PNG_BACKGROUND */ -#endif /* PNG_READ_BACKGROUND_SUPPORTED */ +#endif /* READ_BACKGROUND */ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED /* RGB_TO_GRAY needs to have non-gamma-corrected values! */ @@ -1795,11 +1830,11 @@ png_init_read_transformations(png_structp png_ptr) #ifdef PNG_READ_BACKGROUND_SUPPORTED else #endif -#endif /* PNG_READ_GAMMA_SUPPORTED */ +#endif /* READ_GAMMA */ #ifdef PNG_READ_BACKGROUND_SUPPORTED /* No GAMMA transformation (see the hanging else 4 lines above) */ - if ((png_ptr->transformations & PNG_COMPOSE) && + if ((png_ptr->transformations & PNG_COMPOSE) != 0 && (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)) { int i; @@ -1834,11 +1869,11 @@ png_init_read_transformations(png_structp png_ptr) png_ptr->transformations &= ~PNG_COMPOSE; } -#endif /* PNG_READ_BACKGROUND_SUPPORTED */ +#endif /* READ_BACKGROUND */ #ifdef PNG_READ_SHIFT_SUPPORTED - if ((png_ptr->transformations & PNG_SHIFT) && - !(png_ptr->transformations & PNG_EXPAND) && + if ((png_ptr->transformations & PNG_SHIFT) != 0 && + (png_ptr->transformations & PNG_EXPAND) == 0 && (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)) { int i; @@ -1851,33 +1886,36 @@ png_init_read_transformations(png_structp png_ptr) * the number of significant bits is 0 then no shift is done (this is an * error condition which is silently ignored.) */ - if (shift > 0 && shift < 8) for (i=0; i<istop; ++i) - { - int component = png_ptr->palette[i].red; + if (shift > 0 && shift < 8) + for (i=0; i<istop; ++i) + { + int component = png_ptr->palette[i].red; - component >>= shift; - png_ptr->palette[i].red = (png_byte)component; - } + component >>= shift; + png_ptr->palette[i].red = (png_byte)component; + } shift = 8 - png_ptr->sig_bit.green; - if (shift > 0 && shift < 8) for (i=0; i<istop; ++i) - { - int component = png_ptr->palette[i].green; + if (shift > 0 && shift < 8) + for (i=0; i<istop; ++i) + { + int component = png_ptr->palette[i].green; - component >>= shift; - png_ptr->palette[i].green = (png_byte)component; - } + component >>= shift; + png_ptr->palette[i].green = (png_byte)component; + } shift = 8 - png_ptr->sig_bit.blue; - if (shift > 0 && shift < 8) for (i=0; i<istop; ++i) - { - int component = png_ptr->palette[i].blue; + if (shift > 0 && shift < 8) + for (i=0; i<istop; ++i) + { + int component = png_ptr->palette[i].blue; - component >>= shift; - png_ptr->palette[i].blue = (png_byte)component; - } + component >>= shift; + png_ptr->palette[i].blue = (png_byte)component; + } } -#endif /* PNG_READ_SHIFT_SUPPORTED */ +#endif /* READ_SHIFT */ } /* Modify the info structure to reflect the transformations. The @@ -1885,12 +1923,12 @@ png_init_read_transformations(png_structp png_ptr) * assuming the transformations result in valid PNG data. */ void /* PRIVATE */ -png_read_transform_info(png_structp png_ptr, png_infop info_ptr) +png_read_transform_info(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_read_transform_info"); #ifdef PNG_READ_EXPAND_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND) + if ((png_ptr->transformations & PNG_EXPAND) != 0) { if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { @@ -1912,9 +1950,9 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) } else { - if (png_ptr->num_trans) + if (png_ptr->num_trans != 0) { - if (png_ptr->transformations & PNG_EXPAND_tRNS) + if ((png_ptr->transformations & PNG_EXPAND_tRNS) != 0) info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; } if (info_ptr->bit_depth < 8) @@ -1930,7 +1968,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) /* The following is almost certainly wrong unless the background value is in * the screen space! */ - if (png_ptr->transformations & PNG_COMPOSE) + if ((png_ptr->transformations & PNG_COMPOSE) != 0) info_ptr->background = png_ptr->background; #endif @@ -1939,25 +1977,29 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) * however it seems that the code in png_init_read_transformations, which has * been called before this from png_read_update_info->png_read_start_row * sometimes does the gamma transform and cancels the flag. + * + * TODO: this looks wrong; the info_ptr should end up with a gamma equal to + * the screen_gamma value. The following probably results in weirdness if + * the info_ptr is used by the app after the rows have been read. */ - info_ptr->gamma = png_ptr->gamma; + info_ptr->colorspace.gamma = png_ptr->colorspace.gamma; #endif if (info_ptr->bit_depth == 16) { # ifdef PNG_READ_16BIT_SUPPORTED # ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - if (png_ptr->transformations & PNG_SCALE_16_TO_8) + if ((png_ptr->transformations & PNG_SCALE_16_TO_8) != 0) info_ptr->bit_depth = 8; # endif # ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED - if (png_ptr->transformations & PNG_16_TO_8) + if ((png_ptr->transformations & PNG_16_TO_8) != 0) info_ptr->bit_depth = 8; # endif # else - /* No 16 bit support: force chopping 16-bit input down to 8, in this case + /* No 16-bit support: force chopping 16-bit input down to 8, in this case * the app program can chose if both APIs are available by setting the * correct scaling to use. */ @@ -1978,27 +2020,27 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) CONFIGURATION ERROR: you must enable at least one 16 to 8 method # endif # endif -#endif /* !READ_16BIT_SUPPORTED */ +#endif /* !READ_16BIT */ } #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - if (png_ptr->transformations & PNG_GRAY_TO_RGB) + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) != 0) info_ptr->color_type = (png_byte)(info_ptr->color_type | PNG_COLOR_MASK_COLOR); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - if (png_ptr->transformations & PNG_RGB_TO_GRAY) + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) != 0) info_ptr->color_type = (png_byte)(info_ptr->color_type & ~PNG_COLOR_MASK_COLOR); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED - if (png_ptr->transformations & PNG_QUANTIZE) + if ((png_ptr->transformations & PNG_QUANTIZE) != 0) { if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) || (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) && - png_ptr->palette_lookup && info_ptr->bit_depth == 8) + png_ptr->palette_lookup != 0 && info_ptr->bit_depth == 8) { info_ptr->color_type = PNG_COLOR_TYPE_PALETTE; } @@ -2006,29 +2048,31 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_READ_EXPAND_16_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND_16 && info_ptr->bit_depth == 8 && - info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) + if ((png_ptr->transformations & PNG_EXPAND_16) != 0 && + info_ptr->bit_depth == 8 && + info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) { info_ptr->bit_depth = 16; } #endif #ifdef PNG_READ_PACK_SUPPORTED - if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8)) + if ((png_ptr->transformations & PNG_PACK) != 0 && + (info_ptr->bit_depth < 8)) info_ptr->bit_depth = 8; #endif if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) info_ptr->channels = 1; - else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) + else if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) info_ptr->channels = 3; else info_ptr->channels = 1; #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_STRIP_ALPHA) + if ((png_ptr->transformations & PNG_STRIP_ALPHA) != 0) { info_ptr->color_type = (png_byte)(info_ptr->color_type & ~PNG_COLOR_MASK_ALPHA); @@ -2036,30 +2080,30 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr) } #endif - if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) + if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0) info_ptr->channels++; #ifdef PNG_READ_FILLER_SUPPORTED /* STRIP_ALPHA and FILLER allowed: MASK_ALPHA bit stripped above */ - if ((png_ptr->transformations & PNG_FILLER) && - ((info_ptr->color_type == PNG_COLOR_TYPE_RGB) || - (info_ptr->color_type == PNG_COLOR_TYPE_GRAY))) + if ((png_ptr->transformations & PNG_FILLER) != 0 && + (info_ptr->color_type == PNG_COLOR_TYPE_RGB || + info_ptr->color_type == PNG_COLOR_TYPE_GRAY)) { info_ptr->channels++; /* If adding a true alpha channel not just filler */ - if (png_ptr->transformations & PNG_ADD_ALPHA) + if ((png_ptr->transformations & PNG_ADD_ALPHA) != 0) info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; } #endif #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \ defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - if (png_ptr->transformations & PNG_USER_TRANSFORM) + if ((png_ptr->transformations & PNG_USER_TRANSFORM) != 0) { - if (png_ptr->user_transform_depth) + if (png_ptr->user_transform_depth != 0) info_ptr->bit_depth = png_ptr->user_transform_depth; - if (png_ptr->user_transform_channels) + if (png_ptr->user_transform_channels != 0) info_ptr->channels = png_ptr->user_transform_channels; } #endif @@ -2083,302 +2127,6 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED) #endif } -/* Transform the row. The order of transformations is significant, - * and is very touchy. If you add a transformation, take care to - * decide how it fits in with the other transformations here. - */ -void /* PRIVATE */ -png_do_read_transformations(png_structp png_ptr, png_row_infop row_info) -{ - png_debug(1, "in png_do_read_transformations"); - - if (png_ptr->row_buf == NULL) - { - /* Prior to 1.5.4 this output row/pass where the NULL pointer is, but this - * error is incredibly rare and incredibly easy to debug without this - * information. - */ - png_error(png_ptr, "NULL row buffer"); - } - - /* The following is debugging; prior to 1.5.4 the code was never compiled in; - * in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro - * PNG_WARN_UNINITIALIZED_ROW removed. In 1.5 the new flag is set only for - * selected new APIs to ensure that there is no API change. - */ - if ((png_ptr->flags & PNG_FLAG_DETECT_UNINITIALIZED) != 0 && - !(png_ptr->flags & PNG_FLAG_ROW_INIT)) - { - /* Application has failed to call either png_read_start_image() or - * png_read_update_info() after setting transforms that expand pixels. - * This check added to libpng-1.2.19 (but not enabled until 1.5.4). - */ - png_error(png_ptr, "Uninitialized row"); - } - -#ifdef PNG_READ_EXPAND_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND) - { - if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_do_expand_palette(row_info, png_ptr->row_buf + 1, - png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); - } - - else - { - if (png_ptr->num_trans && - (png_ptr->transformations & PNG_EXPAND_tRNS)) - png_do_expand(row_info, png_ptr->row_buf + 1, - &(png_ptr->trans_color)); - - else - png_do_expand(row_info, png_ptr->row_buf + 1, - NULL); - } - } -#endif - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if ((png_ptr->transformations & PNG_STRIP_ALPHA) && - !(png_ptr->transformations & PNG_COMPOSE) && - (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || - row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) - png_do_strip_channel(row_info, png_ptr->row_buf + 1, - 0 /* at_start == false, because SWAP_ALPHA happens later */); -#endif - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - if (png_ptr->transformations & PNG_RGB_TO_GRAY) - { - int rgb_error = - png_do_rgb_to_gray(png_ptr, row_info, - png_ptr->row_buf + 1); - - if (rgb_error != 0) - { - png_ptr->rgb_to_gray_status=1; - if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == - PNG_RGB_TO_GRAY_WARN) - png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - - if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == - PNG_RGB_TO_GRAY_ERR) - png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - } - } -#endif - -/* From Andreas Dilger e-mail to png-implement, 26 March 1998: - * - * In most cases, the "simple transparency" should be done prior to doing - * gray-to-RGB, or you will have to test 3x as many bytes to check if a - * pixel is transparent. You would also need to make sure that the - * transparency information is upgraded to RGB. - * - * To summarize, the current flow is: - * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite - * with background "in place" if transparent, - * convert to RGB if necessary - * - Gray + alpha -> composite with gray background and remove alpha bytes, - * convert to RGB if necessary - * - * To support RGB backgrounds for gray images we need: - * - Gray + simple transparency -> convert to RGB + simple transparency, - * compare 3 or 6 bytes and composite with - * background "in place" if transparent - * (3x compare/pixel compared to doing - * composite with gray bkgrnd) - * - Gray + alpha -> convert to RGB + alpha, composite with background and - * remove alpha bytes (3x float - * operations/pixel compared with composite - * on gray background) - * - * Greg's change will do this. The reason it wasn't done before is for - * performance, as this increases the per-pixel operations. If we would check - * in advance if the background was gray or RGB, and position the gray-to-RGB - * transform appropriately, then it would save a lot of work/time. - */ - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* If gray -> RGB, do so now only if background is non-gray; else do later - * for performance reasons - */ - if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && - !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) - if (png_ptr->transformations & PNG_COMPOSE) - png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED - if ((png_ptr->transformations & PNG_GAMMA) && -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Because RGB_TO_GRAY does the gamma transform. */ - !(png_ptr->transformations & PNG_RGB_TO_GRAY) && -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) - /* Because PNG_COMPOSE does the gamma transform if there is something to - * do (if there is an alpha channel or transparency.) - */ - !((png_ptr->transformations & PNG_COMPOSE) && - ((png_ptr->num_trans != 0) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) && -#endif - /* Because png_init_read_transformations transforms the palette, unless - * RGB_TO_GRAY will do the transform. - */ - (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) - png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr); -#endif - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if ((png_ptr->transformations & PNG_STRIP_ALPHA) && - (png_ptr->transformations & PNG_COMPOSE) && - (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || - row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) - png_do_strip_channel(row_info, png_ptr->row_buf + 1, - 0 /* at_start == false, because SWAP_ALPHA happens later */); -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - if ((png_ptr->transformations & PNG_ENCODE_ALPHA) && - (row_info->color_type & PNG_COLOR_MASK_ALPHA)) - png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr); -#endif - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - if (png_ptr->transformations & PNG_SCALE_16_TO_8) - png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED - /* There is no harm in doing both of these because only one has any effect, - * by putting the 'scale' option first if the app asks for scale (either by - * calling the API or in a TRANSFORM flag) this is what happens. - */ - if (png_ptr->transformations & PNG_16_TO_8) - png_do_chop(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_QUANTIZE_SUPPORTED - if (png_ptr->transformations & PNG_QUANTIZE) - { - png_do_quantize(row_info, png_ptr->row_buf + 1, - png_ptr->palette_lookup, png_ptr->quantize_index); - - if (row_info->rowbytes == 0) - png_error(png_ptr, "png_do_quantize returned rowbytes=0"); - } -#endif /* PNG_READ_QUANTIZE_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_16_SUPPORTED - /* Do the expansion now, after all the arithmetic has been done. Notice - * that previous transformations can handle the PNG_EXPAND_16 flag if this - * is efficient (particularly true in the case of gamma correction, where - * better accuracy results faster!) - */ - if (png_ptr->transformations & PNG_EXPAND_16) - png_do_expand_16(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* NOTE: moved here in 1.5.4 (from much later in this list.) */ - if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && - (png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_INVERT_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_SHIFT_SUPPORTED - if (png_ptr->transformations & PNG_SHIFT) - png_do_unshift(row_info, png_ptr->row_buf + 1, - &(png_ptr->shift)); -#endif - -#ifdef PNG_READ_PACK_SUPPORTED - if (png_ptr->transformations & PNG_PACK) - png_do_unpack(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED - /* Added at libpng-1.5.10 */ - if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && - png_ptr->num_palette_max >= 0) - png_do_check_palette_indexes(png_ptr, row_info); -#endif - -#ifdef PNG_READ_BGR_SUPPORTED - if (png_ptr->transformations & PNG_BGR) - png_do_bgr(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_FILLER_SUPPORTED - if (png_ptr->transformations & PNG_FILLER) - png_do_read_filler(row_info, png_ptr->row_buf + 1, - (png_uint_32)png_ptr->filler, png_ptr->flags); -#endif - -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_16BIT_SUPPORTED -#ifdef PNG_READ_SWAP_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(row_info, png_ptr->row_buf + 1); -#endif -#endif - -#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED - if (png_ptr->transformations & PNG_USER_TRANSFORM) - { - if (png_ptr->read_user_transform_fn != NULL) - (*(png_ptr->read_user_transform_fn)) /* User read transform function */ - (png_ptr, /* png_ptr */ - row_info, /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_size_t rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ -#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED - if (png_ptr->user_transform_depth) - row_info->bit_depth = png_ptr->user_transform_depth; - - if (png_ptr->user_transform_channels) - row_info->channels = png_ptr->user_transform_channels; -#endif - row_info->pixel_depth = (png_byte)(row_info->bit_depth * - row_info->channels); - - row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width); - } -#endif -} - #ifdef PNG_READ_PACK_SUPPORTED /* Unpack pixels of 1, 2, or 4 bits per pixel into 1 byte per pixel, * without changing the actual values. Thus, if you had a row with @@ -2386,7 +2134,7 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info) * the numbers 0 or 1. If you would rather they contain 0 and 255, use * png_do_shift() after this. */ -void /* PRIVATE */ +static void png_do_unpack(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_unpack"); @@ -2484,7 +2232,7 @@ png_do_unpack(png_row_infop row_info, png_bytep row) * a row of bit depth 8, but only 5 are significant, this will shift * the values back to 0 through 31. */ -void /* PRIVATE */ +static void png_do_unshift(png_row_infop row_info, png_bytep row, png_const_color_8p sig_bits) { @@ -2501,7 +2249,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, int channels = 0; int bit_depth = row_info->bit_depth; - if (color_type & PNG_COLOR_MASK_COLOR) + if ((color_type & PNG_COLOR_MASK_COLOR) != 0) { shift[channels++] = bit_depth - sig_bits->red; shift[channels++] = bit_depth - sig_bits->green; @@ -2513,7 +2261,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, shift[channels++] = bit_depth - sig_bits->gray; } - if (color_type & PNG_COLOR_MASK_ALPHA) + if ((color_type & PNG_COLOR_MASK_ALPHA) != 0) { shift[channels++] = bit_depth - sig_bits->alpha; } @@ -2611,7 +2359,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, if (++channel >= channels) channel = 0; *bp++ = (png_byte)(value >> 8); - *bp++ = (png_byte)(value & 0xff); + *bp++ = (png_byte)value; } break; } @@ -2623,7 +2371,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* Scale rows of bit depth 16 down to 8 accurately */ -void /* PRIVATE */ +static void png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_scale_16_to_8"); @@ -2636,8 +2384,8 @@ png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) while (sp < ep) { - /* The input is an array of 16 bit components, these must be scaled to - * 8 bits each. For a 16 bit value V the required value (from the PNG + /* The input is an array of 16-bit components, these must be scaled to + * 8 bits each. For a 16-bit value V the required value (from the PNG * specification) is: * * (V * 255) / 65535 @@ -2658,7 +2406,7 @@ png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) * * The approximate differs from the exact answer only when (vlo-vhi) is * 128; it then gives a correction of +1 when the exact correction is - * 0. This gives 128 errors. The exact answer (correct for all 16 bit + * 0. This gives 128 errors. The exact answer (correct for all 16-bit * input values) is: * * error = (vlo-vhi+128)*65535 >> 24; @@ -2681,7 +2429,7 @@ png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED -void /* PRIVATE */ +static void /* Simply discard the low byte. This was the default behavior prior * to libpng-1.5.4. */ @@ -2709,7 +2457,7 @@ png_do_chop(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_read_swap_alpha"); @@ -2806,7 +2554,7 @@ png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) { png_uint_32 row_width; @@ -2908,7 +2656,7 @@ png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) #ifdef PNG_READ_FILLER_SUPPORTED /* Add filler channel if we have RGB color */ -void /* PRIVATE */ +static void png_do_read_filler(png_row_infop row_info, png_bytep row, png_uint_32 filler, png_uint_32 flags) { @@ -2916,9 +2664,9 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, png_uint_32 row_width = row_info->width; #ifdef PNG_READ_16BIT_SUPPORTED - png_byte hi_filler = (png_byte)((filler>>8) & 0xff); + png_byte hi_filler = (png_byte)(filler>>8); #endif - png_byte lo_filler = (png_byte)(filler & 0xff); + png_byte lo_filler = (png_byte)filler; png_debug(1, "in png_do_read_filler"); @@ -2927,7 +2675,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, { if (row_info->bit_depth == 8) { - if (flags & PNG_FLAG_FILLER_AFTER) + if ((flags & PNG_FLAG_FILLER_AFTER) != 0) { /* This changes the data from G to GX */ png_bytep sp = row + (png_size_t)row_width; @@ -2962,7 +2710,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, #ifdef PNG_READ_16BIT_SUPPORTED else if (row_info->bit_depth == 16) { - if (flags & PNG_FLAG_FILLER_AFTER) + if ((flags & PNG_FLAG_FILLER_AFTER) != 0) { /* This changes the data from GG to GGXX */ png_bytep sp = row + (png_size_t)row_width * 2; @@ -3004,7 +2752,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, { if (row_info->bit_depth == 8) { - if (flags & PNG_FLAG_FILLER_AFTER) + if ((flags & PNG_FLAG_FILLER_AFTER) != 0) { /* This changes the data from RGB to RGBX */ png_bytep sp = row + (png_size_t)row_width * 3; @@ -3043,7 +2791,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, #ifdef PNG_READ_16BIT_SUPPORTED else if (row_info->bit_depth == 16) { - if (flags & PNG_FLAG_FILLER_AFTER) + if ((flags & PNG_FLAG_FILLER_AFTER) != 0) { /* This changes the data from RRGGBB to RRGGBBXX */ png_bytep sp = row + (png_size_t)row_width * 6; @@ -3095,7 +2843,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand grayscale files to RGB, with or without alpha */ -void /* PRIVATE */ +static void png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) { png_uint_32 i; @@ -3104,7 +2852,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) png_debug(1, "in png_do_gray_to_rgb"); if (row_info->bit_depth >= 8 && - !(row_info->color_type & PNG_COLOR_MASK_COLOR)) + (row_info->color_type & PNG_COLOR_MASK_COLOR) == 0) { if (row_info->color_type == PNG_COLOR_TYPE_GRAY) { @@ -3234,16 +2982,16 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) * calculated to make the sum 32768. This will result in different rounding * to that used above. */ -int /* PRIVATE */ -png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) +static int +png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row) { int rgb_error = 0; png_debug(1, "in png_do_rgb_to_gray"); - if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) && - (row_info->color_type & PNG_COLOR_MASK_COLOR)) + if ((row_info->color_type & PNG_COLOR_MASK_PALETTE) == 0 && + (row_info->color_type & PNG_COLOR_MASK_COLOR) != 0) { PNG_CONST png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff; PNG_CONST png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff; @@ -3254,7 +3002,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) if (row_info->bit_depth == 8) { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) +#ifdef PNG_READ_GAMMA_SUPPORTED /* Notice that gamma to/from 1 are not necessarily inverses (if * there is an overall gamma correction). Prior to 1.5.5 this code * checked the linearized values for equality; this doesn't match @@ -3331,7 +3079,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) else /* RGB bit_depth == 16 */ { -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) +#ifdef PNG_READ_GAMMA_SUPPORTED if (png_ptr->gamma_16_to_1 != NULL && png_ptr->gamma_16_from_1 != NULL) { png_bytep sp = row; @@ -3341,22 +3089,17 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) for (i = 0; i < row_width; i++) { png_uint_16 red, green, blue, w; -#if 0 /* Coverity doesn't like this */ - red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; - green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; -#else png_byte hi,lo; hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo)); hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo)); hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo)); -#endif + if (red == green && red == blue) { if (png_ptr->gamma_16_table != NULL) - w = png_ptr->gamma_16_table[(red&0xff) - >> png_ptr->gamma_shift][red>>8]; + w = png_ptr->gamma_16_table[(red & 0xff) + >> png_ptr->gamma_shift][red >> 8]; else w = red; @@ -3364,16 +3107,16 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) else { - png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) + png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red & 0xff) >> png_ptr->gamma_shift][red>>8]; png_uint_16 green_1 = - png_ptr->gamma_16_to_1[(green&0xff) >> + png_ptr->gamma_16_to_1[(green & 0xff) >> png_ptr->gamma_shift][green>>8]; - png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) + png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue & 0xff) >> png_ptr->gamma_shift][blue>>8]; png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1 + bc*blue_1 + 16384)>>15); - w = png_ptr->gamma_16_from_1[(gray16&0xff) >> + w = png_ptr->gamma_16_from_1[(gray16 & 0xff) >> png_ptr->gamma_shift][gray16 >> 8]; rgb_error |= 1; } @@ -3398,21 +3141,22 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) for (i = 0; i < row_width; i++) { png_uint_16 red, green, blue, gray16; + png_byte hi,lo; - red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; - green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; - blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo)); + hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo)); + hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo)); if (red != green || red != blue) rgb_error |= 1; - /* From 1.5.5 in the 16 bit case do the accurate conversion even + /* From 1.5.5 in the 16-bit case do the accurate conversion even * in the 'fast' case - this is because this is where the code - * ends up when handling linear 16 bit data. + * ends up when handling linear 16-bit data. */ gray16 = (png_uint_16)((rc*red + gc*green + bc*blue + 16384) >> 15); - *(dp++) = (png_byte)((gray16>>8) & 0xff); + *(dp++) = (png_byte)((gray16 >> 8) & 0xff); *(dp++) = (png_byte)(gray16 & 0xff); if (have_alpha != 0) @@ -3434,74 +3178,15 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) return rgb_error; } #endif -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED -/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth - * large of png_color. This lets grayscale images be treated as - * paletted. Most useful for gamma correction and simplification - * of code. This API is not used internally. - */ -void PNGAPI -png_build_grayscale_palette(int bit_depth, png_colorp palette) -{ - int num_palette; - int color_inc; - int i; - int v; - - png_debug(1, "in png_do_build_grayscale_palette"); - - if (palette == NULL) - return; - switch (bit_depth) - { - case 1: - num_palette = 2; - color_inc = 0xff; - break; - - case 2: - num_palette = 4; - color_inc = 0x55; - break; - - case 4: - num_palette = 16; - color_inc = 0x11; - break; - - case 8: - num_palette = 256; - color_inc = 1; - break; - - default: - num_palette = 0; - color_inc = 0; - break; - } - - for (i = 0, v = 0; i < num_palette; i++, v += color_inc) - { - palette[i].red = (png_byte)v; - palette[i].green = (png_byte)v; - palette[i].blue = (png_byte)v; - } -} -#endif - - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED #if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ defined(PNG_READ_ALPHA_MODE_SUPPORTED) /* Replace any alpha or transparency with the supplied background color. * "background" is already in the screen gamma, while "background_1" is * at a gamma of 1.0. Paletted files have already been taken care of. */ -void /* PRIVATE */ -png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) +static void +png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { #ifdef PNG_READ_GAMMA_SUPPORTED png_const_bytep gamma_table = png_ptr->gamma_table; @@ -3511,12 +3196,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) png_const_uint_16pp gamma_16_from_1 = png_ptr->gamma_16_from_1; png_const_uint_16pp gamma_16_to_1 = png_ptr->gamma_16_to_1; int gamma_shift = png_ptr->gamma_shift; + int optimize = (png_ptr->flags & PNG_FLAG_OPTIMIZE_ALPHA) != 0; #endif png_bytep sp; png_uint_32 i; png_uint_32 row_width = row_info->width; - int optimize = (png_ptr->flags & PNG_FLAG_OPTIMIZE_ALPHA) != 0; int shift; png_debug(1, "in png_do_compose"); @@ -3537,8 +3222,9 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) if ((png_uint_16)((*sp >> shift) & 0x01) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x7f7f >> (7 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } if (shift == 0) @@ -3565,17 +3251,19 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) if ((png_uint_16)((*sp >> shift) & 0x03) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x3f3f >> (6 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } else { - png_byte p = (png_byte)((*sp >> shift) & 0x03); - png_byte g = (png_byte)((gamma_table [p | (p << 2) | - (p << 4) | (p << 6)] >> 6) & 0x03); - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); + unsigned int p = (*sp >> shift) & 0x03; + unsigned int g = (gamma_table [p | (p << 2) | + (p << 4) | (p << 6)] >> 6) & 0x03; + unsigned int tmp = *sp & (0x3f3f >> (6 - shift)); + tmp |= g << shift; + *sp = (png_byte)(tmp & 0xff); } if (shift == 0) @@ -3599,8 +3287,9 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) if ((png_uint_16)((*sp >> shift) & 0x03) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x3f3f >> (6 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } if (shift == 0) @@ -3628,17 +3317,19 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) if ((png_uint_16)((*sp >> shift) & 0x0f) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x0f0f >> (4 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } else { - png_byte p = (png_byte)((*sp >> shift) & 0x0f); - png_byte g = (png_byte)((gamma_table[p | - (p << 4)] >> 4) & 0x0f); - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); + unsigned int p = (*sp >> shift) & 0x0f; + unsigned int g = (gamma_table[p | (p << 4)] >> 4) & + 0x0f; + unsigned int tmp = *sp & (0x0f0f >> (4 - shift)); + tmp |= g << shift; + *sp = (png_byte)(tmp & 0xff); } if (shift == 0) @@ -3662,8 +3353,9 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) if ((png_uint_16)((*sp >> shift) & 0x0f) == png_ptr->trans_color.gray) { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(png_ptr->background.gray << shift); + unsigned int tmp = *sp & (0x0f0f >> (4 - shift)); + tmp |= png_ptr->background.gray << shift; + *sp = (png_byte)(tmp & 0xff); } if (shift == 0) @@ -3979,7 +3671,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) if (optimize != 0) w = v; else - w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8]; + w = gamma_16_from_1[(v & 0xff) >> + gamma_shift][v >> 8]; *sp = (png_byte)((w >> 8) & 0xff); *(sp + 1) = (png_byte)(w & 0xff); } @@ -4143,16 +3836,16 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; png_composite_16(w, v, a, png_ptr->background_1.red); if (optimize == 0) - w = gamma_16_from_1[((w&0xff) >> gamma_shift)] - [w >> 8]; + w = gamma_16_from_1[((w & 0xff) >> gamma_shift)][w >> + 8]; *sp = (png_byte)((w >> 8) & 0xff); *(sp + 1) = (png_byte)(w & 0xff); v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)]; png_composite_16(w, v, a, png_ptr->background_1.green); if (optimize == 0) - w = gamma_16_from_1[((w&0xff) >> gamma_shift)] - [w >> 8]; + w = gamma_16_from_1[((w & 0xff) >> gamma_shift)][w >> + 8]; *(sp + 2) = (png_byte)((w >> 8) & 0xff); *(sp + 3) = (png_byte)(w & 0xff); @@ -4160,8 +3853,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)]; png_composite_16(w, v, a, png_ptr->background_1.blue); if (optimize == 0) - w = gamma_16_from_1[((w&0xff) >> gamma_shift)] - [w >> 8]; + w = gamma_16_from_1[((w & 0xff) >> gamma_shift)][w >> + 8]; *(sp + 4) = (png_byte)((w >> 8) & 0xff); *(sp + 5) = (png_byte)(w & 0xff); @@ -4224,7 +3917,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) } } } -#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_READ_ALPHA_MODE_SUPPORTED */ +#endif /* READ_BACKGROUND || READ_ALPHA_MODE */ #ifdef PNG_READ_GAMMA_SUPPORTED /* Gamma correct the image, avoiding the alpha channel. Make sure @@ -4233,8 +3926,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) * is 16, use gamma_16_table and gamma_shift. Build these with * build_gamma_table(). */ -void /* PRIVATE */ -png_do_gamma(png_row_infop row_info, png_bytep row, png_structp png_ptr) +static void +png_do_gamma(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { png_const_bytep gamma_table = png_ptr->gamma_table; png_const_uint_16pp gamma_16_table = png_ptr->gamma_16_table; @@ -4434,14 +4127,14 @@ png_do_gamma(png_row_infop row_info, png_bytep row, png_structp png_ptr) * linear.) Called only with color types that have an alpha channel. Needs the * from_1 tables. */ -void /* PRIVATE */ -png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structp png_ptr) +static void +png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { png_uint_32 row_width = row_info->width; png_debug(1, "in png_do_encode_alpha"); - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) + if ((row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0) { if (row_info->bit_depth == 8) { @@ -4500,7 +4193,7 @@ png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structp png_ptr) /* Expands a palette row to an RGB or RGBA row depending * upon whether you supply trans and num_trans. */ -void /* PRIVATE */ +static void png_do_expand_palette(png_row_infop row_info, png_bytep row, png_const_colorp palette, png_const_bytep trans_alpha, int num_trans) { @@ -4653,7 +4346,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, /* If the bit depth < 8, it is expanded to 8. Also, if the already * expanded transparency value is supplied, an alpha channel is built. */ -void /* PRIVATE */ +static void png_do_expand(png_row_infop row_info, png_bytep row, png_const_color_16p trans_color) { @@ -4667,7 +4360,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, { if (row_info->color_type == PNG_COLOR_TYPE_GRAY) { - png_uint_16 gray = (png_uint_16)(trans_color ? trans_color->gray : 0); + unsigned int gray = trans_color != NULL ? trans_color->gray : 0; if (row_info->bit_depth < 8) { @@ -4675,7 +4368,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, { case 1: { - gray = (png_uint_16)((gray & 0x01) * 0xff); + gray = (gray & 0x01) * 0xff; sp = row + (png_size_t)((row_width - 1) >> 3); dp = row + (png_size_t)row_width - 1; shift = 7 - (int)((row_width + 7) & 0x07); @@ -4703,7 +4396,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, case 2: { - gray = (png_uint_16)((gray & 0x03) * 0x55); + gray = (gray & 0x03) * 0x55; sp = row + (png_size_t)((row_width - 1) >> 2); dp = row + (png_size_t)row_width - 1; shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); @@ -4728,7 +4421,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, case 4: { - gray = (png_uint_16)((gray & 0x0f) * 0x11); + gray = (gray & 0x0f) * 0x11; sp = row + (png_size_t)((row_width - 1) >> 1); dp = row + (png_size_t)row_width - 1; shift = (int)((1 - ((row_width + 1) & 0x01)) << 2); @@ -4763,15 +4456,13 @@ png_do_expand(png_row_infop row_info, png_bytep row, { if (row_info->bit_depth == 8) { - /* NOTE: prior to libpng 1.5.14 this cleared out the top bits of - * 'gray', however if those are set it is an error. - */ + gray = gray & 0xff; sp = row + (png_size_t)row_width - 1; dp = row + (png_size_t)(row_width << 1) - 1; for (i = 0; i < row_width; i++) { - if (*sp == gray) + if ((*sp & 0xffU) == gray) *dp-- = 0; else @@ -4783,13 +4474,14 @@ png_do_expand(png_row_infop row_info, png_bytep row, else if (row_info->bit_depth == 16) { - png_byte gray_high = (png_byte)((gray >> 8) & 0xff); - png_byte gray_low = (png_byte)(gray & 0xff); + unsigned int gray_high = (gray >> 8) & 0xff; + unsigned int gray_low = gray & 0xff; sp = row + row_info->rowbytes - 1; dp = row + (row_info->rowbytes << 1) - 1; for (i = 0; i < row_width; i++) { - if (*(sp - 1) == gray_high && *(sp) == gray_low) + if ((*(sp - 1) & 0xffU) == gray_high && + (*(sp) & 0xffU) == gray_low) { *dp-- = 0; *dp-- = 0; @@ -4813,7 +4505,8 @@ png_do_expand(png_row_infop row_info, png_bytep row, row_width); } } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_color) + else if (row_info->color_type == PNG_COLOR_TYPE_RGB && + trans_color != NULL) { if (row_info->bit_depth == 8) { @@ -4885,7 +4578,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, /* If the bit depth is 8 and the color type is not a palette type expand the * whole row to 16 bits. Has no effect otherwise. */ -void /* PRIVATE */ +static void png_do_expand_16(png_row_infop row_info, png_bytep row) { if (row_info->bit_depth == 8 && @@ -4913,7 +4606,7 @@ png_do_expand_16(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED -void /* PRIVATE */ +static void png_do_quantize(png_row_infop row_info, png_bytep row, png_const_bytep palette_lookup, png_const_bytep quantize_lookup) { @@ -5004,70 +4697,304 @@ png_do_quantize(png_row_infop row_info, png_bytep row, } } } -#endif /* PNG_READ_QUANTIZE_SUPPORTED */ -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ +#endif /* READ_QUANTIZE */ -#ifdef PNG_MNG_FEATURES_SUPPORTED -/* Undoes intrapixel differencing */ +/* Transform the row. The order of transformations is significant, + * and is very touchy. If you add a transformation, take care to + * decide how it fits in with the other transformations here. + */ void /* PRIVATE */ -png_do_read_intrapixel(png_row_infop row_info, png_bytep row) +png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info) { - png_debug(1, "in png_do_read_intrapixel"); + png_debug(1, "in png_do_read_transformations"); - if ( - (row_info->color_type & PNG_COLOR_MASK_COLOR)) + if (png_ptr->row_buf == NULL) { - int bytes_per_pixel; - png_uint_32 row_width = row_info->width; + /* Prior to 1.5.4 this output row/pass where the NULL pointer is, but this + * error is incredibly rare and incredibly easy to debug without this + * information. + */ + png_error(png_ptr, "NULL row buffer"); + } - if (row_info->bit_depth == 8) - { - png_bytep rp; - png_uint_32 i; + /* The following is debugging; prior to 1.5.4 the code was never compiled in; + * in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro + * PNG_WARN_UNINITIALIZED_ROW removed. In 1.6 the new flag is set only for + * all transformations, however in practice the ROW_INIT always gets done on + * demand, if necessary. + */ + if ((png_ptr->flags & PNG_FLAG_DETECT_UNINITIALIZED) != 0 && + (png_ptr->flags & PNG_FLAG_ROW_INIT) == 0) + { + /* Application has failed to call either png_read_start_image() or + * png_read_update_info() after setting transforms that expand pixels. + * This check added to libpng-1.2.19 (but not enabled until 1.5.4). + */ + png_error(png_ptr, "Uninitialized row"); + } - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 3; +#ifdef PNG_READ_EXPAND_SUPPORTED + if ((png_ptr->transformations & PNG_EXPAND) != 0) + { + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) + { + png_do_expand_palette(row_info, png_ptr->row_buf + 1, + png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); + } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 4; + else + { + if (png_ptr->num_trans != 0 && + (png_ptr->transformations & PNG_EXPAND_tRNS) != 0) + png_do_expand(row_info, png_ptr->row_buf + 1, + &(png_ptr->trans_color)); else - return; - - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff); - *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff); - } + png_do_expand(row_info, png_ptr->row_buf + 1, + NULL); } - else if (row_info->bit_depth == 16) - { - png_bytep rp; - png_uint_32 i; + } +#endif - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 6; +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) != 0 && + (png_ptr->transformations & PNG_COMPOSE) == 0 && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); +#endif - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 8; +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) != 0) + { + int rgb_error = + png_do_rgb_to_gray(png_ptr, row_info, + png_ptr->row_buf + 1); - else - return; + if (rgb_error != 0) + { + png_ptr->rgb_to_gray_status=1; + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == + PNG_RGB_TO_GRAY_WARN) + png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); - png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); - png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); - png_uint_32 red = (s0 + s1 + 65536) & 0xffff; - png_uint_32 blue = (s2 + s1 + 65536) & 0xffff; - *(rp ) = (png_byte)((red >> 8) & 0xff); - *(rp + 1) = (png_byte)(red & 0xff); - *(rp + 4) = (png_byte)((blue >> 8) & 0xff); - *(rp + 5) = (png_byte)(blue & 0xff); - } + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == + PNG_RGB_TO_GRAY_ERR) + png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel"); } } +#endif + +/* From Andreas Dilger e-mail to png-implement, 26 March 1998: + * + * In most cases, the "simple transparency" should be done prior to doing + * gray-to-RGB, or you will have to test 3x as many bytes to check if a + * pixel is transparent. You would also need to make sure that the + * transparency information is upgraded to RGB. + * + * To summarize, the current flow is: + * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite + * with background "in place" if transparent, + * convert to RGB if necessary + * - Gray + alpha -> composite with gray background and remove alpha bytes, + * convert to RGB if necessary + * + * To support RGB backgrounds for gray images we need: + * - Gray + simple transparency -> convert to RGB + simple transparency, + * compare 3 or 6 bytes and composite with + * background "in place" if transparent + * (3x compare/pixel compared to doing + * composite with gray bkgrnd) + * - Gray + alpha -> convert to RGB + alpha, composite with background and + * remove alpha bytes (3x float + * operations/pixel compared with composite + * on gray background) + * + * Greg's change will do this. The reason it wasn't done before is for + * performance, as this increases the per-pixel operations. If we would check + * in advance if the background was gray or RGB, and position the gray-to-RGB + * transform appropriately, then it would save a lot of work/time. + */ + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /* If gray -> RGB, do so now only if background is non-gray; else do later + * for performance reasons + */ + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) != 0 && + (png_ptr->mode & PNG_BACKGROUND_IS_GRAY) == 0) + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); +#endif + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + if ((png_ptr->transformations & PNG_COMPOSE) != 0) + png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED + if ((png_ptr->transformations & PNG_GAMMA) != 0 && +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Because RGB_TO_GRAY does the gamma transform. */ + (png_ptr->transformations & PNG_RGB_TO_GRAY) == 0 && +#endif +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + /* Because PNG_COMPOSE does the gamma transform if there is something to + * do (if there is an alpha channel or transparency.) + */ + !((png_ptr->transformations & PNG_COMPOSE) != 0 && + ((png_ptr->num_trans != 0) || + (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0)) && +#endif + /* Because png_init_read_transformations transforms the palette, unless + * RGB_TO_GRAY will do the transform. + */ + (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) + png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) != 0 && + (png_ptr->transformations & PNG_COMPOSE) != 0 && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + if ((png_ptr->transformations & PNG_ENCODE_ALPHA) != 0 && + (row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0) + png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + if ((png_ptr->transformations & PNG_SCALE_16_TO_8) != 0) + png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* There is no harm in doing both of these because only one has any effect, + * by putting the 'scale' option first if the app asks for scale (either by + * calling the API or in a TRANSFORM flag) this is what happens. + */ + if ((png_ptr->transformations & PNG_16_TO_8) != 0) + png_do_chop(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED + if ((png_ptr->transformations & PNG_QUANTIZE) != 0) + { + png_do_quantize(row_info, png_ptr->row_buf + 1, + png_ptr->palette_lookup, png_ptr->quantize_index); + + if (row_info->rowbytes == 0) + png_error(png_ptr, "png_do_quantize returned rowbytes=0"); + } +#endif /* READ_QUANTIZE */ + +#ifdef PNG_READ_EXPAND_16_SUPPORTED + /* Do the expansion now, after all the arithmetic has been done. Notice + * that previous transformations can handle the PNG_EXPAND_16 flag if this + * is efficient (particularly true in the case of gamma correction, where + * better accuracy results faster!) + */ + if ((png_ptr->transformations & PNG_EXPAND_16) != 0) + png_do_expand_16(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /* NOTE: moved here in 1.5.4 (from much later in this list.) */ + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) != 0 && + (png_ptr->mode & PNG_BACKGROUND_IS_GRAY) != 0) + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_INVERT_SUPPORTED + if ((png_ptr->transformations & PNG_INVERT_MONO) != 0) + png_do_invert(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0) + png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_SHIFT_SUPPORTED + if ((png_ptr->transformations & PNG_SHIFT) != 0) + png_do_unshift(row_info, png_ptr->row_buf + 1, + &(png_ptr->shift)); +#endif + +#ifdef PNG_READ_PACK_SUPPORTED + if ((png_ptr->transformations & PNG_PACK) != 0) + png_do_unpack(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED + /* Added at libpng-1.5.10 */ + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && + png_ptr->num_palette_max >= 0) + png_do_check_palette_indexes(png_ptr, row_info); +#endif + +#ifdef PNG_READ_BGR_SUPPORTED + if ((png_ptr->transformations & PNG_BGR) != 0) + png_do_bgr(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_PACKSWAP_SUPPORTED + if ((png_ptr->transformations & PNG_PACKSWAP) != 0) + png_do_packswap(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_FILLER_SUPPORTED + if ((png_ptr->transformations & PNG_FILLER) != 0) + png_do_read_filler(row_info, png_ptr->row_buf + 1, + (png_uint_32)png_ptr->filler, png_ptr->flags); +#endif + +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_SWAP_ALPHA) != 0) + png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_16BIT_SUPPORTED +#ifdef PNG_READ_SWAP_SUPPORTED + if ((png_ptr->transformations & PNG_SWAP_BYTES) != 0) + png_do_swap(row_info, png_ptr->row_buf + 1); +#endif +#endif + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + if ((png_ptr->transformations & PNG_USER_TRANSFORM) != 0) + { + if (png_ptr->read_user_transform_fn != NULL) + (*(png_ptr->read_user_transform_fn)) /* User read transform function */ + (png_ptr, /* png_ptr */ + row_info, /* row_info: */ + /* png_uint_32 width; width of row */ + /* png_size_t rowbytes; number of bytes in row */ + /* png_byte color_type; color type of pixels */ + /* png_byte bit_depth; bit depth of samples */ + /* png_byte channels; number of channels (1-4) */ + /* png_byte pixel_depth; bits per pixel (depth*channels) */ + png_ptr->row_buf + 1); /* start of pixel data for row */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED + if (png_ptr->user_transform_depth != 0) + row_info->bit_depth = png_ptr->user_transform_depth; + + if (png_ptr->user_transform_channels != 0) + row_info->channels = png_ptr->user_transform_channels; +#endif + row_info->pixel_depth = (png_byte)(row_info->bit_depth * + row_info->channels); + + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width); + } +#endif } -#endif /* PNG_MNG_FEATURES_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED */ + +#endif /* READ_TRANSFORMS */ +#endif /* READ */ diff --git a/drivers/png/pngrutil.c b/drivers/png/pngrutil.c index 6061651fef..c9747fc27d 100644 --- a/drivers/png/pngrutil.c +++ b/drivers/png/pngrutil.c @@ -1,7 +1,7 @@ /* pngrutil.c - utilities to read a PNG file * - * Last changed in libpng 1.5.25 [December 3, 2015] + * Last changed in libpng 1.6.20 [December 3, 2014] * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) @@ -19,7 +19,7 @@ #ifdef PNG_READ_SUPPORTED png_uint_32 PNGAPI -png_get_uint_31(png_structp png_ptr, png_const_bytep buf) +png_get_uint_31(png_const_structrp png_ptr, png_const_bytep buf) { png_uint_32 uval = png_get_uint_32(buf); @@ -38,7 +38,7 @@ png_get_uint_31(png_structp png_ptr, png_const_bytep buf) #define PNG_FIXED_ERROR (-1) static png_fixed_point /* PRIVATE */ -png_get_fixed_point(png_structp png_ptr, png_const_bytep buf) +png_get_fixed_point(png_structrp png_ptr, png_const_bytep buf) { png_uint_32 uval = png_get_uint_32(buf); @@ -104,7 +104,7 @@ png_get_uint_16)(png_const_bytep buf) { /* ANSI-C requires an int value to accomodate at least 16 bits so this * works and allows the compiler not to worry about possible narrowing - * on 32 bit systems. (Pre-ANSI systems did not make integers smaller + * on 32-bit systems. (Pre-ANSI systems did not make integers smaller * than 16 bits either.) */ unsigned int val = @@ -114,11 +114,11 @@ png_get_uint_16)(png_const_bytep buf) return (png_uint_16)val; } -#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */ +#endif /* READ_INT_FUNCTIONS */ /* Read and check the PNG file signature */ void /* PRIVATE */ -png_read_sig(png_structp png_ptr, png_infop info_ptr) +png_read_sig(png_structrp png_ptr, png_inforp info_ptr) { png_size_t num_checked, num_to_check; @@ -137,7 +137,7 @@ png_read_sig(png_structp png_ptr, png_infop info_ptr) png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); png_ptr->sig_bytes = 8; - if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) + if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check) != 0) { if (num_checked < 4 && png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) @@ -153,7 +153,7 @@ png_read_sig(png_structp png_ptr, png_infop info_ptr) * Put the type name into png_ptr->chunk_name, and return the length. */ png_uint_32 /* PRIVATE */ -png_read_chunk_header(png_structp png_ptr) +png_read_chunk_header(png_structrp png_ptr) { png_byte buf[8]; png_uint_32 length; @@ -190,7 +190,7 @@ png_read_chunk_header(png_structp png_ptr) /* Read data, and (optionally) run it through the CRC. */ void /* PRIVATE */ -png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) +png_crc_read(png_structrp png_ptr, png_bytep buf, png_uint_32 length) { if (png_ptr == NULL) return; @@ -200,40 +200,40 @@ png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) } /* Optionally skip data and then check the CRC. Depending on whether we - * are reading a ancillary or critical chunk, and how the program has set + * are reading an ancillary or critical chunk, and how the program has set * things up, we may calculate the CRC on the data and print a message. * Returns '1' if there was a CRC error, '0' otherwise. */ int /* PRIVATE */ -png_crc_finish(png_structp png_ptr, png_uint_32 skip) +png_crc_finish(png_structrp png_ptr, png_uint_32 skip) { - png_size_t i; - png_size_t istop = png_ptr->zbuf_size; - - for (i = (png_size_t)skip; i > istop; i -= istop) + /* The size of the local buffer for inflate is a good guess as to a + * reasonable size to use for buffering reads from the application. + */ + while (skip > 0) { - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } + png_uint_32 len; + png_byte tmpbuf[PNG_INFLATE_BUF_SIZE]; - if (i != 0) - { - png_crc_read(png_ptr, png_ptr->zbuf, i); + len = (sizeof tmpbuf); + if (len > skip) + len = skip; + skip -= len; + + png_crc_read(png_ptr, tmpbuf, len); } - if (png_crc_error(png_ptr)) + if (png_crc_error(png_ptr) != 0) { - if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name) ? - !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) : - (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)) + if (PNG_CHUNK_ANCILLARY(png_ptr->chunk_name) != 0 ? + (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) == 0 : + (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE) != 0) { png_chunk_warning(png_ptr, "CRC error"); } else - { - png_chunk_benign_error(png_ptr, "CRC error"); - return (0); - } + png_chunk_error(png_ptr, "CRC error"); return (1); } @@ -245,13 +245,13 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip) * the data it has read thus far. */ int /* PRIVATE */ -png_crc_error(png_structp png_ptr) +png_crc_error(png_structrp png_ptr) { png_byte crc_bytes[4]; png_uint_32 crc; int need_crc = 1; - if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) + if (PNG_CHUNK_ANCILLARY(png_ptr->chunk_name) != 0) { if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) @@ -260,7 +260,7 @@ png_crc_error(png_structp png_ptr) else /* critical */ { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) + if ((png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) != 0) need_crc = 0; } @@ -281,259 +281,552 @@ png_crc_error(png_structp png_ptr) return (0); } -#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED -static png_size_t -png_inflate(png_structp png_ptr, png_bytep data, png_size_t size, - png_bytep output, png_size_t output_size) +#if defined(PNG_READ_iCCP_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) ||\ + defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_sCAL_SUPPORTED) ||\ + defined(PNG_READ_sPLT_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) ||\ + defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_SEQUENTIAL_READ_SUPPORTED) +/* Manage the read buffer; this simply reallocates the buffer if it is not small + * enough (or if it is not allocated). The routine returns a pointer to the + * buffer; if an error occurs and 'warn' is set the routine returns NULL, else + * it will call png_error (via png_malloc) on failure. (warn == 2 means + * 'silent'). + */ +static png_bytep +png_read_buffer(png_structrp png_ptr, png_alloc_size_t new_size, int warn) { - png_size_t count = 0; + png_bytep buffer = png_ptr->read_buffer; - /* HACK: added in libpng 1.5.18: the progressive reader always leaves - * png_ptr->zstream in a non-reset state. This causes a reset if it needs to - * be used again. This only copes with that one specific error; see libpng - * 1.6 for a better solution. - */ - if ((png_ptr->flags & PNG_FLAG_ZSTREAM_PROGRESSIVE) != 0) + if (buffer != NULL && new_size > png_ptr->read_buffer_size) { - (void)inflateReset(&png_ptr->zstream); - png_ptr->flags &= ~PNG_FLAG_ZSTREAM_PROGRESSIVE; + png_ptr->read_buffer = NULL; + png_ptr->read_buffer = NULL; + png_ptr->read_buffer_size = 0; + png_free(png_ptr, buffer); + buffer = NULL; } - /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't - * even necessarily handle 65536 bytes) because the type uInt is "16 bits or - * more". Consequently it is necessary to chunk the input to zlib. This - * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value - * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a - * lower value in pngpriv.h and this may sometimes have a performance - * advantage, because it forces access of the input data to be separated from - * at least some of the use by some period of time. - */ - png_ptr->zstream.next_in = data; - /* avail_in is set below from 'size' */ - png_ptr->zstream.avail_in = 0; - - while (1) + if (buffer == NULL) { - int ret, avail; + buffer = png_voidcast(png_bytep, png_malloc_base(png_ptr, new_size)); - /* The setting of 'avail_in' used to be outside the loop; by setting it - * inside it is possible to chunk the input to zlib and simply rely on - * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o - * data to be passed through zlib at the unavoidable cost of requiring a - * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX - * input bytes. - */ - if (png_ptr->zstream.avail_in == 0 && size > 0) + if (buffer != NULL) { - if (size <= ZLIB_IO_MAX) - { - /* The value is less than ZLIB_IO_MAX so the cast is safe: */ - png_ptr->zstream.avail_in = (uInt)size; - size = 0; - } + png_ptr->read_buffer = buffer; + png_ptr->read_buffer_size = new_size; + } + + else if (warn < 2) /* else silent */ + { + if (warn != 0) + png_chunk_warning(png_ptr, "insufficient memory to read chunk"); else - { - png_ptr->zstream.avail_in = ZLIB_IO_MAX; - size -= ZLIB_IO_MAX; - } + png_chunk_error(png_ptr, "insufficient memory to read chunk"); } + } - /* Reset the output buffer each time round - we empty it - * after every inflate call. - */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = png_ptr->zbuf_size; + return buffer; +} +#endif /* READ_iCCP|iTXt|pCAL|sCAL|sPLT|tEXt|zTXt|SEQUENTIAL_READ */ - ret = inflate(&png_ptr->zstream, Z_NO_FLUSH); - avail = png_ptr->zbuf_size - png_ptr->zstream.avail_out; +/* png_inflate_claim: claim the zstream for some nefarious purpose that involves + * decompression. Returns Z_OK on success, else a zlib error code. It checks + * the owner but, in final release builds, just issues a warning if some other + * chunk apparently owns the stream. Prior to release it does a png_error. + */ +static int +png_inflate_claim(png_structrp png_ptr, png_uint_32 owner) +{ + if (png_ptr->zowner != 0) + { + char msg[64]; - /* First copy/count any new output - but only if we didn't - * get an error code. + PNG_STRING_FROM_CHUNK(msg, png_ptr->zowner); + /* So the message that results is "<chunk> using zstream"; this is an + * internal error, but is very useful for debugging. i18n requirements + * are minimal. */ - if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0) + (void)png_safecat(msg, (sizeof msg), 4, " using zstream"); +#if PNG_RELEASE_BUILD + png_chunk_warning(png_ptr, msg); + png_ptr->zowner = 0; +#else + png_chunk_error(png_ptr, msg); +#endif + } + + /* Implementation note: unlike 'png_deflate_claim' this internal function + * does not take the size of the data as an argument. Some efficiency could + * be gained by using this when it is known *if* the zlib stream itself does + * not record the number; however, this is an illusion: the original writer + * of the PNG may have selected a lower window size, and we really must + * follow that because, for systems with with limited capabilities, we + * would otherwise reject the application's attempts to use a smaller window + * size (zlib doesn't have an interface to say "this or lower"!). + * + * inflateReset2 was added to zlib 1.2.4; before this the window could not be + * reset, therefore it is necessary to always allocate the maximum window + * size with earlier zlibs just in case later compressed chunks need it. + */ + { + int ret; /* zlib return code */ +#if PNG_ZLIB_VERNUM >= 0x1240 + +# if defined(PNG_SET_OPTION_SUPPORTED) && defined(PNG_MAXIMUM_INFLATE_WINDOW) + int window_bits; + + if (((png_ptr->options >> PNG_MAXIMUM_INFLATE_WINDOW) & 3) == + PNG_OPTION_ON) { - png_size_t space = avail; /* > 0, see above */ + window_bits = 15; + png_ptr->zstream_start = 0; /* fixed window size */ + } - if (output != 0 && output_size > count) - { - png_size_t copy = output_size - count; + else + { + window_bits = 0; + png_ptr->zstream_start = 1; + } +# else +# define window_bits 0 +# endif +#endif - if (space < copy) - copy = space; + /* Set this for safety, just in case the previous owner left pointers to + * memory allocations. + */ + png_ptr->zstream.next_in = NULL; + png_ptr->zstream.avail_in = 0; + png_ptr->zstream.next_out = NULL; + png_ptr->zstream.avail_out = 0; - png_memcpy(output + count, png_ptr->zbuf, copy); - } - count += space; + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0) + { +#if PNG_ZLIB_VERNUM < 0x1240 + ret = inflateReset(&png_ptr->zstream); +#else + ret = inflateReset2(&png_ptr->zstream, window_bits); +#endif + } + + else + { +#if PNG_ZLIB_VERNUM < 0x1240 + ret = inflateInit(&png_ptr->zstream); +#else + ret = inflateInit2(&png_ptr->zstream, window_bits); +#endif + + if (ret == Z_OK) + png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED; } if (ret == Z_OK) - continue; + png_ptr->zowner = owner; + + else + png_zstream_error(png_ptr, ret); + + return ret; + } + +#ifdef window_bits +# undef window_bits +#endif +} + +#if PNG_ZLIB_VERNUM >= 0x1240 +/* Handle the start of the inflate stream if we called inflateInit2(strm,0); + * in this case some zlib versions skip validation of the CINFO field and, in + * certain circumstances, libpng may end up displaying an invalid image, in + * contrast to implementations that call zlib in the normal way (e.g. libpng + * 1.5). + */ +int /* PRIVATE */ +png_zlib_inflate(png_structrp png_ptr, int flush) +{ + if (png_ptr->zstream_start && png_ptr->zstream.avail_in > 0) + { + if ((*png_ptr->zstream.next_in >> 4) > 7) + { + png_ptr->zstream.msg = "invalid window size (libpng)"; + return Z_DATA_ERROR; + } + + png_ptr->zstream_start = 0; + } + + return inflate(&png_ptr->zstream, flush); +} +#endif /* Zlib >= 1.2.4 */ - /* Termination conditions - always reset the zstream, it - * must be left in inflateInit state. +#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED +/* png_inflate now returns zlib error codes including Z_OK and Z_STREAM_END to + * allow the caller to do multiple calls if required. If the 'finish' flag is + * set Z_FINISH will be passed to the final inflate() call and Z_STREAM_END must + * be returned or there has been a problem, otherwise Z_SYNC_FLUSH is used and + * Z_OK or Z_STREAM_END will be returned on success. + * + * The input and output sizes are updated to the actual amounts of data consumed + * or written, not the amount available (as in a z_stream). The data pointers + * are not changed, so the next input is (data+input_size) and the next + * available output is (output+output_size). + */ +static int +png_inflate(png_structrp png_ptr, png_uint_32 owner, int finish, + /* INPUT: */ png_const_bytep input, png_uint_32p input_size_ptr, + /* OUTPUT: */ png_bytep output, png_alloc_size_t *output_size_ptr) +{ + if (png_ptr->zowner == owner) /* Else not claimed */ + { + int ret; + png_alloc_size_t avail_out = *output_size_ptr; + png_uint_32 avail_in = *input_size_ptr; + + /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it + * can't even necessarily handle 65536 bytes) because the type uInt is + * "16 bits or more". Consequently it is necessary to chunk the input to + * zlib. This code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the + * maximum value that can be stored in a uInt.) It is possible to set + * ZLIB_IO_MAX to a lower value in pngpriv.h and this may sometimes have + * a performance advantage, because it reduces the amount of data accessed + * at each step and that may give the OS more time to page it in. */ + png_ptr->zstream.next_in = PNGZ_INPUT_CAST(input); + /* avail_in and avail_out are set below from 'size' */ png_ptr->zstream.avail_in = 0; - inflateReset(&png_ptr->zstream); - - if (ret == Z_STREAM_END) - return count; /* NOTE: may be zero. */ + png_ptr->zstream.avail_out = 0; - /* Now handle the error codes - the API always returns 0 - * and the error message is dumped into the uncompressed - * buffer if available. + /* Read directly into the output if it is available (this is set to + * a local buffer below if output is NULL). */ -# ifdef PNG_WARNINGS_SUPPORTED + if (output != NULL) + png_ptr->zstream.next_out = output; + + do { - png_const_charp msg; + uInt avail; + Byte local_buffer[PNG_INFLATE_BUF_SIZE]; + + /* zlib INPUT BUFFER */ + /* The setting of 'avail_in' used to be outside the loop; by setting it + * inside it is possible to chunk the input to zlib and simply rely on + * zlib to advance the 'next_in' pointer. This allows arbitrary + * amounts of data to be passed through zlib at the unavoidable cost of + * requiring a window save (memcpy of up to 32768 output bytes) + * every ZLIB_IO_MAX input bytes. + */ + avail_in += png_ptr->zstream.avail_in; /* not consumed last time */ - if (png_ptr->zstream.msg != 0) - msg = png_ptr->zstream.msg; + avail = ZLIB_IO_MAX; - else switch (ret) - { - case Z_BUF_ERROR: - msg = "Buffer error in compressed datastream"; - break; + if (avail_in < avail) + avail = (uInt)avail_in; /* safe: < than ZLIB_IO_MAX */ - case Z_DATA_ERROR: - msg = "Data error in compressed datastream"; - break; + avail_in -= avail; + png_ptr->zstream.avail_in = avail; - default: - msg = "Incomplete compressed datastream"; - break; + /* zlib OUTPUT BUFFER */ + avail_out += png_ptr->zstream.avail_out; /* not written last time */ + + avail = ZLIB_IO_MAX; /* maximum zlib can process */ + + if (output == NULL) + { + /* Reset the output buffer each time round if output is NULL and + * make available the full buffer, up to 'remaining_space' + */ + png_ptr->zstream.next_out = local_buffer; + if ((sizeof local_buffer) < avail) + avail = (sizeof local_buffer); } - png_chunk_warning(png_ptr, msg); - } -# endif + if (avail_out < avail) + avail = (uInt)avail_out; /* safe: < ZLIB_IO_MAX */ + + png_ptr->zstream.avail_out = avail; + avail_out -= avail; + + /* zlib inflate call */ + /* In fact 'avail_out' may be 0 at this point, that happens at the end + * of the read when the final LZ end code was not passed at the end of + * the previous chunk of input data. Tell zlib if we have reached the + * end of the output buffer. + */ + ret = PNG_INFLATE(png_ptr, avail_out > 0 ? Z_NO_FLUSH : + (finish ? Z_FINISH : Z_SYNC_FLUSH)); + } while (ret == Z_OK); - /* 0 means an error - notice that this code simply ignores - * zero length compressed chunks as a result. + /* For safety kill the local buffer pointer now */ + if (output == NULL) + png_ptr->zstream.next_out = NULL; + + /* Claw back the 'size' and 'remaining_space' byte counts. */ + avail_in += png_ptr->zstream.avail_in; + avail_out += png_ptr->zstream.avail_out; + + /* Update the input and output sizes; the updated values are the amount + * consumed or written, effectively the inverse of what zlib uses. */ - return 0; + if (avail_out > 0) + *output_size_ptr -= avail_out; + + if (avail_in > 0) + *input_size_ptr -= avail_in; + + /* Ensure png_ptr->zstream.msg is set (even in the success case!) */ + png_zstream_error(png_ptr, ret); + return ret; + } + + else + { + /* This is a bad internal error. The recovery assigns to the zstream msg + * pointer, which is not owned by the caller, but this is safe; it's only + * used on errors! + */ + png_ptr->zstream.msg = PNGZ_MSG_CAST("zstream unclaimed"); + return Z_STREAM_ERROR; } } /* - * Decompress trailing data in a chunk. The assumption is that chunkdata + * Decompress trailing data in a chunk. The assumption is that read_buffer * points at an allocated area holding the contents of a chunk with a * trailing compressed part. What we get back is an allocated area * holding the original prefix part and an uncompressed version of the * trailing part (the malloc area passed in is freed). */ -void /* PRIVATE */ -png_decompress_chunk(png_structp png_ptr, int comp_type, - png_size_t chunklength, - png_size_t prefix_size, png_size_t *newlength) +static int +png_decompress_chunk(png_structrp png_ptr, + png_uint_32 chunklength, png_uint_32 prefix_size, + png_alloc_size_t *newlength /* must be initialized to the maximum! */, + int terminate /*add a '\0' to the end of the uncompressed data*/) { - /* The caller should guarantee this */ - if (prefix_size > chunklength) - { - /* The recovery is to delete the chunk. */ - png_warning(png_ptr, "invalid chunklength"); - prefix_size = 0; /* To delete everything */ - } + /* TODO: implement different limits for different types of chunk. + * + * The caller supplies *newlength set to the maximum length of the + * uncompressed data, but this routine allocates space for the prefix and + * maybe a '\0' terminator too. We have to assume that 'prefix_size' is + * limited only by the maximum chunk size. + */ + png_alloc_size_t limit = PNG_SIZE_MAX; + +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (png_ptr->user_chunk_malloc_max > 0 && + png_ptr->user_chunk_malloc_max < limit) + limit = png_ptr->user_chunk_malloc_max; +# elif PNG_USER_CHUNK_MALLOC_MAX > 0 + if (PNG_USER_CHUNK_MALLOC_MAX < limit) + limit = PNG_USER_CHUNK_MALLOC_MAX; +# endif - else if (comp_type == PNG_COMPRESSION_TYPE_BASE) + if (limit >= prefix_size + (terminate != 0)) { - png_size_t expanded_size = png_inflate(png_ptr, - (png_bytep)(png_ptr->chunkdata + prefix_size), - chunklength - prefix_size, - 0, /* output */ - 0); /* output size */ + int ret; - /* Now check the limits on this chunk - if the limit fails the - * compressed data will be removed, the prefix will remain. - */ - if (prefix_size >= (~(png_size_t)0) - 1 || - expanded_size >= (~(png_size_t)0) - 1 - prefix_size -#ifdef PNG_USER_LIMITS_SUPPORTED - || (png_ptr->user_chunk_malloc_max && - (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1)) -#else - || ((PNG_USER_CHUNK_MALLOC_MAX > 0) && - prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1) -#endif - ) - png_warning(png_ptr, "Exceeded size limit while expanding chunk"); + limit -= prefix_size + (terminate != 0); - /* If the size is zero either there was an error and a message - * has already been output (warning) or the size really is zero - * and we have nothing to do - the code will exit through the - * error case below. - */ - else if (expanded_size > 0) + if (limit < *newlength) + *newlength = limit; + + /* Now try to claim the stream. */ + ret = png_inflate_claim(png_ptr, png_ptr->chunk_name); + + if (ret == Z_OK) { - /* Success (maybe) - really uncompress the chunk. */ - png_size_t new_size = 0; - png_charp text = (png_charp)png_malloc_warn(png_ptr, - prefix_size + expanded_size + 1); + png_uint_32 lzsize = chunklength - prefix_size; - if (text != NULL) + ret = png_inflate(png_ptr, png_ptr->chunk_name, 1/*finish*/, + /* input: */ png_ptr->read_buffer + prefix_size, &lzsize, + /* output: */ NULL, newlength); + + if (ret == Z_STREAM_END) { - png_memcpy(text, png_ptr->chunkdata, prefix_size); - new_size = png_inflate(png_ptr, - (png_bytep)(png_ptr->chunkdata + prefix_size), - chunklength - prefix_size, - (png_bytep)(text + prefix_size), expanded_size); - text[prefix_size + expanded_size] = 0; /* just in case */ - - if (new_size == expanded_size) + /* Use 'inflateReset' here, not 'inflateReset2' because this + * preserves the previously decided window size (otherwise it would + * be necessary to store the previous window size.) In practice + * this doesn't matter anyway, because png_inflate will call inflate + * with Z_FINISH in almost all cases, so the window will not be + * maintained. + */ + if (inflateReset(&png_ptr->zstream) == Z_OK) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = text; - *newlength = prefix_size + expanded_size; - return; /* The success return! */ + /* Because of the limit checks above we know that the new, + * expanded, size will fit in a size_t (let alone an + * png_alloc_size_t). Use png_malloc_base here to avoid an + * extra OOM message. + */ + png_alloc_size_t new_size = *newlength; + png_alloc_size_t buffer_size = prefix_size + new_size + + (terminate != 0); + png_bytep text = png_voidcast(png_bytep, png_malloc_base(png_ptr, + buffer_size)); + + if (text != NULL) + { + ret = png_inflate(png_ptr, png_ptr->chunk_name, 1/*finish*/, + png_ptr->read_buffer + prefix_size, &lzsize, + text + prefix_size, newlength); + + if (ret == Z_STREAM_END) + { + if (new_size == *newlength) + { + if (terminate != 0) + text[prefix_size + *newlength] = 0; + + if (prefix_size > 0) + memcpy(text, png_ptr->read_buffer, prefix_size); + + { + png_bytep old_ptr = png_ptr->read_buffer; + + png_ptr->read_buffer = text; + png_ptr->read_buffer_size = buffer_size; + text = old_ptr; /* freed below */ + } + } + + else + { + /* The size changed on the second read, there can be no + * guarantee that anything is correct at this point. + * The 'msg' pointer has been set to "unexpected end of + * LZ stream", which is fine, but return an error code + * that the caller won't accept. + */ + ret = PNG_UNEXPECTED_ZLIB_RETURN; + } + } + + else if (ret == Z_OK) + ret = PNG_UNEXPECTED_ZLIB_RETURN; /* for safety */ + + /* Free the text pointer (this is the old read_buffer on + * success) + */ + png_free(png_ptr, text); + + /* This really is very benign, but it's still an error because + * the extra space may otherwise be used as a Trojan Horse. + */ + if (ret == Z_STREAM_END && + chunklength - prefix_size != lzsize) + png_chunk_benign_error(png_ptr, "extra compressed data"); + } + + else + { + /* Out of memory allocating the buffer */ + ret = Z_MEM_ERROR; + png_zstream_error(png_ptr, Z_MEM_ERROR); + } } - png_warning(png_ptr, "png_inflate logic error"); - png_free(png_ptr, text); + else + { + /* inflateReset failed, store the error message */ + png_zstream_error(png_ptr, ret); + + if (ret == Z_STREAM_END) + ret = PNG_UNEXPECTED_ZLIB_RETURN; + } } - else - png_warning(png_ptr, "Not enough memory to decompress chunk"); + else if (ret == Z_OK) + ret = PNG_UNEXPECTED_ZLIB_RETURN; + + /* Release the claimed stream */ + png_ptr->zowner = 0; } + + else /* the claim failed */ if (ret == Z_STREAM_END) /* impossible! */ + ret = PNG_UNEXPECTED_ZLIB_RETURN; + + return ret; } - else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */ + else { - PNG_WARNING_PARAMETERS(p) - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, comp_type); - png_formatted_warning(png_ptr, p, "Unknown compression type @1"); - - /* The recovery is to simply drop the data. */ + /* Application/configuration limits exceeded */ + png_zstream_error(png_ptr, Z_MEM_ERROR); + return Z_MEM_ERROR; } +} +#endif /* READ_COMPRESSED_TEXT */ - /* Generic error return - leave the prefix, delete the compressed - * data, reallocate the chunkdata to remove the potentially large - * amount of compressed data. - */ +#ifdef PNG_READ_iCCP_SUPPORTED +/* Perform a partial read and decompress, producing 'avail_out' bytes and + * reading from the current chunk as required. + */ +static int +png_inflate_read(png_structrp png_ptr, png_bytep read_buffer, uInt read_size, + png_uint_32p chunk_bytes, png_bytep next_out, png_alloc_size_t *out_size, + int finish) +{ + if (png_ptr->zowner == png_ptr->chunk_name) { - png_charp text = (png_charp)png_malloc_warn(png_ptr, prefix_size + 1); + int ret; - if (text != NULL) + /* next_in and avail_in must have been initialized by the caller. */ + png_ptr->zstream.next_out = next_out; + png_ptr->zstream.avail_out = 0; /* set in the loop */ + + do { - if (prefix_size > 0) - png_memcpy(text, png_ptr->chunkdata, prefix_size); + if (png_ptr->zstream.avail_in == 0) + { + if (read_size > *chunk_bytes) + read_size = (uInt)*chunk_bytes; + *chunk_bytes -= read_size; - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = text; + if (read_size > 0) + png_crc_read(png_ptr, read_buffer, read_size); - /* This is an extra zero in the 'uncompressed' part. */ - *(png_ptr->chunkdata + prefix_size) = 0x00; + png_ptr->zstream.next_in = read_buffer; + png_ptr->zstream.avail_in = read_size; + } + + if (png_ptr->zstream.avail_out == 0) + { + uInt avail = ZLIB_IO_MAX; + if (avail > *out_size) + avail = (uInt)*out_size; + *out_size -= avail; + + png_ptr->zstream.avail_out = avail; + } + + /* Use Z_SYNC_FLUSH when there is no more chunk data to ensure that all + * the available output is produced; this allows reading of truncated + * streams. + */ + ret = PNG_INFLATE(png_ptr, + *chunk_bytes > 0 ? Z_NO_FLUSH : (finish ? Z_FINISH : Z_SYNC_FLUSH)); } - /* Ignore a malloc error here - it is safe. */ + while (ret == Z_OK && (*out_size > 0 || png_ptr->zstream.avail_out > 0)); + + *out_size += png_ptr->zstream.avail_out; + png_ptr->zstream.avail_out = 0; /* Should not be required, but is safe */ + + /* Ensure the error message pointer is always set: */ + png_zstream_error(png_ptr, ret); + return ret; } - *newlength = prefix_size; + else + { + png_ptr->zstream.msg = PNGZ_MSG_CAST("zstream unclaimed"); + return Z_STREAM_ERROR; + } } -#endif /* PNG_READ_COMPRESSED_TEXT_SUPPORTED */ +#endif /* Read and check the IDHR chunk */ + void /* PRIVATE */ -png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_IHDR(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[13]; png_uint_32 width, height; @@ -542,12 +835,12 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_debug(1, "in png_handle_IHDR"); - if (png_ptr->mode & PNG_HAVE_IHDR) - png_error(png_ptr, "Out of place IHDR"); + if ((png_ptr->mode & PNG_HAVE_IHDR) != 0) + png_chunk_error(png_ptr, "out of place"); /* Check the length */ if (length != 13) - png_error(png_ptr, "Invalid IHDR chunk"); + png_chunk_error(png_ptr, "invalid"); png_ptr->mode |= PNG_HAVE_IHDR; @@ -596,8 +889,7 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } /* Set up other useful info */ - png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth * - png_ptr->channels); + png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth * png_ptr->channels); png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width); png_debug1(3, "bit_depth = %d", png_ptr->bit_depth); png_debug1(3, "channels = %d", png_ptr->channels); @@ -608,7 +900,7 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) /* Read and check the palette */ void /* PRIVATE */ -png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_PLTE(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_color palette[PNG_MAX_PALETTE_LENGTH]; int max_palette_length, num, i; @@ -618,26 +910,33 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_debug(1, "in png_handle_PLTE"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before PLTE"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); + + /* Moved to before the 'after IDAT' check below because otherwise duplicate + * PLTE chunks are potentially ignored (the spec says there shall not be more + * than one PLTE, the error is not treated as benign, so this check trumps + * the requirement that PLTE appears before IDAT.) + */ + else if ((png_ptr->mode & PNG_HAVE_PLTE) != 0) + png_chunk_error(png_ptr, "duplicate"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) { - png_warning(png_ptr, "Invalid PLTE after IDAT"); + /* This is benign because the non-benign error happened before, when an + * IDAT was encountered in a color-mapped image with no PLTE. + */ png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (png_ptr->mode & PNG_HAVE_PLTE) - png_error(png_ptr, "Duplicate PLTE chunk"); - png_ptr->mode |= PNG_HAVE_PLTE; - if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) + if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0) { - png_warning(png_ptr, - "Ignoring PLTE chunk in grayscale PNG"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "ignored in grayscale PNG"); return; } @@ -651,17 +950,15 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3) { + png_crc_finish(png_ptr, length); + if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_warning(png_ptr, "Invalid palette chunk"); - png_crc_finish(png_ptr, length); - return; - } + png_chunk_benign_error(png_ptr, "invalid"); else - { - png_error(png_ptr, "Invalid palette chunk"); - } + png_chunk_error(png_ptr, "invalid"); + + return; } /* The cast is safe because 'length' is less than 3*PNG_MAX_PALETTE_LENGTH */ @@ -716,214 +1013,198 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } #ifndef PNG_READ_OPT_PLTE_SUPPORTED - else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */ + else if (png_crc_error(png_ptr) != 0) /* Only if we have a CRC error */ { /* If we don't want to use the data from an ancillary chunk, * we have two options: an error abort, or a warning and we * ignore the data in this chunk (which should be OK, since * it's considered ancillary for a RGB or RGBA image). + * + * IMPLEMENTATION NOTE: this is only here because png_crc_finish uses the + * chunk type to determine whether to check the ancillary or the critical + * flags. */ - if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE)) + if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE) == 0) { - if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) - { - png_chunk_benign_error(png_ptr, "CRC error"); - } + if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) != 0) + return; else - { - png_chunk_warning(png_ptr, "CRC error"); - return; - } + png_chunk_error(png_ptr, "CRC error"); } /* Otherwise, we (optionally) emit a warning and use the chunk. */ - else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) - { + else if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) == 0) png_chunk_warning(png_ptr, "CRC error"); - } } #endif + /* TODO: png_set_PLTE has the side effect of setting png_ptr->palette to its + * own copy of the palette. This has the side effect that when png_start_row + * is called (this happens after any call to png_read_update_info) the + * info_ptr palette gets changed. This is extremely unexpected and + * confusing. + * + * Fix this by not sharing the palette in this way. + */ png_set_PLTE(png_ptr, info_ptr, palette, num); + /* The three chunks, bKGD, hIST and tRNS *must* appear after PLTE and before + * IDAT. Prior to 1.6.0 this was not checked; instead the code merely + * checked the apparent validity of a tRNS chunk inserted before PLTE on a + * palette PNG. 1.6.0 attempts to rigorously follow the standard and + * therefore does a benign error if the erroneous condition is detected *and* + * cancels the tRNS if the benign error returns. The alternative is to + * amend the standard since it would be rather hypocritical of the standards + * maintainers to ignore it. + */ #ifdef PNG_READ_tRNS_SUPPORTED - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + if (png_ptr->num_trans > 0 || + (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS) != 0)) { - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) - { - if (png_ptr->num_trans > (png_uint_16)num) - { - png_warning(png_ptr, "Truncating incorrect tRNS chunk length"); - png_ptr->num_trans = (png_uint_16)num; - } + /* Cancel this because otherwise it would be used if the transforms + * require it. Don't cancel the 'valid' flag because this would prevent + * detection of duplicate chunks. + */ + png_ptr->num_trans = 0; - if (info_ptr->num_trans > (png_uint_16)num) - { - png_warning(png_ptr, "Truncating incorrect info tRNS chunk length"); - info_ptr->num_trans = (png_uint_16)num; - } - } + if (info_ptr != NULL) + info_ptr->num_trans = 0; + + png_chunk_benign_error(png_ptr, "tRNS must be after"); } #endif +#ifdef PNG_READ_hIST_SUPPORTED + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) != 0) + png_chunk_benign_error(png_ptr, "hIST must be after"); +#endif + +#ifdef PNG_READ_bKGD_SUPPORTED + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) != 0) + png_chunk_benign_error(png_ptr, "bKGD must be after"); +#endif } void /* PRIVATE */ -png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_IEND(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_debug(1, "in png_handle_IEND"); - if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT)) - { - png_error(png_ptr, "No image in file"); - } + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0 || + (png_ptr->mode & PNG_HAVE_IDAT) == 0) + png_chunk_error(png_ptr, "out of place"); png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND); - if (length != 0) - { - png_warning(png_ptr, "Incorrect IEND chunk length"); - } - png_crc_finish(png_ptr, length); - PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ + if (length != 0) + png_chunk_benign_error(png_ptr, "invalid"); + + PNG_UNUSED(info_ptr) } #ifdef PNG_READ_gAMA_SUPPORTED void /* PRIVATE */ -png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_gAMA(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_fixed_point igamma; png_byte buf[4]; png_debug(1, "in png_handle_gAMA"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before gAMA"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid gAMA after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place gAMA chunk"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) -#ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif - ) + else if ((png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) != 0) { - png_warning(png_ptr, "Duplicate gAMA chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } if (length != 4) { - png_warning(png_ptr, "Incorrect gAMA chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 4); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; igamma = png_get_fixed_point(NULL, buf); - /* Check for zero gamma or an error. */ - if (igamma <= 0) - { - png_warning(png_ptr, - "Ignoring gAMA chunk with out of range gamma"); - - return; - } - -# ifdef PNG_READ_sRGB_SUPPORTED - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) - { - if (PNG_OUT_OF_RANGE(igamma, 45500, 500)) - { - PNG_WARNING_PARAMETERS(p) - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, igamma); - png_formatted_warning(png_ptr, p, - "Ignoring incorrect gAMA value @1 when sRGB is also present"); - return; - } - } -# endif /* PNG_READ_sRGB_SUPPORTED */ - -# ifdef PNG_READ_GAMMA_SUPPORTED - /* Gamma correction on read is supported. */ - png_ptr->gamma = igamma; -# endif - /* And set the 'info' structure members. */ - png_set_gAMA_fixed(png_ptr, info_ptr, igamma); + png_colorspace_set_gamma(png_ptr, &png_ptr->colorspace, igamma); + png_colorspace_sync(png_ptr, info_ptr); } #endif #ifdef PNG_READ_sBIT_SUPPORTED void /* PRIVATE */ -png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sBIT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_size_t truelen; + unsigned int truelen, i; + png_byte sample_depth; png_byte buf[4]; png_debug(1, "in png_handle_sBIT"); - buf[0] = buf[1] = buf[2] = buf[3] = 0; + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sBIT"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) != 0) { - png_warning(png_ptr, "Invalid sBIT after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (png_ptr->mode & PNG_HAVE_PLTE) - { - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sBIT chunk"); - } - - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)) + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) != 0) { - png_warning(png_ptr, "Duplicate sBIT chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { truelen = 3; + sample_depth = 8; + } else - truelen = (png_size_t)png_ptr->channels; + { + truelen = png_ptr->channels; + sample_depth = png_ptr->bit_depth; + } if (length != truelen || length > 4) { - png_warning(png_ptr, "Incorrect sBIT chunk length"); + png_chunk_benign_error(png_ptr, "invalid"); png_crc_finish(png_ptr, length); return; } + buf[0] = buf[1] = buf[2] = buf[3] = sample_depth; png_crc_read(png_ptr, buf, truelen); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + for (i=0; i<truelen; ++i) + { + if (buf[i] == 0 || buf[i] > sample_depth) + { + png_chunk_benign_error(png_ptr, "invalid"); + return; + } + } + + if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) { png_ptr->sig_bit.red = buf[0]; png_ptr->sig_bit.green = buf[1]; @@ -946,474 +1227,418 @@ png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_cHRM_SUPPORTED void /* PRIVATE */ -png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_cHRM(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[32]; - png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue, - y_blue; + png_xy xy; png_debug(1, "in png_handle_cHRM"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before cHRM"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid cHRM after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place cHRM chunk"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM) -# ifdef PNG_READ_sRGB_SUPPORTED - && !(info_ptr->valid & PNG_INFO_sRGB) -# endif - ) + else if ((png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) != 0) { - png_warning(png_ptr, "Duplicate cHRM chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } if (length != 32) { - png_warning(png_ptr, "Incorrect cHRM chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 32); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; - x_white = png_get_fixed_point(NULL, buf); - y_white = png_get_fixed_point(NULL, buf + 4); - x_red = png_get_fixed_point(NULL, buf + 8); - y_red = png_get_fixed_point(NULL, buf + 12); - x_green = png_get_fixed_point(NULL, buf + 16); - y_green = png_get_fixed_point(NULL, buf + 20); - x_blue = png_get_fixed_point(NULL, buf + 24); - y_blue = png_get_fixed_point(NULL, buf + 28); - - if (x_white == PNG_FIXED_ERROR || - y_white == PNG_FIXED_ERROR || - x_red == PNG_FIXED_ERROR || - y_red == PNG_FIXED_ERROR || - x_green == PNG_FIXED_ERROR || - y_green == PNG_FIXED_ERROR || - x_blue == PNG_FIXED_ERROR || - y_blue == PNG_FIXED_ERROR) - { - png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities"); + xy.whitex = png_get_fixed_point(NULL, buf); + xy.whitey = png_get_fixed_point(NULL, buf + 4); + xy.redx = png_get_fixed_point(NULL, buf + 8); + xy.redy = png_get_fixed_point(NULL, buf + 12); + xy.greenx = png_get_fixed_point(NULL, buf + 16); + xy.greeny = png_get_fixed_point(NULL, buf + 20); + xy.bluex = png_get_fixed_point(NULL, buf + 24); + xy.bluey = png_get_fixed_point(NULL, buf + 28); + + if (xy.whitex == PNG_FIXED_ERROR || + xy.whitey == PNG_FIXED_ERROR || + xy.redx == PNG_FIXED_ERROR || + xy.redy == PNG_FIXED_ERROR || + xy.greenx == PNG_FIXED_ERROR || + xy.greeny == PNG_FIXED_ERROR || + xy.bluex == PNG_FIXED_ERROR || + xy.bluey == PNG_FIXED_ERROR) + { + png_chunk_benign_error(png_ptr, "invalid values"); return; } -#ifdef PNG_READ_sRGB_SUPPORTED - if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB)) - { - if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(x_red, 64000, 1000) || - PNG_OUT_OF_RANGE(y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(y_green, 60000, 1000) || - PNG_OUT_OF_RANGE(x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(y_blue, 6000, 1000)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, x_white); - png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_fixed, y_white); - png_warning_parameter_signed(p, 3, PNG_NUMBER_FORMAT_fixed, x_red); - png_warning_parameter_signed(p, 4, PNG_NUMBER_FORMAT_fixed, y_red); - png_warning_parameter_signed(p, 5, PNG_NUMBER_FORMAT_fixed, x_green); - png_warning_parameter_signed(p, 6, PNG_NUMBER_FORMAT_fixed, y_green); - png_warning_parameter_signed(p, 7, PNG_NUMBER_FORMAT_fixed, x_blue); - png_warning_parameter_signed(p, 8, PNG_NUMBER_FORMAT_fixed, y_blue); - - png_formatted_warning(png_ptr, p, - "Ignoring incorrect cHRM white(@1,@2) r(@3,@4)g(@5,@6)b(@7,@8) " - "when sRGB is also present"); - } + /* If a colorspace error has already been output skip this chunk */ + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) != 0) return; - } -#endif /* PNG_READ_sRGB_SUPPORTED */ -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Store the _white values as default coefficients for the rgb to gray - * operation if it is supported. Check if the transform is already set to - * avoid destroying the transform values. - */ - if (!png_ptr->rgb_to_gray_coefficients_set) + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_FROM_cHRM) != 0) { - /* png_set_background has not been called and we haven't seen an sRGB - * chunk yet. Find the XYZ of the three end points. - */ - png_XYZ XYZ; - png_xy xy; - - xy.redx = x_red; - xy.redy = y_red; - xy.greenx = x_green; - xy.greeny = y_green; - xy.bluex = x_blue; - xy.bluey = y_blue; - xy.whitex = x_white; - xy.whitey = y_white; - - if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) - { - /* The success case, because XYZ_from_xy normalises to a reference - * white Y of 1.0 we just need to scale the numbers. This should - * always work just fine. It is an internal error if this overflows. - */ - { - png_fixed_point r, g, b; - if (png_muldiv(&r, XYZ.redY, 32768, PNG_FP_1) && - r >= 0 && r <= 32768 && - png_muldiv(&g, XYZ.greenY, 32768, PNG_FP_1) && - g >= 0 && g <= 32768 && - png_muldiv(&b, XYZ.blueY, 32768, PNG_FP_1) && - b >= 0 && b <= 32768 && - r+g+b <= 32769) - { - /* We allow 0 coefficients here. r+g+b may be 32769 if two or - * all of the coefficients were rounded up. Handle this by - * reducing the *largest* coefficient by 1; this matches the - * approach used for the default coefficients in pngrtran.c - */ - int add = 0; - - if (r+g+b > 32768) - add = -1; - else if (r+g+b < 32768) - add = 1; - - if (add != 0) - { - if (g >= r && g >= b) - g += add; - else if (r >= g && r >= b) - r += add; - else - b += add; - } - - /* Check for an internal error. */ - if (r+g+b != 32768) - png_error(png_ptr, - "internal error handling cHRM coefficients"); - - png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r; - png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g; - } - - /* This is a png_error at present even though it could be ignored - - * it should never happen, but it is important that if it does, the - * bug is fixed. - */ - else - png_error(png_ptr, "internal error handling cHRM->XYZ"); - } - } + png_ptr->colorspace.flags |= PNG_COLORSPACE_INVALID; + png_colorspace_sync(png_ptr, info_ptr); + png_chunk_benign_error(png_ptr, "duplicate"); + return; } -#endif - png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red, - x_green, y_green, x_blue, y_blue); + png_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; + (void)png_colorspace_set_chromaticities(png_ptr, &png_ptr->colorspace, &xy, + 1/*prefer cHRM values*/); + png_colorspace_sync(png_ptr, info_ptr); } #endif #ifdef PNG_READ_sRGB_SUPPORTED void /* PRIVATE */ -png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sRGB(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - int intent; - png_byte buf[1]; + png_byte intent; png_debug(1, "in png_handle_sRGB"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sRGB"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) != 0) { - png_warning(png_ptr, "Invalid sRGB after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sRGB chunk"); - - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) - { - png_warning(png_ptr, "Duplicate sRGB chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } if (length != 1) { - png_warning(png_ptr, "Incorrect sRGB chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - png_crc_read(png_ptr, buf, 1); + png_crc_read(png_ptr, &intent, 1); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; - intent = buf[0]; - - /* Check for bad intent */ - if (intent >= PNG_sRGB_INTENT_LAST) - { - png_warning(png_ptr, "Unknown sRGB intent"); + /* If a colorspace error has already been output skip this chunk */ + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) != 0) return; - } -#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)) + /* Only one sRGB or iCCP chunk is allowed, use the HAVE_INTENT flag to detect + * this. + */ + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_INTENT) != 0) { - if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500, 500)) - { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, - info_ptr->gamma); - - png_formatted_warning(png_ptr, p, - "Ignoring incorrect gAMA value @1 when sRGB is also present"); - } + png_ptr->colorspace.flags |= PNG_COLORSPACE_INVALID; + png_colorspace_sync(png_ptr, info_ptr); + png_chunk_benign_error(png_ptr, "too many profiles"); + return; } -#endif /* PNG_READ_gAMA_SUPPORTED */ -#ifdef PNG_READ_cHRM_SUPPORTED - if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_red, 64000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_green, 60000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) || - PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000)) - { - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); - } -#endif /* PNG_READ_cHRM_SUPPORTED */ - - /* This is recorded for use when handling the cHRM chunk above. An sRGB - * chunk unconditionally overwrites the coefficients for grayscale conversion - * too. - */ - png_ptr->is_sRGB = 1; - -# ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Don't overwrite user supplied values: */ - if (!png_ptr->rgb_to_gray_coefficients_set) - { - /* These numbers come from the sRGB specification (or, since one has to - * pay much money to get a copy, the wikipedia sRGB page) the - * chromaticity values quoted have been inverted to get the reverse - * transformation from RGB to XYZ and the 'Y' coefficients scaled by - * 32768 (then rounded). - * - * sRGB and ITU Rec-709 both truncate the values for the D65 white - * point to four digits and, even though it actually stores five - * digits, the PNG spec gives the truncated value. - * - * This means that when the chromaticities are converted back to XYZ - * end points we end up with (6968,23435,2366), which, as described in - * pngrtran.c, would overflow. If the five digit precision and up is - * used we get, instead: - * - * 6968*R + 23435*G + 2365*B - * - * (Notice that this rounds the blue coefficient down, rather than the - * choice used in pngrtran.c which is to round the green one down.) - */ - png_ptr->rgb_to_gray_red_coeff = 6968; /* 0.212639005871510 */ - png_ptr->rgb_to_gray_green_coeff = 23434; /* 0.715168678767756 */ - /* png_ptr->rgb_to_gray_blue_coeff = 2366; 0.072192315360734 */ - - /* The following keeps the cHRM chunk from destroying the - * coefficients again in the event that it follows the sRGB chunk. - */ - png_ptr->rgb_to_gray_coefficients_set = 1; - } -# endif - - png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent); + (void)png_colorspace_set_sRGB(png_ptr, &png_ptr->colorspace, intent); + png_colorspace_sync(png_ptr, info_ptr); } -#endif /* PNG_READ_sRGB_SUPPORTED */ +#endif /* READ_sRGB */ #ifdef PNG_READ_iCCP_SUPPORTED void /* PRIVATE */ -png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -/* Note: this does not properly handle chunks that are > 64K under DOS */ +png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) +/* Note: this does not properly handle profiles that are > 64K under DOS */ { - png_byte compression_type; - png_bytep pC; - png_charp profile; - png_uint_32 skip = 0; - png_uint_32 profile_size; - png_alloc_size_t profile_length; - png_size_t slength, prefix_length, data_length; + png_const_charp errmsg = NULL; /* error message output, or no error */ + int finished = 0; /* crc checked */ png_debug(1, "in png_handle_iCCP"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iCCP"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & (PNG_HAVE_IDAT|PNG_HAVE_PLTE)) != 0) { - png_warning(png_ptr, "Invalid iCCP after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place iCCP chunk"); - - if ((png_ptr->mode & PNG_HAVE_iCCP) || (info_ptr != NULL && - (info_ptr->valid & (PNG_INFO_iCCP|PNG_INFO_sRGB)))) + /* Consistent with all the above colorspace handling an obviously *invalid* + * chunk is just ignored, so does not invalidate the color space. An + * alternative is to set the 'invalid' flags at the start of this routine + * and only clear them in they were not set before and all the tests pass. + * The minimum 'deflate' stream is assumed to be just the 2 byte header and + * 4 byte checksum. The keyword must be at least one character and there is + * a terminator (0) byte and the compression method. + */ + if (length < 9) { - png_warning(png_ptr, "Duplicate iCCP chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "too short"); return; } - png_ptr->mode |= PNG_HAVE_iCCP; - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) + /* If a colorspace error has already been output skip this chunk */ + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) != 0) { - png_warning(png_ptr, "iCCP chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; + png_crc_finish(png_ptr, length); + return; } -#endif - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, skip)) + /* Only one sRGB or iCCP chunk is allowed, use the HAVE_INTENT flag to detect + * this. + */ + if ((png_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_INTENT) == 0) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + uInt read_length, keyword_length; + char keyword[81]; - png_ptr->chunkdata[slength] = 0x00; + /* Find the keyword; the keyword plus separator and compression method + * bytes can be at most 81 characters long. + */ + read_length = 81; /* maximum */ + if (read_length > length) + read_length = (uInt)length; - for (profile = png_ptr->chunkdata; *profile; profile++) - /* Empty loop to find end of name */ ; + png_crc_read(png_ptr, (png_bytep)keyword, read_length); + length -= read_length; - ++profile; + keyword_length = 0; + while (keyword_length < 80 && keyword_length < read_length && + keyword[keyword_length] != 0) + ++keyword_length; - /* There should be at least one zero (the compression type byte) - * following the separator, and we should be on it - */ - if (slength < 1U || profile >= png_ptr->chunkdata + slength - 1U) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "Malformed iCCP chunk"); - return; - } + /* TODO: make the keyword checking common */ + if (keyword_length >= 1 && keyword_length <= 79) + { + /* We only understand '0' compression - deflate - so if we get a + * different value we can't safely decode the chunk. + */ + if (keyword_length+1 < read_length && + keyword[keyword_length+1] == PNG_COMPRESSION_TYPE_BASE) + { + read_length -= keyword_length+2; - /* Compression_type should always be zero */ - compression_type = *profile++; + if (png_inflate_claim(png_ptr, png_iCCP) == Z_OK) + { + Byte profile_header[132]; + Byte local_buffer[PNG_INFLATE_BUF_SIZE]; + png_alloc_size_t size = (sizeof profile_header); - if (compression_type != 0) - { - png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk"); - compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8 - wrote nonzero) */ - } + png_ptr->zstream.next_in = (Bytef*)keyword + (keyword_length+2); + png_ptr->zstream.avail_in = read_length; + (void)png_inflate_read(png_ptr, local_buffer, + (sizeof local_buffer), &length, profile_header, &size, + 0/*finish: don't, because the output is too small*/); - prefix_length = profile - png_ptr->chunkdata; - png_decompress_chunk(png_ptr, compression_type, - slength, prefix_length, &data_length); + if (size == 0) + { + /* We have the ICC profile header; do the basic header checks. + */ + const png_uint_32 profile_length = + png_get_uint_32(profile_header); - profile_length = data_length - prefix_length; + if (png_icc_check_length(png_ptr, &png_ptr->colorspace, + keyword, profile_length) != 0) + { + /* The length is apparently ok, so we can check the 132 + * byte header. + */ + if (png_icc_check_header(png_ptr, &png_ptr->colorspace, + keyword, profile_length, profile_header, + png_ptr->color_type) != 0) + { + /* Now read the tag table; a variable size buffer is + * needed at this point, allocate one for the whole + * profile. The header check has already validated + * that none of these stuff will overflow. + */ + const png_uint_32 tag_count = png_get_uint_32( + profile_header+128); + png_bytep profile = png_read_buffer(png_ptr, + profile_length, 2/*silent*/); + + if (profile != NULL) + { + memcpy(profile, profile_header, + (sizeof profile_header)); + + size = 12 * tag_count; + + (void)png_inflate_read(png_ptr, local_buffer, + (sizeof local_buffer), &length, + profile + (sizeof profile_header), &size, 0); + + /* Still expect a buffer error because we expect + * there to be some tag data! + */ + if (size == 0) + { + if (png_icc_check_tag_table(png_ptr, + &png_ptr->colorspace, keyword, profile_length, + profile) != 0) + { + /* The profile has been validated for basic + * security issues, so read the whole thing in. + */ + size = profile_length - (sizeof profile_header) + - 12 * tag_count; + + (void)png_inflate_read(png_ptr, local_buffer, + (sizeof local_buffer), &length, + profile + (sizeof profile_header) + + 12 * tag_count, &size, 1/*finish*/); + + if (length > 0 && !(png_ptr->flags & + PNG_FLAG_BENIGN_ERRORS_WARN)) + errmsg = "extra compressed data"; + + /* But otherwise allow extra data: */ + else if (size == 0) + { + if (length > 0) + { + /* This can be handled completely, so + * keep going. + */ + png_chunk_warning(png_ptr, + "extra compressed data"); + } + + png_crc_finish(png_ptr, length); + finished = 1; + +# ifdef PNG_sRGB_SUPPORTED + /* Check for a match against sRGB */ + png_icc_set_sRGB(png_ptr, + &png_ptr->colorspace, profile, + png_ptr->zstream.adler); +# endif + + /* Steal the profile for info_ptr. */ + if (info_ptr != NULL) + { + png_free_data(png_ptr, info_ptr, + PNG_FREE_ICCP, 0); + + info_ptr->iccp_name = png_voidcast(char*, + png_malloc_base(png_ptr, + keyword_length+1)); + if (info_ptr->iccp_name != NULL) + { + memcpy(info_ptr->iccp_name, keyword, + keyword_length+1); + info_ptr->iccp_proflen = + profile_length; + info_ptr->iccp_profile = profile; + png_ptr->read_buffer = NULL; /*steal*/ + info_ptr->free_me |= PNG_FREE_ICCP; + info_ptr->valid |= PNG_INFO_iCCP; + } + + else + { + png_ptr->colorspace.flags |= + PNG_COLORSPACE_INVALID; + errmsg = "out of memory"; + } + } + + /* else the profile remains in the read + * buffer which gets reused for subsequent + * chunks. + */ + + if (info_ptr != NULL) + png_colorspace_sync(png_ptr, info_ptr); + + if (errmsg == NULL) + { + png_ptr->zowner = 0; + return; + } + } + + else if (size > 0) + errmsg = "truncated"; + +#ifndef __COVERITY__ + else + errmsg = png_ptr->zstream.msg; +#endif + } - if (prefix_length > data_length || profile_length < 4) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "Profile size field missing from iCCP chunk"); - return; - } + /* else png_icc_check_tag_table output an error */ + } - /* Check the profile_size recorded in the first 32 bits of the ICC profile */ - pC = (png_bytep)(png_ptr->chunkdata + prefix_length); - profile_size = ((*(pC )) << 24) | - ((*(pC + 1)) << 16) | - ((*(pC + 2)) << 8) | - ((*(pC + 3)) ); + else /* profile truncated */ + errmsg = png_ptr->zstream.msg; + } - /* NOTE: the following guarantees that 'profile_length' fits into 32 bits, - * because profile_size is a 32 bit value. - */ - if (profile_size < profile_length) - profile_length = profile_size; + else + errmsg = "out of memory"; + } - /* And the following guarantees that profile_size == profile_length. */ - if (profile_size > profile_length) - { - PNG_WARNING_PARAMETERS(p) + /* else png_icc_check_header output an error */ + } - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + /* else png_icc_check_length output an error */ + } - png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_u, profile_size); - png_warning_parameter_unsigned(p, 2, PNG_NUMBER_FORMAT_u, profile_length); - png_formatted_warning(png_ptr, p, - "Ignoring iCCP chunk with declared size = @1 and actual length = @2"); - return; + else /* profile truncated */ + errmsg = png_ptr->zstream.msg; + + /* Release the stream */ + png_ptr->zowner = 0; + } + + else /* png_inflate_claim failed */ + errmsg = png_ptr->zstream.msg; + } + + else + errmsg = "bad compression method"; /* or missing */ + } + + else + errmsg = "bad keyword"; } - png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata, - compression_type, (png_bytep)png_ptr->chunkdata + prefix_length, - profile_size); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + else + errmsg = "too many profiles"; + + /* Failure: the reason is in 'errmsg' */ + if (finished == 0) + png_crc_finish(png_ptr, length); + + png_ptr->colorspace.flags |= PNG_COLORSPACE_INVALID; + png_colorspace_sync(png_ptr, info_ptr); + if (errmsg != NULL) /* else already output */ + png_chunk_benign_error(png_ptr, errmsg); } -#endif /* PNG_READ_iCCP_SUPPORTED */ +#endif /* READ_iCCP */ #ifdef PNG_READ_sPLT_SUPPORTED void /* PRIVATE */ -png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sPLT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) /* Note: this does not properly handle chunks that are > 64K under DOS */ { - png_bytep entry_start; + png_bytep entry_start, buffer; png_sPLT_t new_palette; png_sPLT_entryp pp; png_uint_32 data_length; int entry_size, i; png_uint_32 skip = 0; - png_size_t slength; png_uint_32 dl; png_size_t max_dl; png_debug(1, "in png_handle_sPLT"); #ifdef PNG_USER_LIMITS_SUPPORTED - if (png_ptr->user_chunk_cache_max != 0) { if (png_ptr->user_chunk_cache_max == 1) @@ -1431,56 +1656,53 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) } #endif - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sPLT"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) { - png_warning(png_ptr, "Invalid sPLT after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } #ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) + if (length > 65535U) { - png_warning(png_ptr, "sPLT chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "too large to fit in memory"); + return; } #endif - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length+1, 2/*silent*/); + if (buffer == NULL) + { + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); + return; + } + /* WARNING: this may break if size_t is less than 32 bits; it is assumed * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a * potential breakage point if the types in pngconf.h aren't exactly right. */ - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + if (png_crc_finish(png_ptr, skip) != 0) return; - } - png_ptr->chunkdata[slength] = 0x00; + buffer[length] = 0; - for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start; - entry_start++) + for (entry_start = buffer; *entry_start; entry_start++) /* Empty loop to find end of name */ ; ++entry_start; /* A sample depth should follow the separator, and we should be on it */ - if (slength < 2U || - entry_start > (png_bytep)png_ptr->chunkdata + slength - 2U) + if (length < 2U || entry_start > buffer + (length - 2U)) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_warning(png_ptr, "malformed sPLT chunk"); return; } @@ -1488,39 +1710,35 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) new_palette.depth = *entry_start++; entry_size = (new_palette.depth == 8 ? 6 : 10); /* This must fit in a png_uint_32 because it is derived from the original - * chunk data length (and use 'length', not 'slength' here for clarity - - * they are guaranteed to be the same, see the tests above.) + * chunk data length. */ - data_length = length - (png_uint_32)(entry_start - - (png_bytep)png_ptr->chunkdata); + data_length = length - (png_uint_32)(entry_start - buffer); /* Integrity-check the data length */ - if (data_length % entry_size) + if ((data_length % entry_size) != 0) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_warning(png_ptr, "sPLT chunk has bad length"); return; } dl = (png_int_32)(data_length / entry_size); - max_dl = PNG_SIZE_MAX / png_sizeof(png_sPLT_entry); + max_dl = PNG_SIZE_MAX / (sizeof (png_sPLT_entry)); if (dl > max_dl) { - png_warning(png_ptr, "sPLT chunk too long"); - return; + png_warning(png_ptr, "sPLT chunk too long"); + return; } new_palette.nentries = (png_int_32)(data_length / entry_size); new_palette.entries = (png_sPLT_entryp)png_malloc_warn( - png_ptr, new_palette.nentries * png_sizeof(png_sPLT_entry)); + png_ptr, new_palette.nentries * (sizeof (png_sPLT_entry))); if (new_palette.entries == NULL) { - png_warning(png_ptr, "sPLT chunk requires too much memory"); - return; + png_warning(png_ptr, "sPLT chunk requires too much memory"); + return; } #ifdef PNG_POINTER_INDEXING_SUPPORTED @@ -1573,38 +1791,36 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #endif /* Discard all chunk data except the name and stash that */ - new_palette.name = png_ptr->chunkdata; + new_palette.name = (png_charp)buffer; png_set_sPLT(png_ptr, info_ptr, &new_palette, 1); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_free(png_ptr, new_palette.entries); } -#endif /* PNG_READ_sPLT_SUPPORTED */ +#endif /* READ_sPLT */ #ifdef PNG_READ_tRNS_SUPPORTED void /* PRIVATE */ -png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_tRNS(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte readbuf[PNG_MAX_PALETTE_LENGTH]; png_debug(1, "in png_handle_tRNS"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tRNS"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) { - png_warning(png_ptr, "Invalid tRNS after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS) != 0) { - png_warning(png_ptr, "Duplicate tRNS chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } @@ -1614,8 +1830,8 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (length != 2) { - png_warning(png_ptr, "Incorrect tRNS chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } @@ -1630,12 +1846,12 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (length != 6) { - png_warning(png_ptr, "Incorrect tRNS chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - png_crc_read(png_ptr, buf, (png_size_t)length); + png_crc_read(png_ptr, buf, length); png_ptr->num_trans = 1; png_ptr->trans_color.red = png_get_uint_16(buf); png_ptr->trans_color.green = png_get_uint_16(buf + 2); @@ -1644,44 +1860,44 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { - if (!(png_ptr->mode & PNG_HAVE_PLTE)) - { - /* Should be an error, but we can cope with it. */ - png_warning(png_ptr, "Missing PLTE before tRNS"); - } - - if (length > (png_uint_32)png_ptr->num_palette || - length > PNG_MAX_PALETTE_LENGTH) + if ((png_ptr->mode & PNG_HAVE_PLTE) == 0) { - png_warning(png_ptr, "Incorrect tRNS chunk length"); + /* TODO: is this actually an error in the ISO spec? */ png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - if (length == 0) + if (length > (unsigned int) png_ptr->num_palette || + length > (unsigned int) PNG_MAX_PALETTE_LENGTH || + length == 0) { - png_warning(png_ptr, "Zero length tRNS chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - png_crc_read(png_ptr, readbuf, (png_size_t)length); + png_crc_read(png_ptr, readbuf, length); png_ptr->num_trans = (png_uint_16)length; } else { - png_warning(png_ptr, "tRNS chunk not allowed with alpha channel"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid with alpha channel"); return; } - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) { png_ptr->num_trans = 0; return; } + /* TODO: this is a horrible side effect in the palette case because the + * png_struct ends up with a pointer to the tRNS buffer owned by the + * png_info. Fix this. + */ png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans, &(png_ptr->trans_color)); } @@ -1689,43 +1905,37 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_bKGD_SUPPORTED void /* PRIVATE */ -png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_bKGD(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_size_t truelen; + unsigned int truelen; png_byte buf[6]; png_color_16 background; png_debug(1, "in png_handle_bKGD"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before bKGD"); - - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid bKGD after IDAT"); - png_crc_finish(png_ptr, length); - return; - } + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0 || + (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + (png_ptr->mode & PNG_HAVE_PLTE) == 0)) { - png_warning(png_ptr, "Missing PLTE before bKGD"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) != 0) { - png_warning(png_ptr, "Duplicate bKGD chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) truelen = 1; - else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + else if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) truelen = 6; else @@ -1733,14 +1943,14 @@ png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (length != truelen) { - png_warning(png_ptr, "Incorrect bKGD chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, truelen); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; /* We convert the index value into RGB components so that we can allow @@ -1752,11 +1962,11 @@ png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) { background.index = buf[0]; - if (info_ptr && info_ptr->num_palette) + if (info_ptr != NULL && info_ptr->num_palette != 0) { if (buf[0] >= info_ptr->num_palette) { - png_warning(png_ptr, "Incorrect bKGD chunk index value"); + png_chunk_benign_error(png_ptr, "invalid index"); return; } @@ -1771,7 +1981,7 @@ png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) background.gray = 0; } - else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */ + else if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0) /* GRAY */ { background.index = 0; background.red = @@ -1795,47 +2005,41 @@ png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_hIST_SUPPORTED void /* PRIVATE */ -png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_hIST(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { unsigned int num, i; png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH]; png_debug(1, "in png_handle_hIST"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before hIST"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0 || + (png_ptr->mode & PNG_HAVE_PLTE) == 0) { - png_warning(png_ptr, "Invalid hIST after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (!(png_ptr->mode & PNG_HAVE_PLTE)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) != 0) { - png_warning(png_ptr, "Missing PLTE before hIST"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)) - { - png_warning(png_ptr, "Duplicate hIST chunk"); - png_crc_finish(png_ptr, length); - return; - } + num = length / 2 ; - if (length > 2*PNG_MAX_PALETTE_LENGTH || - length != (unsigned int) (2*png_ptr->num_palette)) + if (num != (unsigned int) png_ptr->num_palette || + num > (unsigned int) PNG_MAX_PALETTE_LENGTH) { - png_warning(png_ptr, "Incorrect hIST chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } - num = length / 2 ; - for (i = 0; i < num; i++) { png_byte buf[2]; @@ -1844,7 +2048,7 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) readbuf[i] = png_get_uint_16(buf); } - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; png_set_hIST(png_ptr, info_ptr, readbuf); @@ -1853,7 +2057,7 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_pHYs_SUPPORTED void /* PRIVATE */ -png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_pHYs(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[9]; png_uint_32 res_x, res_y; @@ -1861,33 +2065,33 @@ png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_debug(1, "in png_handle_pHYs"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pHYs"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) { - png_warning(png_ptr, "Invalid pHYs after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs) != 0) { - png_warning(png_ptr, "Duplicate pHYs chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (length != 9) { - png_warning(png_ptr, "Incorrect pHYs chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 9); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; res_x = png_get_uint_32(buf); @@ -1899,7 +2103,7 @@ png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_oFFs_SUPPORTED void /* PRIVATE */ -png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_oFFs(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[9]; png_int_32 offset_x, offset_y; @@ -1907,33 +2111,33 @@ png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_debug(1, "in png_handle_oFFs"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before oFFs"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) { - png_warning(png_ptr, "Invalid oFFs after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) != 0) { - png_warning(png_ptr, "Duplicate oFFs chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } if (length != 9) { - png_warning(png_ptr, "Incorrect oFFs chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 9); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; offset_x = png_get_int_32(buf); @@ -1946,71 +2150,64 @@ png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_pCAL_SUPPORTED /* Read the pCAL chunk (described in the PNG Extensions document) */ void /* PRIVATE */ -png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_pCAL(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_int_32 X0, X1; png_byte type, nparams; - png_charp buf, units, endptr; + png_bytep buffer, buf, units, endptr; png_charpp params; - png_size_t slength; int i; png_debug(1, "in png_handle_pCAL"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pCAL"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) { - png_warning(png_ptr, "Invalid pCAL after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL) != 0) { - png_warning(png_ptr, "Duplicate pCAL chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)", length + 1); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - if (png_ptr->chunkdata == NULL) + buffer = png_read_buffer(png_ptr, length+1, 2/*silent*/); + + if (buffer == NULL) { - png_warning(png_ptr, "No memory for pCAL purpose"); + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + if (png_crc_finish(png_ptr, 0) != 0) return; - } - png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ + buffer[length] = 0; /* Null terminate the last string */ png_debug(3, "Finding end of pCAL purpose string"); - for (buf = png_ptr->chunkdata; *buf; buf++) + for (buf = buffer; *buf; buf++) /* Empty loop */ ; - endptr = png_ptr->chunkdata + slength; + endptr = buffer + length; /* We need to have at least 12 bytes after the purpose string * in order to get the parameter information. */ if (endptr - buf <= 12) { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + png_chunk_benign_error(png_ptr, "invalid"); return; } @@ -2030,15 +2227,13 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) (type == PNG_EQUATION_ARBITRARY && nparams != 3) || (type == PNG_EQUATION_HYPERBOLIC && nparams != 4)) { - png_warning(png_ptr, "Invalid pCAL parameters for equation type"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + png_chunk_benign_error(png_ptr, "invalid parameter count"); return; } else if (type >= PNG_EQUATION_LAST) { - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); + png_chunk_benign_error(png_ptr, "unrecognized equation type"); } for (buf = units; *buf; buf++) @@ -2046,43 +2241,37 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_debug(3, "Allocating pCAL parameters array"); - params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)(nparams * png_sizeof(png_charp))); + params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, + nparams * (sizeof (png_charp)))); if (params == NULL) { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_warning(png_ptr, "No memory for pCAL params"); + png_chunk_benign_error(png_ptr, "out of memory"); return; } /* Get pointers to the start of each parameter string. */ - for (i = 0; i < (int)nparams; i++) + for (i = 0; i < nparams; i++) { buf++; /* Skip the null string terminator from previous parameter. */ png_debug1(3, "Reading pCAL parameter %d", i); - for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++) + for (params[i] = (png_charp)buf; buf <= endptr && *buf != 0; buf++) /* Empty loop to move past each parameter string */ ; /* Make sure we haven't run out of data yet */ if (buf > endptr) { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_free(png_ptr, params); + png_chunk_benign_error(png_ptr, "invalid data"); return; } } - png_set_pCAL(png_ptr, info_ptr, png_ptr->chunkdata, X0, X1, type, nparams, - units, params); + png_set_pCAL(png_ptr, info_ptr, (png_charp)buffer, X0, X1, type, nparams, + (png_charp)units, params); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; png_free(png_ptr, params); } #endif @@ -2090,67 +2279,61 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_sCAL_SUPPORTED /* Read the sCAL chunk */ void /* PRIVATE */ -png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_sCAL(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_size_t slength, i; + png_bytep buffer; + png_size_t i; int state; png_debug(1, "in png_handle_sCAL"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sCAL"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (png_ptr->mode & PNG_HAVE_IDAT) + else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) { - png_warning(png_ptr, "Invalid sCAL after IDAT"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of place"); return; } - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL) != 0) { - png_warning(png_ptr, "Duplicate sCAL chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } /* Need unit type, width, \0, height: minimum 4 bytes */ else if (length < 4) { - png_warning(png_ptr, "sCAL chunk too short"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)", length + 1); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length+1, 2/*silent*/); - if (png_ptr->chunkdata == NULL) + if (buffer == NULL) { - png_warning(png_ptr, "Out of memory while processing sCAL chunk"); + png_chunk_benign_error(png_ptr, "out of memory"); png_crc_finish(png_ptr, length); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ + png_crc_read(png_ptr, buffer, length); + buffer[length] = 0; /* Null terminate the last string */ - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + if (png_crc_finish(png_ptr, 0) != 0) return; - } /* Validate the unit. */ - if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2) + if (buffer[0] != 1 && buffer[0] != 2) { - png_warning(png_ptr, "Invalid sCAL ignored: invalid unit"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + png_chunk_benign_error(png_ptr, "invalid unit"); return; } @@ -2160,70 +2343,65 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) i = 1; state = 0; - if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || - i >= slength || png_ptr->chunkdata[i++] != 0) - png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format"); + if (png_check_fp_number((png_const_charp)buffer, length, &state, &i) == 0 || + i >= length || buffer[i++] != 0) + png_chunk_benign_error(png_ptr, "bad width format"); - else if (!PNG_FP_IS_POSITIVE(state)) - png_warning(png_ptr, "Invalid sCAL chunk ignored: non-positive width"); + else if (PNG_FP_IS_POSITIVE(state) == 0) + png_chunk_benign_error(png_ptr, "non-positive width"); else { png_size_t heighti = i; state = 0; - if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || - i != slength) - png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format"); + if (png_check_fp_number((png_const_charp)buffer, length, + &state, &i) == 0 || i != length) + png_chunk_benign_error(png_ptr, "bad height format"); - else if (!PNG_FP_IS_POSITIVE(state)) - png_warning(png_ptr, - "Invalid sCAL chunk ignored: non-positive height"); + else if (PNG_FP_IS_POSITIVE(state) == 0) + png_chunk_benign_error(png_ptr, "non-positive height"); else /* This is the (only) success case. */ - png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0], - png_ptr->chunkdata+1, png_ptr->chunkdata+heighti); + png_set_sCAL_s(png_ptr, info_ptr, buffer[0], + (png_charp)buffer+1, (png_charp)buffer+heighti); } - - /* Clean up - just free the temporarily allocated buffer. */ - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; } #endif #ifdef PNG_READ_tIME_SUPPORTED void /* PRIVATE */ -png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_tIME(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { png_byte buf[7]; png_time mod_time; png_debug(1, "in png_handle_tIME"); - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Out of place tIME chunk"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)) + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) != 0) { - png_warning(png_ptr, "Duplicate tIME chunk"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "duplicate"); return; } - if (png_ptr->mode & PNG_HAVE_IDAT) + if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) png_ptr->mode |= PNG_AFTER_IDAT; if (length != 7) { - png_warning(png_ptr, "Incorrect tIME chunk length"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "invalid"); return; } png_crc_read(png_ptr, buf, 7); - if (png_crc_finish(png_ptr, 0)) + if (png_crc_finish(png_ptr, 0) != 0) return; mod_time.second = buf[6]; @@ -2240,14 +2418,13 @@ png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_tEXt_SUPPORTED /* Note: this does not properly handle chunks that are > 64K under DOS */ void /* PRIVATE */ -png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_tEXt(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_textp text_ptr; + png_text text_info; + png_bytep buffer; png_charp key; png_charp text; png_uint_32 skip = 0; - png_size_t slength; - int ret; png_debug(1, "in png_handle_tEXt"); @@ -2262,84 +2439,59 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (--png_ptr->user_chunk_cache_max == 1) { - png_warning(png_ptr, "No space in chunk cache for tEXt"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "no space in chunk cache"); return; } } #endif - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tEXt"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - if (png_ptr->mode & PNG_HAVE_IDAT) + if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) png_ptr->mode |= PNG_AFTER_IDAT; #ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) + if (length > 65535U) { - png_warning(png_ptr, "tEXt chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "too large to fit in memory"); + return; } #endif - png_free(png_ptr, png_ptr->chunkdata); + buffer = png_read_buffer(png_ptr, length+1, 1/*warn*/); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); - - if (png_ptr->chunkdata == NULL) + if (buffer == NULL) { - png_warning(png_ptr, "No memory to process text chunk"); + png_chunk_benign_error(png_ptr, "out of memory"); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + if (png_crc_finish(png_ptr, skip) != 0) return; - } - key = png_ptr->chunkdata; - - key[slength] = 0x00; + key = (png_charp)buffer; + key[length] = 0; for (text = key; *text; text++) /* Empty loop to find end of key */ ; - if (text != key + slength) + if (text != key + length) text++; - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); - - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process text chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr->key = key; - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; - text_ptr->text = text; - text_ptr->text_length = png_strlen(text); + text_info.compression = PNG_TEXT_COMPRESSION_NONE; + text_info.key = key; + text_info.lang = NULL; + text_info.lang_key = NULL; + text_info.itxt_length = 0; + text_info.text = text; + text_info.text_length = strlen(text); - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - png_free(png_ptr, text_ptr); - - if (ret != 0) + if (png_set_text_2(png_ptr, info_ptr, &text_info, 1) != 0) png_warning(png_ptr, "Insufficient memory to process text chunk"); } #endif @@ -2347,13 +2499,11 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) #ifdef PNG_READ_zTXt_SUPPORTED /* Note: this does not correctly handle chunks that are > 64K under DOS */ void /* PRIVATE */ -png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_zTXt(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_textp text_ptr; - png_charp text; - int comp_type; - int ret; - png_size_t slength, prefix_len, data_len; + png_const_charp errmsg = NULL; + png_bytep buffer; + png_uint_32 keyword_length; png_debug(1, "in png_handle_zTXt"); @@ -2368,123 +2518,101 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (--png_ptr->user_chunk_cache_max == 1) { - png_warning(png_ptr, "No space in chunk cache for zTXt"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "no space in chunk cache"); return; } } #endif - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before zTXt"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - if (png_ptr->mode & PNG_HAVE_IDAT) + if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) png_ptr->mode |= PNG_AFTER_IDAT; -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - * there is no hard and fast rule to tell us where to stop. - */ - if (length > (png_uint_32)65535L) + buffer = png_read_buffer(png_ptr, length, 2/*silent*/); + + if (buffer == NULL) { - png_warning(png_ptr, "zTXt chunk too large to fit in memory"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); return; } -#endif - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + png_crc_read(png_ptr, buffer, length); - if (png_ptr->chunkdata == NULL) - { - png_warning(png_ptr, "Out of memory processing zTXt chunk"); + if (png_crc_finish(png_ptr, 0) != 0) return; - } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + /* TODO: also check that the keyword contents match the spec! */ + for (keyword_length = 0; + keyword_length < length && buffer[keyword_length] != 0; + ++keyword_length) + /* Empty loop to find end of name */ ; - png_ptr->chunkdata[slength] = 0x00; + if (keyword_length > 79 || keyword_length < 1) + errmsg = "bad keyword"; - for (text = png_ptr->chunkdata; *text; text++) - /* Empty loop */ ; + /* zTXt must have some LZ data after the keyword, although it may expand to + * zero bytes; we need a '\0' at the end of the keyword, the compression type + * then the LZ data: + */ + else if (keyword_length + 3 > length) + errmsg = "truncated"; - /* zTXt must have some text after the chunkdataword */ - if (slength < 2U || text >= png_ptr->chunkdata + slength - 2U) - { - png_warning(png_ptr, "Truncated zTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + else if (buffer[keyword_length+1] != PNG_COMPRESSION_TYPE_BASE) + errmsg = "unknown compression type"; else { - comp_type = *(++text); - - if (comp_type != PNG_TEXT_COMPRESSION_zTXt) - { - png_warning(png_ptr, "Unknown compression type in zTXt chunk"); - comp_type = PNG_TEXT_COMPRESSION_zTXt; - } - - text++; /* Skip the compression_method byte */ - } - - prefix_len = text - png_ptr->chunkdata; + png_alloc_size_t uncompressed_length = PNG_SIZE_MAX; - png_decompress_chunk(png_ptr, comp_type, - (png_size_t)length, prefix_len, &data_len); + /* TODO: at present png_decompress_chunk imposes a single application + * level memory limit, this should be split to different values for iCCP + * and text chunks. + */ + if (png_decompress_chunk(png_ptr, length, keyword_length+2, + &uncompressed_length, 1/*terminate*/) == Z_STREAM_END) + { + png_text text; - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); + /* It worked; png_ptr->read_buffer now looks like a tEXt chunk except + * for the extra compression type byte and the fact that it isn't + * necessarily '\0' terminated. + */ + buffer = png_ptr->read_buffer; + buffer[uncompressed_length+(keyword_length+2)] = 0; + + text.compression = PNG_TEXT_COMPRESSION_zTXt; + text.key = (png_charp)buffer; + text.text = (png_charp)(buffer + keyword_length+2); + text.text_length = uncompressed_length; + text.itxt_length = 0; + text.lang = NULL; + text.lang_key = NULL; + + if (png_set_text_2(png_ptr, info_ptr, &text, 1) != 0) + errmsg = "insufficient memory"; + } - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process zTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; + else + errmsg = png_ptr->zstream.msg; } - text_ptr->compression = comp_type; - text_ptr->key = png_ptr->chunkdata; - text_ptr->lang = NULL; - text_ptr->lang_key = NULL; - text_ptr->itxt_length = 0; - text_ptr->text = png_ptr->chunkdata + prefix_len; - text_ptr->text_length = data_len; - - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - - if (ret != 0) - png_error(png_ptr, "Insufficient memory to store zTXt chunk"); + if (errmsg != NULL) + png_chunk_benign_error(png_ptr, errmsg); } #endif #ifdef PNG_READ_iTXt_SUPPORTED /* Note: this does not correctly handle chunks that are > 64K under DOS */ void /* PRIVATE */ -png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +png_handle_iTXt(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) { - png_textp text_ptr; - png_charp key, lang, text, lang_key; - int comp_flag; - int comp_type; - int ret; - png_size_t slength, prefix_len, data_len; + png_const_charp errmsg = NULL; + png_bytep buffer; + png_uint_32 prefix_length; png_debug(1, "in png_handle_iTXt"); @@ -2499,292 +2627,393 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) if (--png_ptr->user_chunk_cache_max == 1) { - png_warning(png_ptr, "No space in chunk cache for iTXt"); png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "no space in chunk cache"); return; } } #endif - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before iTXt"); + if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) + png_chunk_error(png_ptr, "missing IHDR"); - if (png_ptr->mode & PNG_HAVE_IDAT) + if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) png_ptr->mode |= PNG_AFTER_IDAT; -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - * there is no hard and fast rule to tell us where to stop. - */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "iTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + buffer = png_read_buffer(png_ptr, length+1, 1/*warn*/); - if (png_ptr->chunkdata == NULL) + if (buffer == NULL) { - png_warning(png_ptr, "No memory to process iTXt chunk"); + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "out of memory"); return; } - slength = length; - png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_crc_read(png_ptr, buffer, length); - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + if (png_crc_finish(png_ptr, 0) != 0) return; - } - - png_ptr->chunkdata[slength] = 0x00; - for (lang = png_ptr->chunkdata; *lang; lang++) + /* First the keyword. */ + for (prefix_length=0; + prefix_length < length && buffer[prefix_length] != 0; + ++prefix_length) /* Empty loop */ ; - lang++; /* Skip NUL separator */ + /* Perform a basic check on the keyword length here. */ + if (prefix_length > 79 || prefix_length < 1) + errmsg = "bad keyword"; - /* iTXt must have a language tag (possibly empty), two compression bytes, - * translated keyword (possibly empty), and possibly some text after the - * keyword + /* Expect keyword, compression flag, compression type, language, translated + * keyword (both may be empty but are 0 terminated) then the text, which may + * be empty. */ + else if (prefix_length + 5 > length) + errmsg = "truncated"; - if (slength < 3U || lang >= png_ptr->chunkdata + slength - 3U) + else if (buffer[prefix_length+1] == 0 || + (buffer[prefix_length+1] == 1 && + buffer[prefix_length+2] == PNG_COMPRESSION_TYPE_BASE)) { - png_warning(png_ptr, "Truncated iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - - comp_flag = *lang++; - comp_type = *lang++; + int compressed = buffer[prefix_length+1] != 0; + png_uint_32 language_offset, translated_keyword_offset; + png_alloc_size_t uncompressed_length = 0; - /* 1.5.14: The spec says "for uncompressed text decoders shall ignore [the - * compression type]". The compression flag shall be 0 (no compression) or - * 1 (compressed with method 0 - deflate.) - */ - if (comp_flag/*compressed*/ != 0) - { - if (comp_flag != 1) - { - png_warning(png_ptr, "invalid iTXt compression flag"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + /* Now the language tag */ + prefix_length += 3; + language_offset = prefix_length; - if (comp_type != 0) - { - png_warning(png_ptr, "unknown iTXt compression type"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } - } + for (; prefix_length < length && buffer[prefix_length] != 0; + ++prefix_length) + /* Empty loop */ ; - for (lang_key = lang; *lang_key; lang_key++) - /* Empty loop */ ; + /* WARNING: the length may be invalid here, this is checked below. */ + translated_keyword_offset = ++prefix_length; - lang_key++; /* Skip NUL separator */ + for (; prefix_length < length && buffer[prefix_length] != 0; + ++prefix_length) + /* Empty loop */ ; - if (lang_key >= png_ptr->chunkdata + slength) - { - png_warning(png_ptr, "Truncated iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + /* prefix_length should now be at the trailing '\0' of the translated + * keyword, but it may already be over the end. None of this arithmetic + * can overflow because chunks are at most 2^31 bytes long, but on 16-bit + * systems the available allocation may overflow. + */ + ++prefix_length; - for (text = lang_key; *text; text++) - /* Empty loop */ ; + if (compressed == 0 && prefix_length <= length) + uncompressed_length = length - prefix_length; - text++; /* Skip NUL separator */ + else if (compressed != 0 && prefix_length < length) + { + uncompressed_length = PNG_SIZE_MAX; - if (text >= png_ptr->chunkdata + slength) - { - png_warning(png_ptr, "Malformed iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + /* TODO: at present png_decompress_chunk imposes a single application + * level memory limit, this should be split to different values for + * iCCP and text chunks. + */ + if (png_decompress_chunk(png_ptr, length, prefix_length, + &uncompressed_length, 1/*terminate*/) == Z_STREAM_END) + buffer = png_ptr->read_buffer; - prefix_len = text - png_ptr->chunkdata; + else + errmsg = png_ptr->zstream.msg; + } - key=png_ptr->chunkdata; + else + errmsg = "truncated"; - if (comp_flag/*compressed*/) - png_decompress_chunk(png_ptr, comp_type, - (size_t)length, prefix_len, &data_len); + if (errmsg == NULL) + { + png_text text; - else - data_len = png_strlen(png_ptr->chunkdata + prefix_len); + buffer[uncompressed_length+prefix_length] = 0; - text_ptr = (png_textp)png_malloc_warn(png_ptr, - png_sizeof(png_text)); + if (compressed == 0) + text.compression = PNG_ITXT_COMPRESSION_NONE; - if (text_ptr == NULL) - { - png_warning(png_ptr, "Not enough memory to process iTXt chunk"); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; - return; - } + else + text.compression = PNG_ITXT_COMPRESSION_zTXt; - text_ptr->compression = - (comp_flag ? PNG_ITXT_COMPRESSION_zTXt : PNG_ITXT_COMPRESSION_NONE); - text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key); - text_ptr->lang = png_ptr->chunkdata + (lang - key); - text_ptr->itxt_length = data_len; - text_ptr->text_length = 0; - text_ptr->key = png_ptr->chunkdata; - text_ptr->text = png_ptr->chunkdata + prefix_len; + text.key = (png_charp)buffer; + text.lang = (png_charp)buffer + language_offset; + text.lang_key = (png_charp)buffer + translated_keyword_offset; + text.text = (png_charp)buffer + prefix_length; + text.text_length = 0; + text.itxt_length = uncompressed_length; - ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); + if (png_set_text_2(png_ptr, info_ptr, &text, 1) != 0) + errmsg = "insufficient memory"; + } + } - png_free(png_ptr, text_ptr); - png_free(png_ptr, png_ptr->chunkdata); - png_ptr->chunkdata = NULL; + else + errmsg = "bad compression info"; - if (ret != 0) - png_error(png_ptr, "Insufficient memory to store iTXt chunk"); + if (errmsg != NULL) + png_chunk_benign_error(png_ptr, errmsg); } #endif -/* This function is called when we haven't found a handler for a - * chunk. If there isn't a problem with the chunk itself (ie bad - * chunk name, CRC, or a critical chunk), the chunk is silently ignored - * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which - * case it will be saved away to be written out later. - */ -void /* PRIVATE */ -png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED +/* Utility function for png_handle_unknown; set up png_ptr::unknown_chunk */ +static int +png_cache_unknown_chunk(png_structrp png_ptr, png_uint_32 length) { - png_uint_32 skip = 0; + png_alloc_size_t limit = PNG_SIZE_MAX; - png_debug(1, "in png_handle_unknown"); + if (png_ptr->unknown_chunk.data != NULL) + { + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; + } -#ifdef PNG_USER_LIMITS_SUPPORTED - if (png_ptr->user_chunk_cache_max != 0) +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (png_ptr->user_chunk_malloc_max > 0 && + png_ptr->user_chunk_malloc_max < limit) + limit = png_ptr->user_chunk_malloc_max; + +# elif PNG_USER_CHUNK_MALLOC_MAX > 0 + if (PNG_USER_CHUNK_MALLOC_MAX < limit) + limit = PNG_USER_CHUNK_MALLOC_MAX; +# endif + + if (length <= limit) { - if (png_ptr->user_chunk_cache_max == 1) - { - png_crc_finish(png_ptr, length); - return; - } + PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name); + /* The following is safe because of the PNG_SIZE_MAX init above */ + png_ptr->unknown_chunk.size = (png_size_t)length/*SAFE*/; + /* 'mode' is a flag array, only the bottom four bits matter here */ + png_ptr->unknown_chunk.location = (png_byte)png_ptr->mode/*SAFE*/; - if (--png_ptr->user_chunk_cache_max == 1) + if (length == 0) + png_ptr->unknown_chunk.data = NULL; + + else { - png_warning(png_ptr, "No space in chunk cache for unknown chunk"); - png_crc_finish(png_ptr, length); - return; + /* Do a 'warn' here - it is handled below. */ + png_ptr->unknown_chunk.data = png_voidcast(png_bytep, + png_malloc_warn(png_ptr, length)); } } -#endif - if (png_ptr->mode & PNG_HAVE_IDAT) + if (png_ptr->unknown_chunk.data == NULL && length > 0) { - if (png_ptr->chunk_name != png_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; + /* This is benign because we clean up correctly */ + png_crc_finish(png_ptr, length); + png_chunk_benign_error(png_ptr, "unknown chunk exceeds memory limits"); + return 0; } - if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + else { -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED - && png_ptr->read_user_chunk_fn == NULL -#endif - ) -#endif - png_chunk_error(png_ptr, "unknown critical chunk"); + if (length > 0) + png_crc_read(png_ptr, png_ptr->unknown_chunk.data, length); + png_crc_finish(png_ptr, 0); + return 1; } +} +#endif /* READ_UNKNOWN_CHUNKS */ -#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED - if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED - || (png_ptr->read_user_chunk_fn != NULL) -#endif - ) - { -#ifdef PNG_MAX_MALLOC_64K - if (length > 65535) - { - png_warning(png_ptr, "unknown chunk too large to fit in memory"); - skip = length - 65535; - length = 65535; - } -#endif - - /* TODO: this code is very close to the unknown handling in pngpread.c, - * maybe it can be put into a common utility routine? - * png_struct::unknown_chunk is just used as a temporary variable, along - * with the data into which the chunk is read. These can be eliminated. - */ - PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name); - png_ptr->unknown_chunk.size = (png_size_t)length; +/* Handle an unknown, or known but disabled, chunk */ +void /* PRIVATE */ +png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr, + png_uint_32 length, int keep) +{ + int handled = 0; /* the chunk was handled */ - if (length == 0) - png_ptr->unknown_chunk.data = NULL; + png_debug(1, "in png_handle_unknown"); - else - { - png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length); - png_crc_read(png_ptr, png_ptr->unknown_chunk.data, length); - } +#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + /* NOTE: this code is based on the code in libpng-1.4.12 except for fixing + * the bug which meant that setting a non-default behavior for a specific + * chunk would be ignored (the default was always used unless a user + * callback was installed). + * + * 'keep' is the value from the png_chunk_unknown_handling, the setting for + * this specific chunk_name, if PNG_HANDLE_AS_UNKNOWN_SUPPORTED, if not it + * will always be PNG_HANDLE_CHUNK_AS_DEFAULT and it needs to be set here. + * This is just an optimization to avoid multiple calls to the lookup + * function. + */ +# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +# ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED + keep = png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name); +# endif +# endif -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED - if (png_ptr->read_user_chunk_fn != NULL) + /* One of the following methods will read the chunk or skip it (at least one + * of these is always defined because this is the only way to switch on + * PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) + */ +# ifdef PNG_READ_USER_CHUNKS_SUPPORTED + /* The user callback takes precedence over the chunk keep value, but the + * keep value is still required to validate a save of a critical chunk. + */ + if (png_ptr->read_user_chunk_fn != NULL) + { + if (png_cache_unknown_chunk(png_ptr, length) != 0) { /* Callback to user unknown chunk handler */ - int ret; - - ret = (*(png_ptr->read_user_chunk_fn)) - (png_ptr, &png_ptr->unknown_chunk); - + int ret = (*(png_ptr->read_user_chunk_fn))(png_ptr, + &png_ptr->unknown_chunk); + + /* ret is: + * negative: An error occurred; png_chunk_error will be called. + * zero: The chunk was not handled, the chunk will be discarded + * unless png_set_keep_unknown_chunks has been used to set + * a 'keep' behavior for this particular chunk, in which + * case that will be used. A critical chunk will cause an + * error at this point unless it is to be saved. + * positive: The chunk was handled, libpng will ignore/discard it. + */ if (ret < 0) png_chunk_error(png_ptr, "error in user chunk"); - if (ret == 0) + else if (ret == 0) { - if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + /* If the keep value is 'default' or 'never' override it, but + * still error out on critical chunks unless the keep value is + * 'always' While this is weird it is the behavior in 1.4.12. + * A possible improvement would be to obey the value set for the + * chunk, but this would be an API change that would probably + * damage some applications. + * + * The png_app_warning below catches the case that matters, where + * the application has not set specific save or ignore for this + * chunk or global save or ignore. + */ + if (keep < PNG_HANDLE_CHUNK_IF_SAFE) { -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != - PNG_HANDLE_CHUNK_ALWAYS) -#endif - png_chunk_error(png_ptr, "unknown critical chunk"); +# ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED + if (png_ptr->unknown_default < PNG_HANDLE_CHUNK_IF_SAFE) + { + png_chunk_warning(png_ptr, "Saving unknown chunk:"); + png_app_warning(png_ptr, + "forcing save of an unhandled chunk;" + " please call png_set_keep_unknown_chunks"); + /* with keep = PNG_HANDLE_CHUNK_IF_SAFE */ + } +# endif + keep = PNG_HANDLE_CHUNK_IF_SAFE; } + } - png_set_unknown_chunks(png_ptr, info_ptr, - &png_ptr->unknown_chunk, 1); + else /* chunk was handled */ + { + handled = 1; + /* Critical chunks can be safely discarded at this point. */ + keep = PNG_HANDLE_CHUNK_NEVER; } } else -#endif - png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); - - png_free(png_ptr, png_ptr->unknown_chunk.data); - png_ptr->unknown_chunk.data = NULL; + keep = PNG_HANDLE_CHUNK_NEVER; /* insufficient memory */ } else -#endif - skip = length; + /* Use the SAVE_UNKNOWN_CHUNKS code or skip the chunk */ +# endif /* READ_USER_CHUNKS */ - png_crc_finish(png_ptr, skip); +# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED + { + /* keep is currently just the per-chunk setting, if there was no + * setting change it to the global default now (not that this may + * still be AS_DEFAULT) then obtain the cache of the chunk if required, + * if not simply skip the chunk. + */ + if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT) + keep = png_ptr->unknown_default; -#ifndef PNG_READ_USER_CHUNKS_SUPPORTED - PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ -#endif + if (keep == PNG_HANDLE_CHUNK_ALWAYS || + (keep == PNG_HANDLE_CHUNK_IF_SAFE && + PNG_CHUNK_ANCILLARY(png_ptr->chunk_name))) + { + if (png_cache_unknown_chunk(png_ptr, length) == 0) + keep = PNG_HANDLE_CHUNK_NEVER; + } + + else + png_crc_finish(png_ptr, length); + } +# else +# ifndef PNG_READ_USER_CHUNKS_SUPPORTED +# error no method to support READ_UNKNOWN_CHUNKS +# endif + + { + /* If here there is no read callback pointer set and no support is + * compiled in to just save the unknown chunks, so simply skip this + * chunk. If 'keep' is something other than AS_DEFAULT or NEVER then + * the app has erroneously asked for unknown chunk saving when there + * is no support. + */ + if (keep > PNG_HANDLE_CHUNK_NEVER) + png_app_error(png_ptr, "no unknown chunk support available"); + + png_crc_finish(png_ptr, length); + } +# endif + +# ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED + /* Now store the chunk in the chunk list if appropriate, and if the limits + * permit it. + */ + if (keep == PNG_HANDLE_CHUNK_ALWAYS || + (keep == PNG_HANDLE_CHUNK_IF_SAFE && + PNG_CHUNK_ANCILLARY(png_ptr->chunk_name))) + { +# ifdef PNG_USER_LIMITS_SUPPORTED + switch (png_ptr->user_chunk_cache_max) + { + case 2: + png_ptr->user_chunk_cache_max = 1; + png_chunk_benign_error(png_ptr, "no space in chunk cache"); + /* FALL THROUGH */ + case 1: + /* NOTE: prior to 1.6.0 this case resulted in an unknown critical + * chunk being skipped, now there will be a hard error below. + */ + break; + + default: /* not at limit */ + --(png_ptr->user_chunk_cache_max); + /* FALL THROUGH */ + case 0: /* no limit */ +# endif /* USER_LIMITS */ + /* Here when the limit isn't reached or when limits are compiled + * out; store the chunk. + */ + png_set_unknown_chunks(png_ptr, info_ptr, + &png_ptr->unknown_chunk, 1); + handled = 1; +# ifdef PNG_USER_LIMITS_SUPPORTED + break; + } +# endif + } +# else /* no store support: the chunk must be handled by the user callback */ + PNG_UNUSED(info_ptr) +# endif + + /* Regardless of the error handling below the cached data (if any) can be + * freed now. Notice that the data is not freed if there is a png_error, but + * it will be freed by destroy_read_struct. + */ + if (png_ptr->unknown_chunk.data != NULL) + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; + +#else /* !PNG_READ_UNKNOWN_CHUNKS_SUPPORTED */ + /* There is no support to read an unknown chunk, so just skip it. */ + png_crc_finish(png_ptr, length); + PNG_UNUSED(info_ptr) + PNG_UNUSED(keep) +#endif /* !READ_UNKNOWN_CHUNKS */ + + /* Check for unhandled critical chunks */ + if (handled == 0 && PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + png_chunk_error(png_ptr, "unhandled critical chunk"); } /* This function is called to verify that a chunk name is valid. @@ -2800,7 +3029,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) */ void /* PRIVATE */ -png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name) +png_check_chunk_name(png_structrp png_ptr, png_uint_32 chunk_name) { int i; @@ -2825,7 +3054,7 @@ png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name) * 'display' is false only those pixels present in the pass are filled in. */ void /* PRIVATE */ -png_combine_row(png_structp png_ptr, png_bytep dp, int display) +png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display) { unsigned int pixel_depth = png_ptr->transformed_pixel_depth; png_const_bytep sp = png_ptr->row_buf + 1; @@ -2866,26 +3095,28 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1; end_byte = *end_ptr; # ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) /* little-endian byte */ - end_mask = 0xff << end_mask; + if ((png_ptr->transformations & PNG_PACKSWAP) != 0) + /* little-endian byte */ + end_mask = 0xff << end_mask; - else /* big-endian byte */ + else /* big-endian byte */ # endif - end_mask = 0xff >> end_mask; + end_mask = 0xff >> end_mask; /* end_mask is now the bits to *keep* from the destination row */ } - /* For non-interlaced images this reduces to a png_memcpy(). A png_memcpy() + /* For non-interlaced images this reduces to a memcpy(). A memcpy() * will also happen if interlacing isn't supported or if the application * does not call png_set_interlace_handling(). In the latter cases the * caller just gets a sequence of the unexpanded rows from each interlace * pass. */ #ifdef PNG_READ_INTERLACING_SUPPORTED - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE) && - pass < 6 && (display == 0 || - /* The following copies everything for 'display' on passes 0, 2 and 4. */ - (display == 1 && (pass & 1) != 0))) + if (png_ptr->interlaced != 0 && + (png_ptr->transformations & PNG_INTERLACE) != 0 && + pass < 6 && (display == 0 || + /* The following copies everything for 'display' on passes 0, 2 and 4. */ + (display == 1 && (pass & 1) != 0))) { /* Narrow images may have no bits in a pass; the caller should handle * this, but this test is cheap: @@ -3017,10 +3248,10 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) */ # define MASK(pass,depth,display,png)\ ((display)?B_MASK(pass,depth,png):S_MASK(pass,depth,png)) -#endif /* !PNG_USE_COMPILE_TIME_MASKS */ +#endif /* !USE_COMPILE_TIME_MASKS */ /* Use the appropriate mask to copy the required bits. In some cases - * the byte mask will be 0 or 0xff, optimize these cases. row_width is + * the byte mask will be 0 or 0xff; optimize these cases. row_width is * the number of pixels, but the code copies bytes, so it is necessary * to special case the end. */ @@ -3028,12 +3259,12 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) png_uint_32 mask; # ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - mask = MASK(pass, pixel_depth, display, 0); + if ((png_ptr->transformations & PNG_PACKSWAP) != 0) + mask = MASK(pass, pixel_depth, display, 0); - else + else # endif - mask = MASK(pass, pixel_depth, display, 1); + mask = MASK(pass, pixel_depth, display, 1); for (;;) { @@ -3159,7 +3390,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) /* This can only be the RGB case, so each copy is exactly one * pixel and it is not necessary to check for a partial copy. */ - for(;;) + for (;;) { dp[0] = sp[0], dp[1] = sp[1], dp[2] = sp[2]; @@ -3176,26 +3407,27 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) /* Check for double byte alignment and, if possible, use a * 16-bit copy. Don't attempt this for narrow images - ones that * are less than an interlace panel wide. Don't attempt it for - * wide bytes_to_copy either - use the png_memcpy there. + * wide bytes_to_copy either - use the memcpy there. */ - if (bytes_to_copy < 16 /*else use png_memcpy*/ && - png_isaligned(dp, png_uint_16) && - png_isaligned(sp, png_uint_16) && - bytes_to_copy % sizeof (png_uint_16) == 0 && - bytes_to_jump % sizeof (png_uint_16) == 0) + if (bytes_to_copy < 16 /*else use memcpy*/ && + png_isaligned(dp, png_uint_16) && + png_isaligned(sp, png_uint_16) && + bytes_to_copy % (sizeof (png_uint_16)) == 0 && + bytes_to_jump % (sizeof (png_uint_16)) == 0) { /* Everything is aligned for png_uint_16 copies, but try for * png_uint_32 first. */ - if (png_isaligned(dp, png_uint_32) && - png_isaligned(sp, png_uint_32) && - bytes_to_copy % sizeof (png_uint_32) == 0 && - bytes_to_jump % sizeof (png_uint_32) == 0) + if (png_isaligned(dp, png_uint_32) != 0 && + png_isaligned(sp, png_uint_32) != 0 && + bytes_to_copy % (sizeof (png_uint_32)) == 0 && + bytes_to_jump % (sizeof (png_uint_32)) == 0) { - png_uint_32p dp32 = (png_uint_32p)dp; - png_const_uint_32p sp32 = (png_const_uint_32p)sp; + png_uint_32p dp32 = png_aligncast(png_uint_32p,dp); + png_const_uint_32p sp32 = png_aligncastconst( + png_const_uint_32p, sp); size_t skip = (bytes_to_jump-bytes_to_copy) / - sizeof (png_uint_32); + (sizeof (png_uint_32)); do { @@ -3203,7 +3435,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) do { *dp32++ = *sp32++; - c -= sizeof (png_uint_32); + c -= (sizeof (png_uint_32)); } while (c > 0); @@ -3233,10 +3465,11 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) */ else { - png_uint_16p dp16 = (png_uint_16p)dp; - png_const_uint_16p sp16 = (png_const_uint_16p)sp; + png_uint_16p dp16 = png_aligncast(png_uint_16p, dp); + png_const_uint_16p sp16 = png_aligncastconst( + png_const_uint_16p, sp); size_t skip = (bytes_to_jump-bytes_to_copy) / - sizeof (png_uint_16); + (sizeof (png_uint_16)); do { @@ -3244,7 +3477,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) do { *dp16++ = *sp16++; - c -= sizeof (png_uint_16); + c -= (sizeof (png_uint_16)); } while (c > 0); @@ -3266,12 +3499,12 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) return; } } -#endif /* PNG_ALIGN_ code */ +#endif /* ALIGN_TYPE code */ - /* The true default - use a png_memcpy: */ + /* The true default - use a memcpy: */ for (;;) { - png_memcpy(dp, sp, bytes_to_copy); + memcpy(dp, sp, bytes_to_copy); if (row_width <= bytes_to_jump) return; @@ -3290,13 +3523,13 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display) /* Here if pixel_depth < 8 to check 'end_ptr' below. */ } else -#endif +#endif /* READ_INTERLACING */ - /* If here then the switch above wasn't used so just png_memcpy the whole row + /* If here then the switch above wasn't used so just memcpy the whole row * from the temporary row buffer (notice that this overwrites the end of the * destination row if it is a partial byte.) */ - png_memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width)); + memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width)); /* Restore the overwritten bits from the last byte if necessary. */ if (end_ptr != NULL) @@ -3333,7 +3566,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, int j; #ifdef PNG_READ_PACKSWAP_SUPPORTED - if (transformations & PNG_PACKSWAP) + if ((transformations & PNG_PACKSWAP) != 0) { sshift = (int)((row_info->width + 7) & 0x07); dshift = (int)((final_width + 7) & 0x07); @@ -3357,8 +3590,9 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, v = (png_byte)((*sp >> sshift) & 0x01); for (j = 0; j < jstop; j++) { - *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); + unsigned int tmp = *dp & (0x7f7f >> (7 - dshift)); + tmp |= v << dshift; + *dp = (png_byte)(tmp & 0xff); if (dshift == s_end) { @@ -3392,7 +3626,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, png_uint_32 i; #ifdef PNG_READ_PACKSWAP_SUPPORTED - if (transformations & PNG_PACKSWAP) + if ((transformations & PNG_PACKSWAP) != 0) { sshift = (int)(((row_info->width + 3) & 0x03) << 1); dshift = (int)(((final_width + 3) & 0x03) << 1); @@ -3419,8 +3653,9 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, v = (png_byte)((*sp >> sshift) & 0x03); for (j = 0; j < jstop; j++) { - *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); + unsigned int tmp = *dp & (0x3f3f >> (6 - dshift)); + tmp |= v << dshift; + *dp = (png_byte)(tmp & 0xff); if (dshift == s_end) { @@ -3454,7 +3689,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, int jstop = png_pass_inc[pass]; #ifdef PNG_READ_PACKSWAP_SUPPORTED - if (transformations & PNG_PACKSWAP) + if ((transformations & PNG_PACKSWAP) != 0) { sshift = (int)(((row_info->width + 1) & 0x01) << 2); dshift = (int)(((final_width + 1) & 0x01) << 2); @@ -3480,8 +3715,9 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, for (j = 0; j < jstop; j++) { - *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); + unsigned int tmp = *dp & (0xf0f >> (4 - dshift)); + tmp |= v << dshift; + *dp = (png_byte)(tmp & 0xff); if (dshift == s_end) { @@ -3522,11 +3758,11 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, png_byte v[8]; /* SAFE; pixel_depth does not exceed 64 */ int j; - png_memcpy(v, sp, pixel_bytes); + memcpy(v, sp, pixel_bytes); for (j = 0; j < jstop; j++) { - png_memcpy(dp, v, pixel_bytes); + memcpy(dp, v, pixel_bytes); dp -= pixel_bytes; } @@ -3543,7 +3779,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, PNG_UNUSED(transformations) /* Silence compiler warning */ #endif } -#endif /* PNG_READ_INTERLACING_SUPPORTED */ +#endif /* READ_INTERLACING */ static void png_read_filter_row_sub(png_row_infop row_info, png_bytep row, @@ -3629,15 +3865,15 @@ png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row, p = b - c; pc = a - c; -# ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -# else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -# endif +#ifdef PNG_USE_ABS + pa = abs(p); + pb = abs(pc); + pc = abs(p + pc); +#else + pa = p < 0 ? -p : p; + pb = pc < 0 ? -pc : pc; + pc = (p + pc) < 0 ? -(p + pc) : p + pc; +#endif /* Find the best predictor, the least of pa, pb, pc favoring the earlier * ones in the case of a tie. @@ -3684,27 +3920,35 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row, p = b - c; pc = a - c; -# ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -# else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -# endif +#ifdef PNG_USE_ABS + pa = abs(p); + pb = abs(pc); + pc = abs(p + pc); +#else + pa = p < 0 ? -p : p; + pb = pc < 0 ? -pc : pc; + pc = (p + pc) < 0 ? -(p + pc) : p + pc; +#endif if (pb < pa) pa = pb, a = b; if (pc < pa) a = c; - c = b; a += *row; *row++ = (png_byte)a; } } static void -png_init_filter_functions(png_structp pp) +png_init_filter_functions(png_structrp pp) + /* This function is called once for every PNG image (except for PNG images + * that only use PNG_FILTER_VALUE_NONE for all rows) to set the + * implementations required to reverse the filtering of PNG rows. Reversing + * the filter is the first transformation performed on the row data. It is + * performed in place, therefore an implementation can be selected based on + * the image pixel format. If the implementation depends on image width then + * take care to ensure that it works correctly if the image is interlaced - + * interlacing causes the actual row width to vary. + */ { unsigned int bpp = (pp->pixel_depth + 7) >> 3; @@ -3732,9 +3976,13 @@ png_init_filter_functions(png_structp pp) } void /* PRIVATE */ -png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row, +png_read_filter_row(png_structrp pp, png_row_infop row_info, png_bytep row, png_const_bytep prev_row, int filter) { + /* OPTIMIZATION: DO NOT MODIFY THIS FUNCTION, instead #define + * PNG_FILTER_OPTIMIZATIONS to a function that overrides the generic + * implementations. See png_init_filter_functions above. + */ if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST) { if (pp->read_filter[0] == NULL) @@ -3746,9 +3994,185 @@ png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row, #ifdef PNG_SEQUENTIAL_READ_SUPPORTED void /* PRIVATE */ -png_read_finish_row(png_structp png_ptr) +png_read_IDAT_data(png_structrp png_ptr, png_bytep output, + png_alloc_size_t avail_out) +{ + /* Loop reading IDATs and decompressing the result into output[avail_out] */ + png_ptr->zstream.next_out = output; + png_ptr->zstream.avail_out = 0; /* safety: set below */ + + if (output == NULL) + avail_out = 0; + + do + { + int ret; + png_byte tmpbuf[PNG_INFLATE_BUF_SIZE]; + + if (png_ptr->zstream.avail_in == 0) + { + uInt avail_in; + png_bytep buffer; + + while (png_ptr->idat_size == 0) + { + png_crc_finish(png_ptr, 0); + + png_ptr->idat_size = png_read_chunk_header(png_ptr); + /* This is an error even in the 'check' case because the code just + * consumed a non-IDAT header. + */ + if (png_ptr->chunk_name != png_IDAT) + png_error(png_ptr, "Not enough image data"); + } + + avail_in = png_ptr->IDAT_read_size; + + if (avail_in > png_ptr->idat_size) + avail_in = (uInt)png_ptr->idat_size; + + /* A PNG with a gradually increasing IDAT size will defeat this attempt + * to minimize memory usage by causing lots of re-allocs, but + * realistically doing IDAT_read_size re-allocs is not likely to be a + * big problem. + */ + buffer = png_read_buffer(png_ptr, avail_in, 0/*error*/); + + png_crc_read(png_ptr, buffer, avail_in); + png_ptr->idat_size -= avail_in; + + png_ptr->zstream.next_in = buffer; + png_ptr->zstream.avail_in = avail_in; + } + + /* And set up the output side. */ + if (output != NULL) /* standard read */ + { + uInt out = ZLIB_IO_MAX; + + if (out > avail_out) + out = (uInt)avail_out; + + avail_out -= out; + png_ptr->zstream.avail_out = out; + } + + else /* after last row, checking for end */ + { + png_ptr->zstream.next_out = tmpbuf; + png_ptr->zstream.avail_out = (sizeof tmpbuf); + } + + /* Use NO_FLUSH; this gives zlib the maximum opportunity to optimize the + * process. If the LZ stream is truncated the sequential reader will + * terminally damage the stream, above, by reading the chunk header of the + * following chunk (it then exits with png_error). + * + * TODO: deal more elegantly with truncated IDAT lists. + */ + ret = PNG_INFLATE(png_ptr, Z_NO_FLUSH); + + /* Take the unconsumed output back. */ + if (output != NULL) + avail_out += png_ptr->zstream.avail_out; + + else /* avail_out counts the extra bytes */ + avail_out += (sizeof tmpbuf) - png_ptr->zstream.avail_out; + + png_ptr->zstream.avail_out = 0; + + if (ret == Z_STREAM_END) + { + /* Do this for safety; we won't read any more into this row. */ + png_ptr->zstream.next_out = NULL; + + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + + if (png_ptr->zstream.avail_in > 0 || png_ptr->idat_size > 0) + png_chunk_benign_error(png_ptr, "Extra compressed data"); + break; + } + + if (ret != Z_OK) + { + png_zstream_error(png_ptr, ret); + + if (output != NULL) + png_chunk_error(png_ptr, png_ptr->zstream.msg); + + else /* checking */ + { + png_chunk_benign_error(png_ptr, png_ptr->zstream.msg); + return; + } + } + } while (avail_out > 0); + + if (avail_out > 0) + { + /* The stream ended before the image; this is the same as too few IDATs so + * should be handled the same way. + */ + if (output != NULL) + png_error(png_ptr, "Not enough image data"); + + else /* the deflate stream contained extra data */ + png_chunk_benign_error(png_ptr, "Too much image data"); + } +} + +void /* PRIVATE */ +png_read_finish_IDAT(png_structrp png_ptr) +{ + /* We don't need any more data and the stream should have ended, however the + * LZ end code may actually not have been processed. In this case we must + * read it otherwise stray unread IDAT data or, more likely, an IDAT chunk + * may still remain to be consumed. + */ + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0) + { + /* The NULL causes png_read_IDAT_data to swallow any remaining bytes in + * the compressed stream, but the stream may be damaged too, so even after + * this call we may need to terminate the zstream ownership. + */ + png_read_IDAT_data(png_ptr, NULL, 0); + png_ptr->zstream.next_out = NULL; /* safety */ + + /* Now clear everything out for safety; the following may not have been + * done. + */ + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0) + { + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; + } + } + + /* If the zstream has not been released do it now *and* terminate the reading + * of the final IDAT chunk. + */ + if (png_ptr->zowner == png_IDAT) + { + /* Always do this; the pointers otherwise point into the read buffer. */ + png_ptr->zstream.next_in = NULL; + png_ptr->zstream.avail_in = 0; + + /* Now we no longer own the zstream. */ + png_ptr->zowner = 0; + + /* The slightly weird semantics of the sequential IDAT reading is that we + * are always in or at the end of an IDAT chunk, so we always need to do a + * crc_finish here. If idat_size is non-zero we also need to read the + * spurious bytes at the end of the chunk now. + */ + (void)png_crc_finish(png_ptr, png_ptr->idat_size); + } +} + +void /* PRIVATE */ +png_read_finish_row(png_structrp png_ptr) { -#ifdef PNG_READ_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ @@ -3762,22 +4186,20 @@ png_read_finish_row(png_structp png_ptr) /* Offset to next interlace block in the y direction */ static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif /* PNG_READ_INTERLACING_SUPPORTED */ png_debug(1, "in png_read_finish_row"); png_ptr->row_number++; if (png_ptr->row_number < png_ptr->num_rows) return; -#ifdef PNG_READ_INTERLACING_SUPPORTED - if (png_ptr->interlaced) + if (png_ptr->interlaced != 0) { png_ptr->row_number = 0; /* TO DO: don't do this if prev_row isn't needed (requires * read-ahead of the next row's filter byte. */ - png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); do { @@ -3791,7 +4213,7 @@ png_read_finish_row(png_structp png_ptr) png_pass_start[png_ptr->pass]) / png_pass_inc[png_ptr->pass]; - if (!(png_ptr->transformations & PNG_INTERLACE)) + if ((png_ptr->transformations & PNG_INTERLACE) == 0) { png_ptr->num_rows = (png_ptr->height + png_pass_yinc[png_ptr->pass] - 1 - @@ -3807,80 +4229,15 @@ png_read_finish_row(png_structp png_ptr) if (png_ptr->pass < 7) return; } -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - { - char extra; - int ret; - - png_ptr->zstream.next_out = (Byte *)&extra; - png_ptr->zstream.avail_out = (uInt)1; - - for (;;) - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_crc_finish(png_ptr, 0); - png_ptr->idat_size = png_read_chunk_header(png_ptr); - if (png_ptr->chunk_name != png_IDAT) - png_error(png_ptr, "Not enough image data"); - } - - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - - if (ret == Z_STREAM_END) - { - if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_warning(png_ptr, "Extra compressed data"); - - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression Error"); - - if (!(png_ptr->zstream.avail_out)) - { - png_warning(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - - } - png_ptr->zstream.avail_out = 0; - } - if (png_ptr->idat_size || png_ptr->zstream.avail_in) - png_warning(png_ptr, "Extra compression data"); - - inflateReset(&png_ptr->zstream); - - png_ptr->mode |= PNG_AFTER_IDAT; + /* Here after at the end of the last row of the last pass. */ + png_read_finish_IDAT(png_ptr); } -#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ +#endif /* SEQUENTIAL_READ */ void /* PRIVATE */ -png_read_start_row(png_structp png_ptr) +png_read_start_row(png_structrp png_ptr) { -#ifdef PNG_READ_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Start of interlace block */ @@ -3894,20 +4251,18 @@ png_read_start_row(png_structp png_ptr) /* Offset to next interlace block in the y direction */ static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; -#endif int max_pixel_depth; png_size_t row_bytes; png_debug(1, "in png_read_start_row"); - png_ptr->zstream.avail_in = 0; + #ifdef PNG_READ_TRANSFORMS_SUPPORTED png_init_read_transformations(png_ptr); #endif -#ifdef PNG_READ_INTERLACING_SUPPORTED - if (png_ptr->interlaced) + if (png_ptr->interlaced != 0) { - if (!(png_ptr->transformations & PNG_INTERLACE)) + if ((png_ptr->transformations & PNG_INTERLACE) == 0) png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - png_pass_ystart[0]) / png_pass_yinc[0]; @@ -3921,7 +4276,6 @@ png_read_start_row(png_structp png_ptr) } else -#endif /* PNG_READ_INTERLACING_SUPPORTED */ { png_ptr->num_rows = png_ptr->height; png_ptr->iwidth = png_ptr->width; @@ -3929,7 +4283,7 @@ png_read_start_row(png_structp png_ptr) max_pixel_depth = png_ptr->pixel_depth; - /* WARNING: * png_read_transform_info (pngrtran.c) performs a simpliar set of + /* WARNING: * png_read_transform_info (pngrtran.c) performs a simpler set of * calculations to calculate the final pixel depth, then * png_do_read_transforms actually does the transforms. This means that the * code which effectively calculates this value is actually repeated in three @@ -3940,16 +4294,16 @@ png_read_start_row(png_structp png_ptr) * TODO: fix this. */ #ifdef PNG_READ_PACK_SUPPORTED - if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8) + if ((png_ptr->transformations & PNG_PACK) != 0 && png_ptr->bit_depth < 8) max_pixel_depth = 8; #endif #ifdef PNG_READ_EXPAND_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND) + if ((png_ptr->transformations & PNG_EXPAND) != 0) { if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { - if (png_ptr->num_trans) + if (png_ptr->num_trans != 0) max_pixel_depth = 32; else @@ -3961,13 +4315,13 @@ png_read_start_row(png_structp png_ptr) if (max_pixel_depth < 8) max_pixel_depth = 8; - if (png_ptr->num_trans) + if (png_ptr->num_trans != 0) max_pixel_depth *= 2; } else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) { - if (png_ptr->num_trans) + if (png_ptr->num_trans != 0) { max_pixel_depth *= 4; max_pixel_depth /= 3; @@ -3977,25 +4331,25 @@ png_read_start_row(png_structp png_ptr) #endif #ifdef PNG_READ_EXPAND_16_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND_16) + if ((png_ptr->transformations & PNG_EXPAND_16) != 0) { -# ifdef PNG_READ_EXPAND_SUPPORTED - /* In fact it is an error if it isn't supported, but checking is - * the safe way. - */ - if (png_ptr->transformations & PNG_EXPAND) - { - if (png_ptr->bit_depth < 16) - max_pixel_depth *= 2; - } - else -# endif - png_ptr->transformations &= ~PNG_EXPAND_16; +# ifdef PNG_READ_EXPAND_SUPPORTED + /* In fact it is an error if it isn't supported, but checking is + * the safe way. + */ + if ((png_ptr->transformations & PNG_EXPAND) != 0) + { + if (png_ptr->bit_depth < 16) + max_pixel_depth *= 2; + } + else +# endif + png_ptr->transformations &= ~PNG_EXPAND_16; } #endif #ifdef PNG_READ_FILLER_SUPPORTED - if (png_ptr->transformations & (PNG_FILLER)) + if ((png_ptr->transformations & (PNG_FILLER)) != 0) { if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) { @@ -4019,14 +4373,15 @@ png_read_start_row(png_structp png_ptr) #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - if (png_ptr->transformations & PNG_GRAY_TO_RGB) + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) != 0) { if ( #ifdef PNG_READ_EXPAND_SUPPORTED - (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) || + (png_ptr->num_trans != 0 && + (png_ptr->transformations & PNG_EXPAND) != 0) || #endif #ifdef PNG_READ_FILLER_SUPPORTED - (png_ptr->transformations & (PNG_FILLER)) || + (png_ptr->transformations & (PNG_FILLER)) != 0 || #endif png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { @@ -4059,7 +4414,7 @@ png_read_start_row(png_structp png_ptr) #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) - if (png_ptr->transformations & PNG_USER_TRANSFORM) + if ((png_ptr->transformations & PNG_USER_TRANSFORM) != 0) { int user_pixel_depth = png_ptr->user_transform_depth * png_ptr->user_transform_channels; @@ -4095,7 +4450,7 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) png_free(png_ptr, png_ptr->big_row_buf); png_free(png_ptr, png_ptr->big_prev_row); - if (png_ptr->interlaced) + if (png_ptr->interlaced != 0) png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr, row_bytes + 48); @@ -4138,7 +4493,7 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1)) png_error(png_ptr, "Row has too many bytes to allocate in memory"); - png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); png_debug1(3, "width = %u,", png_ptr->width); png_debug1(3, "height = %u,", png_ptr->height); @@ -4148,6 +4503,27 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) png_debug1(3, "irowbytes = %lu", (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1); + /* The sequential reader needs a buffer for IDAT, but the progressive reader + * does not, so free the read buffer now regardless; the sequential reader + * reallocates it on demand. + */ + if (png_ptr->read_buffer != 0) + { + png_bytep buffer = png_ptr->read_buffer; + + png_ptr->read_buffer_size = 0; + png_ptr->read_buffer = NULL; + png_free(png_ptr, buffer); + } + + /* Finally claim the zstream for the inflate of the IDAT data, use the bits + * value from the stream (note that this will result in a fatal error if the + * IDAT stream has a bogus deflate header window_bits value, but this should + * not be happening any longer!) + */ + if (png_inflate_claim(png_ptr, png_IDAT) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); + png_ptr->flags |= PNG_FLAG_ROW_INIT; } -#endif /* PNG_READ_SUPPORTED */ +#endif /* READ */ diff --git a/drivers/png/pngset.c b/drivers/png/pngset.c index 61be6bc62e..43456b729d 100644 --- a/drivers/png/pngset.c +++ b/drivers/png/pngset.c @@ -1,8 +1,8 @@ /* pngset.c - storage of image information into info struct * - * Last changed in libpng 1.5.26 [December 17, 2015] - * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.23 [June 9, 2016] + * Copyright (c) 1998-2016 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -20,106 +20,53 @@ #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) -#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) ||\ - defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) -/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, - * and if invalid, correct the keyword rather than discarding the entire - * chunk. The PNG 1.0 specification requires keywords 1-79 characters in - * length, forbids leading or trailing whitespace, multiple internal spaces, - * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. - * - * The 'new_key' buffer must be 80 characters in size (for the keyword plus a - * trailing '\0'). If this routine returns 0 then there was no keyword, or a - * valid one could not be generated, and the caller must handle the error by not - * setting the keyword. - */ -static png_uint_32 -png_check_keyword(png_const_charp key, png_bytep new_key) -{ - png_uint_32 key_len = 0; - int space = 1; - - if (key == NULL) - { - *new_key = 0; - return 0; - } - - while (*key && key_len < 79) - { - png_byte ch = (png_byte)*key++; - - if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/)) - *new_key++ = ch, ++key_len, space = 0; - - else if (space == 0) - { - /* A space or an invalid character when one wasn't seen immediately - * before; output just a space. - */ - *new_key++ = 32, ++key_len, space = 1; - } - } - - if (key_len > 0 && space != 0) /* trailing space */ - --key_len, --new_key; - - /* Terminate the keyword */ - *new_key = 0; - - if (key_len == 0) - return 0; - - return key_len; -} -#endif /* TEXT || pCAL || iCCP || sPLT */ - #ifdef PNG_bKGD_SUPPORTED void PNGAPI -png_set_bKGD(png_structp png_ptr, png_infop info_ptr, +png_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, png_const_color_16p background) { png_debug1(1, "in %s storage function", "bKGD"); - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || background == NULL) return; - png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16)); + info_ptr->background = *background; info_ptr->valid |= PNG_INFO_bKGD; } #endif #ifdef PNG_cHRM_SUPPORTED void PNGFAPI -png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, +png_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, png_fixed_point blue_y) { + png_xy xy; + png_debug1(1, "in %s storage function", "cHRM fixed"); if (png_ptr == NULL || info_ptr == NULL) return; -# ifdef PNG_CHECK_cHRM_SUPPORTED - if (png_check_cHRM_fixed(png_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) -# endif - { - info_ptr->x_white = white_x; - info_ptr->y_white = white_y; - info_ptr->x_red = red_x; - info_ptr->y_red = red_y; - info_ptr->x_green = green_x; - info_ptr->y_green = green_y; - info_ptr->x_blue = blue_x; - info_ptr->y_blue = blue_y; - info_ptr->valid |= PNG_INFO_cHRM; - } + xy.redx = red_x; + xy.redy = red_y; + xy.greenx = green_x; + xy.greeny = green_y; + xy.bluex = blue_x; + xy.bluey = blue_y; + xy.whitex = white_x; + xy.whitey = white_y; + + if (png_colorspace_set_chromaticities(png_ptr, &info_ptr->colorspace, &xy, + 2/* override with app values*/) != 0) + info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; + + png_colorspace_sync_info(png_ptr, info_ptr); } void PNGFAPI -png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr, +png_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, png_fixed_point int_red_Z, png_fixed_point int_green_X, png_fixed_point int_green_Y, png_fixed_point int_green_Z, @@ -127,33 +74,32 @@ png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point int_blue_Z) { png_XYZ XYZ; - png_xy xy; png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); if (png_ptr == NULL || info_ptr == NULL) return; - XYZ.redX = int_red_X; - XYZ.redY = int_red_Y; - XYZ.redZ = int_red_Z; - XYZ.greenX = int_green_X; - XYZ.greenY = int_green_Y; - XYZ.greenZ = int_green_Z; - XYZ.blueX = int_blue_X; - XYZ.blueY = int_blue_Y; - XYZ.blueZ = int_blue_Z; - - if (png_xy_from_XYZ(&xy, XYZ)) - png_error(png_ptr, "XYZ values out of representable range"); - - png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy, - xy.greenx, xy.greeny, xy.bluex, xy.bluey); + XYZ.red_X = int_red_X; + XYZ.red_Y = int_red_Y; + XYZ.red_Z = int_red_Z; + XYZ.green_X = int_green_X; + XYZ.green_Y = int_green_Y; + XYZ.green_Z = int_green_Z; + XYZ.blue_X = int_blue_X; + XYZ.blue_Y = int_blue_Y; + XYZ.blue_Z = int_blue_Z; + + if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace, + &XYZ, 2) != 0) + info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; + + png_colorspace_sync_info(png_ptr, info_ptr); } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_cHRM(png_structp png_ptr, png_infop info_ptr, +png_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, double white_x, double white_y, double red_x, double red_y, double green_x, double green_y, double blue_x, double blue_y) { @@ -169,7 +115,7 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr, } void PNGAPI -png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X, +png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X, double red_Y, double red_Z, double green_X, double green_Y, double green_Z, double blue_X, double blue_Y, double blue_Z) { @@ -184,41 +130,27 @@ png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X, png_fixed(png_ptr, blue_Y, "cHRM Blue Y"), png_fixed(png_ptr, blue_Z, "cHRM Blue Z")); } -# endif /* PNG_FLOATING_POINT_SUPPORTED */ +# endif /* FLOATING_POINT */ -#endif /* PNG_cHRM_SUPPORTED */ +#endif /* cHRM */ #ifdef PNG_gAMA_SUPPORTED void PNGFAPI -png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point - file_gamma) +png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, + png_fixed_point file_gamma) { png_debug1(1, "in %s storage function", "gAMA"); if (png_ptr == NULL || info_ptr == NULL) return; - /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't - * occur. Since the fixed point representation is assymetrical it is - * possible for 1/gamma to overflow the limit of 21474 and this means the - * gamma value must be at least 5/100000 and hence at most 20000.0. For - * safety the limits here are a little narrower. The values are 0.00016 to - * 6250.0, which are truly ridiculous gamma values (and will produce - * displays that are all black or all white.) - */ - if (file_gamma < 16 || file_gamma > 625000000) - png_warning(png_ptr, "Out of range gamma value ignored"); - - else - { - info_ptr->gamma = file_gamma; - info_ptr->valid |= PNG_INFO_gAMA; - } + png_colorspace_set_gamma(png_ptr, &info_ptr->colorspace, file_gamma); + png_colorspace_sync_info(png_ptr, info_ptr); } # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +png_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma) { png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, "png_set_gAMA")); @@ -228,7 +160,8 @@ png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) #ifdef PNG_hIST_SUPPORTED void PNGAPI -png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) +png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr, + png_const_uint_16p hist) { int i; @@ -251,26 +184,27 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in * version 1.2.1 */ - png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); + info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr, + PNG_MAX_PALETTE_LENGTH * (sizeof (png_uint_16)))); - if (png_ptr->hist == NULL) + if (info_ptr->hist == NULL) { png_warning(png_ptr, "Insufficient memory for hIST chunk data"); + return; } + info_ptr->free_me |= PNG_FREE_HIST; + for (i = 0; i < info_ptr->num_palette; i++) - png_ptr->hist[i] = hist[i]; + info_ptr->hist[i] = hist[i]; - info_ptr->hist = png_ptr->hist; info_ptr->valid |= PNG_INFO_hIST; - info_ptr->free_me |= PNG_FREE_HIST; } #endif void PNGAPI -png_set_IHDR(png_structp png_ptr, png_infop info_ptr, +png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type) @@ -295,13 +229,13 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr, if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) info_ptr->channels = 1; - else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) + else if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) info_ptr->channels = 3; else info_ptr->channels = 1; - if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) + if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0) info_ptr->channels++; info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); @@ -311,7 +245,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_oFFs_SUPPORTED void PNGAPI -png_set_oFFs(png_structp png_ptr, png_infop info_ptr, +png_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y, int unit_type) { png_debug1(1, "in %s storage function", "oFFs"); @@ -328,28 +262,20 @@ png_set_oFFs(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_pCAL_SUPPORTED void PNGAPI -png_set_pCAL(png_structp png_ptr, png_infop info_ptr, +png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_const_charp units, png_charpp params) { - png_byte new_purpose[80]; png_size_t length; int i; png_debug1(1, "in %s storage function", "pCAL"); - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL + || (nparams > 0 && params == NULL)) return; - length = png_check_keyword(purpose, new_purpose); - - if (length == 0) - { - png_warning(png_ptr, "pCAL: invalid purpose keyword"); - return; - } - - ++length; + length = strlen(purpose) + 1; png_debug1(3, "allocating purpose for info (%lu bytes)", (unsigned long)length); @@ -359,20 +285,28 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, if (type < 0 || type > 3) png_error(png_ptr, "Invalid pCAL equation type"); + if (nparams < 0 || nparams > 255) + png_error(png_ptr, "Invalid pCAL parameter count"); + /* Validate params[nparams] */ for (i=0; i<nparams; ++i) - if (!png_check_fp_string(params[i], png_strlen(params[i]))) + { + if (params[i] == NULL || + !png_check_fp_string(params[i], strlen(params[i]))) png_error(png_ptr, "Invalid format for pCAL parameter"); + } - info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); + info_ptr->pcal_purpose = png_voidcast(png_charp, + png_malloc_warn(png_ptr, length)); if (info_ptr->pcal_purpose == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL purpose"); + return; } - png_memcpy(info_ptr->pcal_purpose, new_purpose, length); + memcpy(info_ptr->pcal_purpose, purpose, length); png_debug(3, "storing X0, X1, type, and nparams in info"); info_ptr->pcal_X0 = X0; @@ -380,34 +314,37 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, info_ptr->pcal_type = (png_byte)type; info_ptr->pcal_nparams = (png_byte)nparams; - length = png_strlen(units) + 1; + length = strlen(units) + 1; png_debug1(3, "allocating units for info (%lu bytes)", (unsigned long)length); - info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); + info_ptr->pcal_units = png_voidcast(png_charp, + png_malloc_warn(png_ptr, length)); if (info_ptr->pcal_units == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL units"); + return; } - png_memcpy(info_ptr->pcal_units, units, length); + memcpy(info_ptr->pcal_units, units, length); - info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, - (png_size_t)((nparams + 1) * png_sizeof(png_charp))); + info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, + (png_size_t)((nparams + 1) * (sizeof (png_charp))))); if (info_ptr->pcal_params == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL params"); + return; } - png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp)); + memset(info_ptr->pcal_params, 0, (nparams + 1) * (sizeof (png_charp))); for (i = 0; i < nparams; i++) { - length = png_strlen(params[i]) + 1; + length = strlen(params[i]) + 1; png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, (unsigned long)length); @@ -416,10 +353,11 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, if (info_ptr->pcal_params[i] == NULL) { png_warning(png_ptr, "Insufficient memory for pCAL parameter"); + return; } - png_memcpy(info_ptr->pcal_params[i], params[i], length); + memcpy(info_ptr->pcal_params[i], params[i], length); } info_ptr->valid |= PNG_INFO_pCAL; @@ -429,7 +367,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_sCAL_SUPPORTED void PNGAPI -png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, +png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr, int unit, png_const_charp swidth, png_const_charp sheight) { png_size_t lengthw = 0, lengthh = 0; @@ -445,11 +383,11 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, if (unit != 1 && unit != 2) png_error(png_ptr, "Invalid sCAL unit"); - if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 || + if (swidth == NULL || (lengthw = strlen(swidth)) == 0 || swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) png_error(png_ptr, "Invalid sCAL width"); - if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 || + if (sheight == NULL || (lengthh = strlen(sheight)) == 0 || sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) png_error(png_ptr, "Invalid sCAL height"); @@ -459,21 +397,24 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); - info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw); + info_ptr->scal_s_width = png_voidcast(png_charp, + png_malloc_warn(png_ptr, lengthw)); if (info_ptr->scal_s_width == NULL) { png_warning(png_ptr, "Memory allocation failed while processing sCAL"); + return; } - png_memcpy(info_ptr->scal_s_width, swidth, lengthw); + memcpy(info_ptr->scal_s_width, swidth, lengthw); ++lengthh; png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); - info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh); + info_ptr->scal_s_height = png_voidcast(png_charp, + png_malloc_warn(png_ptr, lengthh)); if (info_ptr->scal_s_height == NULL) { @@ -481,10 +422,11 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, info_ptr->scal_s_width = NULL; png_warning(png_ptr, "Memory allocation failed while processing sCAL"); + return; } - png_memcpy(info_ptr->scal_s_height, sheight, lengthh); + memcpy(info_ptr->scal_s_height, sheight, lengthh); info_ptr->valid |= PNG_INFO_sCAL; info_ptr->free_me |= PNG_FREE_SCAL; @@ -492,8 +434,8 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, # ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, - double height) +png_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit, + double width, double height) { png_debug1(1, "in %s storage function", "sCAL"); @@ -510,9 +452,9 @@ png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, char swidth[PNG_sCAL_MAX_DIGITS+1]; char sheight[PNG_sCAL_MAX_DIGITS+1]; - png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width, + png_ascii_from_fp(png_ptr, swidth, (sizeof swidth), width, PNG_sCAL_PRECISION); - png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height, + png_ascii_from_fp(png_ptr, sheight, (sizeof sheight), height, PNG_sCAL_PRECISION); png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); @@ -522,7 +464,7 @@ png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, # ifdef PNG_FIXED_POINT_SUPPORTED void PNGAPI -png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, +png_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit, png_fixed_point width, png_fixed_point height) { png_debug1(1, "in %s storage function", "sCAL"); @@ -540,8 +482,8 @@ png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, char swidth[PNG_sCAL_MAX_DIGITS+1]; char sheight[PNG_sCAL_MAX_DIGITS+1]; - png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width); - png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height); + png_ascii_from_fixed(png_ptr, swidth, (sizeof swidth), width); + png_ascii_from_fixed(png_ptr, sheight, (sizeof sheight), height); png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); } @@ -551,7 +493,7 @@ png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, #ifdef PNG_pHYs_SUPPORTED void PNGAPI -png_set_pHYs(png_structp png_ptr, png_infop info_ptr, +png_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type) { png_debug1(1, "in %s storage function", "pHYs"); @@ -567,7 +509,7 @@ png_set_pHYs(png_structp png_ptr, png_infop info_ptr, #endif void PNGAPI -png_set_PLTE(png_structp png_ptr, png_infop info_ptr, +png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr, png_const_colorp palette, int num_palette) { @@ -589,13 +531,27 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, else { png_warning(png_ptr, "Invalid palette length"); + return; } } + if ((num_palette > 0 && palette == NULL) || + (num_palette == 0 +# ifdef PNG_MNG_FEATURES_SUPPORTED + && (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 +# endif + )) + { + png_error(png_ptr, "Invalid palette"); + } + /* It may not actually be necessary to set png_ptr->palette here; * we do it for backward compatibility with the way the png_handle_tRNS * function used to do the allocation. + * + * 1.6.0: the above statement appears to be incorrect; something has to set + * the palette inside png_struct on read. */ png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); @@ -603,10 +559,11 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, * of num_palette entries, in case of an invalid PNG file or incorrect * call to png_set_PLTE() with too-large sample values. */ - png_ptr->palette = (png_colorp)png_calloc(png_ptr, - PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); + png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr, + PNG_MAX_PALETTE_LENGTH * (sizeof (png_color)))); - png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); + if (num_palette > 0) + memcpy(png_ptr->palette, palette, num_palette * (sizeof (png_color))); info_ptr->palette = png_ptr->palette; info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; @@ -617,34 +574,34 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_sBIT_SUPPORTED void PNGAPI -png_set_sBIT(png_structp png_ptr, png_infop info_ptr, +png_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, png_const_color_8p sig_bit) { png_debug1(1, "in %s storage function", "sBIT"); - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL) return; - png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); + info_ptr->sig_bit = *sig_bit; info_ptr->valid |= PNG_INFO_sBIT; } #endif #ifdef PNG_sRGB_SUPPORTED void PNGAPI -png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent) +png_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) { png_debug1(1, "in %s storage function", "sRGB"); if (png_ptr == NULL || info_ptr == NULL) return; - info_ptr->srgb_intent = (png_byte)srgb_intent; - info_ptr->valid |= PNG_INFO_sRGB; + (void)png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent); + png_colorspace_sync_info(png_ptr, info_ptr); } void PNGAPI -png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, +png_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) { png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); @@ -652,32 +609,25 @@ png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, if (png_ptr == NULL || info_ptr == NULL) return; - png_set_sRGB(png_ptr, info_ptr, srgb_intent); - -# ifdef PNG_gAMA_SUPPORTED - png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); -# endif + if (png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, + srgb_intent) != 0) + { + /* This causes the gAMA and cHRM to be written too */ + info_ptr->colorspace.flags |= + PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; + } -# ifdef PNG_cHRM_SUPPORTED - png_set_cHRM_fixed(png_ptr, info_ptr, - /* color x y */ - /* white */ 31270, 32900, - /* red */ 64000, 33000, - /* green */ 30000, 60000, - /* blue */ 15000, 6000 - ); -# endif /* cHRM */ + png_colorspace_sync_info(png_ptr, info_ptr); } #endif /* sRGB */ #ifdef PNG_iCCP_SUPPORTED void PNGAPI -png_set_iCCP(png_structp png_ptr, png_infop info_ptr, +png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, png_const_charp name, int compression_type, png_const_bytep profile, png_uint_32 proflen) { - png_byte new_name[80]; png_charp new_iccp_name; png_bytep new_iccp_profile; png_size_t length; @@ -687,45 +637,60 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) return; - length = png_check_keyword(name, new_name); + if (compression_type != PNG_COMPRESSION_TYPE_BASE) + png_app_error(png_ptr, "Invalid iCCP compression method"); - if (length == 0) + /* Set the colorspace first because this validates the profile; do not + * override previously set app cHRM or gAMA here (because likely as not the + * application knows better than libpng what the correct values are.) Pass + * the info_ptr color_type field to png_colorspace_set_ICC because in the + * write case it has not yet been stored in png_ptr. + */ { - png_warning(png_ptr, "iCCP: invalid keyword"); - return; + int result = png_colorspace_set_ICC(png_ptr, &info_ptr->colorspace, name, + proflen, profile, info_ptr->color_type); + + png_colorspace_sync_info(png_ptr, info_ptr); + + /* Don't do any of the copying if the profile was bad, or inconsistent. */ + if (result == 0) + return; + + /* But do write the gAMA and cHRM chunks from the profile. */ + info_ptr->colorspace.flags |= + PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; } - - ++length; - new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); + + length = strlen(name)+1; + new_iccp_name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length)); if (new_iccp_name == NULL) { - png_warning(png_ptr, "Insufficient memory to process iCCP chunk"); + png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk"); + return; } - png_memcpy(new_iccp_name, new_name, length); - new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); + memcpy(new_iccp_name, name, length); + new_iccp_profile = png_voidcast(png_bytep, + png_malloc_warn(png_ptr, proflen)); if (new_iccp_profile == NULL) { - png_free (png_ptr, new_iccp_name); - png_warning(png_ptr, + png_free(png_ptr, new_iccp_name); + png_benign_error(png_ptr, "Insufficient memory to process iCCP profile"); + return; } - png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); + memcpy(new_iccp_profile, profile, proflen); png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); info_ptr->iccp_proflen = proflen; info_ptr->iccp_name = new_iccp_name; info_ptr->iccp_profile = new_iccp_profile; - /* Compression is always zero but is here so the API and info structure - * does not have to change if we introduce multiple compression types - */ - info_ptr->iccp_compression = (png_byte)compression_type; info_ptr->free_me |= PNG_FREE_ICCP; info_ptr->valid |= PNG_INFO_iCCP; } @@ -733,8 +698,8 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_TEXT_SUPPORTED void PNGAPI -png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, - int num_text) +png_set_text(png_const_structrp png_ptr, png_inforp info_ptr, + png_const_textp text_ptr, int num_text) { int ret; ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); @@ -744,85 +709,71 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, } int /* PRIVATE */ -png_set_text_2(png_structp png_ptr, png_infop info_ptr, +png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr, png_const_textp text_ptr, int num_text) { int i; - size_t element_size; - png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11 : + png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11U : (unsigned long)png_ptr->chunk_name); - if (png_ptr == NULL || info_ptr == NULL || num_text == 0) + if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL) return(0); /* Make sure we have enough space in the "text" array in info_struct - * to hold all of the incoming text_ptr objects. + * to hold all of the incoming text_ptr objects. This compare can't overflow + * because max_text >= num_text (anyway, subtract of two positive integers + * can't overflow in any case.) */ - - element_size=png_sizeof(png_text); - if (num_text < 0 || - num_text > INT_MAX - info_ptr->num_text - 8 || - (unsigned int)/*SAFE*/(num_text +/*SAFE*/ - info_ptr->num_text + 8) >= - PNG_SIZE_MAX/element_size) - { - png_warning(png_ptr, "too many text chunks"); - return(0); - } - - if (info_ptr->num_text + num_text > info_ptr->max_text) + if (num_text > info_ptr->max_text - info_ptr->num_text) { - int old_max_text = info_ptr->max_text; int old_num_text = info_ptr->num_text; + int max_text; + png_textp new_text = NULL; - if (info_ptr->text != NULL) + /* Calculate an appropriate max_text, checking for overflow. */ + max_text = old_num_text; + if (num_text <= INT_MAX - max_text) { - png_textp old_text; - - info_ptr->max_text = info_ptr->num_text + num_text + 8; - old_text = info_ptr->text; + max_text += num_text; - info_ptr->text = (png_textp)png_malloc_warn(png_ptr, - (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); + /* Round up to a multiple of 8 */ + if (max_text < INT_MAX-8) + max_text = (max_text + 8) & ~0x7; - if (info_ptr->text == NULL) - { - /* Restore to previous condition */ - info_ptr->max_text = old_max_text; - info_ptr->text = old_text; - return(1); - } + else + max_text = INT_MAX; - png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text * - png_sizeof(png_text))); - png_free(png_ptr, old_text); + /* Now allocate a new array and copy the old members in; this does all + * the overflow checks. + */ + new_text = png_voidcast(png_textp,png_realloc_array(png_ptr, + info_ptr->text, old_num_text, max_text-old_num_text, + sizeof *new_text)); } - else + if (new_text == NULL) { - info_ptr->max_text = num_text + 8; - info_ptr->num_text = 0; - info_ptr->text = (png_textp)png_malloc_warn(png_ptr, - (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); - if (info_ptr->text == NULL) - { - /* Restore to previous condition */ - info_ptr->num_text = old_num_text; - info_ptr->max_text = old_max_text; - return(1); - } - info_ptr->free_me |= PNG_FREE_TEXT; + png_chunk_report(png_ptr, "too many text chunks", + PNG_CHUNK_WRITE_ERROR); + + return 1; } - png_debug1(3, "allocated %d entries for info_ptr->text", - info_ptr->max_text); + png_free(png_ptr, info_ptr->text); + + info_ptr->text = new_text; + info_ptr->free_me |= PNG_FREE_TEXT; + info_ptr->max_text = max_text; + /* num_text is adjusted below as the entries are copied in */ + + png_debug1(3, "allocated %d entries for info_ptr->text", max_text); } + for (i = 0; i < num_text; i++) { - png_byte new_key[80], new_lang[80]; - png_size_t text_length, key_len; - png_size_t lang_len, lang_key_len; + size_t text_length, key_len; + size_t lang_len, lang_key_len; png_textp textp = &(info_ptr->text[info_ptr->num_text]); if (text_ptr[i].key == NULL) @@ -831,17 +782,12 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) { - png_warning(png_ptr, "text compression mode is out of range"); + png_chunk_report(png_ptr, "text compression mode is out of range", + PNG_CHUNK_WRITE_ERROR); continue; } - key_len = png_check_keyword(text_ptr[i].key, new_key); - - if (key_len == 0) - { - png_warning(png_ptr, "invalid text keyword"); - continue; - } + key_len = strlen(text_ptr[i].key); if (text_ptr[i].compression <= 0) { @@ -854,22 +800,22 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, { /* Set iTXt data */ - /* Zero length language is OK */ if (text_ptr[i].lang != NULL) - lang_len = png_check_keyword(text_ptr[i].lang, new_lang); + lang_len = strlen(text_ptr[i].lang); else lang_len = 0; if (text_ptr[i].lang_key != NULL) - lang_key_len = png_strlen(text_ptr[i].lang_key); + lang_key_len = strlen(text_ptr[i].lang_key); else lang_key_len = 0; } -# else /* PNG_iTXt_SUPPORTED */ +# else /* iTXt */ { - png_warning(png_ptr, "iTXt chunk not supported"); + png_chunk_report(png_ptr, "iTXt chunk not supported", + PNG_CHUNK_WRITE_ERROR); continue; } # endif @@ -888,32 +834,36 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, else { - text_length = png_strlen(text_ptr[i].text); + text_length = strlen(text_ptr[i].text); textp->compression = text_ptr[i].compression; } - textp->key = (png_charp)png_malloc_warn(png_ptr, - (png_size_t) - (key_len + text_length + lang_len + lang_key_len + 4)); + textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr, + key_len + text_length + lang_len + lang_key_len + 4)); if (textp->key == NULL) - return(1); + { + png_chunk_report(png_ptr, "text chunk: out of memory", + PNG_CHUNK_WRITE_ERROR); + + return 1; + } png_debug2(2, "Allocated %lu bytes at %p in png_set_text", (unsigned long)(png_uint_32) (key_len + lang_len + lang_key_len + text_length + 4), textp->key); - png_memcpy(textp->key, new_key, (png_size_t)(key_len)); + memcpy(textp->key, text_ptr[i].key, key_len); *(textp->key + key_len) = '\0'; if (text_ptr[i].compression > 0) { textp->lang = textp->key + key_len + 1; - png_memcpy(textp->lang, text_ptr[i].lang, lang_len); + memcpy(textp->lang, text_ptr[i].lang, lang_len); *(textp->lang + lang_len) = '\0'; textp->lang_key = textp->lang + lang_len + 1; - png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); + memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); *(textp->lang_key + lang_key_len) = '\0'; textp->text = textp->lang_key + lang_key_len + 1; } @@ -926,8 +876,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, } if (text_length != 0) - png_memcpy(textp->text, text_ptr[i].text, - (png_size_t)(text_length)); + memcpy(textp->text, text_ptr[i].text, text_length); *(textp->text + text_length) = '\0'; @@ -948,18 +897,20 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, info_ptr->num_text++; png_debug1(3, "transferred text chunk %d", info_ptr->num_text); } + return(0); } #endif #ifdef PNG_tIME_SUPPORTED void PNGAPI -png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) +png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr, + png_const_timep mod_time) { png_debug1(1, "in %s storage function", "tIME"); - if (png_ptr == NULL || info_ptr == NULL || - (png_ptr->mode & PNG_WROTE_tIME)) + if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL || + (png_ptr->mode & PNG_WROTE_tIME) != 0) return; if (mod_time->month == 0 || mod_time->month > 12 || @@ -968,52 +919,55 @@ png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) mod_time->second > 60) { png_warning(png_ptr, "Ignoring invalid time value"); + return; } - png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); + info_ptr->mod_time = *mod_time; info_ptr->valid |= PNG_INFO_tIME; } #endif #ifdef PNG_tRNS_SUPPORTED void PNGAPI -png_set_tRNS(png_structp png_ptr, png_infop info_ptr, +png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) { png_debug1(1, "in %s storage function", "tRNS"); if (png_ptr == NULL || info_ptr == NULL) - return; - if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH) - { - png_warning(png_ptr, "Ignoring invalid num_trans value"); - return; - } + return; if (trans_alpha != NULL) { /* It may not actually be necessary to set png_ptr->trans_alpha here; * we do it for backward compatibility with the way the png_handle_tRNS * function used to do the allocation. + * + * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively + * relies on png_set_tRNS storing the information in png_struct + * (otherwise it won't be there for the code in pngrtran.c). */ png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); - /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ - png_ptr->trans_alpha = info_ptr->trans_alpha = - (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH); - if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) - png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); + { + /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ + info_ptr->trans_alpha = png_voidcast(png_bytep, + png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH)); + memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); + } + png_ptr->trans_alpha = info_ptr->trans_alpha; } if (trans_color != NULL) { +#ifdef PNG_WARNINGS_SUPPORTED if (info_ptr->bit_depth < 16) { - unsigned int sample_max = (1U << info_ptr->bit_depth) - 1U; + int sample_max = (1 << info_ptr->bit_depth) - 1; if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && trans_color->gray > sample_max) || @@ -1021,12 +975,12 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr, (trans_color->red > sample_max || trans_color->green > sample_max || trans_color->blue > sample_max))) - png_warning(png_ptr, - "tRNS chunk has out-of-range samples for bit_depth"); + png_warning(png_ptr, + "tRNS chunk has out-of-range samples for bit_depth"); } +#endif - png_memcpy(&(info_ptr->trans_color), trans_color, - png_sizeof(png_color_16)); + info_ptr->trans_color = *trans_color; if (num_trans == 0) num_trans = 1; @@ -1044,8 +998,8 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr, #ifdef PNG_sPLT_SUPPORTED void PNGAPI -png_set_sPLT(png_structp png_ptr, - png_infop info_ptr, png_const_sPLT_tp entries, int nentries) +png_set_sPLT(png_const_structrp png_ptr, + png_inforp info_ptr, png_const_sPLT_tp entries, int nentries) /* * entries - array of png_sPLT_t structures * to be added to the list of palettes @@ -1056,251 +1010,462 @@ png_set_sPLT(png_structp png_ptr, */ { png_sPLT_tp np; - int i, j; - size_t element_size; - if (png_ptr == NULL || info_ptr == NULL) + if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL) return; - element_size = png_sizeof(png_sPLT_t); - if (nentries < 0 || - nentries > INT_MAX-info_ptr->splt_palettes_num || - (unsigned int)/*SAFE*/(nentries +/*SAFE*/ - info_ptr->splt_palettes_num) >= - PNG_SIZE_MAX/element_size) - np=NULL; - - else - - np = (png_sPLT_tp)png_malloc_warn(png_ptr, - (info_ptr->splt_palettes_num + nentries) * - (png_size_t)png_sizeof(png_sPLT_t)); + /* Use the internal realloc function, which checks for all the possible + * overflows. Notice that the parameters are (int) and (size_t) + */ + np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr, + info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries, + sizeof *np)); if (np == NULL) { - png_warning(png_ptr, "No memory for sPLT palettes"); + /* Out of memory or too many chunks */ + png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR); + return; } - png_memcpy(np, info_ptr->splt_palettes, - info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); - png_free(png_ptr, info_ptr->splt_palettes); - info_ptr->splt_palettes=NULL; + info_ptr->splt_palettes = np; + info_ptr->free_me |= PNG_FREE_SPLT; + + np += info_ptr->splt_palettes_num; - for (i = j = 0; i < nentries; i++) + do { - png_sPLT_tp to = np + info_ptr->splt_palettes_num + j; - png_const_sPLT_tp from = entries + i; - png_byte new_name[80]; png_size_t length; - length = png_check_keyword(from->name, new_name); - - if (length == 0) + /* Skip invalid input entries */ + if (entries->name == NULL || entries->entries == NULL) { - png_warning(png_ptr, "sPLT: invalid keyword"); + /* png_handle_sPLT doesn't do this, so this is an app error */ + png_app_error(png_ptr, "png_set_sPLT: invalid sPLT"); + /* Just skip the invalid entry */ continue; } - ++length; /* for trailing '\0' */ - to->name = (png_charp)png_malloc_warn(png_ptr, length); + np->depth = entries->depth; - if (to->name == NULL) - { - png_warning(png_ptr, - "Out of memory while processing sPLT chunk"); - continue; - } + /* In the event of out-of-memory just return - there's no point keeping + * on trying to add sPLT chunks. + */ + length = strlen(entries->name) + 1; + np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length)); - png_memcpy(to->name, new_name, length); - to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, - from->nentries * png_sizeof(png_sPLT_entry)); + if (np->name == NULL) + break; - if (to->entries == NULL) + memcpy(np->name, entries->name, length); + + /* IMPORTANT: we have memory now that won't get freed if something else + * goes wrong; this code must free it. png_malloc_array produces no + * warnings; use a png_chunk_report (below) if there is an error. + */ + np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr, + entries->nentries, sizeof (png_sPLT_entry))); + + if (np->entries == NULL) { - png_warning(png_ptr, - "Out of memory while processing sPLT chunk"); - png_free(png_ptr, to->name); - to->name = NULL; - continue; + png_free(png_ptr, np->name); + np->name = NULL; + break; } - png_memcpy(to->entries, from->entries, - from->nentries * png_sizeof(png_sPLT_entry)); + np->nentries = entries->nentries; + /* This multiply can't overflow because png_malloc_array has already + * checked it when doing the allocation. + */ + memcpy(np->entries, entries->entries, + entries->nentries * sizeof (png_sPLT_entry)); + + /* Note that 'continue' skips the advance of the out pointer and out + * count, so an invalid entry is not added. + */ + info_ptr->valid |= PNG_INFO_sPLT; + ++(info_ptr->splt_palettes_num); + ++np; + } + while (++entries, --nentries); + + if (nentries > 0) + png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR); +} +#endif /* sPLT */ + +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED +static png_byte +check_location(png_const_structrp png_ptr, int location) +{ + location &= (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT); - to->nentries = from->nentries; - to->depth = from->depth; - ++j; + /* New in 1.6.0; copy the location and check it. This is an API + * change; previously the app had to use the + * png_set_unknown_chunk_location API below for each chunk. + */ + if (location == 0 && (png_ptr->mode & PNG_IS_READ_STRUCT) == 0) + { + /* Write struct, so unknown chunks come from the app */ + png_app_warning(png_ptr, + "png_set_unknown_chunks now expects a valid location"); + /* Use the old behavior */ + location = (png_byte)(png_ptr->mode & + (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)); } - info_ptr->splt_palettes = np; - info_ptr->splt_palettes_num = j; - info_ptr->valid |= PNG_INFO_sPLT; - info_ptr->free_me |= PNG_FREE_SPLT; + /* This need not be an internal error - if the app calls + * png_set_unknown_chunks on a read pointer it must get the location right. + */ + if (location == 0) + png_error(png_ptr, "invalid location in png_set_unknown_chunks"); + + /* Now reduce the location to the top-most set bit by removing each least + * significant bit in turn. + */ + while (location != (location & -location)) + location &= ~(location & -location); + + /* The cast is safe because 'location' is a bit mask and only the low four + * bits are significant. + */ + return (png_byte)location; } -#endif /* PNG_sPLT_SUPPORTED */ -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED void PNGAPI -png_set_unknown_chunks(png_structp png_ptr, - png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) +png_set_unknown_chunks(png_const_structrp png_ptr, + png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) { png_unknown_chunkp np; - int i; - size_t element_size; - if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) + if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 || + unknowns == NULL) return; - element_size = png_sizeof(png_unknown_chunk); - if (num_unknowns < 0 || - num_unknowns > INT_MAX-info_ptr->unknown_chunks_num || - (unsigned int)/*SAFE*/(num_unknowns +/*SAFE*/ - info_ptr->unknown_chunks_num) >= - PNG_SIZE_MAX/element_size) - np=NULL; + /* Check for the failure cases where support has been disabled at compile + * time. This code is hardly ever compiled - it's here because + * STORE_UNKNOWN_CHUNKS is set by both read and write code (compiling in this + * code) but may be meaningless if the read or write handling of unknown + * chunks is not compiled in. + */ +# if !defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \ + defined(PNG_READ_SUPPORTED) + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) + { + png_app_error(png_ptr, "no unknown chunk support on read"); + + return; + } +# endif +# if !defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \ + defined(PNG_WRITE_SUPPORTED) + if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) + { + png_app_error(png_ptr, "no unknown chunk support on write"); - else - np = (png_unknown_chunkp)png_malloc_warn(png_ptr, - (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * - png_sizeof(png_unknown_chunk)); + return; + } +# endif + + /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that + * unknown critical chunks could be lost with just a warning resulting in + * undefined behavior. Now png_chunk_report is used to provide behavior + * appropriate to read or write. + */ + np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr, + info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns, + sizeof *np)); if (np == NULL) { - png_warning(png_ptr, - "Out of memory while processing unknown chunk"); + png_chunk_report(png_ptr, "too many unknown chunks", + PNG_CHUNK_WRITE_ERROR); + return; } - png_memcpy(np, info_ptr->unknown_chunks, - (png_size_t)info_ptr->unknown_chunks_num * - png_sizeof(png_unknown_chunk)); - png_free(png_ptr, info_ptr->unknown_chunks); - info_ptr->unknown_chunks = NULL; - - for (i = 0; i < num_unknowns; i++) - { - png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; - png_const_unknown_chunkp from = unknowns + i; + info_ptr->unknown_chunks = np; /* safe because it is initialized */ + info_ptr->free_me |= PNG_FREE_UNKN; - png_memcpy(to->name, from->name, png_sizeof(from->name)); - to->name[png_sizeof(to->name)-1] = '\0'; - to->size = from->size; + np += info_ptr->unknown_chunks_num; - /* Note our location in the read or write sequence */ - to->location = (png_byte)(png_ptr->mode & 0xff); + /* Increment unknown_chunks_num each time round the loop to protect the + * just-allocated chunk data. + */ + for (; num_unknowns > 0; --num_unknowns, ++unknowns) + { + memcpy(np->name, unknowns->name, (sizeof np->name)); + np->name[(sizeof np->name)-1] = '\0'; + np->location = check_location(png_ptr, unknowns->location); - if (from->size == 0) - to->data=NULL; + if (unknowns->size == 0) + { + np->data = NULL; + np->size = 0; + } else { - to->data = (png_bytep)png_malloc_warn(png_ptr, - (png_size_t)from->size); + np->data = png_voidcast(png_bytep, + png_malloc_base(png_ptr, unknowns->size)); - if (to->data == NULL) + if (np->data == NULL) { - png_warning(png_ptr, - "Out of memory while processing unknown chunk"); - to->size = 0; + png_chunk_report(png_ptr, "unknown chunk: out of memory", + PNG_CHUNK_WRITE_ERROR); + /* But just skip storing the unknown chunk */ + continue; } - else - png_memcpy(to->data, from->data, from->size); + memcpy(np->data, unknowns->data, unknowns->size); + np->size = unknowns->size; } - } - info_ptr->unknown_chunks = np; - info_ptr->unknown_chunks_num += num_unknowns; - info_ptr->free_me |= PNG_FREE_UNKN; + /* These increments are skipped on out-of-memory for the data - the + * unknown chunk entry gets overwritten if the png_chunk_report returns. + * This is correct in the read case (the chunk is just dropped.) + */ + ++np; + ++(info_ptr->unknown_chunks_num); + } } void PNGAPI -png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, +png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location) { - if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < - info_ptr->unknown_chunks_num) - info_ptr->unknown_chunks[chunk].location = (png_byte)location; -} -#endif + /* This API is pretty pointless in 1.6.0 because the location can be set + * before the call to png_set_unknown_chunks. + * + * TODO: add a png_app_warning in 1.7 + */ + if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && + chunk < info_ptr->unknown_chunks_num) + { + if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0) + { + png_app_error(png_ptr, "invalid unknown chunk location"); + /* Fake out the pre 1.6.0 behavior: */ + if ((location & PNG_HAVE_IDAT) != 0) /* undocumented! */ + location = PNG_AFTER_IDAT; + + else + location = PNG_HAVE_IHDR; /* also undocumented */ + } + info_ptr->unknown_chunks[chunk].location = + check_location(png_ptr, location); + } +} +#endif /* STORE_UNKNOWN_CHUNKS */ #ifdef PNG_MNG_FEATURES_SUPPORTED png_uint_32 PNGAPI -png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) +png_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features) { png_debug(1, "in png_permit_mng_features"); if (png_ptr == NULL) - return (png_uint_32)0; + return 0; - png_ptr->mng_features_permitted = - (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES; - return (png_uint_32)png_ptr->mng_features_permitted; + return png_ptr->mng_features_permitted; } #endif #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +static unsigned int +add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep) +{ + unsigned int i; + + /* Utility function: update the 'keep' state of a chunk if it is already in + * the list, otherwise add it to the list. + */ + for (i=0; i<count; ++i, list += 5) + { + if (memcmp(list, add, 4) == 0) + { + list[4] = (png_byte)keep; + + return count; + } + } + + if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) + { + ++count; + memcpy(list, add, 4); + list[4] = (png_byte)keep; + } + + return count; +} + void PNGAPI -png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep - chunk_list, int num_chunks) +png_set_keep_unknown_chunks(png_structrp png_ptr, int keep, + png_const_bytep chunk_list, int num_chunks_in) { - png_bytep new_list, p; - int i, old_num_chunks; + png_bytep new_list; + unsigned int num_chunks, old_num_chunks; + if (png_ptr == NULL) return; - if (num_chunks == 0) + if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST) { - if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) - png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep"); - else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + return; + } - if (keep == PNG_HANDLE_CHUNK_ALWAYS) - png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; + if (num_chunks_in <= 0) + { + png_ptr->unknown_default = keep; - else - png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; + /* '0' means just set the flags, so stop here */ + if (num_chunks_in == 0) + return; + } - return; + if (num_chunks_in < 0) + { + /* Ignore all unknown chunks and all chunks recognized by + * libpng except for IHDR, PLTE, tRNS, IDAT, and IEND + */ + static PNG_CONST png_byte chunks_to_ignore[] = { + 98, 75, 71, 68, '\0', /* bKGD */ + 99, 72, 82, 77, '\0', /* cHRM */ + 103, 65, 77, 65, '\0', /* gAMA */ + 104, 73, 83, 84, '\0', /* hIST */ + 105, 67, 67, 80, '\0', /* iCCP */ + 105, 84, 88, 116, '\0', /* iTXt */ + 111, 70, 70, 115, '\0', /* oFFs */ + 112, 67, 65, 76, '\0', /* pCAL */ + 112, 72, 89, 115, '\0', /* pHYs */ + 115, 66, 73, 84, '\0', /* sBIT */ + 115, 67, 65, 76, '\0', /* sCAL */ + 115, 80, 76, 84, '\0', /* sPLT */ + 115, 84, 69, 82, '\0', /* sTER */ + 115, 82, 71, 66, '\0', /* sRGB */ + 116, 69, 88, 116, '\0', /* tEXt */ + 116, 73, 77, 69, '\0', /* tIME */ + 122, 84, 88, 116, '\0' /* zTXt */ + }; + + chunk_list = chunks_to_ignore; + num_chunks = (unsigned int)/*SAFE*/(sizeof chunks_to_ignore)/5U; } - if (chunk_list == NULL) - return; + else /* num_chunks_in > 0 */ + { + if (chunk_list == NULL) + { + /* Prior to 1.6.0 this was silently ignored, now it is an app_error + * which can be switched off. + */ + png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list"); + + return; + } + + num_chunks = num_chunks_in; + } old_num_chunks = png_ptr->num_chunk_list; - new_list=(png_bytep)png_malloc(png_ptr, - (png_size_t)(5*(num_chunks + old_num_chunks))); + if (png_ptr->chunk_list == NULL) + old_num_chunks = 0; - if (png_ptr->chunk_list != NULL) + /* Since num_chunks is always restricted to UINT_MAX/5 this can't overflow. + */ + if (num_chunks + old_num_chunks > UINT_MAX/5) { - png_memcpy(new_list, png_ptr->chunk_list, - (png_size_t)(5*old_num_chunks)); - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->chunk_list=NULL; + png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks"); + + return; } - png_memcpy(new_list + 5*old_num_chunks, chunk_list, - (png_size_t)(5*num_chunks)); + /* If these chunks are being reset to the default then no more memory is + * required because add_one_chunk above doesn't extend the list if the 'keep' + * parameter is the default. + */ + if (keep != 0) + { + new_list = png_voidcast(png_bytep, png_malloc(png_ptr, + 5 * (num_chunks + old_num_chunks))); + + if (old_num_chunks > 0) + memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); + } - for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5) - *p=(png_byte)keep; + else if (old_num_chunks > 0) + new_list = png_ptr->chunk_list; + + else + new_list = NULL; - png_ptr->num_chunk_list = old_num_chunks + num_chunks; - png_ptr->chunk_list = new_list; - png_ptr->free_me |= PNG_FREE_LIST; + /* Add the new chunks together with each one's handling code. If the chunk + * already exists the code is updated, otherwise the chunk is added to the + * end. (In libpng 1.6.0 order no longer matters because this code enforces + * the earlier convention that the last setting is the one that is used.) + */ + if (new_list != NULL) + { + png_const_bytep inlist; + png_bytep outlist; + unsigned int i; + + for (i=0; i<num_chunks; ++i) + { + old_num_chunks = add_one_chunk(new_list, old_num_chunks, + chunk_list+5*i, keep); + } + + /* Now remove any spurious 'default' entries. */ + num_chunks = 0; + for (i=0, inlist=outlist=new_list; i<old_num_chunks; ++i, inlist += 5) + { + if (inlist[4]) + { + if (outlist != inlist) + memcpy(outlist, inlist, 5); + outlist += 5; + ++num_chunks; + } + } + + /* This means the application has removed all the specialized handling. */ + if (num_chunks == 0) + { + if (png_ptr->chunk_list != new_list) + png_free(png_ptr, new_list); + + new_list = NULL; + } + } + + else + num_chunks = 0; + + png_ptr->num_chunk_list = num_chunks; + + if (png_ptr->chunk_list != new_list) + { + if (png_ptr->chunk_list != NULL) + png_free(png_ptr, png_ptr->chunk_list); + + png_ptr->chunk_list = new_list; + } } #endif #ifdef PNG_READ_USER_CHUNKS_SUPPORTED void PNGAPI -png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, +png_set_read_user_chunk_fn(png_structrp png_ptr, png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn) { png_debug(1, "in png_set_read_user_chunk_fn"); @@ -1315,14 +1480,16 @@ png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, #ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI -png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) +png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr, + png_bytepp row_pointers) { png_debug1(1, "in %s storage function", "rows"); if (png_ptr == NULL || info_ptr == NULL) return; - if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) + if (info_ptr->row_pointers != NULL && + (info_ptr->row_pointers != row_pointers)) png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); info_ptr->row_pointers = row_pointers; @@ -1332,54 +1499,83 @@ png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) } #endif -#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED void PNGAPI -png_set_compression_buffer_size(png_structp png_ptr, png_size_t size) +png_set_compression_buffer_size(png_structrp png_ptr, png_size_t size) { if (png_ptr == NULL) return; - png_free(png_ptr, png_ptr->zbuf); + if (size == 0 || size > PNG_UINT_31_MAX) + png_error(png_ptr, "invalid compression buffer size"); - if (size > ZLIB_IO_MAX) - { - png_warning(png_ptr, "Attempt to set buffer size beyond max ignored"); - png_ptr->zbuf_size = ZLIB_IO_MAX; - size = ZLIB_IO_MAX; /* must fit */ - } +# ifdef PNG_SEQUENTIAL_READ_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) + { + png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */ + return; + } +# endif - else - png_ptr->zbuf_size = (uInt)size; +# ifdef PNG_WRITE_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) + { + if (png_ptr->zowner != 0) + { + png_warning(png_ptr, + "Compression buffer size cannot be changed because it is in use"); - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); + return; + } - /* The following ensures a relatively safe failure if this gets called while - * the buffer is actually in use. - */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = 0; - png_ptr->zstream.avail_in = 0; +#ifndef __COVERITY__ + /* Some compilers complain that this is always false. However, it + * can be true when integer overflow happens. + */ + if (size > ZLIB_IO_MAX) + { + png_warning(png_ptr, + "Compression buffer size limited to system maximum"); + size = ZLIB_IO_MAX; /* must fit */ + } +#endif + + if (size < 6) + { + /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH + * if this is permitted. + */ + png_warning(png_ptr, + "Compression buffer size cannot be reduced below 6"); + + return; + } + + if (png_ptr->zbuffer_size != size) + { + png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); + png_ptr->zbuffer_size = (uInt)size; + } + } +# endif } -#endif /* WRITE_CUSTOMIZE_COMPRESSION */ void PNGAPI -png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) +png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask) { - if (png_ptr && info_ptr) + if (png_ptr != NULL && info_ptr != NULL) info_ptr->valid &= ~mask; } - #ifdef PNG_SET_USER_LIMITS_SUPPORTED /* This function was added to libpng 1.2.6 */ void PNGAPI -png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, +png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max) { /* Images with dimensions larger than these limits will be * rejected by png_set_IHDR(). To accept any PNG datastream - * regardless of dimensions, set both limits to 0x7fffffffL. + * regardless of dimensions, set both limits to 0x7fffffff. */ if (png_ptr == NULL) return; @@ -1390,52 +1586,148 @@ png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, /* This function was added to libpng 1.4.0 */ void PNGAPI -png_set_chunk_cache_max (png_structp png_ptr, - png_uint_32 user_chunk_cache_max) +png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max) { - if (png_ptr != NULL) - png_ptr->user_chunk_cache_max = user_chunk_cache_max; + if (png_ptr != NULL) + png_ptr->user_chunk_cache_max = user_chunk_cache_max; } /* This function was added to libpng 1.4.1 */ void PNGAPI -png_set_chunk_malloc_max (png_structp png_ptr, +png_set_chunk_malloc_max (png_structrp png_ptr, png_alloc_size_t user_chunk_malloc_max) { if (png_ptr != NULL) png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; } -#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ +#endif /* ?SET_USER_LIMITS */ #ifdef PNG_BENIGN_ERRORS_SUPPORTED void PNGAPI -png_set_benign_errors(png_structp png_ptr, int allowed) +png_set_benign_errors(png_structrp png_ptr, int allowed) { png_debug(1, "in png_set_benign_errors"); + /* If allowed is 1, png_benign_error() is treated as a warning. + * + * If allowed is 0, png_benign_error() is treated as an error (which + * is the default behavior if png_set_benign_errors() is not called). + */ + if (allowed != 0) - png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN | + PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN; else - png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; + png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN | + PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN); } -#endif /* PNG_BENIGN_ERRORS_SUPPORTED */ +#endif /* BENIGN_ERRORS */ #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED -/* Whether to report invalid palette index; added at libng-1.5.10 - * allowed - one of 0: disable; 1: enable - */ + /* Whether to report invalid palette index; added at libng-1.5.10. + * It is possible for an indexed (color-type==3) PNG file to contain + * pixels with invalid (out-of-range) indexes if the PLTE chunk has + * fewer entries than the image's bit-depth would allow. We recover + * from this gracefully by filling any incomplete palette with zeros + * (opaque black). By default, when this occurs libpng will issue + * a benign error. This API can be used to override that behavior. + */ void PNGAPI -png_set_check_for_invalid_index(png_structp png_ptr, int allowed) +png_set_check_for_invalid_index(png_structrp png_ptr, int allowed) { png_debug(1, "in png_set_check_for_invalid_index"); - if (allowed != 0) + if (allowed > 0) png_ptr->num_palette_max = 0; else png_ptr->num_palette_max = -1; } #endif -#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ + +#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) || \ + defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) +/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, + * and if invalid, correct the keyword rather than discarding the entire + * chunk. The PNG 1.0 specification requires keywords 1-79 characters in + * length, forbids leading or trailing whitespace, multiple internal spaces, + * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. + * + * The 'new_key' buffer must be 80 characters in size (for the keyword plus a + * trailing '\0'). If this routine returns 0 then there was no keyword, or a + * valid one could not be generated, and the caller must png_error. + */ +png_uint_32 /* PRIVATE */ +png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key) +{ + png_const_charp orig_key = key; + png_uint_32 key_len = 0; + int bad_character = 0; + int space = 1; + + png_debug(1, "in png_check_keyword"); + + if (key == NULL) + { + *new_key = 0; + return 0; + } + + while (*key && key_len < 79) + { + png_byte ch = (png_byte)*key++; + + if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/)) + *new_key++ = ch, ++key_len, space = 0; + + else if (space == 0) + { + /* A space or an invalid character when one wasn't seen immediately + * before; output just a space. + */ + *new_key++ = 32, ++key_len, space = 1; + + /* If the character was not a space then it is invalid. */ + if (ch != 32) + bad_character = ch; + } + + else if (bad_character == 0) + bad_character = ch; /* just skip it, record the first error */ + } + + if (key_len > 0 && space != 0) /* trailing space */ + { + --key_len, --new_key; + if (bad_character == 0) + bad_character = 32; + } + + /* Terminate the keyword */ + *new_key = 0; + + if (key_len == 0) + return 0; + +#ifdef PNG_WARNINGS_SUPPORTED + /* Try to only output one warning per keyword: */ + if (*key != 0) /* keyword too long */ + png_warning(png_ptr, "keyword truncated"); + + else if (bad_character != 0) + { + PNG_WARNING_PARAMETERS(p) + + png_warning_parameter(p, 1, orig_key); + png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_02x, bad_character); + + png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'"); + } +#endif /* WARNINGS */ + + return key_len; +} +#endif /* TEXT || pCAL || iCCP || sPLT */ +#endif /* READ || WRITE */ diff --git a/drivers/png/pngstruct.h b/drivers/png/pngstruct.h index 52eef80e69..c1f35edef5 100644 --- a/drivers/png/pngstruct.h +++ b/drivers/png/pngstruct.h @@ -1,7 +1,7 @@ /* pngstruct.h - header file for PNG reference library * - * Last changed in libpng 1.5.23 [July 23, 2015] + * Last changed in libpng 1.6.18 [July 23, 2015] * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) @@ -23,13 +23,130 @@ * in this structure and is required for decompressing the LZ compressed * data in PNG files. */ +#ifndef ZLIB_CONST + /* We must ensure that zlib uses 'const' in declarations. */ +# define ZLIB_CONST +#endif #include "zlib.h" +#ifdef const + /* zlib.h sometimes #defines const to nothing, undo this. */ +# undef const +#endif + +/* zlib.h has mediocre z_const use before 1.2.6, this stuff is for compatibility + * with older builds. + */ +#if ZLIB_VERNUM < 0x1260 +# define PNGZ_MSG_CAST(s) png_constcast(char*,s) +# define PNGZ_INPUT_CAST(b) png_constcast(png_bytep,b) +#else +# define PNGZ_MSG_CAST(s) (s) +# define PNGZ_INPUT_CAST(b) (b) +#endif + +/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib + * can handle at once. This type need be no larger than 16 bits (so maximum of + * 65535), this define allows us to discover how big it is, but limited by the + * maximuum for png_size_t. The value can be overriden in a library build + * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably + * lower value (e.g. 255 works). A lower value may help memory usage (slightly) + * and may even improve performance on some systems (and degrade it on others.) + */ +#ifndef ZLIB_IO_MAX +# define ZLIB_IO_MAX ((uInt)-1) +#endif + +#ifdef PNG_WRITE_SUPPORTED +/* The type of a compression buffer list used by the write code. */ +typedef struct png_compression_buffer +{ + struct png_compression_buffer *next; + png_byte output[1]; /* actually zbuf_size */ +} png_compression_buffer, *png_compression_bufferp; + +#define PNG_COMPRESSION_BUFFER_SIZE(pp)\ + (offsetof(png_compression_buffer, output) + (pp)->zbuffer_size) +#endif + +/* Colorspace support; structures used in png_struct, png_info and in internal + * functions to hold and communicate information about the color space. + * + * PNG_COLORSPACE_SUPPORTED is only required if the application will perform + * colorspace corrections, otherwise all the colorspace information can be + * skipped and the size of libpng can be reduced (significantly) by compiling + * out the colorspace support. + */ +#ifdef PNG_COLORSPACE_SUPPORTED +/* The chromaticities of the red, green and blue colorants and the chromaticity + * of the corresponding white point (i.e. of rgb(1.0,1.0,1.0)). + */ +typedef struct png_xy +{ + png_fixed_point redx, redy; + png_fixed_point greenx, greeny; + png_fixed_point bluex, bluey; + png_fixed_point whitex, whitey; +} png_xy; + +/* The same data as above but encoded as CIE XYZ values. When this data comes + * from chromaticities the sum of the Y values is assumed to be 1.0 + */ +typedef struct png_XYZ +{ + png_fixed_point red_X, red_Y, red_Z; + png_fixed_point green_X, green_Y, green_Z; + png_fixed_point blue_X, blue_Y, blue_Z; +} png_XYZ; +#endif /* COLORSPACE */ + +#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED) +/* A colorspace is all the above plus, potentially, profile information; + * however at present libpng does not use the profile internally so it is only + * stored in the png_info struct (if iCCP is supported.) The rendering intent + * is retained here and is checked. + * + * The file gamma encoding information is also stored here and gamma correction + * is done by libpng, whereas color correction must currently be done by the + * application. + */ +typedef struct png_colorspace +{ +#ifdef PNG_GAMMA_SUPPORTED + png_fixed_point gamma; /* File gamma */ +#endif + +#ifdef PNG_COLORSPACE_SUPPORTED + png_xy end_points_xy; /* End points as chromaticities */ + png_XYZ end_points_XYZ; /* End points as CIE XYZ colorant values */ + png_uint_16 rendering_intent; /* Rendering intent of a profile */ +#endif + + /* Flags are always defined to simplify the code. */ + png_uint_16 flags; /* As defined below */ +} png_colorspace, * PNG_RESTRICT png_colorspacerp; + +typedef const png_colorspace * PNG_RESTRICT png_const_colorspacerp; + +/* General flags for the 'flags' field */ +#define PNG_COLORSPACE_HAVE_GAMMA 0x0001 +#define PNG_COLORSPACE_HAVE_ENDPOINTS 0x0002 +#define PNG_COLORSPACE_HAVE_INTENT 0x0004 +#define PNG_COLORSPACE_FROM_gAMA 0x0008 +#define PNG_COLORSPACE_FROM_cHRM 0x0010 +#define PNG_COLORSPACE_FROM_sRGB 0x0020 +#define PNG_COLORSPACE_ENDPOINTS_MATCH_sRGB 0x0040 +#define PNG_COLORSPACE_MATCHES_sRGB 0x0080 /* exact match on profile */ +#define PNG_COLORSPACE_INVALID 0x8000 +#define PNG_COLORSPACE_CANCEL(flags) (0xffff ^ (flags)) +#endif /* COLORSPACE || GAMMA */ struct png_struct_def { #ifdef PNG_SETJMP_SUPPORTED - jmp_buf longjmp_buffer; /* used in png_error */ + jmp_buf jmp_buf_local; /* New name in 1.6.0 for jmp_buf in png_struct */ png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */ + jmp_buf *jmp_buf_ptr; /* passed to longjmp_fn */ + size_t jmp_buf_size; /* size of the above, if allocated */ #endif png_error_ptr error_fn; /* function for printing errors and aborting */ #ifdef PNG_WARNINGS_SUPPORTED @@ -62,22 +179,12 @@ struct png_struct_def png_uint_32 flags; /* flags indicating various things to libpng */ png_uint_32 transformations; /* which transformations to perform */ - z_stream zstream; /* pointer to decompression structure (below) */ - png_bytep zbuf; /* buffer for zlib */ - uInt zbuf_size; /* size of zbuf (typically 65536) */ -#ifdef PNG_WRITE_SUPPORTED - -/* Added in 1.5.4: state to keep track of whether the zstream has been - * initialized and if so whether it is for IDAT or some other chunk. - */ -#define PNG_ZLIB_UNINITIALIZED 0 -#define PNG_ZLIB_FOR_IDAT 1 -#define PNG_ZLIB_FOR_TEXT 2 /* anything other than IDAT */ -#define PNG_ZLIB_USE_MASK 3 /* bottom two bits */ -#define PNG_ZLIB_IN_USE 4 /* a flag value */ + png_uint_32 zowner; /* ID (chunk type) of zstream owner, 0 if none */ + z_stream zstream; /* decompression structure */ - png_uint_32 zlib_state; /* State of zlib initialization */ -/* End of material added at libpng 1.5.4 */ +#ifdef PNG_WRITE_SUPPORTED + png_compression_bufferp zbuffer_list; /* Created on demand during write */ + uInt zbuffer_size; /* size of the actual buffer */ int zlib_level; /* holds zlib compression level */ int zlib_method; /* holds zlib compression method */ @@ -86,8 +193,7 @@ struct png_struct_def int zlib_strategy; /* holds zlib compression strategy */ #endif /* Added at libpng 1.5.4 */ -#if defined(PNG_WRITE_COMPRESSED_TEXT_SUPPORTED) || \ - defined(PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED) +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED int zlib_text_level; /* holds zlib compression level */ int zlib_text_method; /* holds zlib compression method */ int zlib_text_window_bits; /* holds zlib compression window bits */ @@ -95,6 +201,14 @@ struct png_struct_def int zlib_text_strategy; /* holds zlib compression strategy */ #endif /* End of material added at libpng 1.5.4 */ +/* Added at libpng 1.6.0 */ +#ifdef PNG_WRITE_SUPPORTED + int zlib_set_level; /* Actual values set into the zstream on write */ + int zlib_set_method; + int zlib_set_window_bits; + int zlib_set_mem_level; + int zlib_set_strategy; +#endif png_uint_32 width; /* width of image in pixels */ png_uint_32 height; /* height of image in pixels */ @@ -105,15 +219,19 @@ struct png_struct_def png_uint_32 row_number; /* current row in interlace pass */ png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */ png_bytep prev_row; /* buffer to save previous (unfiltered) row. - * This is a pointer into big_prev_row + * While reading this is a pointer into + * big_prev_row; while writing it is separately + * allocated if needed. */ png_bytep row_buf; /* buffer to save current (unfiltered) row. - * This is a pointer into big_row_buf + * While reading, this is a pointer into + * big_row_buf; while writing it is separately + * allocated. */ - png_bytep sub_row; /* buffer to save "sub" row when filtering */ - png_bytep up_row; /* buffer to save "up" row when filtering */ - png_bytep avg_row; /* buffer to save "avg" row when filtering */ - png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ +#ifdef PNG_WRITE_FILTER_SUPPORTED + png_bytep try_row; /* buffer to save trial row when filtering */ + png_bytep tst_row; /* buffer to save best trial row when filtering */ +#endif png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */ png_uint_32 idat_size; /* current IDAT size for read */ @@ -137,15 +255,17 @@ struct png_struct_def png_byte usr_bit_depth; /* bit depth of users row: write only */ png_byte pixel_depth; /* number of bits per pixel */ png_byte channels; /* number of channels in file */ +#ifdef PNG_WRITE_SUPPORTED png_byte usr_channels; /* channels at start of write: write only */ +#endif png_byte sig_bytes; /* magic bytes read/written from start of file */ png_byte maximum_pixel_depth; /* pixel depth used for the row buffers */ png_byte transformed_pixel_depth; /* pixel depth after read/write transforms */ - png_byte io_chunk_string[5]; - /* string name of chunk */ - +#if PNG_ZLIB_VERNUM >= 0x1240 + png_byte zstream_start; /* at start of an input zlib stream */ +#endif /* Zlib >= 1.2.4 */ #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) png_uint_16 filler; /* filler bytes for pixel expansion */ #endif @@ -158,7 +278,7 @@ struct png_struct_def #ifdef PNG_READ_GAMMA_SUPPORTED png_color_16 background_1; /* background normalized to gamma 1.0 */ #endif -#endif /* PNG_bKGD_SUPPORTED */ +#endif /* bKGD */ #ifdef PNG_WRITE_FLUSH_SUPPORTED png_flush_ptr output_flush_fn; /* Function for flushing output */ @@ -168,7 +288,6 @@ struct png_struct_def #ifdef PNG_READ_GAMMA_SUPPORTED int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */ - png_fixed_point gamma; /* file gamma value */ png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */ png_bytep gamma_table; /* gamma table for 8-bit depth files */ @@ -216,7 +335,7 @@ struct png_struct_def int process_mode; /* what push library is currently doing */ int cur_palette; /* current push library palette index */ -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ +#endif /* PROGRESSIVE_READ */ #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) /* For the Borland special 64K segment handler */ @@ -232,14 +351,17 @@ struct png_struct_def png_bytep quantize_index; /* index translation for palette files */ #endif -#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED) - png_uint_16p hist; /* histogram */ +/* Options */ +#ifdef PNG_SET_OPTION_SUPPORTED + png_byte options; /* On/off state (up to 4 options) */ #endif +#if PNG_LIBPNG_VER < 10700 +/* To do: remove this from libpng-1.7 */ #ifdef PNG_TIME_RFC1123_SUPPORTED - /* This is going to be unused in libpng16 and removed from libpng17 */ char time_buffer[29]; /* String to hold RFC 1123 time text */ #endif +#endif /* New members added in libpng-1.0.6 */ @@ -247,17 +369,16 @@ struct png_struct_def #ifdef PNG_USER_CHUNKS_SUPPORTED png_voidp user_chunk_ptr; +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ #endif - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - int num_chunk_list; - png_bytep chunk_list; #endif -#ifdef PNG_READ_sRGB_SUPPORTED - /* Added in 1.5.5 to record an sRGB chunk in the png. */ - png_byte is_sRGB; +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED + int unknown_default; /* As PNG_HANDLE_* */ + unsigned int num_chunk_list; /* Number of entries in the list */ + png_bytep chunk_list; /* List of png_byte[5]; the textual chunk name + * followed by a PNG_HANDLE_* byte */ #endif /* New members added in libpng-1.0.3 */ @@ -322,16 +443,24 @@ struct png_struct_def #endif /* New member added in libpng-1.0.25 and 1.2.17 */ -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - /* Storage for unknown chunk that the library doesn't recognize. */ +#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + /* Temporary storage for unknown chunk that the library doesn't recognize, + * used while reading the chunk. + */ png_unknown_chunk unknown_chunk; #endif /* New member added in libpng-1.2.26 */ png_size_t old_big_row_buf_size; +#ifdef PNG_READ_SUPPORTED /* New member added in libpng-1.2.30 */ - png_charp chunkdata; /* buffer for reading chunk data */ + png_bytep read_buffer; /* buffer for reading chunk data */ + png_alloc_size_t read_buffer_size; /* current size of the buffer */ +#endif +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED + uInt IDAT_read_size; /* limit on read buffer size for IDAT */ +#endif #ifdef PNG_IO_STATE_SUPPORTED /* New member added in libpng-1.4.0 */ @@ -345,9 +474,10 @@ struct png_struct_def void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info, png_bytep row, png_const_bytep prev_row); - /* Options */ -#ifdef PNG_SET_OPTION_SUPPORTED - png_byte options; /* On/off state (up to 4 options) */ +#ifdef PNG_READ_SUPPORTED +#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED) + png_colorspace colorspace; +#endif #endif }; #endif /* PNGSTRUCT_H */ diff --git a/drivers/png/pngtrans.c b/drivers/png/pngtrans.c index a5df5afe00..7f8cc455d3 100644 --- a/drivers/png/pngtrans.c +++ b/drivers/png/pngtrans.c @@ -1,8 +1,8 @@ /* pngtrans.c - transforms the data in a row (used by both readers and writers) * - * Last changed in libpng 1.5.19 [August 21, 2014] - * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson + * Last changed in libpng 1.6.18 [July 23, 2015] + * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -18,7 +18,7 @@ #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) /* Turn on BGR-to-RGB mapping */ void PNGAPI -png_set_bgr(png_structp png_ptr) +png_set_bgr(png_structrp png_ptr) { png_debug(1, "in png_set_bgr"); @@ -30,9 +30,9 @@ png_set_bgr(png_structp png_ptr) #endif #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* Turn on 16 bit byte swapping */ +/* Turn on 16-bit byte swapping */ void PNGAPI -png_set_swap(png_structp png_ptr) +png_set_swap(png_structrp png_ptr) { png_debug(1, "in png_set_swap"); @@ -47,7 +47,7 @@ png_set_swap(png_structp png_ptr) #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) /* Turn on pixel packing */ void PNGAPI -png_set_packing(png_structp png_ptr) +png_set_packing(png_structrp png_ptr) { png_debug(1, "in png_set_packing"); @@ -57,7 +57,9 @@ png_set_packing(png_structp png_ptr) if (png_ptr->bit_depth < 8) { png_ptr->transformations |= PNG_PACK; - png_ptr->usr_bit_depth = 8; +# ifdef PNG_WRITE_SUPPORTED + png_ptr->usr_bit_depth = 8; +# endif } } #endif @@ -65,7 +67,7 @@ png_set_packing(png_structp png_ptr) #if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) /* Turn on packed pixel swapping */ void PNGAPI -png_set_packswap(png_structp png_ptr) +png_set_packswap(png_structrp png_ptr) { png_debug(1, "in png_set_packswap"); @@ -79,7 +81,7 @@ png_set_packswap(png_structp png_ptr) #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) void PNGAPI -png_set_shift(png_structp png_ptr, png_const_color_8p true_bits) +png_set_shift(png_structrp png_ptr, png_const_color_8p true_bits) { png_debug(1, "in png_set_shift"); @@ -94,11 +96,11 @@ png_set_shift(png_structp png_ptr, png_const_color_8p true_bits) #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ defined(PNG_WRITE_INTERLACING_SUPPORTED) int PNGAPI -png_set_interlace_handling(png_structp png_ptr) +png_set_interlace_handling(png_structrp png_ptr) { png_debug(1, "in png_set_interlace handling"); - if (png_ptr && png_ptr->interlaced) + if (png_ptr != 0 && png_ptr->interlaced != 0) { png_ptr->transformations |= PNG_INTERLACE; return (7); @@ -115,44 +117,91 @@ png_set_interlace_handling(png_structp png_ptr) * that don't like bytes as parameters. */ void PNGAPI -png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc) +png_set_filler(png_structrp png_ptr, png_uint_32 filler, int filler_loc) { png_debug(1, "in png_set_filler"); if (png_ptr == NULL) return; + /* In libpng 1.6 it is possible to determine whether this is a read or write + * operation and therefore to do more checking here for a valid call. + */ + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) + { +# ifdef PNG_READ_FILLER_SUPPORTED + /* On read png_set_filler is always valid, regardless of the base PNG + * format, because other transformations can give a format where the + * filler code can execute (basically an 8 or 16-bit component RGB or G + * format.) + * + * NOTE: usr_channels is not used by the read code! (This has led to + * confusion in the past.) The filler is only used in the read code. + */ + png_ptr->filler = (png_uint_16)filler; +# else + png_app_error(png_ptr, "png_set_filler not supported on read"); + PNG_UNUSED(filler) /* not used in the write case */ + return; +# endif + } + + else /* write */ + { +# ifdef PNG_WRITE_FILLER_SUPPORTED + /* On write the usr_channels parameter must be set correctly at the + * start to record the number of channels in the app-supplied data. + */ + switch (png_ptr->color_type) + { + case PNG_COLOR_TYPE_RGB: + png_ptr->usr_channels = 4; + break; + + case PNG_COLOR_TYPE_GRAY: + if (png_ptr->bit_depth >= 8) + { + png_ptr->usr_channels = 2; + break; + } + + else + { + /* There simply isn't any code in libpng to strip out bits + * from bytes when the components are less than a byte in + * size! + */ + png_app_error(png_ptr, + "png_set_filler is invalid for low bit depth gray output"); + return; + } + + default: + png_app_error(png_ptr, + "png_set_filler: inappropriate color type"); + return; + } +# else + png_app_error(png_ptr, "png_set_filler not supported on write"); + return; +# endif + } + + /* Here on success - libpng supports the operation, set the transformation + * and the flag to say where the filler channel is. + */ png_ptr->transformations |= PNG_FILLER; - png_ptr->filler = (png_uint_16)filler; if (filler_loc == PNG_FILLER_AFTER) png_ptr->flags |= PNG_FLAG_FILLER_AFTER; else png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER; - - /* This should probably go in the "do_read_filler" routine. - * I attempted to do that in libpng-1.0.1a but that caused problems - * so I restored it in libpng-1.0.2a - */ - - if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - png_ptr->usr_channels = 4; - } - - /* Also I added this in libpng-1.0.2a (what happens when we expand - * a less-than-8-bit grayscale to GA?) */ - - if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8) - { - png_ptr->usr_channels = 2; - } } /* Added to libpng-1.2.7 */ void PNGAPI -png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc) +png_set_add_alpha(png_structrp png_ptr, png_uint_32 filler, int filler_loc) { png_debug(1, "in png_set_add_alpha"); @@ -160,7 +209,9 @@ png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc) return; png_set_filler(png_ptr, filler, filler_loc); - png_ptr->transformations |= PNG_ADD_ALPHA; + /* The above may fail to do anything. */ + if ((png_ptr->transformations & PNG_FILLER) != 0) + png_ptr->transformations |= PNG_ADD_ALPHA; } #endif @@ -168,7 +219,7 @@ png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc) #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) void PNGAPI -png_set_swap_alpha(png_structp png_ptr) +png_set_swap_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_swap_alpha"); @@ -182,7 +233,7 @@ png_set_swap_alpha(png_structp png_ptr) #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) void PNGAPI -png_set_invert_alpha(png_structp png_ptr) +png_set_invert_alpha(png_structrp png_ptr) { png_debug(1, "in png_set_invert_alpha"); @@ -195,7 +246,7 @@ png_set_invert_alpha(png_structp png_ptr) #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) void PNGAPI -png_set_invert_mono(png_structp png_ptr) +png_set_invert_mono(png_structrp png_ptr) { png_debug(1, "in png_set_invert_mono"); @@ -262,7 +313,7 @@ png_do_invert(png_row_infop row_info, png_bytep row) #ifdef PNG_16BIT_SUPPORTED #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* Swaps byte order on 16 bit depth images */ +/* Swaps byte order on 16-bit depth images */ void /* PRIVATE */ png_do_swap(png_row_infop row_info, png_bytep row) { @@ -276,9 +327,16 @@ png_do_swap(png_row_infop row_info, png_bytep row) for (i = 0; i < istop; i++, rp += 2) { +#ifdef PNG_BUILTIN_BSWAP16_SUPPORTED + /* Feature added to libpng-1.6.11 for testing purposes, not + * enabled by default. + */ + *(png_uint_16*)rp = __builtin_bswap16(*(png_uint_16*)rp); +#else png_byte t = *rp; *rp = *(rp + 1); *(rp + 1) = t; +#endif } } } @@ -420,7 +478,7 @@ png_do_packswap(png_row_infop row_info, png_bytep row) *rp = table[*rp]; } } -#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */ +#endif /* PACKSWAP || WRITE_PACKSWAP */ #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ defined(PNG_READ_STRIP_ALPHA_SUPPORTED) @@ -547,7 +605,7 @@ png_do_bgr(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_bgr"); - if ((row_info->color_type & PNG_COLOR_MASK_COLOR)) + if ((row_info->color_type & PNG_COLOR_MASK_COLOR) != 0) { png_uint_32 row_width = row_info->width; if (row_info->bit_depth == 8) @@ -617,13 +675,13 @@ png_do_bgr(png_row_infop row_info, png_bytep row) #endif } } -#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */ +#endif /* READ_BGR || WRITE_BGR */ #if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) /* Added at libpng-1.5.10 */ void /* PRIVATE */ -png_do_check_palette_indexes(png_structp png_ptr, png_row_infop row_info) +png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info) { if (png_ptr->num_palette < (1 << row_info->bit_depth) && png_ptr->num_palette > 0) /* num_palette can be 0 in MNG files */ @@ -646,7 +704,7 @@ png_do_check_palette_indexes(png_structp png_ptr, png_row_infop row_info) */ for (; rp > png_ptr->row_buf; rp--) { - if (*rp >> padding != 0) + if ((*rp >> padding) != 0) png_ptr->num_palette_max = 1; padding = 0; } @@ -720,19 +778,30 @@ png_do_check_palette_indexes(png_structp png_ptr, png_row_infop row_info) } } } -#endif /* PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED */ +#endif /* CHECK_FOR_INVALID_INDEX */ #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED void PNGAPI -png_set_user_transform_info(png_structp png_ptr, png_voidp +png_set_user_transform_info(png_structrp png_ptr, png_voidp user_transform_ptr, int user_transform_depth, int user_transform_channels) { png_debug(1, "in png_set_user_transform_info"); if (png_ptr == NULL) return; + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 && + (png_ptr->flags & PNG_FLAG_ROW_INIT) != 0) + { + png_app_error(png_ptr, + "info change after png_start_read_image or png_read_update_info"); + return; + } +#endif + png_ptr->user_transform_ptr = user_transform_ptr; png_ptr->user_transform_depth = (png_byte)user_transform_depth; png_ptr->user_transform_channels = (png_byte)user_transform_channels; @@ -746,20 +815,20 @@ png_set_user_transform_info(png_structp png_ptr, png_voidp */ #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED png_voidp PNGAPI -png_get_user_transform_ptr(png_const_structp png_ptr) +png_get_user_transform_ptr(png_const_structrp png_ptr) { if (png_ptr == NULL) return (NULL); - return ((png_voidp)png_ptr->user_transform_ptr); + return png_ptr->user_transform_ptr; } #endif #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED png_uint_32 PNGAPI -png_get_current_row_number(png_const_structp png_ptr) +png_get_current_row_number(png_const_structrp png_ptr) { - /* See the comments in png.h - this is the sub-image row when reading and + /* See the comments in png.h - this is the sub-image row when reading an * interlaced image. */ if (png_ptr != NULL) @@ -769,13 +838,12 @@ png_get_current_row_number(png_const_structp png_ptr) } png_byte PNGAPI -png_get_current_pass_number(png_const_structp png_ptr) +png_get_current_pass_number(png_const_structrp png_ptr) { if (png_ptr != NULL) return png_ptr->pass; return 8; /* invalid */ } -#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */ -#endif /* PNG_READ_USER_TRANSFORM_SUPPORTED || - PNG_WRITE_USER_TRANSFORM_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ +#endif /* USER_TRANSFORM_INFO */ +#endif /* READ_USER_TRANSFORM || WRITE_USER_TRANSFORM */ +#endif /* READ || WRITE */ diff --git a/drivers/png/pngwio.c b/drivers/png/pngwio.c index cc55521452..586c03b721 100644 --- a/drivers/png/pngwio.c +++ b/drivers/png/pngwio.c @@ -1,7 +1,7 @@ /* pngwio.c - functions for data output * - * Last changed in libpng 1.5.18 [February 6, 2014] + * Last changed in libpng 1.6.15 [November 20, 2014] * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) @@ -26,15 +26,16 @@ * writes to a file pointer. Note that this routine sometimes gets called * with very small lengths, so you should implement some kind of simple * buffering if you are using unbuffered writes. This should never be asked - * to write more than 64K on a 16 bit machine. + * to write more than 64K on a 16-bit machine. */ void /* PRIVATE */ -png_write_data(png_structp png_ptr, png_const_bytep data, png_size_t length) +png_write_data(png_structrp png_ptr, png_const_bytep data, png_size_t length) { /* NOTE: write_data_fn must not change the buffer! */ if (png_ptr->write_data_fn != NULL ) - (*(png_ptr->write_data_fn))(png_ptr, (png_bytep)data, length); + (*(png_ptr->write_data_fn))(png_ptr, png_constcast(png_bytep,data), + length); else png_error(png_ptr, "Call to NULL write function"); @@ -46,7 +47,6 @@ png_write_data(png_structp png_ptr, png_const_bytep data, png_size_t length) * write_data function and use it at run time with png_set_write_fn(), rather * than changing the library. */ -#ifndef USE_FAR_KEYWORD void PNGCBAPI png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) { @@ -60,64 +60,6 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) if (check != length) png_error(png_ptr, "Write Error"); } -#else -/* This is the model-independent version. Since the standard I/O library - * can't handle far buffers in the medium and small models, we have to copy - * the data. - */ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -void PNGCBAPI -png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_uint_32 check; - png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */ - png_FILE_p io_ptr; - - if (png_ptr == NULL) - return; - - /* Check if data really is near. If so, use usual code. */ - near_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); - - if ((png_bytep)near_data == data) - { - check = fwrite(near_data, 1, length, io_ptr); - } - - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t written, remaining, err; - check = 0; - remaining = length; - - do - { - written = MIN(NEAR_BUF_SIZE, remaining); - png_memcpy(buf, data, written); /* Copy far buffer to near buffer */ - err = fwrite(buf, 1, written, io_ptr); - - if (err != written) - break; - - else - check += err; - - data += written; - remaining -= written; - } - while (remaining != 0); - } - - if (check != length) - png_error(png_ptr, "Write Error"); -} - -#endif #endif /* This function is called to output any data pending writing (normally @@ -126,7 +68,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length) */ #ifdef PNG_WRITE_FLUSH_SUPPORTED void /* PRIVATE */ -png_flush(png_structp png_ptr) +png_flush(png_structrp png_ptr) { if (png_ptr->output_flush_fn != NULL) (*(png_ptr->output_flush_fn))(png_ptr); @@ -141,7 +83,7 @@ png_default_flush(png_structp png_ptr) if (png_ptr == NULL) return; - io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr)); + io_ptr = png_voidcast(png_FILE_p, (png_ptr->io_ptr)); fflush(io_ptr); } # endif @@ -177,7 +119,7 @@ png_default_flush(png_structp png_ptr) * *FILE structure. */ void PNGAPI -png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, +png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn) { if (png_ptr == NULL) @@ -209,8 +151,9 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, # endif #else PNG_UNUSED(output_flush_fn) -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ +#endif /* WRITE_FLUSH */ +#ifdef PNG_READ_SUPPORTED /* It is an error to read while writing a png file */ if (png_ptr->read_data_fn != NULL) { @@ -220,37 +163,6 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr, "Can't set both read_data_fn and write_data_fn in the" " same structure"); } -} - -#ifdef USE_FAR_KEYWORD -# ifdef _MSC_VER -void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - FP_OFF(near_ptr) = FP_OFF(ptr); - far_ptr = (void FAR *)near_ptr; - - if (check != 0) - if (FP_SEG(ptr) != FP_SEG(far_ptr)) - png_error(png_ptr, "segment lost in conversion"); - - return(near_ptr); -} -# else -void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check) -{ - void *near_ptr; - void FAR *far_ptr; - near_ptr = (void FAR *)ptr; - far_ptr = (void FAR *)near_ptr; - - if (check != 0) - if (far_ptr != ptr) - png_error(png_ptr, "segment lost in conversion"); - - return(near_ptr); -} -# endif #endif -#endif /* PNG_WRITE_SUPPORTED */ +} +#endif /* WRITE */ diff --git a/drivers/png/pngwrite.c b/drivers/png/pngwrite.c index 776c23603a..181a899438 100644 --- a/drivers/png/pngwrite.c +++ b/drivers/png/pngwrite.c @@ -1,7 +1,7 @@ /* pngwrite.c - general routines to write a PNG file * - * Last changed in libpng 1.5.23 [July 23, 2015] + * Last changed in libpng 1.6.19 [November 12, 2015] * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) @@ -12,9 +12,65 @@ */ #include "pngpriv.h" +#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED +# include <errno.h> +#endif /* SIMPLIFIED_WRITE_STDIO */ #ifdef PNG_WRITE_SUPPORTED +#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED +/* Write out all the unknown chunks for the current given location */ +static void +write_unknown_chunks(png_structrp png_ptr, png_const_inforp info_ptr, + unsigned int where) +{ + if (info_ptr->unknown_chunks_num != 0) + { + png_const_unknown_chunkp up; + + png_debug(5, "writing extra chunks"); + + for (up = info_ptr->unknown_chunks; + up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; + ++up) + if ((up->location & where) != 0) + { + /* If per-chunk unknown chunk handling is enabled use it, otherwise + * just write the chunks the application has set. + */ +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED + int keep = png_handle_as_unknown(png_ptr, up->name); + + /* NOTE: this code is radically different from the read side in the + * matter of handling an ancillary unknown chunk. In the read side + * the default behavior is to discard it, in the code below the default + * behavior is to write it. Critical chunks are, however, only + * written if explicitly listed or if the default is set to write all + * unknown chunks. + * + * The default handling is also slightly weird - it is not possible to + * stop the writing of all unsafe-to-copy chunks! + * + * TODO: REVIEW: this would seem to be a bug. + */ + if (keep != PNG_HANDLE_CHUNK_NEVER && + ((up->name[3] & 0x20) /* safe-to-copy overrides everything */ || + keep == PNG_HANDLE_CHUNK_ALWAYS || + (keep == PNG_HANDLE_CHUNK_AS_DEFAULT && + png_ptr->unknown_default == PNG_HANDLE_CHUNK_ALWAYS))) +#endif + { + /* TODO: review, what is wrong with a zero length unknown chunk? */ + if (up->size == 0) + png_warning(png_ptr, "Writing zero-length unknown chunk"); + + png_write_chunk(png_ptr, up->name, up->data, up->size); + } + } + } +} +#endif /* WRITE_UNKNOWN_CHUNKS */ + /* Writes all the PNG information. This is the suggested way to use the * library. If you have a new chunk to add, make a function to write it, * and put it in the correct location here. If you want the chunk written @@ -25,21 +81,21 @@ * them in png_write_end(), and compressing them. */ void PNGAPI -png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) +png_write_info_before_PLTE(png_structrp png_ptr, png_const_inforp info_ptr) { png_debug(1, "in png_write_info_before_PLTE"); if (png_ptr == NULL || info_ptr == NULL) return; - if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) + if ((png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE) == 0) { /* Write PNG signature */ png_write_sig(png_ptr); #ifdef PNG_MNG_FEATURES_SUPPORTED - if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \ - (png_ptr->mng_features_permitted)) + if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) != 0 && \ + png_ptr->mng_features_permitted != 0) { png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); @@ -49,79 +105,91 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) /* Write IHDR information. */ png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height, - info_ptr->bit_depth, info_ptr->color_type, - info_ptr->compression_type, info_ptr->filter_type, + info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type, + info_ptr->filter_type, #ifdef PNG_WRITE_INTERLACING_SUPPORTED info_ptr->interlace_type #else 0 #endif - ); + ); + /* The rest of these check to see if the valid field has the appropriate * flag set, and if it does, writes the chunk. + * + * 1.6.0: COLORSPACE support controls the writing of these chunks too, and + * the chunks will be written if the WRITE routine is there and + * information * is available in the COLORSPACE. (See + * png_colorspace_sync_info in png.c for where the valid flags get set.) + * + * Under certain circumstances the colorspace can be invalidated without + * syncing the info_struct 'valid' flags; this happens if libpng detects + * an error and calls png_error while the color space is being set, yet + * the application continues writing the PNG. So check the 'invalid' + * flag here too. */ -#ifdef PNG_WRITE_gAMA_SUPPORTED - if (info_ptr->valid & PNG_INFO_gAMA) - png_write_gAMA_fixed(png_ptr, info_ptr->gamma); -#endif -#ifdef PNG_WRITE_sRGB_SUPPORTED - if (info_ptr->valid & PNG_INFO_sRGB) - png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent); +#ifdef PNG_GAMMA_SUPPORTED +# ifdef PNG_WRITE_gAMA_SUPPORTED + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && + (info_ptr->colorspace.flags & PNG_COLORSPACE_FROM_gAMA) != 0 && + (info_ptr->valid & PNG_INFO_gAMA) != 0) + png_write_gAMA_fixed(png_ptr, info_ptr->colorspace.gamma); +# endif #endif -#ifdef PNG_WRITE_iCCP_SUPPORTED - if (info_ptr->valid & PNG_INFO_iCCP) - png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE, - (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); -#endif +#ifdef PNG_COLORSPACE_SUPPORTED + /* Write only one of sRGB or an ICC profile. If a profile was supplied + * and it matches one of the known sRGB ones issue a warning. + */ +# ifdef PNG_WRITE_iCCP_SUPPORTED + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && + (info_ptr->valid & PNG_INFO_iCCP) != 0) + { +# ifdef PNG_WRITE_sRGB_SUPPORTED + if ((info_ptr->valid & PNG_INFO_sRGB) != 0) + png_app_warning(png_ptr, + "profile matches sRGB but writing iCCP instead"); +# endif + + png_write_iCCP(png_ptr, info_ptr->iccp_name, + info_ptr->iccp_profile); + } +# ifdef PNG_WRITE_sRGB_SUPPORTED + else +# endif +# endif + +# ifdef PNG_WRITE_sRGB_SUPPORTED + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && + (info_ptr->valid & PNG_INFO_sRGB) != 0) + png_write_sRGB(png_ptr, info_ptr->colorspace.rendering_intent); +# endif /* WRITE_sRGB */ +#endif /* COLORSPACE */ + #ifdef PNG_WRITE_sBIT_SUPPORTED - if (info_ptr->valid & PNG_INFO_sBIT) - png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); + if ((info_ptr->valid & PNG_INFO_sBIT) != 0) + png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); #endif -#ifdef PNG_WRITE_cHRM_SUPPORTED - if (info_ptr->valid & PNG_INFO_cHRM) - png_write_cHRM_fixed(png_ptr, - info_ptr->x_white, info_ptr->y_white, - info_ptr->x_red, info_ptr->y_red, - info_ptr->x_green, info_ptr->y_green, - info_ptr->x_blue, info_ptr->y_blue); + +#ifdef PNG_COLORSPACE_SUPPORTED +# ifdef PNG_WRITE_cHRM_SUPPORTED + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && + (info_ptr->colorspace.flags & PNG_COLORSPACE_FROM_cHRM) != 0 && + (info_ptr->valid & PNG_INFO_cHRM) != 0) + png_write_cHRM_fixed(png_ptr, &info_ptr->colorspace.end_points_xy); +# endif #endif #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep = png_handle_as_unknown(png_ptr, up->name); - - if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && - !(up->location & PNG_HAVE_PLTE) && - !(up->location & PNG_HAVE_IDAT) && - !(up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - if (up->size == 0) - png_warning(png_ptr, "Writing zero-length unknown chunk"); - - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } + write_unknown_chunks(png_ptr, info_ptr, PNG_HAVE_IHDR); #endif + png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE; } } void PNGAPI -png_write_info(png_structp png_ptr, png_infop info_ptr) +png_write_info(png_structrp png_ptr, png_const_inforp info_ptr) { #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) int i; @@ -134,7 +202,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) png_write_info_before_PLTE(png_ptr, info_ptr); - if (info_ptr->valid & PNG_INFO_PLTE) + if ((info_ptr->valid & PNG_INFO_PLTE) != 0) png_write_PLTE(png_ptr, info_ptr->palette, (png_uint_32)info_ptr->num_palette); @@ -142,15 +210,20 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) png_error(png_ptr, "Valid palette required for paletted images"); #ifdef PNG_WRITE_tRNS_SUPPORTED - if (info_ptr->valid & PNG_INFO_tRNS) + if ((info_ptr->valid & PNG_INFO_tRNS) !=0) { #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED /* Invert the alpha channel (in tRNS) */ - if ((png_ptr->transformations & PNG_INVERT_ALPHA) && + if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0 && info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) { - int j; - for (j = 0; j<(int)info_ptr->num_trans; j++) + int j, jend; + + jend = info_ptr->num_trans; + if (jend > PNG_MAX_PALETTE_LENGTH) + jend = PNG_MAX_PALETTE_LENGTH; + + for (j = 0; j<jend; ++j) info_ptr->trans_alpha[j] = (png_byte)(255 - info_ptr->trans_alpha[j]); } @@ -160,42 +233,42 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) } #endif #ifdef PNG_WRITE_bKGD_SUPPORTED - if (info_ptr->valid & PNG_INFO_bKGD) + if ((info_ptr->valid & PNG_INFO_bKGD) != 0) png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type); #endif #ifdef PNG_WRITE_hIST_SUPPORTED - if (info_ptr->valid & PNG_INFO_hIST) + if ((info_ptr->valid & PNG_INFO_hIST) != 0) png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette); #endif #ifdef PNG_WRITE_oFFs_SUPPORTED - if (info_ptr->valid & PNG_INFO_oFFs) + if ((info_ptr->valid & PNG_INFO_oFFs) != 0) png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset, info_ptr->offset_unit_type); #endif #ifdef PNG_WRITE_pCAL_SUPPORTED - if (info_ptr->valid & PNG_INFO_pCAL) + if ((info_ptr->valid & PNG_INFO_pCAL) != 0) png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0, info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams, info_ptr->pcal_units, info_ptr->pcal_params); #endif #ifdef PNG_WRITE_sCAL_SUPPORTED - if (info_ptr->valid & PNG_INFO_sCAL) + if ((info_ptr->valid & PNG_INFO_sCAL) != 0) png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit, info_ptr->scal_s_width, info_ptr->scal_s_height); #endif /* sCAL */ #ifdef PNG_WRITE_pHYs_SUPPORTED - if (info_ptr->valid & PNG_INFO_pHYs) + if ((info_ptr->valid & PNG_INFO_pHYs) != 0) png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit, info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type); #endif /* pHYs */ #ifdef PNG_WRITE_tIME_SUPPORTED - if (info_ptr->valid & PNG_INFO_tIME) + if ((info_ptr->valid & PNG_INFO_tIME) != 0) { png_write_tIME(png_ptr, &(info_ptr->mod_time)); png_ptr->mode |= PNG_WROTE_tIME; @@ -203,7 +276,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) #endif /* tIME */ #ifdef PNG_WRITE_sPLT_SUPPORTED - if (info_ptr->valid & PNG_INFO_sPLT) + if ((info_ptr->valid & PNG_INFO_sPLT) != 0) for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) png_write_sPLT(png_ptr, info_ptr->splt_palettes + i); #endif /* sPLT */ @@ -241,8 +314,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_WRITE_zTXt_SUPPORTED /* Write compressed chunk */ png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); + info_ptr->text[i].text, info_ptr->text[i].compression); /* Mark this chunk as written */ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; #else @@ -268,29 +340,7 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) #endif /* tEXt */ #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep = png_handle_as_unknown(png_ptr, up->name); - if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && - (up->location & PNG_HAVE_PLTE) && - !(up->location & PNG_HAVE_IDAT) && - !(up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } + write_unknown_chunks(png_ptr, info_ptr, PNG_HAVE_PLTE); #endif } @@ -300,14 +350,14 @@ png_write_info(png_structp png_ptr, png_infop info_ptr) * comments, I suggest writing them here, and compressing them. */ void PNGAPI -png_write_end(png_structp png_ptr, png_infop info_ptr) +png_write_end(png_structrp png_ptr, png_inforp info_ptr) { png_debug(1, "in png_write_end"); if (png_ptr == NULL) return; - if (!(png_ptr->mode & PNG_HAVE_IDAT)) + if ((png_ptr->mode & PNG_HAVE_IDAT) == 0) png_error(png_ptr, "No IDATs written into file"); #ifdef PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED @@ -323,8 +373,8 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) #endif #ifdef PNG_WRITE_tIME_SUPPORTED /* Check to see if user has supplied a time chunk */ - if ((info_ptr->valid & PNG_INFO_tIME) && - !(png_ptr->mode & PNG_WROTE_tIME)) + if ((info_ptr->valid & PNG_INFO_tIME) != 0 && + (png_ptr->mode & PNG_WROTE_tIME) == 0) png_write_tIME(png_ptr, &(info_ptr->mod_time)); #endif @@ -346,7 +396,10 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) info_ptr->text[i].lang_key, info_ptr->text[i].text); /* Mark this chunk as written */ - info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; + if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) + info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; + else + info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; #else png_warning(png_ptr, "Unable to write international text"); #endif @@ -357,8 +410,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_WRITE_zTXt_SUPPORTED /* Write compressed chunk */ png_write_zTXt(png_ptr, info_ptr->text[i].key, - info_ptr->text[i].text, 0, - info_ptr->text[i].compression); + info_ptr->text[i].text, info_ptr->text[i].compression); /* Mark this chunk as written */ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; #else @@ -381,27 +433,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) } #endif #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED - if (info_ptr->unknown_chunks_num) - { - png_unknown_chunk *up; - - png_debug(5, "writing extra chunks"); - - for (up = info_ptr->unknown_chunks; - up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; - up++) - { - int keep = png_handle_as_unknown(png_ptr, up->name); - if (keep != PNG_HANDLE_CHUNK_NEVER && - up->location && - (up->location & PNG_AFTER_IDAT) && - ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || - (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) - { - png_write_chunk(png_ptr, up->name, up->data, up->size); - } - } - } + write_unknown_chunks(png_ptr, info_ptr, PNG_AFTER_IDAT); #endif } @@ -409,6 +441,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) /* Write end of PNG file */ png_write_IEND(png_ptr); + /* This flush, added in libpng-1.0.8, removed from libpng-1.0.9beta03, * and restored again in libpng-1.2.30, may cause some applications that * do not set png_ptr->output_flush_fn to crash. If your application @@ -425,7 +458,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr) #ifdef PNG_CONVERT_tIME_SUPPORTED void PNGAPI -png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime) +png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm * ttime) { png_debug(1, "in png_convert_from_struct_tm"); @@ -454,96 +487,75 @@ PNG_FUNCTION(png_structp,PNGAPI png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) { -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); +#ifndef PNG_USER_MEM_SUPPORTED + png_structrp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, NULL, NULL, NULL); +#else + return png_create_write_struct_2(user_png_ver, error_ptr, error_fn, + warn_fn, NULL, NULL, NULL); } +/* Alternate initialize png_ptr structure, and allocate any memory needed */ PNG_FUNCTION(png_structp,PNGAPI png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) { -#endif /* PNG_USER_MEM_SUPPORTED */ - volatile int png_cleanup_needed = 0; -#ifdef PNG_SETJMP_SUPPORTED - volatile -#endif - png_structp png_ptr; -#ifdef PNG_SETJMP_SUPPORTED -#ifdef USE_FAR_KEYWORD - jmp_buf tmp_jmpbuf; -#endif -#endif - - png_debug(1, "in png_create_write_struct"); - -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); -#else - png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); -#endif /* PNG_USER_MEM_SUPPORTED */ - if (png_ptr == NULL) - return (NULL); + png_structrp png_ptr = png_create_png_struct(user_png_ver, error_ptr, + error_fn, warn_fn, mem_ptr, malloc_fn, free_fn); +#endif /* USER_MEM */ + if (png_ptr != NULL) + { + /* Set the zlib control values to defaults; they can be overridden by the + * application after the struct has been created. + */ + png_ptr->zbuffer_size = PNG_ZBUF_SIZE; - /* Added at libpng-1.2.6 */ -#ifdef PNG_SET_USER_LIMITS_SUPPORTED - png_ptr->user_width_max = PNG_USER_WIDTH_MAX; - png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; + /* The 'zlib_strategy' setting is irrelevant because png_default_claim in + * pngwutil.c defaults it according to whether or not filters will be + * used, and ignores this setting. + */ + png_ptr->zlib_strategy = PNG_Z_DEFAULT_STRATEGY; + png_ptr->zlib_level = PNG_Z_DEFAULT_COMPRESSION; + png_ptr->zlib_mem_level = 8; + png_ptr->zlib_window_bits = 15; + png_ptr->zlib_method = 8; + +#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED + png_ptr->zlib_text_strategy = PNG_TEXT_Z_DEFAULT_STRATEGY; + png_ptr->zlib_text_level = PNG_TEXT_Z_DEFAULT_COMPRESSION; + png_ptr->zlib_text_mem_level = 8; + png_ptr->zlib_text_window_bits = 15; + png_ptr->zlib_text_method = 8; +#endif /* WRITE_COMPRESSED_TEXT */ + + /* This is a highly dubious configuration option; by default it is off, + * but it may be appropriate for private builds that are testing + * extensions not conformant to the current specification, or of + * applications that must not fail to write at all costs! + */ +#ifdef PNG_BENIGN_WRITE_ERRORS_SUPPORTED + /* In stable builds only warn if an application error can be completely + * handled. + */ + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; #endif -#ifdef PNG_SETJMP_SUPPORTED -/* Applications that neglect to set up their own setjmp() and then - * encounter a png_error() will longjmp here. Since the jmpbuf is - * then meaningless we abort instead of returning. - */ -#ifdef USE_FAR_KEYWORD - if (setjmp(tmp_jmpbuf)) - png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); - PNG_ABORT(); -#else - if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */ - PNG_ABORT(); -#endif + /* App warnings are warnings in release (or release candidate) builds but + * are errors during development. + */ +#if PNG_RELEASE_BUILD + png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN; #endif -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif /* PNG_USER_MEM_SUPPORTED */ - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - if (!png_user_version_check(png_ptr, user_png_ver)) - png_cleanup_needed = 1; - - /* Initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - - if (png_cleanup_needed == 0) - { - png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, - png_ptr->zbuf_size); - if (png_ptr->zbuf == NULL) - png_cleanup_needed = 1; - } - - if (png_cleanup_needed != 0) - { - /* Clean up PNG structure and deallocate any memory. */ - png_free(png_ptr, png_ptr->zbuf); - png_ptr->zbuf = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, - (png_free_ptr)free_fn, (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - return (NULL); + /* TODO: delay this, it can be done in png_init_io() (if the app doesn't + * do it itself) avoiding setting the default function if it is not + * required. + */ + png_set_write_fn(png_ptr, NULL, NULL, NULL); } - png_set_write_fn(png_ptr, NULL, NULL, NULL); - - return (png_ptr); + return png_ptr; } @@ -553,7 +565,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, * "write" the image seven times. */ void PNGAPI -png_write_rows(png_structp png_ptr, png_bytepp row, +png_write_rows(png_structrp png_ptr, png_bytepp row, png_uint_32 num_rows) { png_uint_32 i; /* row counter */ @@ -575,7 +587,7 @@ png_write_rows(png_structp png_ptr, png_bytepp row, * if you are writing an interlaced image. */ void PNGAPI -png_write_image(png_structp png_ptr, png_bytepp image) +png_write_image(png_structrp png_ptr, png_bytepp image) { png_uint_32 i; /* row index */ int pass, num_pass; /* pass variables */ @@ -605,9 +617,74 @@ png_write_image(png_structp png_ptr, png_bytepp image) } } +#ifdef PNG_MNG_FEATURES_SUPPORTED +/* Performs intrapixel differencing */ +static void +png_do_write_intrapixel(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_write_intrapixel"); + + if ((row_info->color_type & PNG_COLOR_MASK_COLOR) != 0) + { + int bytes_per_pixel; + png_uint_32 row_width = row_info->width; + if (row_info->bit_depth == 8) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 3; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 4; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + *(rp) = (png_byte)(*rp - *(rp + 1)); + *(rp + 2) = (png_byte)(*(rp + 2) - *(rp + 1)); + } + } + +#ifdef PNG_WRITE_16BIT_SUPPORTED + else if (row_info->bit_depth == 16) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 6; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 8; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); + png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); + png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); + png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL); + png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL); + *(rp ) = (png_byte)(red >> 8); + *(rp + 1) = (png_byte)red; + *(rp + 4) = (png_byte)(blue >> 8); + *(rp + 5) = (png_byte)blue; + } + } +#endif /* WRITE_16BIT */ + } +} +#endif /* MNG_FEATURES */ + /* Called by user to write a row of image data */ void PNGAPI -png_write_row(png_structp png_ptr, png_const_bytep row) +png_write_row(png_structrp png_ptr, png_const_bytep row) { /* 1.5.6: moved from png_struct to be a local structure: */ png_row_info row_info; @@ -622,44 +699,44 @@ png_write_row(png_structp png_ptr, png_const_bytep row) if (png_ptr->row_number == 0 && png_ptr->pass == 0) { /* Make sure we wrote the header info */ - if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) + if ((png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE) == 0) png_error(png_ptr, "png_write_info was never called before png_write_row"); /* Check for transforms that have been set but were defined out */ #if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) + if ((png_ptr->transformations & PNG_INVERT_MONO) != 0) png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined"); #endif #if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) + if ((png_ptr->transformations & PNG_FILLER) != 0) png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined"); #endif #if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \ defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) + if ((png_ptr->transformations & PNG_PACKSWAP) != 0) png_warning(png_ptr, "PNG_WRITE_PACKSWAP_SUPPORTED is not defined"); #endif #if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) + if ((png_ptr->transformations & PNG_PACK) != 0) png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined"); #endif #if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) + if ((png_ptr->transformations & PNG_SHIFT) != 0) png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined"); #endif #if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) + if ((png_ptr->transformations & PNG_BGR) != 0) png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined"); #endif #if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) + if ((png_ptr->transformations & PNG_SWAP_BYTES) != 0) png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined"); #endif @@ -668,12 +745,13 @@ png_write_row(png_structp png_ptr, png_const_bytep row) #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* If interlaced and not interested in row, return */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) + if (png_ptr->interlaced != 0 && + (png_ptr->transformations & PNG_INTERLACE) != 0) { switch (png_ptr->pass) { case 0: - if (png_ptr->row_number & 0x07) + if ((png_ptr->row_number & 0x07) != 0) { png_write_finish_row(png_ptr); return; @@ -681,7 +759,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) break; case 1: - if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) + if ((png_ptr->row_number & 0x07) != 0 || png_ptr->width < 5) { png_write_finish_row(png_ptr); return; @@ -697,7 +775,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) break; case 3: - if ((png_ptr->row_number & 0x03) || png_ptr->width < 3) + if ((png_ptr->row_number & 0x03) != 0 || png_ptr->width < 3) { png_write_finish_row(png_ptr); return; @@ -713,7 +791,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) break; case 5: - if ((png_ptr->row_number & 0x01) || png_ptr->width < 2) + if ((png_ptr->row_number & 0x01) != 0 || png_ptr->width < 2) { png_write_finish_row(png_ptr); return; @@ -721,7 +799,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) break; case 6: - if (!(png_ptr->row_number & 0x01)) + if ((png_ptr->row_number & 0x01) == 0) { png_write_finish_row(png_ptr); return; @@ -750,12 +828,12 @@ png_write_row(png_structp png_ptr, png_const_bytep row) png_debug1(3, "row_info->rowbytes = %lu", (unsigned long)row_info.rowbytes); /* Copy user's row into buffer, leaving room for filter byte. */ - png_memcpy(png_ptr->row_buf + 1, row, row_info.rowbytes); + memcpy(png_ptr->row_buf + 1, row, row_info.rowbytes); #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Handle interlacing */ if (png_ptr->interlaced && png_ptr->pass < 6 && - (png_ptr->transformations & PNG_INTERLACE)) + (png_ptr->transformations & PNG_INTERLACE) != 0) { png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass); /* This should always get caught above, but still ... */ @@ -769,7 +847,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED /* Handle other transformations */ - if (png_ptr->transformations) + if (png_ptr->transformations != 0) png_do_write_transformations(png_ptr, &row_info); #endif @@ -777,7 +855,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) * which is also the output depth. */ if (row_info.pixel_depth != png_ptr->pixel_depth || - row_info.pixel_depth != png_ptr->transformed_pixel_depth) + row_info.pixel_depth != png_ptr->transformed_pixel_depth) png_error(png_ptr, "internal write transform logic error"); #ifdef PNG_MNG_FEATURES_SUPPORTED @@ -790,7 +868,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) * 4. The filter_method is 64 and * 5. The color_type is RGB or RGBA */ - if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && + if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 && (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) { /* Intrapixel differencing */ @@ -816,7 +894,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row) #ifdef PNG_WRITE_FLUSH_SUPPORTED /* Set the automatic flush interval or 0 to turn flushing off */ void PNGAPI -png_set_flush(png_structp png_ptr, int nrows) +png_set_flush(png_structrp png_ptr, int nrows) { png_debug(1, "in png_set_flush"); @@ -828,10 +906,8 @@ png_set_flush(png_structp png_ptr, int nrows) /* Flush the current output buffers now */ void PNGAPI -png_write_flush(png_structp png_ptr) +png_write_flush(png_structrp png_ptr) { - int wrote_IDAT; - png_debug(1, "in png_write_flush"); if (png_ptr == NULL) @@ -841,175 +917,76 @@ png_write_flush(png_structp png_ptr) if (png_ptr->row_number >= png_ptr->num_rows) return; - do - { - int ret; - - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH); - wrote_IDAT = 0; - - /* Check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - - if ((png_ptr->zstream.avail_out) == 0) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - wrote_IDAT = 1; - } - } while (wrote_IDAT == 1); - - /* If there is any data left to be output, write it into a new IDAT */ - if (png_ptr->zbuf_size != png_ptr->zstream.avail_out) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - } + png_compress_IDAT(png_ptr, NULL, 0, Z_SYNC_FLUSH); png_ptr->flush_rows = 0; png_flush(png_ptr); } -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ +#endif /* WRITE_FLUSH */ -/* Free all memory used by the write */ -void PNGAPI -png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) +/* Free any memory used in png_ptr struct without freeing the struct itself. */ +static void +png_write_destroy(png_structrp png_ptr) { - png_structp png_ptr = NULL; - png_infop info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; - png_voidp mem_ptr = NULL; -#endif - - png_debug(1, "in png_destroy_write_struct"); - - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - -#ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr != NULL) - { - free_fn = png_ptr->free_fn; - mem_ptr = png_ptr->mem_ptr; - } -#endif - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (info_ptr != NULL) - { - if (png_ptr != NULL) - { - png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - if (png_ptr->num_chunk_list) - { - png_free(png_ptr, png_ptr->chunk_list); - png_ptr->num_chunk_list = 0; - } -#endif - } - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = NULL; - } - - if (png_ptr != NULL) - { - png_write_destroy(png_ptr); -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, - (png_voidp)mem_ptr); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = NULL; - } -} - - -/* Free any memory used in png_ptr struct (old method) */ -void /* PRIVATE */ -png_write_destroy(png_structp png_ptr) -{ -#ifdef PNG_SETJMP_SUPPORTED - jmp_buf tmp_jmp; /* Save jump buffer */ -#endif - png_error_ptr error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_error_ptr warning_fn; -#endif - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - png_debug(1, "in png_write_destroy"); /* Free any memory zlib uses */ - if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0) deflateEnd(&png_ptr->zstream); /* Free our memory. png_free checks NULL for us. */ - png_free(png_ptr, png_ptr->zbuf); + png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); png_free(png_ptr, png_ptr->row_buf); + png_ptr->row_buf = NULL; #ifdef PNG_WRITE_FILTER_SUPPORTED png_free(png_ptr, png_ptr->prev_row); - png_free(png_ptr, png_ptr->sub_row); - png_free(png_ptr, png_ptr->up_row); - png_free(png_ptr, png_ptr->avg_row); - png_free(png_ptr, png_ptr->paeth_row); + png_free(png_ptr, png_ptr->try_row); + png_free(png_ptr, png_ptr->tst_row); + png_ptr->prev_row = NULL; + png_ptr->try_row = NULL; + png_ptr->tst_row = NULL; #endif -#ifdef PNG_SETJMP_SUPPORTED - /* Reset structure */ - png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED + png_free(png_ptr, png_ptr->chunk_list); + png_ptr->chunk_list = NULL; #endif - error_fn = png_ptr->error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - warning_fn = png_ptr->warning_fn; -#endif - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif + /* The error handling and memory handling information is left intact at this + * point: the jmp_buf may still have to be freed. See png_destroy_png_struct + * for how this happens. + */ +} - png_memset(png_ptr, 0, png_sizeof(png_struct)); +/* Free all memory used by the write. + * In libpng 1.6.0 this API changed quietly to no longer accept a NULL value for + * *png_ptr_ptr. Prior to 1.6.0 it would accept such a value and it would free + * the passed in info_structs but it would quietly fail to free any of the data + * inside them. In 1.6.0 it quietly does nothing (it has to be quiet because it + * has no png_ptr.) + */ +void PNGAPI +png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) +{ + png_debug(1, "in png_destroy_write_struct"); - png_ptr->error_fn = error_fn; -#ifdef PNG_WARNINGS_SUPPORTED - png_ptr->warning_fn = warning_fn; -#endif - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif + if (png_ptr_ptr != NULL) + { + png_structrp png_ptr = *png_ptr_ptr; -#ifdef PNG_SETJMP_SUPPORTED - png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); -#endif + if (png_ptr != NULL) /* added in libpng 1.6.0 */ + { + png_destroy_info_struct(png_ptr, info_ptr_ptr); + + *png_ptr_ptr = NULL; + png_write_destroy(png_ptr); + png_destroy_png_struct(png_ptr); + } + } } /* Allow the application to select one or more row filters to use. */ void PNGAPI -png_set_filter(png_structp png_ptr, int method, int filters) +png_set_filter(png_structrp png_ptr, int method, int filters) { png_debug(1, "in png_set_filter"); @@ -1017,7 +994,7 @@ png_set_filter(png_structp png_ptr, int method, int filters) return; #ifdef PNG_MNG_FEATURES_SUPPORTED - if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && + if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 && (method == PNG_INTRAPIXEL_DIFFERENCING)) method = PNG_FILTER_TYPE_BASE; @@ -1029,9 +1006,9 @@ png_set_filter(png_structp png_ptr, int method, int filters) #ifdef PNG_WRITE_FILTER_SUPPORTED case 5: case 6: - case 7: png_warning(png_ptr, "Unknown row filter for method 0"); - /* FALL THROUGH */ -#endif /* PNG_WRITE_FILTER_SUPPORTED */ + case 7: png_app_error(png_ptr, "Unknown row filter for method 0"); + /* FALL THROUGH */ +#endif /* WRITE_FILTER */ case PNG_FILTER_VALUE_NONE: png_ptr->do_filter = PNG_FILTER_NONE; break; @@ -1052,102 +1029,93 @@ png_set_filter(png_structp png_ptr, int method, int filters) png_ptr->do_filter = (png_byte)filters; break; #else default: - png_warning(png_ptr, "Unknown row filter for method 0"); -#endif /* PNG_WRITE_FILTER_SUPPORTED */ + png_app_error(png_ptr, "Unknown row filter for method 0"); +#endif /* WRITE_FILTER */ } +#ifdef PNG_WRITE_FILTER_SUPPORTED /* If we have allocated the row_buf, this means we have already started * with the image and we should have allocated all of the filter buffers * that have been selected. If prev_row isn't already allocated, then * it is too late to start using the filters that need it, since we * will be missing the data in the previous row. If an application * wants to start and stop using particular filters during compression, - * it should start out with all of the filters, and then add and - * remove them after the start of compression. + * it should start out with all of the filters, and then remove them + * or add them back after the start of compression. + * + * NOTE: this is a nasty constraint on the code, because it means that the + * prev_row buffer must be maintained even if there are currently no + * 'prev_row' requiring filters active. */ if (png_ptr->row_buf != NULL) { - png_ptr->do_filter = PNG_FILTER_NONE; -#ifdef PNG_WRITE_FILTER_SUPPORTED - if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL) + int num_filters; + png_alloc_size_t buf_size; + + /* Repeat the checks in png_write_start_row; 1 pixel high or wide + * images cannot benefit from certain filters. If this isn't done here + * the check below will fire on 1 pixel high images. + */ + if (png_ptr->height == 1) + filters &= ~(PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH); + + if (png_ptr->width == 1) + filters &= ~(PNG_FILTER_SUB|PNG_FILTER_AVG|PNG_FILTER_PAETH); + + if ((filters & (PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH)) != 0 + && png_ptr->prev_row == NULL) { - png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; + /* This is the error case, however it is benign - the previous row + * is not available so the filter can't be used. Just warn here. + */ + png_app_warning(png_ptr, + "png_set_filter: UP/AVG/PAETH cannot be added after start"); + filters &= ~(PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH); } - if ((png_ptr->do_filter & PNG_FILTER_UP) && png_ptr->up_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Up filter after starting"); - png_ptr->do_filter = (png_byte)(png_ptr->do_filter & - ~PNG_FILTER_UP); - } + num_filters = 0; - else - { - png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; - } - } + if (filters & PNG_FILTER_SUB) + num_filters++; - if ((png_ptr->do_filter & PNG_FILTER_AVG) && png_ptr->avg_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Average filter after starting"); - png_ptr->do_filter = (png_byte)(png_ptr->do_filter & - ~PNG_FILTER_AVG); - } + if (filters & PNG_FILTER_UP) + num_filters++; - else - { - png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; - } - } + if (filters & PNG_FILTER_AVG) + num_filters++; - if ((png_ptr->do_filter & PNG_FILTER_PAETH) && - png_ptr->paeth_row == NULL) - { - if (png_ptr->prev_row == NULL) - { - png_warning(png_ptr, "Can't add Paeth filter after starting"); - png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH); - } + if (filters & PNG_FILTER_PAETH) + num_filters++; - else - { - png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - (png_ptr->rowbytes + 1)); - png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; - } - } + /* Allocate needed row buffers if they have not already been + * allocated. + */ + buf_size = PNG_ROWBYTES(png_ptr->usr_channels * png_ptr->usr_bit_depth, + png_ptr->width) + 1; + + if (png_ptr->try_row == NULL) + png_ptr->try_row = png_voidcast(png_bytep, + png_malloc(png_ptr, buf_size)); - if (png_ptr->do_filter == PNG_NO_FILTERS) - png_ptr->do_filter = PNG_FILTER_NONE; -#endif /* PNG_WRITE_FILTER_SUPPORTED */ + if (num_filters > 1) + { + if (png_ptr->tst_row == NULL) + png_ptr->tst_row = png_voidcast(png_bytep, + png_malloc(png_ptr, buf_size)); + } } + png_ptr->do_filter = (png_byte)filters; +#endif } else png_error(png_ptr, "Unknown custom filter method"); } -/* This allows us to influence the way in which libpng chooses the "best" - * filter for the current scanline. While the "minimum-sum-of-absolute- - * differences metric is relatively fast and effective, there is some - * question as to whether it can be improved upon by trying to keep the - * filtered data going to zlib more consistent, hopefully resulting in - * better compression. - */ #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */ /* Provide floating and fixed point APIs */ #ifdef PNG_FLOATING_POINT_SUPPORTED void PNGAPI -png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, +png_set_filter_heuristics(png_structrp png_ptr, int heuristic_method, int num_weights, png_const_doublep filter_weights, png_const_doublep filter_costs) { @@ -1161,7 +1129,7 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, #ifdef PNG_FIXED_POINT_SUPPORTED void PNGAPI -png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method, +png_set_filter_heuristics_fixed(png_structrp png_ptr, int heuristic_method, int num_weights, png_const_fixed_point_p filter_weights, png_const_fixed_point_p filter_costs) { @@ -1176,37 +1144,37 @@ png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method, #ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED void PNGAPI -png_set_compression_level(png_structp png_ptr, int level) +png_set_compression_level(png_structrp png_ptr, int level) { png_debug(1, "in png_set_compression_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL; png_ptr->zlib_level = level; } void PNGAPI -png_set_compression_mem_level(png_structp png_ptr, int mem_level) +png_set_compression_mem_level(png_structrp png_ptr, int mem_level) { png_debug(1, "in png_set_compression_mem_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL; png_ptr->zlib_mem_level = mem_level; } void PNGAPI -png_set_compression_strategy(png_structp png_ptr, int strategy) +png_set_compression_strategy(png_structrp png_ptr, int strategy) { png_debug(1, "in png_set_compression_strategy"); if (png_ptr == NULL) return; + /* The flag setting here prevents the libpng dynamic selection of strategy. + */ png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY; png_ptr->zlib_strategy = strategy; } @@ -1215,42 +1183,46 @@ png_set_compression_strategy(png_structp png_ptr, int strategy) * smaller value of window_bits if it can do so safely. */ void PNGAPI -png_set_compression_window_bits(png_structp png_ptr, int window_bits) +png_set_compression_window_bits(png_structrp png_ptr, int window_bits) { if (png_ptr == NULL) return; + /* Prior to 1.6.0 this would warn but then set the window_bits value. This + * meant that negative window bits values could be selected that would cause + * libpng to write a non-standard PNG file with raw deflate or gzip + * compressed IDAT or ancillary chunks. Such files can be read and there is + * no warning on read, so this seems like a very bad idea. + */ if (window_bits > 15) + { png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); + window_bits = 15; + } else if (window_bits < 8) + { png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); + window_bits = 8; + } -#ifndef WBITS_8_OK - /* Avoid libpng bug with 256-byte windows */ - if (window_bits == 8) - { - png_warning(png_ptr, "Compression window is being reset to 512"); - window_bits = 9; - } - -#endif - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS; png_ptr->zlib_window_bits = window_bits; } void PNGAPI -png_set_compression_method(png_structp png_ptr, int method) +png_set_compression_method(png_structrp png_ptr, int method) { png_debug(1, "in png_set_compression_method"); if (png_ptr == NULL) return; + /* This would produce an invalid PNG file if it worked, but it doesn't and + * deflate will fault it, so it is harmless to just warn here. + */ if (method != 8) png_warning(png_ptr, "Only compression method 8 is supported by PNG"); - png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD; png_ptr->zlib_method = method; } #endif /* WRITE_CUSTOMIZE_COMPRESSION */ @@ -1258,38 +1230,35 @@ png_set_compression_method(png_structp png_ptr, int method) /* The following were added to libpng-1.5.4 */ #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED void PNGAPI -png_set_text_compression_level(png_structp png_ptr, int level) +png_set_text_compression_level(png_structrp png_ptr, int level) { png_debug(1, "in png_set_text_compression_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_LEVEL; png_ptr->zlib_text_level = level; } void PNGAPI -png_set_text_compression_mem_level(png_structp png_ptr, int mem_level) +png_set_text_compression_mem_level(png_structrp png_ptr, int mem_level) { png_debug(1, "in png_set_text_compression_mem_level"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL; png_ptr->zlib_text_mem_level = mem_level; } void PNGAPI -png_set_text_compression_strategy(png_structp png_ptr, int strategy) +png_set_text_compression_strategy(png_structrp png_ptr, int strategy) { png_debug(1, "in png_set_text_compression_strategy"); if (png_ptr == NULL) return; - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_STRATEGY; png_ptr->zlib_text_strategy = strategy; } @@ -1297,32 +1266,28 @@ png_set_text_compression_strategy(png_structp png_ptr, int strategy) * smaller value of window_bits if it can do so safely. */ void PNGAPI -png_set_text_compression_window_bits(png_structp png_ptr, int window_bits) +png_set_text_compression_window_bits(png_structrp png_ptr, int window_bits) { if (png_ptr == NULL) return; if (window_bits > 15) + { png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); + window_bits = 15; + } else if (window_bits < 8) - png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); - -#ifndef WBITS_8_OK - /* Avoid libpng bug with 256-byte windows */ - if (window_bits == 8) { - png_warning(png_ptr, "Text compression window is being reset to 512"); - window_bits = 9; + png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); + window_bits = 8; } -#endif - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS; png_ptr->zlib_text_window_bits = window_bits; } void PNGAPI -png_set_text_compression_method(png_structp png_ptr, int method) +png_set_text_compression_method(png_structrp png_ptr, int method) { png_debug(1, "in png_set_text_compression_method"); @@ -1332,14 +1297,13 @@ png_set_text_compression_method(png_structp png_ptr, int method) if (method != 8) png_warning(png_ptr, "Only compression method 8 is supported by PNG"); - png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_METHOD; png_ptr->zlib_text_method = method; } -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ +#endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */ /* end of API added to libpng-1.5.4 */ void PNGAPI -png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn) +png_set_write_status_fn(png_structrp png_ptr, png_write_status_ptr write_row_fn) { if (png_ptr == NULL) return; @@ -1349,7 +1313,7 @@ png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn) #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED void PNGAPI -png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr +png_set_write_user_transform_fn(png_structrp png_ptr, png_user_transform_ptr write_user_transform_fn) { png_debug(1, "in png_set_write_user_transform_fn"); @@ -1365,88 +1329,1055 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr #ifdef PNG_INFO_IMAGE_SUPPORTED void PNGAPI -png_write_png(png_structp png_ptr, png_infop info_ptr, +png_write_png(png_structrp png_ptr, png_inforp info_ptr, int transforms, voidp params) { if (png_ptr == NULL || info_ptr == NULL) return; + if ((info_ptr->valid & PNG_INFO_IDAT) == 0) + { + png_app_error(png_ptr, "no rows for png_write_image to write"); + return; + } + /* Write the file header information. */ png_write_info(png_ptr, info_ptr); /* ------ these transformations don't touch the info structure ------- */ -#ifdef PNG_WRITE_INVERT_SUPPORTED /* Invert monochrome pixels */ - if (transforms & PNG_TRANSFORM_INVERT_MONO) + if ((transforms & PNG_TRANSFORM_INVERT_MONO) != 0) +#ifdef PNG_WRITE_INVERT_SUPPORTED png_set_invert_mono(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_INVERT_MONO not supported"); #endif -#ifdef PNG_WRITE_SHIFT_SUPPORTED /* Shift the pixels up to a legal bit depth and fill in * as appropriate to correctly scale the image. */ - if ((transforms & PNG_TRANSFORM_SHIFT) - && (info_ptr->valid & PNG_INFO_sBIT)) - png_set_shift(png_ptr, &info_ptr->sig_bit); + if ((transforms & PNG_TRANSFORM_SHIFT) != 0) +#ifdef PNG_WRITE_SHIFT_SUPPORTED + if ((info_ptr->valid & PNG_INFO_sBIT) != 0) + png_set_shift(png_ptr, &info_ptr->sig_bit); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_SHIFT not supported"); #endif -#ifdef PNG_WRITE_PACK_SUPPORTED /* Pack pixels into bytes */ - if (transforms & PNG_TRANSFORM_PACKING) - png_set_packing(png_ptr); + if ((transforms & PNG_TRANSFORM_PACKING) != 0) +#ifdef PNG_WRITE_PACK_SUPPORTED + png_set_packing(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_PACKING not supported"); #endif -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED /* Swap location of alpha bytes from ARGB to RGBA */ - if (transforms & PNG_TRANSFORM_SWAP_ALPHA) + if ((transforms & PNG_TRANSFORM_SWAP_ALPHA) != 0) +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED png_set_swap_alpha(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_SWAP_ALPHA not supported"); #endif + /* Remove a filler (X) from XRGB/RGBX/AG/GA into to convert it into + * RGB, note that the code expects the input color type to be G or RGB; no + * alpha channel. + */ + if ((transforms & (PNG_TRANSFORM_STRIP_FILLER_AFTER| + PNG_TRANSFORM_STRIP_FILLER_BEFORE)) != 0) + { #ifdef PNG_WRITE_FILLER_SUPPORTED - /* Pack XRGB/RGBX/ARGB/RGBA into RGB (4 channels -> 3 channels) */ - if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER) - png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); + if ((transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER) != 0) + { + if ((transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE) != 0) + png_app_error(png_ptr, + "PNG_TRANSFORM_STRIP_FILLER: BEFORE+AFTER not supported"); - else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE) - png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); + /* Continue if ignored - this is the pre-1.6.10 behavior */ + png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); + } + + else if ((transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE) != 0) + png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_STRIP_FILLER not supported"); #endif + } -#ifdef PNG_WRITE_BGR_SUPPORTED /* Flip BGR pixels to RGB */ - if (transforms & PNG_TRANSFORM_BGR) + if ((transforms & PNG_TRANSFORM_BGR) != 0) +#ifdef PNG_WRITE_BGR_SUPPORTED png_set_bgr(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_BGR not supported"); #endif -#ifdef PNG_WRITE_SWAP_SUPPORTED /* Swap bytes of 16-bit files to most significant byte first */ - if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) + if ((transforms & PNG_TRANSFORM_SWAP_ENDIAN) != 0) +#ifdef PNG_WRITE_SWAP_SUPPORTED png_set_swap(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_SWAP_ENDIAN not supported"); #endif + /* Swap bits of 1-bit, 2-bit, 4-bit packed pixel formats */ + if ((transforms & PNG_TRANSFORM_PACKSWAP) != 0) #ifdef PNG_WRITE_PACKSWAP_SUPPORTED - /* Swap bits of 1, 2, 4 bit packed pixel formats */ - if (transforms & PNG_TRANSFORM_PACKSWAP) png_set_packswap(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_PACKSWAP not supported"); #endif -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED /* Invert the alpha channel from opacity to transparency */ - if (transforms & PNG_TRANSFORM_INVERT_ALPHA) + if ((transforms & PNG_TRANSFORM_INVERT_ALPHA) != 0) +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED png_set_invert_alpha(png_ptr); +#else + png_app_error(png_ptr, "PNG_TRANSFORM_INVERT_ALPHA not supported"); #endif /* ----------------------- end of transformations ------------------- */ /* Write the bits */ - if (info_ptr->valid & PNG_INFO_IDAT) - png_write_image(png_ptr, info_ptr->row_pointers); + png_write_image(png_ptr, info_ptr->row_pointers); /* It is REQUIRED to call this to finish writing the rest of the file */ png_write_end(png_ptr, info_ptr); - PNG_UNUSED(transforms) /* Quiet compiler warnings */ PNG_UNUSED(params) } #endif -#endif /* PNG_WRITE_SUPPORTED */ + + +#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED +/* Initialize the write structure - general purpose utility. */ +static int +png_image_write_init(png_imagep image) +{ + png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, image, + png_safe_error, png_safe_warning); + + if (png_ptr != NULL) + { + png_infop info_ptr = png_create_info_struct(png_ptr); + + if (info_ptr != NULL) + { + png_controlp control = png_voidcast(png_controlp, + png_malloc_warn(png_ptr, (sizeof *control))); + + if (control != NULL) + { + memset(control, 0, (sizeof *control)); + + control->png_ptr = png_ptr; + control->info_ptr = info_ptr; + control->for_write = 1; + + image->opaque = control; + return 1; + } + + /* Error clean up */ + png_destroy_info_struct(png_ptr, &info_ptr); + } + + png_destroy_write_struct(&png_ptr, NULL); + } + + return png_image_error(image, "png_image_write_: out of memory"); +} + +/* Arguments to png_image_write_main: */ +typedef struct +{ + /* Arguments: */ + png_imagep image; + png_const_voidp buffer; + png_int_32 row_stride; + png_const_voidp colormap; + int convert_to_8bit; + /* Local variables: */ + png_const_voidp first_row; + ptrdiff_t row_bytes; + png_voidp local_row; + /* Byte count for memory writing */ + png_bytep memory; + png_alloc_size_t memory_bytes; /* not used for STDIO */ + png_alloc_size_t output_bytes; /* running total */ +} png_image_write_control; + +/* Write png_uint_16 input to a 16-bit PNG; the png_ptr has already been set to + * do any necessary byte swapping. The component order is defined by the + * png_image format value. + */ +static int +png_write_image_16bit(png_voidp argument) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + + png_const_uint_16p input_row = png_voidcast(png_const_uint_16p, + display->first_row); + png_uint_16p output_row = png_voidcast(png_uint_16p, display->local_row); + png_uint_16p row_end; + const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; + int aindex = 0; + png_uint_32 y = image->height; + + if ((image->format & PNG_FORMAT_FLAG_ALPHA) != 0) + { +# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED + if ((image->format & PNG_FORMAT_FLAG_AFIRST) != 0) + { + aindex = -1; + ++input_row; /* To point to the first component */ + ++output_row; + } + else + aindex = channels; +# else + aindex = channels; +# endif + } + + else + png_error(png_ptr, "png_write_image: internal call error"); + + /* Work out the output row end and count over this, note that the increment + * above to 'row' means that row_end can actually be beyond the end of the + * row; this is correct. + */ + row_end = output_row + image->width * (channels+1); + + while (y-- > 0) + { + png_const_uint_16p in_ptr = input_row; + png_uint_16p out_ptr = output_row; + + while (out_ptr < row_end) + { + const png_uint_16 alpha = in_ptr[aindex]; + png_uint_32 reciprocal = 0; + int c; + + out_ptr[aindex] = alpha; + + /* Calculate a reciprocal. The correct calculation is simply + * component/alpha*65535 << 15. (I.e. 15 bits of precision); this + * allows correct rounding by adding .5 before the shift. 'reciprocal' + * is only initialized when required. + */ + if (alpha > 0 && alpha < 65535) + reciprocal = ((0xffff<<15)+(alpha>>1))/alpha; + + c = channels; + do /* always at least one channel */ + { + png_uint_16 component = *in_ptr++; + + /* The following gives 65535 for an alpha of 0, which is fine, + * otherwise if 0/0 is represented as some other value there is more + * likely to be a discontinuity which will probably damage + * compression when moving from a fully transparent area to a + * nearly transparent one. (The assumption here is that opaque + * areas tend not to be 0 intensity.) + */ + if (component >= alpha) + component = 65535; + + /* component<alpha, so component/alpha is less than one and + * component*reciprocal is less than 2^31. + */ + else if (component > 0 && alpha < 65535) + { + png_uint_32 calc = component * reciprocal; + calc += 16384; /* round to nearest */ + component = (png_uint_16)(calc >> 15); + } + + *out_ptr++ = component; + } + while (--c > 0); + + /* Skip to next component (skip the intervening alpha channel) */ + ++in_ptr; + ++out_ptr; + } + + png_write_row(png_ptr, png_voidcast(png_const_bytep, display->local_row)); + input_row += display->row_bytes/(sizeof (png_uint_16)); + } + + return 1; +} + +/* Given 16-bit input (1 to 4 channels) write 8-bit output. If an alpha channel + * is present it must be removed from the components, the components are then + * written in sRGB encoding. No components are added or removed. + * + * Calculate an alpha reciprocal to reverse pre-multiplication. As above the + * calculation can be done to 15 bits of accuracy; however, the output needs to + * be scaled in the range 0..255*65535, so include that scaling here. + */ +# define UNP_RECIPROCAL(alpha) ((((0xffff*0xff)<<7)+(alpha>>1))/alpha) + +static png_byte +png_unpremultiply(png_uint_32 component, png_uint_32 alpha, + png_uint_32 reciprocal/*from the above macro*/) +{ + /* The following gives 1.0 for an alpha of 0, which is fine, otherwise if 0/0 + * is represented as some other value there is more likely to be a + * discontinuity which will probably damage compression when moving from a + * fully transparent area to a nearly transparent one. (The assumption here + * is that opaque areas tend not to be 0 intensity.) + * + * There is a rounding problem here; if alpha is less than 128 it will end up + * as 0 when scaled to 8 bits. To avoid introducing spurious colors into the + * output change for this too. + */ + if (component >= alpha || alpha < 128) + return 255; + + /* component<alpha, so component/alpha is less than one and + * component*reciprocal is less than 2^31. + */ + else if (component > 0) + { + /* The test is that alpha/257 (rounded) is less than 255, the first value + * that becomes 255 is 65407. + * NOTE: this must agree with the PNG_DIV257 macro (which must, therefore, + * be exact!) [Could also test reciprocal != 0] + */ + if (alpha < 65407) + { + component *= reciprocal; + component += 64; /* round to nearest */ + component >>= 7; + } + + else + component *= 255; + + /* Convert the component to sRGB. */ + return (png_byte)PNG_sRGB_FROM_LINEAR(component); + } + + else + return 0; +} + +static int +png_write_image_8bit(png_voidp argument) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + + png_const_uint_16p input_row = png_voidcast(png_const_uint_16p, + display->first_row); + png_bytep output_row = png_voidcast(png_bytep, display->local_row); + png_uint_32 y = image->height; + const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; + + if ((image->format & PNG_FORMAT_FLAG_ALPHA) != 0) + { + png_bytep row_end; + int aindex; + +# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED + if ((image->format & PNG_FORMAT_FLAG_AFIRST) != 0) + { + aindex = -1; + ++input_row; /* To point to the first component */ + ++output_row; + } + + else +# endif + aindex = channels; + + /* Use row_end in place of a loop counter: */ + row_end = output_row + image->width * (channels+1); + + while (y-- > 0) + { + png_const_uint_16p in_ptr = input_row; + png_bytep out_ptr = output_row; + + while (out_ptr < row_end) + { + png_uint_16 alpha = in_ptr[aindex]; + png_byte alphabyte = (png_byte)PNG_DIV257(alpha); + png_uint_32 reciprocal = 0; + int c; + + /* Scale and write the alpha channel. */ + out_ptr[aindex] = alphabyte; + + if (alphabyte > 0 && alphabyte < 255) + reciprocal = UNP_RECIPROCAL(alpha); + + c = channels; + do /* always at least one channel */ + *out_ptr++ = png_unpremultiply(*in_ptr++, alpha, reciprocal); + while (--c > 0); + + /* Skip to next component (skip the intervening alpha channel) */ + ++in_ptr; + ++out_ptr; + } /* while out_ptr < row_end */ + + png_write_row(png_ptr, png_voidcast(png_const_bytep, + display->local_row)); + input_row += display->row_bytes/(sizeof (png_uint_16)); + } /* while y */ + } + + else + { + /* No alpha channel, so the row_end really is the end of the row and it + * is sufficient to loop over the components one by one. + */ + png_bytep row_end = output_row + image->width * channels; + + while (y-- > 0) + { + png_const_uint_16p in_ptr = input_row; + png_bytep out_ptr = output_row; + + while (out_ptr < row_end) + { + png_uint_32 component = *in_ptr++; + + component *= 255; + *out_ptr++ = (png_byte)PNG_sRGB_FROM_LINEAR(component); + } + + png_write_row(png_ptr, output_row); + input_row += display->row_bytes/(sizeof (png_uint_16)); + } + } + + return 1; +} + +static void +png_image_set_PLTE(png_image_write_control *display) +{ + const png_imagep image = display->image; + const void *cmap = display->colormap; + const int entries = image->colormap_entries > 256 ? 256 : + (int)image->colormap_entries; + + /* NOTE: the caller must check for cmap != NULL and entries != 0 */ + const png_uint_32 format = image->format; + const int channels = PNG_IMAGE_SAMPLE_CHANNELS(format); + +# if defined(PNG_FORMAT_BGR_SUPPORTED) &&\ + defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED) + const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 && + (format & PNG_FORMAT_FLAG_ALPHA) != 0; +# else +# define afirst 0 +# endif + +# ifdef PNG_FORMAT_BGR_SUPPORTED + const int bgr = (format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0; +# else +# define bgr 0 +# endif + + int i, num_trans; + png_color palette[256]; + png_byte tRNS[256]; + + memset(tRNS, 255, (sizeof tRNS)); + memset(palette, 0, (sizeof palette)); + + for (i=num_trans=0; i<entries; ++i) + { + /* This gets automatically converted to sRGB with reversal of the + * pre-multiplication if the color-map has an alpha channel. + */ + if ((format & PNG_FORMAT_FLAG_LINEAR) != 0) + { + png_const_uint_16p entry = png_voidcast(png_const_uint_16p, cmap); + + entry += i * channels; + + if ((channels & 1) != 0) /* no alpha */ + { + if (channels >= 3) /* RGB */ + { + palette[i].blue = (png_byte)PNG_sRGB_FROM_LINEAR(255 * + entry[(2 ^ bgr)]); + palette[i].green = (png_byte)PNG_sRGB_FROM_LINEAR(255 * + entry[1]); + palette[i].red = (png_byte)PNG_sRGB_FROM_LINEAR(255 * + entry[bgr]); + } + + else /* Gray */ + palette[i].blue = palette[i].red = palette[i].green = + (png_byte)PNG_sRGB_FROM_LINEAR(255 * *entry); + } + + else /* alpha */ + { + png_uint_16 alpha = entry[afirst ? 0 : channels-1]; + png_byte alphabyte = (png_byte)PNG_DIV257(alpha); + png_uint_32 reciprocal = 0; + + /* Calculate a reciprocal, as in the png_write_image_8bit code above + * this is designed to produce a value scaled to 255*65535 when + * divided by 128 (i.e. asr 7). + */ + if (alphabyte > 0 && alphabyte < 255) + reciprocal = (((0xffff*0xff)<<7)+(alpha>>1))/alpha; + + tRNS[i] = alphabyte; + if (alphabyte < 255) + num_trans = i+1; + + if (channels >= 3) /* RGB */ + { + palette[i].blue = png_unpremultiply(entry[afirst + (2 ^ bgr)], + alpha, reciprocal); + palette[i].green = png_unpremultiply(entry[afirst + 1], alpha, + reciprocal); + palette[i].red = png_unpremultiply(entry[afirst + bgr], alpha, + reciprocal); + } + + else /* gray */ + palette[i].blue = palette[i].red = palette[i].green = + png_unpremultiply(entry[afirst], alpha, reciprocal); + } + } + + else /* Color-map has sRGB values */ + { + png_const_bytep entry = png_voidcast(png_const_bytep, cmap); + + entry += i * channels; + + switch (channels) + { + case 4: + tRNS[i] = entry[afirst ? 0 : 3]; + if (tRNS[i] < 255) + num_trans = i+1; + /* FALL THROUGH */ + case 3: + palette[i].blue = entry[afirst + (2 ^ bgr)]; + palette[i].green = entry[afirst + 1]; + palette[i].red = entry[afirst + bgr]; + break; + + case 2: + tRNS[i] = entry[1 ^ afirst]; + if (tRNS[i] < 255) + num_trans = i+1; + /* FALL THROUGH */ + case 1: + palette[i].blue = palette[i].red = palette[i].green = + entry[afirst]; + break; + + default: + break; + } + } + } + +# ifdef afirst +# undef afirst +# endif +# ifdef bgr +# undef bgr +# endif + + png_set_PLTE(image->opaque->png_ptr, image->opaque->info_ptr, palette, + entries); + + if (num_trans > 0) + png_set_tRNS(image->opaque->png_ptr, image->opaque->info_ptr, tRNS, + num_trans, NULL); + + image->colormap_entries = entries; +} + +static int +png_image_write_main(png_voidp argument) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + argument); + png_imagep image = display->image; + png_structrp png_ptr = image->opaque->png_ptr; + png_inforp info_ptr = image->opaque->info_ptr; + png_uint_32 format = image->format; + + /* The following four ints are actually booleans */ + int colormap = (format & PNG_FORMAT_FLAG_COLORMAP); + int linear = !colormap && (format & PNG_FORMAT_FLAG_LINEAR); /* input */ + int alpha = !colormap && (format & PNG_FORMAT_FLAG_ALPHA); + int write_16bit = linear && !colormap && (display->convert_to_8bit == 0); + +# ifdef PNG_BENIGN_ERRORS_SUPPORTED + /* Make sure we error out on any bad situation */ + png_set_benign_errors(png_ptr, 0/*error*/); +# endif + + /* Default the 'row_stride' parameter if required, also check the row stride + * and total image size to ensure that they are within the system limits. + */ + { + const unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format); + + if (image->width <= 0x7FFFFFFFU/channels) /* no overflow */ + { + png_uint_32 check; + const png_uint_32 png_row_stride = image->width * channels; + + if (display->row_stride == 0) + display->row_stride = (png_int_32)/*SAFE*/png_row_stride; + + if (display->row_stride < 0) + check = -display->row_stride; + + else + check = display->row_stride; + + if (check >= png_row_stride) + { + /* Now check for overflow of the image buffer calculation; this + * limits the whole image size to 32 bits for API compatibility with + * the current, 32-bit, PNG_IMAGE_BUFFER_SIZE macro. + */ + if (image->height > 0xFFFFFFFF/png_row_stride) + png_error(image->opaque->png_ptr, "memory image too large"); + } + + else + png_error(image->opaque->png_ptr, "supplied row stride too small"); + } + + else + png_error(image->opaque->png_ptr, "image row stride too large"); + } + + /* Set the required transforms then write the rows in the correct order. */ + if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0) + { + if (display->colormap != NULL && image->colormap_entries > 0) + { + png_uint_32 entries = image->colormap_entries; + + png_set_IHDR(png_ptr, info_ptr, image->width, image->height, + entries > 16 ? 8 : (entries > 4 ? 4 : (entries > 2 ? 2 : 1)), + PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + png_image_set_PLTE(display); + } + + else + png_error(image->opaque->png_ptr, + "no color-map for color-mapped image"); + } + + else + png_set_IHDR(png_ptr, info_ptr, image->width, image->height, + write_16bit ? 16 : 8, + ((format & PNG_FORMAT_FLAG_COLOR) ? PNG_COLOR_MASK_COLOR : 0) + + ((format & PNG_FORMAT_FLAG_ALPHA) ? PNG_COLOR_MASK_ALPHA : 0), + PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + /* Counter-intuitively the data transformations must be called *after* + * png_write_info, not before as in the read code, but the 'set' functions + * must still be called before. Just set the color space information, never + * write an interlaced image. + */ + + if (write_16bit != 0) + { + /* The gamma here is 1.0 (linear) and the cHRM chunk matches sRGB. */ + png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_LINEAR); + + if ((image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB) == 0) + png_set_cHRM_fixed(png_ptr, info_ptr, + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); + } + + else if ((image->flags & PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB) == 0) + png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_PERCEPTUAL); + + /* Else writing an 8-bit file and the *colors* aren't sRGB, but the 8-bit + * space must still be gamma encoded. + */ + else + png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); + + /* Write the file header. */ + png_write_info(png_ptr, info_ptr); + + /* Now set up the data transformations (*after* the header is written), + * remove the handled transformations from the 'format' flags for checking. + * + * First check for a little endian system if writing 16-bit files. + */ + if (write_16bit != 0) + { + PNG_CONST png_uint_16 le = 0x0001; + + if ((*(png_const_bytep) & le) != 0) + png_set_swap(png_ptr); + } + +# ifdef PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED + if ((format & PNG_FORMAT_FLAG_BGR) != 0) + { + if (colormap == 0 && (format & PNG_FORMAT_FLAG_COLOR) != 0) + png_set_bgr(png_ptr); + format &= ~PNG_FORMAT_FLAG_BGR; + } +# endif + +# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED + if ((format & PNG_FORMAT_FLAG_AFIRST) != 0) + { + if (colormap == 0 && (format & PNG_FORMAT_FLAG_ALPHA) != 0) + png_set_swap_alpha(png_ptr); + format &= ~PNG_FORMAT_FLAG_AFIRST; + } +# endif + + /* If there are 16 or fewer color-map entries we wrote a lower bit depth + * above, but the application data is still byte packed. + */ + if (colormap != 0 && image->colormap_entries <= 16) + png_set_packing(png_ptr); + + /* That should have handled all (both) the transforms. */ + if ((format & ~(png_uint_32)(PNG_FORMAT_FLAG_COLOR | PNG_FORMAT_FLAG_LINEAR | + PNG_FORMAT_FLAG_ALPHA | PNG_FORMAT_FLAG_COLORMAP)) != 0) + png_error(png_ptr, "png_write_image: unsupported transformation"); + + { + png_const_bytep row = png_voidcast(png_const_bytep, display->buffer); + ptrdiff_t row_bytes = display->row_stride; + + if (linear != 0) + row_bytes *= (sizeof (png_uint_16)); + + if (row_bytes < 0) + row += (image->height-1) * (-row_bytes); + + display->first_row = row; + display->row_bytes = row_bytes; + } + + /* Apply 'fast' options if the flag is set. */ + if ((image->flags & PNG_IMAGE_FLAG_FAST) != 0) + { + png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_NO_FILTERS); + /* NOTE: determined by experiment using pngstest, this reflects some + * balance between the time to write the image once and the time to read + * it about 50 times. The speed-up in pngstest was about 10-20% of the + * total (user) time on a heavily loaded system. + */ +# ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED + png_set_compression_level(png_ptr, 3); +# endif + } + + /* Check for the cases that currently require a pre-transform on the row + * before it is written. This only applies when the input is 16-bit and + * either there is an alpha channel or it is converted to 8-bit. + */ + if ((linear != 0 && alpha != 0 ) || + (colormap == 0 && display->convert_to_8bit != 0)) + { + png_bytep row = png_voidcast(png_bytep, png_malloc(png_ptr, + png_get_rowbytes(png_ptr, info_ptr))); + int result; + + display->local_row = row; + if (write_16bit != 0) + result = png_safe_execute(image, png_write_image_16bit, display); + else + result = png_safe_execute(image, png_write_image_8bit, display); + display->local_row = NULL; + + png_free(png_ptr, row); + + /* Skip the 'write_end' on error: */ + if (result == 0) + return 0; + } + + /* Otherwise this is the case where the input is in a format currently + * supported by the rest of the libpng write code; call it directly. + */ + else + { + png_const_bytep row = png_voidcast(png_const_bytep, display->first_row); + ptrdiff_t row_bytes = display->row_bytes; + png_uint_32 y = image->height; + + while (y-- > 0) + { + png_write_row(png_ptr, row); + row += row_bytes; + } + } + + png_write_end(png_ptr, info_ptr); + return 1; +} + + +static void (PNGCBAPI +image_memory_write)(png_structp png_ptr, png_bytep/*const*/ data, + png_size_t size) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + png_ptr->io_ptr/*backdoor: png_get_io_ptr(png_ptr)*/); + const png_alloc_size_t ob = display->output_bytes; + + /* Check for overflow; this should never happen: */ + if (size <= ((png_alloc_size_t)-1) - ob) + { + /* I don't think libpng ever does this, but just in case: */ + if (size > 0) + { + if (display->memory_bytes >= ob+size) /* writing */ + memcpy(display->memory+ob, data, size); + + /* Always update the size: */ + display->output_bytes = ob+size; + } + } + + else + png_error(png_ptr, "png_image_write_to_memory: PNG too big"); +} + +static void (PNGCBAPI +image_memory_flush)(png_structp png_ptr) +{ + PNG_UNUSED(png_ptr) +} + +static int +png_image_write_memory(png_voidp argument) +{ + png_image_write_control *display = png_voidcast(png_image_write_control*, + argument); + + /* The rest of the memory-specific init and write_main in an error protected + * environment. This case needs to use callbacks for the write operations + * since libpng has no built in support for writing to memory. + */ + png_set_write_fn(display->image->opaque->png_ptr, display/*io_ptr*/, + image_memory_write, image_memory_flush); + + return png_image_write_main(display); +} + +int PNGAPI +png_image_write_to_memory(png_imagep image, void *memory, + png_alloc_size_t * PNG_RESTRICT memory_bytes, int convert_to_8bit, + const void *buffer, png_int_32 row_stride, const void *colormap) +{ + /* Write the image to the given buffer, or count the bytes if it is NULL */ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (memory_bytes != NULL && buffer != NULL) + { + /* This is to give the caller an easier error detection in the NULL + * case and guard against uninitialized variable problems: + */ + if (memory == NULL) + *memory_bytes = 0; + + if (png_image_write_init(image) != 0) + { + png_image_write_control display; + int result; + + memset(&display, 0, (sizeof display)); + display.image = image; + display.buffer = buffer; + display.row_stride = row_stride; + display.colormap = colormap; + display.convert_to_8bit = convert_to_8bit; + display.memory = png_voidcast(png_bytep, memory); + display.memory_bytes = *memory_bytes; + display.output_bytes = 0; + + result = png_safe_execute(image, png_image_write_memory, &display); + png_image_free(image); + + /* write_memory returns true even if we ran out of buffer. */ + if (result) + { + /* On out-of-buffer this function returns '0' but still updates + * memory_bytes: + */ + if (memory != NULL && display.output_bytes > *memory_bytes) + result = 0; + + *memory_bytes = display.output_bytes; + } + + return result; + } + + else + return 0; + } + + else + return png_image_error(image, + "png_image_write_to_memory: invalid argument"); + } + + else if (image != NULL) + return png_image_error(image, + "png_image_write_to_memory: incorrect PNG_IMAGE_VERSION"); + + else + return 0; +} + +#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED +int PNGAPI +png_image_write_to_stdio(png_imagep image, FILE *file, int convert_to_8bit, + const void *buffer, png_int_32 row_stride, const void *colormap) +{ + /* Write the image to the given (FILE*). */ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (file != NULL && buffer != NULL) + { + if (png_image_write_init(image) != 0) + { + png_image_write_control display; + int result; + + /* This is slightly evil, but png_init_io doesn't do anything other + * than this and we haven't changed the standard IO functions so + * this saves a 'safe' function. + */ + image->opaque->png_ptr->io_ptr = file; + + memset(&display, 0, (sizeof display)); + display.image = image; + display.buffer = buffer; + display.row_stride = row_stride; + display.colormap = colormap; + display.convert_to_8bit = convert_to_8bit; + + result = png_safe_execute(image, png_image_write_main, &display); + png_image_free(image); + return result; + } + + else + return 0; + } + + else + return png_image_error(image, + "png_image_write_to_stdio: invalid argument"); + } + + else if (image != NULL) + return png_image_error(image, + "png_image_write_to_stdio: incorrect PNG_IMAGE_VERSION"); + + else + return 0; +} + +int PNGAPI +png_image_write_to_file(png_imagep image, const char *file_name, + int convert_to_8bit, const void *buffer, png_int_32 row_stride, + const void *colormap) +{ + /* Write the image to the named file. */ + if (image != NULL && image->version == PNG_IMAGE_VERSION) + { + if (file_name != NULL && buffer != NULL) + { + FILE *fp = fopen(file_name, "wb"); + + if (fp != NULL) + { + if (png_image_write_to_stdio(image, fp, convert_to_8bit, buffer, + row_stride, colormap) != 0) + { + int error; /* from fflush/fclose */ + + /* Make sure the file is flushed correctly. */ + if (fflush(fp) == 0 && ferror(fp) == 0) + { + if (fclose(fp) == 0) + return 1; + + error = errno; /* from fclose */ + } + + else + { + error = errno; /* from fflush or ferror */ + (void)fclose(fp); + } + + (void)remove(file_name); + /* The image has already been cleaned up; this is just used to + * set the error (because the original write succeeded). + */ + return png_image_error(image, strerror(error)); + } + + else + { + /* Clean up: just the opened file. */ + (void)fclose(fp); + (void)remove(file_name); + return 0; + } + } + + else + return png_image_error(image, strerror(errno)); + } + + else + return png_image_error(image, + "png_image_write_to_file: invalid argument"); + } + + else if (image != NULL) + return png_image_error(image, + "png_image_write_to_file: incorrect PNG_IMAGE_VERSION"); + + else + return 0; +} +#endif /* SIMPLIFIED_WRITE_STDIO */ +#endif /* SIMPLIFIED_WRITE */ +#endif /* WRITE */ diff --git a/drivers/png/pngwtran.c b/drivers/png/pngwtran.c index 24c436ffe4..038a2ef5dc 100644 --- a/drivers/png/pngwtran.c +++ b/drivers/png/pngwtran.c @@ -1,8 +1,8 @@ /* pngwtran.c - transforms the data in a row for PNG writers * - * Copyright (c) 1998-2002,2004,2006-2012 Glenn Randers-Pehrson - * Copyright (c) 1998-2012 Glenn Randers-Pehrson + * Last changed in libpng 1.6.18 [July 23, 2015] + * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -14,102 +14,14 @@ #include "pngpriv.h" #ifdef PNG_WRITE_SUPPORTED - #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED -/* Transform the data according to the user's wishes. The order of - * transformations is significant. - */ -void /* PRIVATE */ -png_do_write_transformations(png_structp png_ptr, png_row_infop row_info) -{ - png_debug(1, "in png_do_write_transformations"); - - if (png_ptr == NULL) - return; - -#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED - if (png_ptr->transformations & PNG_USER_TRANSFORM) - if (png_ptr->write_user_transform_fn != NULL) - (*(png_ptr->write_user_transform_fn)) /* User write transform - function */ - (png_ptr, /* png_ptr */ - row_info, /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_size_t rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ -#endif - -#ifdef PNG_WRITE_FILLER_SUPPORTED - if (png_ptr->transformations & PNG_FILLER) - { - if (png_ptr->color_type & (PNG_COLOR_MASK_ALPHA|PNG_COLOR_MASK_PALETTE)) - { - /* GA, RGBA or palette; in any of these cases libpng will not do the - * the correct thing (whatever that might be). - */ - png_warning(png_ptr, "incorrect png_set_filler call ignored"); - png_ptr->transformations &= ~PNG_FILLER; - } - - else - png_do_strip_channel(row_info, png_ptr->row_buf + 1, - !(png_ptr->flags & PNG_FLAG_FILLER_AFTER)); - } -#endif - -#ifdef PNG_WRITE_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_PACK_SUPPORTED - if (png_ptr->transformations & PNG_PACK) - png_do_pack(row_info, png_ptr->row_buf + 1, - (png_uint_32)png_ptr->bit_depth); -#endif - -#ifdef PNG_WRITE_SWAP_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_SHIFT_SUPPORTED - if (png_ptr->transformations & PNG_SHIFT) - png_do_shift(row_info, png_ptr->row_buf + 1, - &(png_ptr->shift)); -#endif - -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_BGR_SUPPORTED - if (png_ptr->transformations & PNG_BGR) - png_do_bgr(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_INVERT_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(row_info, png_ptr->row_buf + 1); -#endif -} #ifdef PNG_WRITE_PACK_SUPPORTED /* Pack pixels into bytes. Pass the true bit depth in bit_depth. The * row_info bit depth should be 8 (one pixel per byte). The channels * should be 1 (this only happens on grayscale and paletted images). */ -void /* PRIVATE */ +static void png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) { png_debug(1, "in png_do_pack"); @@ -159,7 +71,8 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) case 2: { png_bytep sp, dp; - int shift, v; + unsigned int shift; + int v; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -198,7 +111,8 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) case 4: { png_bytep sp, dp; - int shift, v; + unsigned int shift; + int v; png_uint_32 i; png_uint_32 row_width = row_info->width; @@ -254,7 +168,7 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) * would pass 3 as bit_depth, and this routine would translate the * data to 0 to 15. */ -void /* PRIVATE */ +static void png_do_shift(png_row_infop row_info, png_bytep row, png_const_color_8p bit_depth) { @@ -265,7 +179,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, int shift_start[4], shift_dec[4]; int channels = 0; - if (row_info->color_type & PNG_COLOR_MASK_COLOR) + if ((row_info->color_type & PNG_COLOR_MASK_COLOR) != 0) { shift_start[channels] = row_info->bit_depth - bit_depth->red; shift_dec[channels] = bit_depth->red; @@ -287,7 +201,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, channels++; } - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) + if ((row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0) { shift_start[channels] = row_info->bit_depth - bit_depth->alpha; shift_dec[channels] = bit_depth->alpha; @@ -299,7 +213,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, { png_bytep bp = row; png_size_t i; - png_byte mask; + unsigned int mask; png_size_t row_bytes = row_info->rowbytes; if (bit_depth->gray == 1 && row_info->bit_depth == 2) @@ -313,20 +227,22 @@ png_do_shift(png_row_infop row_info, png_bytep row, for (i = 0; i < row_bytes; i++, bp++) { - png_uint_16 v; int j; + unsigned int v, out; v = *bp; - *bp = 0; + out = 0; for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0]) { if (j > 0) - *bp |= (png_byte)((v << j) & 0xff); + out |= v << j; else - *bp |= (png_byte)((v >> (-j)) & mask); + out |= (v >> (-j)) & mask; } + + *bp = (png_byte)(out & 0xff); } } @@ -339,21 +255,23 @@ png_do_shift(png_row_infop row_info, png_bytep row, for (i = 0; i < istop; i++, bp++) { - png_uint_16 v; + const unsigned int c = i%channels; int j; - int c = (int)(i%channels); + unsigned int v, out; v = *bp; - *bp = 0; + out = 0; for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) { if (j > 0) - *bp |= (png_byte)((v << j) & 0xff); + out |= v << j; else - *bp |= (png_byte)((v >> (-j)) & 0xff); + out |= v >> (-j); } + + *bp = (png_byte)(out & 0xff); } } @@ -365,22 +283,22 @@ png_do_shift(png_row_infop row_info, png_bytep row, for (bp = row, i = 0; i < istop; i++) { - int c = (int)(i%channels); - png_uint_16 value, v; + const unsigned int c = i%channels; int j; + unsigned int value, v; - v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1)); + v = png_get_uint_16(bp); value = 0; for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c]) { if (j > 0) - value |= (png_uint_16)((v << j) & (png_uint_16)0xffff); + value |= v << j; else - value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff); + value |= v >> (-j); } - *bp++ = (png_byte)(value >> 8); + *bp++ = (png_byte)((value >> 8) & 0xff); *bp++ = (png_byte)(value & 0xff); } } @@ -389,7 +307,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, #endif #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_swap_alpha"); @@ -437,7 +355,7 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) *(dp++) = save[1]; } } -#endif /* PNG_WRITE_16BIT_SUPPORTED */ +#endif /* WRITE_16BIT */ } else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) @@ -476,14 +394,14 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) *(dp++) = save[1]; } } -#endif /* PNG_WRITE_16BIT_SUPPORTED */ +#endif /* WRITE_16BIT */ } } } #endif #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_invert_alpha"); @@ -506,7 +424,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) *(dp++) = *(sp++); */ sp+=3; dp = sp; - *(dp++) = (png_byte)(255 - *(sp++)); + *dp = (png_byte)(255 - *(sp++)); } } @@ -530,10 +448,10 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) */ sp+=6; dp = sp; *(dp++) = (png_byte)(255 - *(sp++)); - *(dp++) = (png_byte)(255 - *(sp++)); + *dp = (png_byte)(255 - *(sp++)); } } -#endif /* PNG_WRITE_16BIT_SUPPORTED */ +#endif /* WRITE_16BIT */ } else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) @@ -568,78 +486,91 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) */ sp+=2; dp = sp; *(dp++) = (png_byte)(255 - *(sp++)); - *(dp++) = (png_byte)(255 - *(sp++)); + *dp = (png_byte)(255 - *(sp++)); } } -#endif /* PNG_WRITE_16BIT_SUPPORTED */ +#endif /* WRITE_16BIT */ } } } #endif -#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */ -#ifdef PNG_MNG_FEATURES_SUPPORTED -/* Undoes intrapixel differencing */ +/* Transform the data according to the user's wishes. The order of + * transformations is significant. + */ void /* PRIVATE */ -png_do_write_intrapixel(png_row_infop row_info, png_bytep row) +png_do_write_transformations(png_structrp png_ptr, png_row_infop row_info) { - png_debug(1, "in png_do_write_intrapixel"); + png_debug(1, "in png_do_write_transformations"); - if ((row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - int bytes_per_pixel; - png_uint_32 row_width = row_info->width; - if (row_info->bit_depth == 8) - { - png_bytep rp; - png_uint_32 i; + if (png_ptr == NULL) + return; - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 3; +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED + if ((png_ptr->transformations & PNG_USER_TRANSFORM) != 0) + if (png_ptr->write_user_transform_fn != NULL) + (*(png_ptr->write_user_transform_fn)) /* User write transform + function */ + (png_ptr, /* png_ptr */ + row_info, /* row_info: */ + /* png_uint_32 width; width of row */ + /* png_size_t rowbytes; number of bytes in row */ + /* png_byte color_type; color type of pixels */ + /* png_byte bit_depth; bit depth of samples */ + /* png_byte channels; number of channels (1-4) */ + /* png_byte pixel_depth; bits per pixel (depth*channels) */ + png_ptr->row_buf + 1); /* start of pixel data for row */ +#endif - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 4; +#ifdef PNG_WRITE_FILLER_SUPPORTED + if ((png_ptr->transformations & PNG_FILLER) != 0) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + !(png_ptr->flags & PNG_FLAG_FILLER_AFTER)); +#endif - else - return; +#ifdef PNG_WRITE_PACKSWAP_SUPPORTED + if ((png_ptr->transformations & PNG_PACKSWAP) != 0) + png_do_packswap(row_info, png_ptr->row_buf + 1); +#endif - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - *(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff); - *(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff); - } - } +#ifdef PNG_WRITE_PACK_SUPPORTED + if ((png_ptr->transformations & PNG_PACK) != 0) + png_do_pack(row_info, png_ptr->row_buf + 1, + (png_uint_32)png_ptr->bit_depth); +#endif -#ifdef PNG_WRITE_16BIT_SUPPORTED - else if (row_info->bit_depth == 16) - { - png_bytep rp; - png_uint_32 i; +#ifdef PNG_WRITE_SWAP_SUPPORTED +# ifdef PNG_16BIT_SUPPORTED + if ((png_ptr->transformations & PNG_SWAP_BYTES) != 0) + png_do_swap(row_info, png_ptr->row_buf + 1); +# endif +#endif - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 6; +#ifdef PNG_WRITE_SHIFT_SUPPORTED + if ((png_ptr->transformations & PNG_SHIFT) != 0) + png_do_shift(row_info, png_ptr->row_buf + 1, + &(png_ptr->shift)); +#endif - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 8; +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_SWAP_ALPHA) != 0) + png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1); +#endif - else - return; +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0) + png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1); +#endif - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); - png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); - png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); - png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL); - png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL); - *(rp ) = (png_byte)((red >> 8) & 0xff); - *(rp + 1) = (png_byte)(red & 0xff); - *(rp + 4) = (png_byte)((blue >> 8) & 0xff); - *(rp + 5) = (png_byte)(blue & 0xff); - } - } -#endif /* PNG_WRITE_16BIT_SUPPORTED */ - } +#ifdef PNG_WRITE_BGR_SUPPORTED + if ((png_ptr->transformations & PNG_BGR) != 0) + png_do_bgr(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_WRITE_INVERT_SUPPORTED + if ((png_ptr->transformations & PNG_INVERT_MONO) != 0) + png_do_invert(row_info, png_ptr->row_buf + 1); +#endif } -#endif /* PNG_MNG_FEATURES_SUPPORTED */ -#endif /* PNG_WRITE_SUPPORTED */ +#endif /* WRITE_TRANSFORMS */ +#endif /* WRITE */ diff --git a/drivers/png/pngwutil.c b/drivers/png/pngwutil.c index d5f097fb97..b47f119d22 100644 --- a/drivers/png/pngwutil.c +++ b/drivers/png/pngwutil.c @@ -1,8 +1,8 @@ /* pngwutil.c - utilities to write a PNG file * - * Last changed in libpng 1.5.26 [December 17, 2015] - * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson + * Last changed in libpng 1.6.22 [May 26, 2016] + * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -23,30 +23,12 @@ void PNGAPI png_save_uint_32(png_bytep buf, png_uint_32 i) { - buf[0] = (png_byte)((i >> 24) & 0xff); - buf[1] = (png_byte)((i >> 16) & 0xff); - buf[2] = (png_byte)((i >> 8) & 0xff); - buf[3] = (png_byte)(i & 0xff); + buf[0] = (png_byte)((i >> 24) & 0xffU); + buf[1] = (png_byte)((i >> 16) & 0xffU); + buf[2] = (png_byte)((i >> 8) & 0xffU); + buf[3] = (png_byte)( i & 0xffU); } -#ifdef PNG_SAVE_INT_32_SUPPORTED -/* PNG signed integers are saved in 32-bit 2's complement format. ANSI C-90 - * defines a cast of a signed integer to an unsigned integer either to preserve - * the value, if it is positive, or to calculate: - * - * (UNSIGNED_MAX+1) + integer - * - * Where UNSIGNED_MAX is the appropriate maximum unsigned value, so when the - * negative integral value is added the result will be an unsigned value - * correspnding to the 2's complement representation. - */ -void PNGAPI -png_save_int_32(png_bytep buf, png_int_32 i) -{ - png_save_uint_32(buf, i); -} -#endif - /* Place a 16-bit number into a buffer in PNG byte order. * The parameter is declared unsigned int, not png_uint_16, * just to avoid potential problems on pre-ANSI C compilers. @@ -54,8 +36,8 @@ png_save_int_32(png_bytep buf, png_int_32 i) void PNGAPI png_save_uint_16(png_bytep buf, unsigned int i) { - buf[0] = (png_byte)((i >> 8) & 0xff); - buf[1] = (png_byte)(i & 0xff); + buf[0] = (png_byte)((i >> 8) & 0xffU); + buf[1] = (png_byte)( i & 0xffU); } #endif @@ -66,7 +48,7 @@ png_save_uint_16(png_bytep buf, unsigned int i) * bytes have already been written. */ void PNGAPI -png_write_sig(png_structp png_ptr) +png_write_sig(png_structrp png_ptr) { png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; @@ -88,7 +70,7 @@ png_write_sig(png_structp png_ptr) * passing in png_write_chunk_data(). */ static void -png_write_chunk_header(png_structp png_ptr, png_uint_32 chunk_name, +png_write_chunk_header(png_structrp png_ptr, png_uint_32 chunk_name, png_uint_32 length) { png_byte buf[8]; @@ -130,7 +112,7 @@ png_write_chunk_header(png_structp png_ptr, png_uint_32 chunk_name, } void PNGAPI -png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_string, +png_write_chunk_start(png_structrp png_ptr, png_const_bytep chunk_string, png_uint_32 length) { png_write_chunk_header(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), length); @@ -142,7 +124,7 @@ png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_string, * given to png_write_chunk_header(). */ void PNGAPI -png_write_chunk_data(png_structp png_ptr, png_const_bytep data, +png_write_chunk_data(png_structrp png_ptr, png_const_bytep data, png_size_t length) { /* Write the data, and run the CRC over it */ @@ -154,7 +136,7 @@ png_write_chunk_data(png_structp png_ptr, png_const_bytep data, png_write_data(png_ptr, data, length); /* Update the CRC after writing the data, - * in case that the user I/O routine alters it. + * in case the user I/O routine alters it. */ png_calculate_crc(png_ptr, data, length); } @@ -162,7 +144,7 @@ png_write_chunk_data(png_structp png_ptr, png_const_bytep data, /* Finish a chunk started with png_write_chunk_header(). */ void PNGAPI -png_write_chunk_end(png_structp png_ptr) +png_write_chunk_end(png_structrp png_ptr) { png_byte buf[4]; @@ -191,15 +173,15 @@ png_write_chunk_end(png_structp png_ptr) * functions instead. */ static void -png_write_complete_chunk(png_structp png_ptr, png_uint_32 chunk_name, +png_write_complete_chunk(png_structrp png_ptr, png_uint_32 chunk_name, png_const_bytep data, png_size_t length) { if (png_ptr == NULL) return; - /* On 64 bit architectures 'length' may not fit in a png_uint_32. */ - if (length > PNG_UINT_32_MAX) - png_error(png_ptr, "length exceeds PNG maxima"); + /* On 64-bit architectures 'length' may not fit in a png_uint_32. */ + if (length > PNG_UINT_31_MAX) + png_error(png_ptr, "length exceeds PNG maximum"); png_write_chunk_header(png_ptr, chunk_name, (png_uint_32)length); png_write_chunk_data(png_ptr, data, length); @@ -208,473 +190,487 @@ png_write_complete_chunk(png_structp png_ptr, png_uint_32 chunk_name, /* This is the API that calls the internal function above. */ void PNGAPI -png_write_chunk(png_structp png_ptr, png_const_bytep chunk_string, +png_write_chunk(png_structrp png_ptr, png_const_bytep chunk_string, png_const_bytep data, png_size_t length) { png_write_complete_chunk(png_ptr, PNG_CHUNK_FROM_STRING(chunk_string), data, length); } -/* Initialize the compressor for the appropriate type of compression. */ -static void -png_zlib_claim(png_structp png_ptr, png_uint_32 state) +/* This is used below to find the size of an image to pass to png_deflate_claim, + * so it only needs to be accurate if the size is less than 16384 bytes (the + * point at which a lower LZ window size can be used.) + */ +static png_alloc_size_t +png_image_size(png_structrp png_ptr) { - if (!(png_ptr->zlib_state & PNG_ZLIB_IN_USE)) + /* Only return sizes up to the maximum of a png_uint_32; do this by limiting + * the width and height used to 15 bits. + */ + png_uint_32 h = png_ptr->height; + + if (png_ptr->rowbytes < 32768 && h < 32768) { - /* If already initialized for 'state' do not re-init. */ - if (png_ptr->zlib_state != state) + if (png_ptr->interlaced != 0) { - int ret = Z_OK; - png_const_charp who = "-"; - - /* If actually initialized for another state do a deflateEnd. */ - if (png_ptr->zlib_state != PNG_ZLIB_UNINITIALIZED) - { - ret = deflateEnd(&png_ptr->zstream); - who = "end"; - png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; - } + /* Interlacing makes the image larger because of the replication of + * both the filter byte and the padding to a byte boundary. + */ + png_uint_32 w = png_ptr->width; + unsigned int pd = png_ptr->pixel_depth; + png_alloc_size_t cb_base; + int pass; - /* zlib itself detects an incomplete state on deflateEnd */ - if (ret == Z_OK) switch (state) + for (cb_base=0, pass=0; pass<=6; ++pass) { -# ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED - case PNG_ZLIB_FOR_TEXT: - ret = deflateInit2(&png_ptr->zstream, - png_ptr->zlib_text_level, png_ptr->zlib_text_method, - png_ptr->zlib_text_window_bits, - png_ptr->zlib_text_mem_level, png_ptr->zlib_text_strategy); - who = "text"; - break; -# endif + png_uint_32 pw = PNG_PASS_COLS(w, pass); - case PNG_ZLIB_FOR_IDAT: - ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level, - png_ptr->zlib_method, png_ptr->zlib_window_bits, - png_ptr->zlib_mem_level, png_ptr->zlib_strategy); - who = "IDAT"; - break; - - default: - png_error(png_ptr, "invalid zlib state"); + if (pw > 0) + cb_base += (PNG_ROWBYTES(pd, pw)+1) * PNG_PASS_ROWS(h, pass); } - if (ret == Z_OK) - png_ptr->zlib_state = state; - - else /* an error in deflateEnd or deflateInit2 */ - { - size_t pos = 0; - char msg[64]; - - pos = png_safecat(msg, sizeof msg, pos, - "zlib failed to initialize compressor ("); - pos = png_safecat(msg, sizeof msg, pos, who); - - switch (ret) - { - case Z_VERSION_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") version error"); - break; - - case Z_STREAM_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") stream error"); - break; - - case Z_MEM_ERROR: - pos = png_safecat(msg, sizeof msg, pos, ") memory error"); - break; - - default: - pos = png_safecat(msg, sizeof msg, pos, ") unknown error"); - break; - } - - png_error(png_ptr, msg); - } + return cb_base; } - /* Here on success, claim the zstream: */ - png_ptr->zlib_state |= PNG_ZLIB_IN_USE; + else + return (png_ptr->rowbytes+1) * h; } else - png_error(png_ptr, "zstream already in use (internal error)"); + return 0xffffffffU; } -/* The opposite: release the stream. It is also reset, this API will warn on - * error but will not fail. - */ +#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + /* This is the code to hack the first two bytes of the deflate stream (the + * deflate header) to correct the windowBits value to match the actual data + * size. Note that the second argument is the *uncompressed* size but the + * first argument is the *compressed* data (and it must be deflate + * compressed.) + */ static void -png_zlib_release(png_structp png_ptr) +optimize_cmf(png_bytep data, png_alloc_size_t data_size) { - if (png_ptr->zlib_state & PNG_ZLIB_IN_USE) + /* Optimize the CMF field in the zlib stream. The resultant zlib stream is + * still compliant to the stream specification. + */ + if (data_size <= 16384) /* else windowBits must be 15 */ { - int ret = deflateReset(&png_ptr->zstream); - - png_ptr->zlib_state &= ~PNG_ZLIB_IN_USE; + unsigned int z_cmf = data[0]; /* zlib compression method and flags */ - if (ret != Z_OK) + if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) { -#ifdef PNG_WARNINGS_SUPPORTED - png_const_charp err; - PNG_WARNING_PARAMETERS(p) + unsigned int z_cinfo; + unsigned int half_z_window_size; - switch (ret) + z_cinfo = z_cmf >> 4; + half_z_window_size = 1U << (z_cinfo + 7); + + if (data_size <= half_z_window_size) /* else no change */ { - case Z_VERSION_ERROR: - err = "version"; - break; + unsigned int tmp; - case Z_STREAM_ERROR: - err = "stream"; - break; + do + { + half_z_window_size >>= 1; + --z_cinfo; + } + while (z_cinfo > 0 && data_size <= half_z_window_size); - case Z_MEM_ERROR: - err = "memory"; - break; + z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); - default: - err = "unknown"; - break; + data[0] = (png_byte)z_cmf; + tmp = data[1] & 0xe0; + tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; + data[1] = (png_byte)tmp; } - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, ret); - png_warning_parameter(p, 2, err); - - if (png_ptr->zstream.msg) - err = png_ptr->zstream.msg; - else - err = "[no zlib message]"; - - png_warning_parameter(p, 3, err); - - png_formatted_warning(png_ptr, p, - "zlib failed to reset compressor: @1(@2): @3"); -#endif } } - - else - png_warning(png_ptr, "zstream not in use (internal error)"); } +#endif /* WRITE_OPTIMIZE_CMF */ -#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED -/* This pair of functions encapsulates the operation of (a) compressing a - * text string, and (b) issuing it later as a series of chunk data writes. - * The compression_state structure is shared context for these functions - * set up by the caller in order to make the whole mess thread-safe. - */ - -typedef struct -{ - png_const_bytep input; /* The uncompressed input data */ - png_size_t input_len; /* Its length */ - int num_output_ptr; /* Number of output pointers used */ - int max_output_ptr; /* Size of output_ptr */ - png_bytep *output_ptr; /* Array of pointers to output */ -} compression_state; - -/* Compress given text into storage in the png_ptr structure */ -static int /* PRIVATE */ -png_text_compress(png_structp png_ptr, - png_const_charp text, png_size_t text_len, int compression, - compression_state *comp) +/* Initialize the compressor for the appropriate type of compression. */ +static int +png_deflate_claim(png_structrp png_ptr, png_uint_32 owner, + png_alloc_size_t data_size) { - int ret; + if (png_ptr->zowner != 0) + { +#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED) + char msg[64]; + + PNG_STRING_FROM_CHUNK(msg, owner); + msg[4] = ':'; + msg[5] = ' '; + PNG_STRING_FROM_CHUNK(msg+6, png_ptr->zowner); + /* So the message that results is "<chunk> using zstream"; this is an + * internal error, but is very useful for debugging. i18n requirements + * are minimal. + */ + (void)png_safecat(msg, (sizeof msg), 10, " using zstream"); +#endif +#if PNG_RELEASE_BUILD + png_warning(png_ptr, msg); - comp->num_output_ptr = 0; - comp->max_output_ptr = 0; - comp->output_ptr = NULL; - comp->input = NULL; - comp->input_len = text_len; + /* Attempt sane error recovery */ + if (png_ptr->zowner == png_IDAT) /* don't steal from IDAT */ + { + png_ptr->zstream.msg = PNGZ_MSG_CAST("in use by IDAT"); + return Z_STREAM_ERROR; + } - /* We may just want to pass the text right through */ - if (compression == PNG_TEXT_COMPRESSION_NONE) - { - comp->input = (png_const_bytep)text; - return((int)text_len); + png_ptr->zowner = 0; +#else + png_error(png_ptr, msg); +#endif } - if (compression >= PNG_TEXT_COMPRESSION_LAST) { - PNG_WARNING_PARAMETERS(p) - - png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, - compression); - png_formatted_warning(png_ptr, p, "Unknown compression type @1"); - } + int level = png_ptr->zlib_level; + int method = png_ptr->zlib_method; + int windowBits = png_ptr->zlib_window_bits; + int memLevel = png_ptr->zlib_mem_level; + int strategy; /* set below */ + int ret; /* zlib return code */ - /* We can't write the chunk until we find out how much data we have, - * which means we need to run the compressor first and save the - * output. This shouldn't be a problem, as the vast majority of - * comments should be reasonable, but we will set up an array of - * malloc'd pointers to be sure. - * - * If we knew the application was well behaved, we could simplify this - * greatly by assuming we can always malloc an output buffer large - * enough to hold the compressed text ((1001 * text_len / 1000) + 12) - * and malloc this directly. The only time this would be a bad idea is - * if we can't malloc more than 64K and we have 64K of random input - * data, or if the input string is incredibly large (although this - * wouldn't cause a failure, just a slowdown due to swapping). - */ - png_zlib_claim(png_ptr, PNG_ZLIB_FOR_TEXT); + if (owner == png_IDAT) + { + if ((png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY) != 0) + strategy = png_ptr->zlib_strategy; - /* Set up the compression buffers */ - /* TODO: the following cast hides a potential overflow problem. */ - png_ptr->zstream.avail_in = (uInt)text_len; + else if (png_ptr->do_filter != PNG_FILTER_NONE) + strategy = PNG_Z_DEFAULT_STRATEGY; - /* NOTE: assume zlib doesn't overwrite the input */ - png_ptr->zstream.next_in = (Bytef *)text; - png_ptr->zstream.avail_out = png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; + else + strategy = PNG_Z_DEFAULT_NOFILTER_STRATEGY; + } - /* This is the same compression loop as in png_write_row() */ - do - { - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); + else + { +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED + level = png_ptr->zlib_text_level; + method = png_ptr->zlib_text_method; + windowBits = png_ptr->zlib_text_window_bits; + memLevel = png_ptr->zlib_text_mem_level; + strategy = png_ptr->zlib_text_strategy; +#else + /* If customization is not supported the values all come from the + * IDAT values except for the strategy, which is fixed to the + * default. (This is the pre-1.6.0 behavior too, although it was + * implemented in a very different way.) + */ + strategy = Z_DEFAULT_STRATEGY; +#endif + } - if (ret != Z_OK) + /* Adjust 'windowBits' down if larger than 'data_size'; to stop this + * happening just pass 32768 as the data_size parameter. Notice that zlib + * requires an extra 262 bytes in the window in addition to the data to be + * able to see the whole of the data, so if data_size+262 takes us to the + * next windowBits size we need to fix up the value later. (Because even + * though deflate needs the extra window, inflate does not!) + */ + if (data_size <= 16384) { - /* Error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); + /* IMPLEMENTATION NOTE: this 'half_window_size' stuff is only here to + * work round a Microsoft Visual C misbehavior which, contrary to C-90, + * widens the result of the following shift to 64-bits if (and, + * apparently, only if) it is used in a test. + */ + unsigned int half_window_size = 1U << (windowBits-1); - else - png_error(png_ptr, "zlib error"); + while (data_size + 262 <= half_window_size) + { + half_window_size >>= 1; + --windowBits; + } } - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) + /* Check against the previous initialized values, if any. */ + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0 && + (png_ptr->zlib_set_level != level || + png_ptr->zlib_set_method != method || + png_ptr->zlib_set_window_bits != windowBits || + png_ptr->zlib_set_mem_level != memLevel || + png_ptr->zlib_set_strategy != strategy)) { - /* Make sure the output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) - { - int old_max; + if (deflateEnd(&png_ptr->zstream) != Z_OK) + png_warning(png_ptr, "deflateEnd failed (ignored)"); - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) - { - png_bytepp old_ptr; + png_ptr->flags &= ~PNG_FLAG_ZSTREAM_INITIALIZED; + } - old_ptr = comp->output_ptr; + /* For safety clear out the input and output pointers (currently zlib + * doesn't use them on Init, but it might in the future). + */ + png_ptr->zstream.next_in = NULL; + png_ptr->zstream.avail_in = 0; + png_ptr->zstream.next_out = NULL; + png_ptr->zstream.avail_out = 0; - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (comp->max_output_ptr * png_sizeof(png_bytep))); + /* Now initialize if required, setting the new parameters, otherwise just + * to a simple reset to the previous parameters. + */ + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED) != 0) + ret = deflateReset(&png_ptr->zstream); - png_memcpy(comp->output_ptr, old_ptr, old_max - * png_sizeof(png_bytep)); + else + { + ret = deflateInit2(&png_ptr->zstream, level, method, windowBits, + memLevel, strategy); - png_free(png_ptr, old_ptr); - } - else - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (comp->max_output_ptr * png_sizeof(png_bytep))); - } + if (ret == Z_OK) + png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED; + } - /* Save the data */ - comp->output_ptr[comp->num_output_ptr] = - (png_bytep)png_malloc(png_ptr, png_ptr->zbuf_size); + /* The return code is from either deflateReset or deflateInit2; they have + * pretty much the same set of error codes. + */ + if (ret == Z_OK) + png_ptr->zowner = owner; - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); + else + png_zstream_error(png_ptr, ret); - comp->num_output_ptr++; + return ret; + } +} - /* and reset the buffer */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } - /* Continue until we don't have any more to compress */ - } while (png_ptr->zstream.avail_in); +/* Clean up (or trim) a linked list of compression buffers. */ +void /* PRIVATE */ +png_free_buffer_list(png_structrp png_ptr, png_compression_bufferp *listp) +{ + png_compression_bufferp list = *listp; - /* Finish the compression */ - do + if (list != NULL) { - /* Tell zlib we are finished */ - ret = deflate(&png_ptr->zstream, Z_FINISH); + *listp = NULL; - if (ret == Z_OK) + do { - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - /* Check to make sure our output array has room */ - if (comp->num_output_ptr >= comp->max_output_ptr) - { - int old_max; + png_compression_bufferp next = list->next; - old_max = comp->max_output_ptr; - comp->max_output_ptr = comp->num_output_ptr + 4; - if (comp->output_ptr != NULL) - { - png_bytepp old_ptr; + png_free(png_ptr, list); + list = next; + } + while (list != NULL); + } +} - old_ptr = comp->output_ptr; +#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED +/* This pair of functions encapsulates the operation of (a) compressing a + * text string, and (b) issuing it later as a series of chunk data writes. + * The compression_state structure is shared context for these functions + * set up by the caller to allow access to the relevant local variables. + * + * compression_buffer (new in 1.6.0) is just a linked list of zbuffer_size + * temporary buffers. From 1.6.0 it is retained in png_struct so that it will + * be correctly freed in the event of a write error (previous implementations + * just leaked memory.) + */ +typedef struct +{ + png_const_bytep input; /* The uncompressed input data */ + png_alloc_size_t input_len; /* Its length */ + png_uint_32 output_len; /* Final compressed length */ + png_byte output[1024]; /* First block of output */ +} compression_state; - /* This could be optimized to realloc() */ - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); +static void +png_text_compress_init(compression_state *comp, png_const_bytep input, + png_alloc_size_t input_len) +{ + comp->input = input; + comp->input_len = input_len; + comp->output_len = 0; +} - png_memcpy(comp->output_ptr, old_ptr, - old_max * png_sizeof(png_charp)); +/* Compress the data in the compression state input */ +static int +png_text_compress(png_structrp png_ptr, png_uint_32 chunk_name, + compression_state *comp, png_uint_32 prefix_len) +{ + int ret; - png_free(png_ptr, old_ptr); - } + /* To find the length of the output it is necessary to first compress the + * input. The result is buffered rather than using the two-pass algorithm + * that is used on the inflate side; deflate is assumed to be slower and a + * PNG writer is assumed to have more memory available than a PNG reader. + * + * IMPLEMENTATION NOTE: the zlib API deflateBound() can be used to find an + * upper limit on the output size, but it is always bigger than the input + * size so it is likely to be more efficient to use this linked-list + * approach. + */ + ret = png_deflate_claim(png_ptr, chunk_name, comp->input_len); - else - comp->output_ptr = (png_bytepp)png_malloc(png_ptr, - (png_alloc_size_t)(comp->max_output_ptr * - png_sizeof(png_charp))); - } + if (ret != Z_OK) + return ret; - /* Save the data */ - comp->output_ptr[comp->num_output_ptr] = - (png_bytep)png_malloc(png_ptr, - (png_alloc_size_t)png_ptr->zbuf_size); + /* Set up the compression buffers, we need a loop here to avoid overflowing a + * uInt. Use ZLIB_IO_MAX to limit the input. The output is always limited + * by the output buffer size, so there is no need to check that. Since this + * is ANSI-C we know that an 'int', hence a uInt, is always at least 16 bits + * in size. + */ + { + png_compression_bufferp *end = &png_ptr->zbuffer_list; + png_alloc_size_t input_len = comp->input_len; /* may be zero! */ + png_uint_32 output_len; - png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, - png_ptr->zbuf_size); + /* zlib updates these for us: */ + png_ptr->zstream.next_in = PNGZ_INPUT_CAST(comp->input); + png_ptr->zstream.avail_in = 0; /* Set below */ + png_ptr->zstream.next_out = comp->output; + png_ptr->zstream.avail_out = (sizeof comp->output); - comp->num_output_ptr++; + output_len = png_ptr->zstream.avail_out; - /* and reset the buffer pointers */ - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; - } - } - else if (ret != Z_STREAM_END) + do { - /* We got an error */ - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); + uInt avail_in = ZLIB_IO_MAX; - else - png_error(png_ptr, "zlib error"); - } - } while (ret != Z_STREAM_END); + if (avail_in > input_len) + avail_in = (uInt)input_len; - /* Text length is number of buffers plus last buffer */ - text_len = png_ptr->zbuf_size * comp->num_output_ptr; + input_len -= avail_in; - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out; + png_ptr->zstream.avail_in = avail_in; - return((int)text_len); -} - -/* Ship the compressed text out via chunk writes */ -static void /* PRIVATE */ -png_write_compressed_data_out(png_structp png_ptr, compression_state *comp, - png_size_t data_len) -{ - int i; + if (png_ptr->zstream.avail_out == 0) + { + png_compression_buffer *next; - /* Handle the no-compression case */ - if (comp->input) - { - png_write_chunk_data(png_ptr, comp->input, data_len); + /* Chunk data is limited to 2^31 bytes in length, so the prefix + * length must be counted here. + */ + if (output_len + prefix_len > PNG_UINT_31_MAX) + { + ret = Z_MEM_ERROR; + break; + } - return; - } + /* Need a new (malloc'ed) buffer, but there may be one present + * already. + */ + next = *end; + if (next == NULL) + { + next = png_voidcast(png_compression_bufferp, png_malloc_base + (png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr))); -#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED - /* The zbuf_size test is because the code below doesn't work if zbuf_size is - * '1'; simply skip it to avoid memory overwrite. - */ - if (data_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1) - { - unsigned int z_cmf; /* zlib compression method and flags */ + if (next == NULL) + { + ret = Z_MEM_ERROR; + break; + } - /* Optimize the CMF field in the zlib stream. This hack of the zlib - * stream is compliant to the stream specification. - */ + /* Link in this buffer (so that it will be freed later) */ + next->next = NULL; + *end = next; + } - if (comp->num_output_ptr) - z_cmf = comp->output_ptr[0][0]; - else - z_cmf = png_ptr->zbuf[0]; + png_ptr->zstream.next_out = next->output; + png_ptr->zstream.avail_out = png_ptr->zbuffer_size; + output_len += png_ptr->zstream.avail_out; - if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) - { - unsigned int z_cinfo; - unsigned int half_z_window_size; - png_size_t uncompressed_text_size = comp->input_len; + /* Move 'end' to the next buffer pointer. */ + end = &next->next; + } - z_cinfo = z_cmf >> 4; - half_z_window_size = 1 << (z_cinfo + 7); + /* Compress the data */ + ret = deflate(&png_ptr->zstream, + input_len > 0 ? Z_NO_FLUSH : Z_FINISH); - while (uncompressed_text_size <= half_z_window_size && - half_z_window_size >= 256) - { - z_cinfo--; - half_z_window_size >>= 1; - } + /* Claw back input data that was not consumed (because avail_in is + * reset above every time round the loop). + */ + input_len += png_ptr->zstream.avail_in; + png_ptr->zstream.avail_in = 0; /* safety */ + } + while (ret == Z_OK); - z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); + /* There may be some space left in the last output buffer. This needs to + * be subtracted from output_len. + */ + output_len -= png_ptr->zstream.avail_out; + png_ptr->zstream.avail_out = 0; /* safety */ + comp->output_len = output_len; - if (comp->num_output_ptr) - { + /* Now double check the output length, put in a custom message if it is + * too long. Otherwise ensure the z_stream::msg pointer is set to + * something. + */ + if (output_len + prefix_len >= PNG_UINT_31_MAX) + { + png_ptr->zstream.msg = PNGZ_MSG_CAST("compressed data too long"); + ret = Z_MEM_ERROR; + } - if (comp->output_ptr[0][0] != z_cmf) - { - int tmp; + else + png_zstream_error(png_ptr, ret); - comp->output_ptr[0][0] = (png_byte)z_cmf; - tmp = comp->output_ptr[0][1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - comp->output_ptr[0][1] = (png_byte)tmp; - } - } - else - { - int tmp; + /* Reset zlib for another zTXt/iTXt or image data */ + png_ptr->zowner = 0; - png_ptr->zbuf[0] = (png_byte)z_cmf; - tmp = png_ptr->zbuf[1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - png_ptr->zbuf[1] = (png_byte)tmp; - } + /* The only success case is Z_STREAM_END, input_len must be 0; if not this + * is an internal error. + */ + if (ret == Z_STREAM_END && input_len == 0) + { +#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + /* Fix up the deflate header, if required */ + optimize_cmf(comp->output, comp->input_len); +#endif + /* But Z_OK is returned, not Z_STREAM_END; this allows the claim + * function above to return Z_STREAM_END on an error (though it never + * does in the current versions of zlib.) + */ + return Z_OK; } else - png_error(png_ptr, - "Invalid zlib compression method or flags in non-IDAT chunk"); + return ret; } -#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ +} + +/* Ship the compressed text out via chunk writes */ +static void +png_write_compressed_data_out(png_structrp png_ptr, compression_state *comp) +{ + png_uint_32 output_len = comp->output_len; + png_const_bytep output = comp->output; + png_uint_32 avail = (sizeof comp->output); + png_compression_buffer *next = png_ptr->zbuffer_list; - /* Write saved output buffers, if any */ - for (i = 0; i < comp->num_output_ptr; i++) + for (;;) { - png_write_chunk_data(png_ptr, comp->output_ptr[i], - (png_size_t)png_ptr->zbuf_size); + if (avail > output_len) + avail = output_len; - png_free(png_ptr, comp->output_ptr[i]); - } + png_write_chunk_data(png_ptr, output, avail); - if (comp->max_output_ptr != 0) - png_free(png_ptr, comp->output_ptr); + output_len -= avail; - /* Write anything left in zbuf */ - if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size) - png_write_chunk_data(png_ptr, png_ptr->zbuf, - (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out)); + if (output_len == 0 || next == NULL) + break; + + avail = png_ptr->zbuffer_size; + output = next->output; + next = next->next; + } - /* Reset zlib for another zTXt/iTXt or image data */ - png_zlib_release(png_ptr); + /* This is an internal error; 'next' must have been NULL! */ + if (output_len > 0) + png_error(png_ptr, "error writing ancillary chunked compressed data"); } -#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ +#endif /* WRITE_COMPRESSED_TEXT */ /* Write the IHDR chunk, and update the png_struct with the necessary * information. Note that the rest of this code depends upon this * information being correct. */ void /* PRIVATE */ -png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, +png_write_IHDR(png_structrp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int compression_type, int filter_type, int interlace_type) { @@ -768,8 +764,8 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, */ if ( #ifdef PNG_MNG_FEATURES_SUPPORTED - !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && - ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) && + !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) != 0 && + ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) && (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_RGB_ALPHA) && (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) && @@ -791,7 +787,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, interlace_type=PNG_INTERLACE_NONE; #endif - /* Save the relevent information */ + /* Save the relevant information */ png_ptr->bit_depth = (png_byte)bit_depth; png_ptr->color_type = (png_byte)color_type; png_ptr->interlaced = (png_byte)interlace_type; @@ -821,11 +817,6 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, /* Write the chunk */ png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13); - /* Initialize zlib with PNG info */ - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - if ((png_ptr->do_filter) == PNG_NO_FILTERS) { if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || @@ -836,55 +827,6 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, png_ptr->do_filter = PNG_ALL_FILTERS; } - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY)) - { - if (png_ptr->do_filter != PNG_FILTER_NONE) - png_ptr->zlib_strategy = Z_FILTERED; - - else - png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY; - } - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL)) - png_ptr->zlib_level = Z_DEFAULT_COMPRESSION; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL)) - png_ptr->zlib_mem_level = 8; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS)) - png_ptr->zlib_window_bits = 15; - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD)) - png_ptr->zlib_method = 8; - -#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED -#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_STRATEGY)) - png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_LEVEL)) - png_ptr->zlib_text_level = png_ptr->zlib_level; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL)) - png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS)) - png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; - - if (!(png_ptr->flags & PNG_FLAG_ZTXT_CUSTOM_METHOD)) - png_ptr->zlib_text_method = png_ptr->zlib_method; -#else - png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY; - png_ptr->zlib_text_level = png_ptr->zlib_level; - png_ptr->zlib_text_mem_level = png_ptr->zlib_mem_level; - png_ptr->zlib_text_window_bits = png_ptr->zlib_window_bits; - png_ptr->zlib_text_method = png_ptr->zlib_method; -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ -#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */ - - /* Record that the compressor has not yet been initialized. */ - png_ptr->zlib_state = PNG_ZLIB_UNINITIALIZED; - png_ptr->mode = PNG_HAVE_IHDR; /* not READY_FOR_ZTXT */ } @@ -893,7 +835,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height, * structure. */ void /* PRIVATE */ -png_write_PLTE(png_structp png_ptr, png_const_colorp palette, +png_write_PLTE(png_structrp png_ptr, png_const_colorp palette, png_uint_32 num_pal) { png_uint_32 max_palette_length, i; @@ -907,7 +849,7 @@ png_write_PLTE(png_structp png_ptr, png_const_colorp palette, if (( #ifdef PNG_MNG_FEATURES_SUPPORTED - !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) && + (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 && #endif num_pal == 0) || num_pal > max_palette_length) { @@ -923,7 +865,7 @@ png_write_PLTE(png_structp png_ptr, png_const_colorp palette, } } - if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) + if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) == 0) { png_warning(png_ptr, "Ignoring request to write a PLTE chunk in grayscale PNG"); @@ -964,94 +906,165 @@ png_write_PLTE(png_structp png_ptr, png_const_colorp palette, png_ptr->mode |= PNG_HAVE_PLTE; } -/* Write an IDAT chunk */ +/* This is similar to png_text_compress, above, except that it does not require + * all of the data at once and, instead of buffering the compressed result, + * writes it as IDAT chunks. Unlike png_text_compress it *can* png_error out + * because it calls the write interface. As a result it does its own error + * reporting and does not return an error code. In the event of error it will + * just call png_error. The input data length may exceed 32-bits. The 'flush' + * parameter is exactly the same as that to deflate, with the following + * meanings: + * + * Z_NO_FLUSH: normal incremental output of compressed data + * Z_SYNC_FLUSH: do a SYNC_FLUSH, used by png_write_flush + * Z_FINISH: this is the end of the input, do a Z_FINISH and clean up + * + * The routine manages the acquire and release of the png_ptr->zstream by + * checking and (at the end) clearing png_ptr->zowner; it does some sanity + * checks on the 'mode' flags while doing this. + */ void /* PRIVATE */ -png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length) +png_compress_IDAT(png_structrp png_ptr, png_const_bytep input, + png_alloc_size_t input_len, int flush) { - png_debug(1, "in png_write_IDAT"); + if (png_ptr->zowner != png_IDAT) + { + /* First time. Ensure we have a temporary buffer for compression and + * trim the buffer list if it has more than one entry to free memory. + * If 'WRITE_COMPRESSED_TEXT' is not set the list will never have been + * created at this point, but the check here is quick and safe. + */ + if (png_ptr->zbuffer_list == NULL) + { + png_ptr->zbuffer_list = png_voidcast(png_compression_bufferp, + png_malloc(png_ptr, PNG_COMPRESSION_BUFFER_SIZE(png_ptr))); + png_ptr->zbuffer_list->next = NULL; + } -#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED - if (!(png_ptr->mode & PNG_HAVE_IDAT) && - png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) + else + png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list->next); + + /* It is a terminal error if we can't claim the zstream. */ + if (png_deflate_claim(png_ptr, png_IDAT, png_image_size(png_ptr)) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); + + /* The output state is maintained in png_ptr->zstream, so it must be + * initialized here after the claim. + */ + png_ptr->zstream.next_out = png_ptr->zbuffer_list->output; + png_ptr->zstream.avail_out = png_ptr->zbuffer_size; + } + + /* Now loop reading and writing until all the input is consumed or an error + * terminates the operation. The _out values are maintained across calls to + * this function, but the input must be reset each time. + */ + png_ptr->zstream.next_in = PNGZ_INPUT_CAST(input); + png_ptr->zstream.avail_in = 0; /* set below */ + for (;;) { - /* Optimize the CMF field in the zlib stream. This hack of the zlib - * stream is compliant to the stream specification. + int ret; + + /* INPUT: from the row data */ + uInt avail = ZLIB_IO_MAX; + + if (avail > input_len) + avail = (uInt)input_len; /* safe because of the check */ + + png_ptr->zstream.avail_in = avail; + input_len -= avail; + + ret = deflate(&png_ptr->zstream, input_len > 0 ? Z_NO_FLUSH : flush); + + /* Include as-yet unconsumed input */ + input_len += png_ptr->zstream.avail_in; + png_ptr->zstream.avail_in = 0; + + /* OUTPUT: write complete IDAT chunks when avail_out drops to zero. Note + * that these two zstream fields are preserved across the calls, therefore + * there is no need to set these up on entry to the loop. */ - unsigned int z_cmf = data[0]; /* zlib compression method and flags */ + if (png_ptr->zstream.avail_out == 0) + { + png_bytep data = png_ptr->zbuffer_list->output; + uInt size = png_ptr->zbuffer_size; - if ((z_cmf & 0x0f) == 8 && (z_cmf & 0xf0) <= 0x70) + /* Write an IDAT containing the data then reset the buffer. The + * first IDAT may need deflate header optimization. + */ +#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 && + png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) + optimize_cmf(data, png_image_size(png_ptr)); +#endif + + png_write_complete_chunk(png_ptr, png_IDAT, data, size); + png_ptr->mode |= PNG_HAVE_IDAT; + + png_ptr->zstream.next_out = data; + png_ptr->zstream.avail_out = size; + + /* For SYNC_FLUSH or FINISH it is essential to keep calling zlib with + * the same flush parameter until it has finished output, for NO_FLUSH + * it doesn't matter. + */ + if (ret == Z_OK && flush != Z_NO_FLUSH) + continue; + } + + /* The order of these checks doesn't matter much; it just affects which + * possible error might be detected if multiple things go wrong at once. + */ + if (ret == Z_OK) /* most likely return code! */ { - /* Avoid memory underflows and multiplication overflows. - * - * The conditions below are practically always satisfied; - * however, they still must be checked. + /* If all the input has been consumed then just return. If Z_FINISH + * was used as the flush parameter something has gone wrong if we get + * here. */ - if (length >= 2 && - png_ptr->height < 16384 && png_ptr->width < 16384) + if (input_len == 0) { - /* Compute the maximum possible length of the datastream */ + if (flush == Z_FINISH) + png_error(png_ptr, "Z_OK on Z_FINISH with output space"); - /* Number of pixels, plus for each row a filter byte - * and possibly a padding byte, so increase the maximum - * size to account for these. - */ - unsigned int z_cinfo; - unsigned int half_z_window_size; - png_uint_32 uncompressed_idat_size = png_ptr->height * - ((png_ptr->width * - png_ptr->channels * png_ptr->bit_depth + 15) >> 3); - - /* If it's interlaced, each block of 8 rows is sent as up to - * 14 rows, i.e., 6 additional rows, each with a filter byte - * and possibly a padding byte - */ - if (png_ptr->interlaced) - uncompressed_idat_size += ((png_ptr->height + 7)/8) * - (png_ptr->bit_depth < 8 ? 12 : 6); + return; + } + } - z_cinfo = z_cmf >> 4; - half_z_window_size = 1 << (z_cinfo + 7); + else if (ret == Z_STREAM_END && flush == Z_FINISH) + { + /* This is the end of the IDAT data; any pending output must be + * flushed. For small PNG files we may still be at the beginning. + */ + png_bytep data = png_ptr->zbuffer_list->output; + uInt size = png_ptr->zbuffer_size - png_ptr->zstream.avail_out; - while (uncompressed_idat_size <= half_z_window_size && - half_z_window_size >= 256) - { - z_cinfo--; - half_z_window_size >>= 1; - } +#ifdef PNG_WRITE_OPTIMIZE_CMF_SUPPORTED + if ((png_ptr->mode & PNG_HAVE_IDAT) == 0 && + png_ptr->compression_type == PNG_COMPRESSION_TYPE_BASE) + optimize_cmf(data, png_image_size(png_ptr)); +#endif - z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4); + png_write_complete_chunk(png_ptr, png_IDAT, data, size); + png_ptr->zstream.avail_out = 0; + png_ptr->zstream.next_out = NULL; + png_ptr->mode |= PNG_HAVE_IDAT | PNG_AFTER_IDAT; - if (data[0] != z_cmf) - { - int tmp; - data[0] = (png_byte)z_cmf; - tmp = data[1] & 0xe0; - tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f; - data[1] = (png_byte)tmp; - } - } + png_ptr->zowner = 0; /* Release the stream */ + return; } else - png_error(png_ptr, - "Invalid zlib compression method or flags in IDAT"); + { + /* This is an error condition. */ + png_zstream_error(png_ptr, ret); + png_error(png_ptr, png_ptr->zstream.msg); + } } -#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */ - - png_write_complete_chunk(png_ptr, png_IDAT, data, length); - png_ptr->mode |= PNG_HAVE_IDAT; - - /* Prior to 1.5.4 this code was replicated in every caller (except at the - * end, where it isn't technically necessary). Since this function has - * flushed the data we can safely reset the zlib output buffer here. - */ - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; } /* Write an IEND chunk */ void /* PRIVATE */ -png_write_IEND(png_structp png_ptr) +png_write_IEND(png_structrp png_ptr) { png_debug(1, "in png_write_IEND"); @@ -1062,7 +1075,7 @@ png_write_IEND(png_structp png_ptr) #ifdef PNG_WRITE_gAMA_SUPPORTED /* Write a gAMA chunk */ void /* PRIVATE */ -png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) +png_write_gAMA_fixed(png_structrp png_ptr, png_fixed_point file_gamma) { png_byte buf[4]; @@ -1077,7 +1090,7 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma) #ifdef PNG_WRITE_sRGB_SUPPORTED /* Write a sRGB chunk */ void /* PRIVATE */ -png_write_sRGB(png_structp png_ptr, int srgb_intent) +png_write_sRGB(png_structrp png_ptr, int srgb_intent) { png_byte buf[1]; @@ -1095,79 +1108,60 @@ png_write_sRGB(png_structp png_ptr, int srgb_intent) #ifdef PNG_WRITE_iCCP_SUPPORTED /* Write an iCCP chunk */ void /* PRIVATE */ -png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type, - png_const_charp profile, int profile_len) +png_write_iCCP(png_structrp png_ptr, png_const_charp name, + png_const_bytep profile) { - png_size_t name_len; + png_uint_32 name_len; + png_uint_32 profile_len; + png_byte new_name[81]; /* 1 byte for the compression byte */ compression_state comp; - int embedded_profile_len = 0; + png_uint_32 temp; png_debug(1, "in png_write_iCCP"); - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - comp.input_len = 0; - - name_len = png_strlen(name); + /* These are all internal problems: the profile should have been checked + * before when it was stored. + */ + if (profile == NULL) + png_error(png_ptr, "No profile for iCCP chunk"); /* internal error */ - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - png_warning(png_ptr, "Unknown compression type in iCCP chunk"); + profile_len = png_get_uint_32(profile); - if (profile == NULL) - profile_len = 0; + if (profile_len < 132) + png_error(png_ptr, "ICC profile too short"); - if (profile_len > 3) - embedded_profile_len = - ((*( (png_const_bytep)profile ))<<24) | - ((*( (png_const_bytep)profile + 1))<<16) | - ((*( (png_const_bytep)profile + 2))<< 8) | - ((*( (png_const_bytep)profile + 3)) ); + temp = (png_uint_32) (*(profile+8)); + if (temp > 3 && (profile_len & 0x03)) + png_error(png_ptr, "ICC profile length invalid (not a multiple of 4)"); - if (embedded_profile_len < 0) { - png_warning(png_ptr, - "Embedded profile length in iCCP chunk is negative"); - return; - } + png_uint_32 embedded_profile_len = png_get_uint_32(profile); - if (profile_len < embedded_profile_len) - { - png_warning(png_ptr, - "Embedded profile length too large in iCCP chunk"); - return; + if (profile_len != embedded_profile_len) + png_error(png_ptr, "Profile length does not match profile"); } - if (profile_len > embedded_profile_len) - { - png_warning(png_ptr, - "Truncating profile to actual length in iCCP chunk"); + name_len = png_check_keyword(png_ptr, name, new_name); - profile_len = embedded_profile_len; - } + if (name_len == 0) + png_error(png_ptr, "iCCP: invalid keyword"); - if (profile_len != 0) - profile_len = png_text_compress(png_ptr, profile, - (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp); + new_name[++name_len] = PNG_COMPRESSION_TYPE_BASE; /* Make sure we include the NULL after the name and the compression type */ - png_write_chunk_header(png_ptr, png_iCCP, - (png_uint_32)(name_len + profile_len + 2)); + ++name_len; - png_write_chunk_data(png_ptr, (png_bytep)name, name_len); + png_text_compress_init(&comp, profile, profile_len); - { - png_byte buffer[2]; - buffer[0] = 0; /* terminate name */ - buffer[1] = 0xFFU & compression_type; - png_write_chunk_data(png_ptr, buffer, 2); - } + /* Allow for keyword terminator and compression byte */ + if (png_text_compress(png_ptr, png_iCCP, &comp, name_len) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); - if (profile_len != 0) - { - png_write_compressed_data_out(png_ptr, &comp, profile_len); - } + png_write_chunk_header(png_ptr, png_iCCP, name_len + comp.output_len); + + png_write_chunk_data(png_ptr, new_name, name_len); + + png_write_compressed_data_out(png_ptr, &comp); png_write_chunk_end(png_ptr); } @@ -1176,9 +1170,10 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type, #ifdef PNG_WRITE_sPLT_SUPPORTED /* Write a sPLT chunk */ void /* PRIVATE */ -png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) +png_write_sPLT(png_structrp png_ptr, png_const_sPLT_tp spalette) { - png_size_t name_len; + png_uint_32 name_len; + png_byte new_name[80]; png_byte entrybuf[10]; png_size_t entry_size = (spalette->depth == 8 ? 6 : 10); png_size_t palette_size = entry_size * spalette->nentries; @@ -1189,13 +1184,16 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) png_debug(1, "in png_write_sPLT"); - name_len = png_strlen(spalette->name); + name_len = png_check_keyword(png_ptr, spalette->name, new_name); + + if (name_len == 0) + png_error(png_ptr, "sPLT: invalid keyword"); /* Make sure we include the NULL after the name */ png_write_chunk_header(png_ptr, png_sPLT, (png_uint_32)(name_len + 2 + palette_size)); - png_write_chunk_data(png_ptr, (png_bytep)spalette->name, + png_write_chunk_data(png_ptr, (png_bytep)new_name, (png_size_t)(name_len + 1)); png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1); @@ -1222,7 +1220,7 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) png_save_uint_16(entrybuf + 8, ep->frequency); } - png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); + png_write_chunk_data(png_ptr, entrybuf, entry_size); } #else ep=spalette->entries; @@ -1246,7 +1244,7 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) png_save_uint_16(entrybuf + 8, ep[i].frequency); } - png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size); + png_write_chunk_data(png_ptr, entrybuf, entry_size); } #endif @@ -1257,7 +1255,7 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) #ifdef PNG_WRITE_sBIT_SUPPORTED /* Write the sBIT chunk */ void /* PRIVATE */ -png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) +png_write_sBIT(png_structrp png_ptr, png_const_color_8p sbit, int color_type) { png_byte buf[4]; png_size_t size; @@ -1265,7 +1263,7 @@ png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) png_debug(1, "in png_write_sBIT"); /* Make sure we don't depend upon the order of PNG_COLOR_8 */ - if (color_type & PNG_COLOR_MASK_COLOR) + if ((color_type & PNG_COLOR_MASK_COLOR) != 0) { png_byte maxbits; @@ -1298,7 +1296,7 @@ png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) size = 1; } - if (color_type & PNG_COLOR_MASK_ALPHA) + if ((color_type & PNG_COLOR_MASK_ALPHA) != 0) { if (sbit->alpha == 0 || sbit->alpha > png_ptr->usr_bit_depth) { @@ -1316,42 +1314,33 @@ png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type) #ifdef PNG_WRITE_cHRM_SUPPORTED /* Write the cHRM chunk */ void /* PRIVATE */ -png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x, - png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y, - png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x, - png_fixed_point blue_y) +png_write_cHRM_fixed(png_structrp png_ptr, const png_xy *xy) { png_byte buf[32]; png_debug(1, "in png_write_cHRM"); /* Each value is saved in 1/100,000ths */ -#ifdef PNG_CHECK_cHRM_SUPPORTED - if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y, - green_x, green_y, blue_x, blue_y)) -#endif - { - png_save_uint_32(buf, (png_uint_32)white_x); - png_save_uint_32(buf + 4, (png_uint_32)white_y); + png_save_int_32(buf, xy->whitex); + png_save_int_32(buf + 4, xy->whitey); - png_save_uint_32(buf + 8, (png_uint_32)red_x); - png_save_uint_32(buf + 12, (png_uint_32)red_y); + png_save_int_32(buf + 8, xy->redx); + png_save_int_32(buf + 12, xy->redy); - png_save_uint_32(buf + 16, (png_uint_32)green_x); - png_save_uint_32(buf + 20, (png_uint_32)green_y); + png_save_int_32(buf + 16, xy->greenx); + png_save_int_32(buf + 20, xy->greeny); - png_save_uint_32(buf + 24, (png_uint_32)blue_x); - png_save_uint_32(buf + 28, (png_uint_32)blue_y); + png_save_int_32(buf + 24, xy->bluex); + png_save_int_32(buf + 28, xy->bluey); - png_write_complete_chunk(png_ptr, png_cHRM, buf, (png_size_t)32); - } + png_write_complete_chunk(png_ptr, png_cHRM, buf, 32); } #endif #ifdef PNG_WRITE_tRNS_SUPPORTED /* Write the tRNS chunk */ void /* PRIVATE */ -png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, +png_write_tRNS(png_structrp png_ptr, png_const_bytep trans_alpha, png_const_color_16p tran, int num_trans, int color_type) { png_byte buf[6]; @@ -1362,7 +1351,8 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, { if (num_trans <= 0 || num_trans > (int)png_ptr->num_palette) { - png_warning(png_ptr, "Invalid number of transparent colors specified"); + png_app_warning(png_ptr, + "Invalid number of transparent colors specified"); return; } @@ -1373,10 +1363,10 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, else if (color_type == PNG_COLOR_TYPE_GRAY) { - /* One 16 bit value */ + /* One 16-bit value */ if (tran->gray >= (1 << png_ptr->bit_depth)) { - png_warning(png_ptr, + png_app_warning(png_ptr, "Ignoring attempt to write tRNS chunk out-of-range for bit_depth"); return; @@ -1388,17 +1378,17 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, else if (color_type == PNG_COLOR_TYPE_RGB) { - /* Three 16 bit values */ + /* Three 16-bit values */ png_save_uint_16(buf, tran->red); png_save_uint_16(buf + 2, tran->green); png_save_uint_16(buf + 4, tran->blue); #ifdef PNG_WRITE_16BIT_SUPPORTED - if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4])) + if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0) #else - if (buf[0] | buf[2] | buf[4]) + if ((buf[0] | buf[2] | buf[4]) != 0) #endif { - png_warning(png_ptr, + png_app_warning(png_ptr, "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8"); return; } @@ -1408,7 +1398,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, else { - png_warning(png_ptr, "Can't write tRNS with an alpha channel"); + png_app_warning(png_ptr, "Can't write tRNS with an alpha channel"); } } #endif @@ -1416,7 +1406,7 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha, #ifdef PNG_WRITE_bKGD_SUPPORTED /* Write the background chunk */ void /* PRIVATE */ -png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) +png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type) { png_byte buf[6]; @@ -1426,8 +1416,8 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) { if ( #ifdef PNG_MNG_FEATURES_SUPPORTED - (png_ptr->num_palette || - (!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE))) && + (png_ptr->num_palette != 0 || + (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0) && #endif back->index >= png_ptr->num_palette) { @@ -1439,15 +1429,15 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) png_write_complete_chunk(png_ptr, png_bKGD, buf, (png_size_t)1); } - else if (color_type & PNG_COLOR_MASK_COLOR) + else if ((color_type & PNG_COLOR_MASK_COLOR) != 0) { png_save_uint_16(buf, back->red); png_save_uint_16(buf + 2, back->green); png_save_uint_16(buf + 4, back->blue); #ifdef PNG_WRITE_16BIT_SUPPORTED - if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4])) + if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]) != 0) #else - if (buf[0] | buf[2] | buf[4]) + if ((buf[0] | buf[2] | buf[4]) != 0) #endif { png_warning(png_ptr, @@ -1478,7 +1468,7 @@ png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type) #ifdef PNG_WRITE_hIST_SUPPORTED /* Write the histogram */ void /* PRIVATE */ -png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist) +png_write_hIST(png_structrp png_ptr, png_const_uint_16p hist, int num_hist) { int i; png_byte buf[3]; @@ -1509,36 +1499,41 @@ png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist) #ifdef PNG_WRITE_tEXt_SUPPORTED /* Write a tEXt chunk */ void /* PRIVATE */ -png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text, +png_write_tEXt(png_structrp png_ptr, png_const_charp key, png_const_charp text, png_size_t text_len) { - png_size_t key_len; + png_uint_32 key_len; + png_byte new_key[80]; png_debug(1, "in png_write_tEXt"); - key_len = strlen(key); + key_len = png_check_keyword(png_ptr, key, new_key); + + if (key_len == 0) + png_error(png_ptr, "tEXt: invalid keyword"); if (text == NULL || *text == '\0') text_len = 0; else - text_len = png_strlen(text); + text_len = strlen(text); + + if (text_len > PNG_UINT_31_MAX - (key_len+1)) + png_error(png_ptr, "tEXt: text too long"); /* Make sure we include the 0 after the key */ png_write_chunk_header(png_ptr, png_tEXt, - (png_uint_32)(key_len + text_len + 1)); + (png_uint_32)/*checked above*/(key_len + text_len + 1)); /* * We leave it to the application to meet PNG-1.0 requirements on the * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. */ - png_write_chunk_data(png_ptr, (png_bytep)key, - (png_size_t)(key_len + 1)); + png_write_chunk_data(png_ptr, new_key, key_len + 1); if (text_len != 0) - png_write_chunk_data(png_ptr, (png_const_bytep)text, - (png_size_t)text_len); + png_write_chunk_data(png_ptr, (png_const_bytep)text, text_len); png_write_chunk_end(png_ptr); } @@ -1547,50 +1542,48 @@ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text, #ifdef PNG_WRITE_zTXt_SUPPORTED /* Write a compressed text chunk */ void /* PRIVATE */ -png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text, - png_size_t text_len, int compression) +png_write_zTXt(png_structrp png_ptr, png_const_charp key, png_const_charp text, + int compression) { - png_size_t key_len; - png_byte buf; + png_uint_32 key_len; + png_byte new_key[81]; compression_state comp; png_debug(1, "in png_write_zTXt"); - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - comp.input_len = 0; - - key_len = strlen(key); - - if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE) + if (compression == PNG_TEXT_COMPRESSION_NONE) { - png_write_tEXt(png_ptr, key, text, (png_size_t)0); + png_write_tEXt(png_ptr, key, text, 0); return; } - text_len = png_strlen(text); + if (compression != PNG_TEXT_COMPRESSION_zTXt) + png_error(png_ptr, "zTXt: invalid compression type"); + + key_len = png_check_keyword(png_ptr, key, new_key); + + if (key_len == 0) + png_error(png_ptr, "zTXt: invalid keyword"); + + /* Add the compression method and 1 for the keyword separator. */ + new_key[++key_len] = PNG_COMPRESSION_TYPE_BASE; + ++key_len; /* Compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression, - &comp); + png_text_compress_init(&comp, (png_const_bytep)text, + text == NULL ? 0 : strlen(text)); + + if (png_text_compress(png_ptr, png_zTXt, &comp, key_len) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); /* Write start of chunk */ - png_write_chunk_header(png_ptr, png_zTXt, - (png_uint_32)(key_len+text_len + 2)); + png_write_chunk_header(png_ptr, png_zTXt, key_len + comp.output_len); /* Write key */ - png_write_chunk_data(png_ptr, (png_bytep)key, - (png_size_t)(key_len + 1)); - - buf = (png_byte)compression; - - /* Write compression */ - png_write_chunk_data(png_ptr, &buf, (png_size_t)1); + png_write_chunk_data(png_ptr, new_key, key_len); /* Write the compressed data */ - png_write_compressed_data_out(png_ptr, &comp, text_len); + png_write_compressed_data_out(png_ptr, &comp); /* Close the chunk */ png_write_chunk_end(png_ptr); @@ -1600,84 +1593,98 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text, #ifdef PNG_WRITE_iTXt_SUPPORTED /* Write an iTXt chunk */ void /* PRIVATE */ -png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key, +png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key, png_const_charp lang, png_const_charp lang_key, png_const_charp text) { - png_size_t lang_len, key_len, lang_key_len, text_len; - png_byte cbuf[2]; + png_uint_32 key_len, prefix_len; + png_size_t lang_len, lang_key_len; + png_byte new_key[82]; compression_state comp; png_debug(1, "in png_write_iTXt"); - comp.num_output_ptr = 0; - comp.max_output_ptr = 0; - comp.output_ptr = NULL; - comp.input = NULL; - - key_len = png_strlen(key); + key_len = png_check_keyword(png_ptr, key, new_key); - if (lang == NULL) - lang_len = 0; + if (key_len == 0) + png_error(png_ptr, "iTXt: invalid keyword"); - else - lang_len = png_strlen(lang); + /* Set the compression flag */ + switch (compression) + { + case PNG_ITXT_COMPRESSION_NONE: + case PNG_TEXT_COMPRESSION_NONE: + compression = new_key[++key_len] = 0; /* no compression */ + break; - if (lang_key == NULL) - lang_key_len = 0; + case PNG_TEXT_COMPRESSION_zTXt: + case PNG_ITXT_COMPRESSION_zTXt: + compression = new_key[++key_len] = 1; /* compressed */ + break; - else - lang_key_len = png_strlen(lang_key); + default: + png_error(png_ptr, "iTXt: invalid compression"); + } - if (text == NULL) - text_len = 0; + new_key[++key_len] = PNG_COMPRESSION_TYPE_BASE; + ++key_len; /* for the keywod separator */ + /* We leave it to the application to meet PNG-1.0 requirements on the + * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of + * any non-Latin-1 characters except for NEWLINE. ISO PNG, however, + * specifies that the text is UTF-8 and this really doesn't require any + * checking. + * + * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. + * + * TODO: validate the language tag correctly (see the spec.) + */ + if (lang == NULL) lang = ""; /* empty language is valid */ + lang_len = strlen(lang)+1; + if (lang_key == NULL) lang_key = ""; /* may be empty */ + lang_key_len = strlen(lang_key)+1; + if (text == NULL) text = ""; /* may be empty */ + + prefix_len = key_len; + if (lang_len > PNG_UINT_31_MAX-prefix_len) + prefix_len = PNG_UINT_31_MAX; else - text_len = png_strlen(text); - - /* Compute the compressed data; do it now for the length */ - text_len = png_text_compress(png_ptr, text, text_len, compression - 2, - &comp); + prefix_len = (png_uint_32)(prefix_len + lang_len); + if (lang_key_len > PNG_UINT_31_MAX-prefix_len) + prefix_len = PNG_UINT_31_MAX; + else + prefix_len = (png_uint_32)(prefix_len + lang_key_len); - /* Make sure we include the compression flag, the compression byte, - * and the NULs after the key, lang, and lang_key parts - */ + png_text_compress_init(&comp, (png_const_bytep)text, strlen(text)); - png_write_chunk_header(png_ptr, png_iTXt, (png_uint_32)( - 5 /* comp byte, comp flag, terminators for key, lang and lang_key */ - + key_len - + lang_len - + lang_key_len - + text_len)); + if (compression != 0) + { + if (png_text_compress(png_ptr, png_iTXt, &comp, prefix_len) != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg); + } - /* We leave it to the application to meet PNG-1.0 requirements on the - * contents of the text. PNG-1.0 through PNG-1.2 discourage the use of - * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. - * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. - */ - png_write_chunk_data(png_ptr, (png_bytep)key, (png_size_t)(key_len + 1)); + else + { + if (comp.input_len > PNG_UINT_31_MAX-prefix_len) + png_error(png_ptr, "iTXt: uncompressed text too long"); - /* Set the compression flag */ - if (compression == PNG_ITXT_COMPRESSION_NONE || - compression == PNG_TEXT_COMPRESSION_NONE) - cbuf[0] = 0; + /* So the string will fit in a chunk: */ + comp.output_len = (png_uint_32)/*SAFE*/comp.input_len; + } - else /* compression == PNG_ITXT_COMPRESSION_zTXt */ - cbuf[0] = 1; + png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len); - /* Set the compression method */ - cbuf[1] = 0; + png_write_chunk_data(png_ptr, new_key, key_len); - png_write_chunk_data(png_ptr, cbuf, (png_size_t)2); + png_write_chunk_data(png_ptr, (png_const_bytep)lang, lang_len); - cbuf[0] = 0; - png_write_chunk_data(png_ptr, (lang ? (png_const_bytep)lang : cbuf), - (png_size_t)(lang_len + 1)); + png_write_chunk_data(png_ptr, (png_const_bytep)lang_key, lang_key_len); - png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf), - (png_size_t)(lang_key_len + 1)); + if (compression != 0) + png_write_compressed_data_out(png_ptr, &comp); - png_write_compressed_data_out(png_ptr, &comp, text_len); + else + png_write_chunk_data(png_ptr, (png_const_bytep)text, comp.output_len); png_write_chunk_end(png_ptr); } @@ -1686,7 +1693,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key, #ifdef PNG_WRITE_oFFs_SUPPORTED /* Write the oFFs chunk */ void /* PRIVATE */ -png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, +png_write_oFFs(png_structrp png_ptr, png_int_32 x_offset, png_int_32 y_offset, int unit_type) { png_byte buf[9]; @@ -1706,35 +1713,43 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, #ifdef PNG_WRITE_pCAL_SUPPORTED /* Write the pCAL chunk (described in the PNG extensions document) */ void /* PRIVATE */ -png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, +png_write_pCAL(png_structrp png_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_const_charp units, png_charpp params) { - png_size_t purpose_len, units_len, total_len; + png_uint_32 purpose_len; + png_size_t units_len, total_len; png_size_tp params_len; png_byte buf[10]; + png_byte new_purpose[80]; int i; png_debug1(1, "in png_write_pCAL (%d parameters)", nparams); if (type >= PNG_EQUATION_LAST) - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); + png_error(png_ptr, "Unrecognized equation type for pCAL chunk"); + + purpose_len = png_check_keyword(png_ptr, purpose, new_purpose); + + if (purpose_len == 0) + png_error(png_ptr, "pCAL: invalid keyword"); + + ++purpose_len; /* terminator */ - purpose_len = strlen(purpose) + 1; png_debug1(3, "pCAL purpose length = %d", (int)purpose_len); - units_len = png_strlen(units) + (nparams == 0 ? 0 : 1); + units_len = strlen(units) + (nparams == 0 ? 0 : 1); png_debug1(3, "pCAL units length = %d", (int)units_len); total_len = purpose_len + units_len + 10; params_len = (png_size_tp)png_malloc(png_ptr, - (png_alloc_size_t)(nparams * png_sizeof(png_size_t))); + (png_alloc_size_t)(nparams * (sizeof (png_size_t)))); /* Find the length of each parameter, making sure we don't count the * null terminator for the last parameter. */ for (i = 0; i < nparams; i++) { - params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1); + params_len[i] = strlen(params[i]) + (i == nparams - 1 ? 0 : 1); png_debug2(3, "pCAL parameter %d length = %lu", i, (unsigned long)params_len[i]); total_len += params_len[i]; @@ -1742,7 +1757,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, png_debug1(3, "pCAL total length = %d", (int)total_len); png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len); - png_write_chunk_data(png_ptr, (png_const_bytep)purpose, purpose_len); + png_write_chunk_data(png_ptr, new_purpose, purpose_len); png_save_int_32(buf, X0); png_save_int_32(buf + 4, X1); buf[8] = (png_byte)type; @@ -1763,7 +1778,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0, #ifdef PNG_WRITE_sCAL_SUPPORTED /* Write the sCAL chunk */ void /* PRIVATE */ -png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, +png_write_sCAL_s(png_structrp png_ptr, int unit, png_const_charp width, png_const_charp height) { png_byte buf[64]; @@ -1771,8 +1786,8 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, png_debug(1, "in png_write_sCAL_s"); - wlen = png_strlen(width); - hlen = png_strlen(height); + wlen = strlen(width); + hlen = strlen(height); total_len = wlen + hlen + 2; if (total_len > 64) @@ -1782,8 +1797,8 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, } buf[0] = (png_byte)unit; - png_memcpy(buf + 1, width, wlen + 1); /* Append the '\0' here */ - png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */ + memcpy(buf + 1, width, wlen + 1); /* Append the '\0' here */ + memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */ png_debug1(3, "sCAL total length = %u", (unsigned int)total_len); png_write_complete_chunk(png_ptr, png_sCAL, buf, total_len); @@ -1793,7 +1808,7 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width, #ifdef PNG_WRITE_pHYs_SUPPORTED /* Write the pHYs chunk */ void /* PRIVATE */ -png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, +png_write_pHYs(png_structrp png_ptr, png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, int unit_type) { @@ -1817,7 +1832,7 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit, * or png_convert_from_time_t(), or fill in the structure yourself. */ void /* PRIVATE */ -png_write_tIME(png_structp png_ptr, png_const_timep mod_time) +png_write_tIME(png_structrp png_ptr, png_const_timep mod_time) { png_byte buf[7]; @@ -1844,7 +1859,7 @@ png_write_tIME(png_structp png_ptr, png_const_timep mod_time) /* Initializes the row writing capability of libpng */ void /* PRIVATE */ -png_write_start_row(png_structp png_ptr) +png_write_start_row(png_structrp png_ptr) { #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ @@ -1865,6 +1880,10 @@ png_write_start_row(png_structp png_ptr) png_alloc_size_t buf_size; int usr_pixel_depth; +#ifdef PNG_WRITE_FILTER_SUPPORTED + png_byte filters; +#endif + png_debug(1, "in png_write_start_row"); usr_pixel_depth = png_ptr->usr_channels * png_ptr->usr_bit_depth; @@ -1875,56 +1894,61 @@ png_write_start_row(png_structp png_ptr) png_ptr->maximum_pixel_depth = (png_byte)usr_pixel_depth; /* Set up row buffer */ - png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, buf_size); + png_ptr->row_buf = png_voidcast(png_bytep, png_malloc(png_ptr, buf_size)); png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE; #ifdef PNG_WRITE_FILTER_SUPPORTED - /* Set up filtering buffer, if using this filter */ - if (png_ptr->do_filter & PNG_FILTER_SUB) - { - png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1); + filters = png_ptr->do_filter; - png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; - } + if (png_ptr->height == 1) + filters &= 0xff & ~(PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH); - /* We only need to keep the previous row if we are using one of these. */ - if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH)) + if (png_ptr->width == 1) + filters &= 0xff & ~(PNG_FILTER_SUB|PNG_FILTER_AVG|PNG_FILTER_PAETH); + + if (filters == 0) + filters = PNG_FILTER_NONE; + + png_ptr->do_filter = filters; + + if (((filters & (PNG_FILTER_SUB | PNG_FILTER_UP | PNG_FILTER_AVG | + PNG_FILTER_PAETH)) != 0) && png_ptr->try_row == NULL) { - /* Set up previous row buffer */ - png_ptr->prev_row = (png_bytep)png_calloc(png_ptr, buf_size); + int num_filters = 0; - if (png_ptr->do_filter & PNG_FILTER_UP) - { - png_ptr->up_row = (png_bytep)png_malloc(png_ptr, - png_ptr->rowbytes + 1); + png_ptr->try_row = png_voidcast(png_bytep, png_malloc(png_ptr, buf_size)); - png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; - } + if (filters & PNG_FILTER_SUB) + num_filters++; - if (png_ptr->do_filter & PNG_FILTER_AVG) - { - png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, - png_ptr->rowbytes + 1); + if (filters & PNG_FILTER_UP) + num_filters++; - png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; - } + if (filters & PNG_FILTER_AVG) + num_filters++; - if (png_ptr->do_filter & PNG_FILTER_PAETH) - { - png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, - png_ptr->rowbytes + 1); + if (filters & PNG_FILTER_PAETH) + num_filters++; - png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; - } + if (num_filters > 1) + png_ptr->tst_row = png_voidcast(png_bytep, png_malloc(png_ptr, + buf_size)); } -#endif /* PNG_WRITE_FILTER_SUPPORTED */ + + /* We only need to keep the previous row if we are using one of the following + * filters. + */ + if ((filters & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH)) != 0) + png_ptr->prev_row = png_voidcast(png_bytep, + png_calloc(png_ptr, buf_size)); +#endif /* WRITE_FILTER */ #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* If interlaced, we need to set up width and height of pass */ - if (png_ptr->interlaced) + if (png_ptr->interlaced != 0) { - if (!(png_ptr->transformations & PNG_INTERLACE)) + if ((png_ptr->transformations & PNG_INTERLACE) == 0) { png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - png_pass_ystart[0]) / png_pass_yinc[0]; @@ -1946,15 +1970,11 @@ png_write_start_row(png_structp png_ptr) png_ptr->num_rows = png_ptr->height; png_ptr->usr_width = png_ptr->width; } - - png_zlib_claim(png_ptr, PNG_ZLIB_FOR_IDAT); - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_out = png_ptr->zbuf; } /* Internal use only. Called when finished processing a row of data. */ void /* PRIVATE */ -png_write_finish_row(png_structp png_ptr) +png_write_finish_row(png_structrp png_ptr) { #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ @@ -1972,8 +1992,6 @@ png_write_finish_row(png_structp png_ptr) static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; #endif - int ret; - png_debug(1, "in png_write_finish_row"); /* Next row */ @@ -1985,10 +2003,10 @@ png_write_finish_row(png_structp png_ptr) #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* If interlaced, go to next pass */ - if (png_ptr->interlaced) + if (png_ptr->interlaced != 0) { png_ptr->row_number = 0; - if (png_ptr->transformations & PNG_INTERLACE) + if ((png_ptr->transformations & PNG_INTERLACE) != 0) { png_ptr->pass++; } @@ -2013,7 +2031,7 @@ png_write_finish_row(png_structp png_ptr) png_pass_ystart[png_ptr->pass]) / png_pass_yinc[png_ptr->pass]; - if (png_ptr->transformations & PNG_INTERLACE) + if ((png_ptr->transformations & PNG_INTERLACE) != 0) break; } while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0); @@ -2024,7 +2042,7 @@ png_write_finish_row(png_structp png_ptr) if (png_ptr->pass < 7) { if (png_ptr->prev_row != NULL) - png_memset(png_ptr->prev_row, 0, + memset(png_ptr->prev_row, 0, (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels* png_ptr->usr_bit_depth, png_ptr->width)) + 1); @@ -2035,42 +2053,7 @@ png_write_finish_row(png_structp png_ptr) /* If we get here, we've just written the last row, so we need to flush the compressor */ - do - { - /* Tell the compressor we are done */ - ret = deflate(&png_ptr->zstream, Z_FINISH); - - /* Check for an error */ - if (ret == Z_OK) - { - /* Check to see if we need more room */ - if (!(png_ptr->zstream.avail_out)) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - } - - else if (ret != Z_STREAM_END) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - } while (ret != Z_STREAM_END); - - /* Write any extra space */ - if (png_ptr->zstream.avail_out < png_ptr->zbuf_size) - { - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size - - png_ptr->zstream.avail_out); - } - - png_zlib_release(png_ptr); - png_ptr->zstream.data_type = Z_BINARY; + png_compress_IDAT(png_ptr, NULL, 0, Z_FINISH); } #ifdef PNG_WRITE_INTERLACING_SUPPORTED @@ -2104,7 +2087,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) { png_bytep sp; png_bytep dp; - int shift; + unsigned int shift; int d; int value; png_uint_32 i; @@ -2142,7 +2125,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) { png_bytep sp; png_bytep dp; - int shift; + unsigned int shift; int d; int value; png_uint_32 i; @@ -2179,7 +2162,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) { png_bytep sp; png_bytep dp; - int shift; + unsigned int shift; int d; int value; png_uint_32 i; @@ -2234,7 +2217,7 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) /* Move the pixel */ if (dp != sp) - png_memcpy(dp, sp, pixel_bytes); + memcpy(dp, sp, pixel_bytes); /* Next pixel */ dp += pixel_bytes; @@ -2254,25 +2237,171 @@ png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass) } #endif + /* This filters the row, chooses which filter to use, if it has not already * been specified by the application, and then writes the row out with the * chosen filter. */ -static void png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, +static void /* PRIVATE */ +png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row, png_size_t row_bytes); -#define PNG_MAXSUM (((png_uint_32)(-1)) >> 1) -#define PNG_HISHIFT 10 -#define PNG_LOMASK ((png_uint_32)0xffffL) -#define PNG_HIMASK ((png_uint_32)(~PNG_LOMASK >> PNG_HISHIFT)) +#ifdef PNG_WRITE_FILTER_SUPPORTED +static png_size_t /* PRIVATE */ +png_setup_sub_row(png_structrp png_ptr, const png_uint_32 bpp, + const png_size_t row_bytes, const png_size_t lmins) +{ + png_bytep rp, dp, lp; + png_size_t i; + png_size_t sum = 0; + int v; + + png_ptr->try_row[0] = PNG_FILTER_VALUE_SUB; + + for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1; i < bpp; + i++, rp++, dp++) + { + v = *dp = *rp; + sum += (v < 128) ? v : 256 - v; + } + + for (lp = png_ptr->row_buf + 1; i < row_bytes; + i++, rp++, lp++, dp++) + { + v = *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); + sum += (v < 128) ? v : 256 - v; + + if (sum > lmins) /* We are already worse, don't continue. */ + break; + } + + return (sum); +} + +static png_size_t /* PRIVATE */ +png_setup_up_row(png_structrp png_ptr, const png_size_t row_bytes, + const png_size_t lmins) +{ + png_bytep rp, dp, pp; + png_size_t i; + png_size_t sum = 0; + int v; + + png_ptr->try_row[0] = PNG_FILTER_VALUE_UP; + + for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1, + pp = png_ptr->prev_row + 1; i < row_bytes; + i++, rp++, pp++, dp++) + { + v = *dp = (png_byte)(((int)*rp - (int)*pp) & 0xff); + sum += (v < 128) ? v : 256 - v; + + if (sum > lmins) /* We are already worse, don't continue. */ + break; + } + + return (sum); +} + +static png_size_t /* PRIVATE */ +png_setup_avg_row(png_structrp png_ptr, const png_uint_32 bpp, + const png_size_t row_bytes, const png_size_t lmins) +{ + png_bytep rp, dp, pp, lp; + png_uint_32 i; + png_size_t sum = 0; + int v; + + png_ptr->try_row[0] = PNG_FILTER_VALUE_AVG; + + for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1, + pp = png_ptr->prev_row + 1; i < bpp; i++) + { + v = *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); + + sum += (v < 128) ? v : 256 - v; + } + + for (lp = png_ptr->row_buf + 1; i < row_bytes; i++) + { + v = *dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) + & 0xff); + + sum += (v < 128) ? v : 256 - v; + + if (sum > lmins) /* We are already worse, don't continue. */ + break; + } + + return (sum); +} + +static png_size_t /* PRIVATE */ +png_setup_paeth_row(png_structrp png_ptr, const png_uint_32 bpp, + const png_size_t row_bytes, const png_size_t lmins) +{ + png_bytep rp, dp, pp, cp, lp; + png_size_t i; + png_size_t sum = 0; + int v; + + png_ptr->try_row[0] = PNG_FILTER_VALUE_PAETH; + + for (i = 0, rp = png_ptr->row_buf + 1, dp = png_ptr->try_row + 1, + pp = png_ptr->prev_row + 1; i < bpp; i++) + { + v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); + + sum += (v < 128) ? v : 256 - v; + } + + for (lp = png_ptr->row_buf + 1, cp = png_ptr->prev_row + 1; i < row_bytes; + i++) + { + int a, b, c, pa, pb, pc, p; + + b = *pp++; + c = *cp++; + a = *lp++; + + p = b - c; + pc = a - c; + +#ifdef PNG_USE_ABS + pa = abs(p); + pb = abs(pc); + pc = abs(p + pc); +#else + pa = p < 0 ? -p : p; + pb = pc < 0 ? -pc : pc; + pc = (p + pc) < 0 ? -(p + pc) : p + pc; +#endif + + p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; + + v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff); + + sum += (v < 128) ? v : 256 - v; + + if (sum > lmins) /* We are already worse, don't continue. */ + break; + } + + return (sum); +} +#endif /* WRITE_FILTER */ + void /* PRIVATE */ -png_write_find_filter(png_structp png_ptr, png_row_infop row_info) +png_write_find_filter(png_structrp png_ptr, png_row_infop row_info) { - png_bytep best_row; -#ifdef PNG_WRITE_FILTER_SUPPORTED - png_bytep prev_row, row_buf; - png_uint_32 mins, bpp; +#ifndef PNG_WRITE_FILTER_SUPPORTED + png_write_filtered_row(png_ptr, png_ptr->row_buf, row_info->rowbytes+1); +#else png_byte filter_to_do = png_ptr->do_filter; + png_bytep row_buf; + png_bytep best_row; + png_uint_32 bpp; + png_size_t mins; png_size_t row_bytes = row_info->rowbytes; png_debug(1, "in png_write_find_filter"); @@ -2280,12 +2409,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) /* Find out how many bytes offset each pixel is */ bpp = (row_info->pixel_depth + 7) >> 3; - prev_row = png_ptr->prev_row; -#endif - best_row = png_ptr->row_buf; -#ifdef PNG_WRITE_FILTER_SUPPORTED - row_buf = best_row; - mins = PNG_MAXSUM; + row_buf = png_ptr->row_buf; + mins = PNG_SIZE_MAX - 256/* so we can detect potential overflow of the + running sum */; /* The prediction method we use is to find which method provides the * smallest value when summing the absolute values of the distances @@ -2315,17 +2441,35 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) /* We don't need to test the 'no filter' case if this is the only filter * that has been chosen, as it doesn't actually do anything to the data. */ - if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE) + best_row = png_ptr->row_buf; + + + if ((filter_to_do & PNG_FILTER_NONE) != 0 && filter_to_do != PNG_FILTER_NONE) { png_bytep rp; - png_uint_32 sum = 0; + png_size_t sum = 0; png_size_t i; int v; - for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++) + if (PNG_SIZE_MAX/128 <= row_bytes) + { + for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++) + { + /* Check for overflow */ + if (sum > PNG_SIZE_MAX/128 - 256) + break; + + v = *rp; + sum += (v < 128) ? v : 256 - v; + } + } + else /* Overflow is not possible */ { - v = *rp; - sum += (v < 128) ? v : 256 - v; + for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++) + { + v = *rp; + sum += (v < 128) ? v : 256 - v; + } } mins = sum; @@ -2335,325 +2479,125 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info) if (filter_to_do == PNG_FILTER_SUB) /* It's the only filter so no testing is needed */ { - png_bytep rp, lp, dp; - png_size_t i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; - i++, rp++, dp++) - { - *dp = *rp; - } - - for (lp = row_buf + 1; i < row_bytes; - i++, rp++, lp++, dp++) - { - *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); - } - - best_row = png_ptr->sub_row; + (void) png_setup_sub_row(png_ptr, bpp, row_bytes, mins); + best_row = png_ptr->try_row; } - else if (filter_to_do & PNG_FILTER_SUB) + else if ((filter_to_do & PNG_FILTER_SUB) != 0) { - png_bytep rp, dp, lp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; + png_size_t sum; + png_size_t lmins = mins; - for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; - i++, rp++, dp++) - { - v = *dp = *rp; - - sum += (v < 128) ? v : 256 - v; - } - - for (lp = row_buf + 1; i < row_bytes; - i++, rp++, lp++, dp++) - { - v = *dp = (png_byte)(((int)*rp - (int)*lp) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } + sum = png_setup_sub_row(png_ptr, bpp, row_bytes, lmins); if (sum < mins) { mins = sum; - best_row = png_ptr->sub_row; + best_row = png_ptr->try_row; + if (png_ptr->tst_row != NULL) + { + png_ptr->try_row = png_ptr->tst_row; + png_ptr->tst_row = best_row; + } } } /* Up filter */ if (filter_to_do == PNG_FILTER_UP) { - png_bytep rp, dp, pp; - png_size_t i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; - i++, rp++, pp++, dp++) - { - *dp = (png_byte)(((int)*rp - (int)*pp) & 0xff); - } - - best_row = png_ptr->up_row; + (void) png_setup_up_row(png_ptr, row_bytes, mins); + best_row = png_ptr->try_row; } - else if (filter_to_do & PNG_FILTER_UP) + else if ((filter_to_do & PNG_FILTER_UP) != 0) { - png_bytep rp, dp, pp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, - pp = prev_row + 1; i < row_bytes; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - - sum += (v < 128) ? v : 256 - v; + png_size_t sum; + png_size_t lmins = mins; - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } + sum = png_setup_up_row(png_ptr, row_bytes, lmins); if (sum < mins) { mins = sum; - best_row = png_ptr->up_row; + best_row = png_ptr->try_row; + if (png_ptr->tst_row != NULL) + { + png_ptr->try_row = png_ptr->tst_row; + png_ptr->tst_row = best_row; + } } } /* Avg filter */ if (filter_to_do == PNG_FILTER_AVG) { - png_bytep rp, dp, pp, lp; - png_uint_32 i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); - } - - for (lp = row_buf + 1; i < row_bytes; i++) - { - *dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) - & 0xff); - } - best_row = png_ptr->avg_row; + (void) png_setup_avg_row(png_ptr, bpp, row_bytes, mins); + best_row = png_ptr->try_row; } - else if (filter_to_do & PNG_FILTER_AVG) + else if ((filter_to_do & PNG_FILTER_AVG) != 0) { - png_bytep rp, dp, pp, lp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff); + png_size_t sum; + png_size_t lmins = mins; - sum += (v < 128) ? v : 256 - v; - } - - for (lp = row_buf + 1; i < row_bytes; i++) - { - v = *dp++ = - (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } + sum= png_setup_avg_row(png_ptr, bpp, row_bytes, lmins); if (sum < mins) { mins = sum; - best_row = png_ptr->avg_row; + best_row = png_ptr->try_row; + if (png_ptr->tst_row != NULL) + { + png_ptr->try_row = png_ptr->tst_row; + png_ptr->tst_row = best_row; + } } } /* Paeth filter */ - if (filter_to_do == PNG_FILTER_PAETH) + if ((filter_to_do == PNG_FILTER_PAETH) != 0) { - png_bytep rp, dp, pp, cp, lp; - png_size_t i; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - } - - for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++) - { - int a, b, c, pa, pb, pc, p; - - b = *pp++; - c = *cp++; - a = *lp++; - - p = b - c; - pc = a - c; - -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; - - *dp++ = (png_byte)(((int)*rp++ - p) & 0xff); - } - best_row = png_ptr->paeth_row; + (void) png_setup_paeth_row(png_ptr, bpp, row_bytes, mins); + best_row = png_ptr->try_row; } - else if (filter_to_do & PNG_FILTER_PAETH) + else if ((filter_to_do & PNG_FILTER_PAETH) != 0) { - png_bytep rp, dp, pp, cp, lp; - png_uint_32 sum = 0, lmins = mins; - png_size_t i; - int v; - - for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, - pp = prev_row + 1; i < bpp; i++) - { - v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff); - - sum += (v < 128) ? v : 256 - v; - } - - for (lp = row_buf + 1, cp = prev_row + 1; i < row_bytes; i++) - { - int a, b, c, pa, pb, pc, p; + png_size_t sum; + png_size_t lmins = mins; - b = *pp++; - c = *cp++; - a = *lp++; - -#ifndef PNG_SLOW_PAETH - p = b - c; - pc = a - c; -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; -#else /* PNG_SLOW_PAETH */ - p = a + b - c; - pa = abs(p - a); - pb = abs(p - b); - pc = abs(p - c); - - if (pa <= pb && pa <= pc) - p = a; - - else if (pb <= pc) - p = b; - - else - p = c; -#endif /* PNG_SLOW_PAETH */ - - v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff); - - sum += (v < 128) ? v : 256 - v; - - if (sum > lmins) /* We are already worse, don't continue. */ - break; - } + sum = png_setup_paeth_row(png_ptr, bpp, row_bytes, lmins); if (sum < mins) { - best_row = png_ptr->paeth_row; + best_row = png_ptr->try_row; + if (png_ptr->tst_row != NULL) + { + png_ptr->try_row = png_ptr->tst_row; + png_ptr->tst_row = best_row; + } } } -#endif /* PNG_WRITE_FILTER_SUPPORTED */ /* Do the actual writing of the filtered row data from the chosen filter. */ png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1); + +#endif /* WRITE_FILTER */ } + /* Do the actual writing of a previously filtered row. */ static void -png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, - png_size_t avail/*includes filter byte*/) +png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row, + png_size_t full_row_length/*includes filter byte*/) { png_debug(1, "in png_write_filtered_row"); png_debug1(2, "filter = %d", filtered_row[0]); - /* Set up the zlib input buffer */ - - png_ptr->zstream.next_in = filtered_row; - png_ptr->zstream.avail_in = 0; - /* Repeat until we have compressed all the data */ - do - { - int ret; /* Return of zlib */ - - /* Record the number of bytes available - zlib supports at least 65535 - * bytes at one step, depending on the size of the zlib type 'uInt', the - * maximum size zlib can write at once is ZLIB_IO_MAX (from pngpriv.h). - * Use this because on 16 bit systems 'rowbytes' can be up to 65536 (i.e. - * one more than 16 bits) and, in this case 'rowbytes+1' can overflow a - * uInt. ZLIB_IO_MAX can be safely reduced to cause zlib to be called - * with smaller chunks of data. - */ - if (png_ptr->zstream.avail_in == 0) - { - if (avail > ZLIB_IO_MAX) - { - png_ptr->zstream.avail_in = ZLIB_IO_MAX; - avail -= ZLIB_IO_MAX; - } - - else - { - /* So this will fit in the available uInt space: */ - png_ptr->zstream.avail_in = (uInt)avail; - avail = 0; - } - } - - /* Compress the data */ - ret = deflate(&png_ptr->zstream, Z_NO_FLUSH); - /* Check for compression errors */ - if (ret != Z_OK) - { - if (png_ptr->zstream.msg != NULL) - png_error(png_ptr, png_ptr->zstream.msg); - - else - png_error(png_ptr, "zlib error"); - } - - /* See if it is time to write another IDAT */ - if (!(png_ptr->zstream.avail_out)) - { - /* Write the IDAT and reset the zlib output buffer */ - png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } - /* Repeat until all data has been compressed */ - } while (avail > 0 || png_ptr->zstream.avail_in > 0); + png_compress_IDAT(png_ptr, filtered_row, full_row_length, Z_NO_FLUSH); +#ifdef PNG_WRITE_FILTER_SUPPORTED /* Swap the current and previous rows */ if (png_ptr->prev_row != NULL) { @@ -2663,6 +2607,7 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, png_ptr->prev_row = png_ptr->row_buf; png_ptr->row_buf = tptr; } +#endif /* WRITE_FILTER */ /* Finish row - updates counters and flushes zlib if last row */ png_write_finish_row(png_ptr); @@ -2675,6 +2620,6 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, { png_write_flush(png_ptr); } -#endif +#endif /* WRITE_FLUSH */ } -#endif /* PNG_WRITE_SUPPORTED */ +#endif /* WRITE */ Binary files differBinary files differdiff --git a/modules/gdscript/gd_parser.cpp b/modules/gdscript/gd_parser.cpp index ac96a2117c..3ef42f81a4 100644 --- a/modules/gdscript/gd_parser.cpp +++ b/modules/gdscript/gd_parser.cpp @@ -1069,8 +1069,8 @@ GDParser::Node* GDParser::_parse_expression(Node *p_parent,bool p_static,bool p_ // can be followed by an unary op in a valid combination, // due to how precedence works, unaries will always dissapear first - _set_error("Parser bug.."); - + _set_error("Unexpected two consecutive operators."); + return NULL; } diff --git a/platform/android/export/export.cpp b/platform/android/export/export.cpp index b8c44a4fc8..872f047c95 100644 --- a/platform/android/export/export.cpp +++ b/platform/android/export/export.cpp @@ -822,40 +822,6 @@ void EditorExportPlatformAndroid::_fix_manifest(Vector<uint8_t>& p_manifest,bool }*/ } - if (tname=="application" && /*nspace=="android" &&*/ attrname=="label") { - - print_line("FOUND application"); - if (attr_value==0xFFFFFFFF) { - WARN_PRINT("Application name in a resource, should be plaintext (but you can ignore this).") - } else { - - String aname = get_project_name(); - string_table[attr_value]=aname; - } - } - if (tname=="activity" && /*nspace=="android" &&*/ attrname=="label") { - - print_line("FOUND activity name"); - if (attr_value==0xFFFFFFFF) { - WARN_PRINT("Activity name in a resource, should be plaintext (but you can ignore this)") - } else { - String aname; - if (this->name!="") { - aname=this->name; - } else { - aname = Globals::get_singleton()->get("application/name"); - - } - - if (aname=="") { - aname=_MKSTR(VERSION_NAME); - } - - print_line("APP NAME IS..."+aname); - string_table[attr_value]=aname; - } - } - if (tname=="uses-permission" && /*nspace=="android" &&*/ attrname=="name") { if (value.begins_with("godot.custom")) { @@ -880,13 +846,11 @@ void EditorExportPlatformAndroid::_fix_manifest(Vector<uint8_t>& p_manifest,bool if (tname=="supports-screens" ) { - if (attr_value==0xFFFFFFFF) { - WARN_PRINT("Screen res name in a resource, should be plaintext") - } else if (attrname=="smallScreens") { + if (attrname=="smallScreens") { encode_uint32(screen_support[SCREEN_SMALL]?0xFFFFFFFF:0,&p_manifest[iofs+16]); - } else if (attrname=="mediumScreens") { + } else if (attrname=="normalScreens") { encode_uint32(screen_support[SCREEN_NORMAL]?0xFFFFFFFF:0,&p_manifest[iofs+16]); diff --git a/platform/android/java/res/drawable-hdpi/notify_panel_notification_icon_bg.png b/platform/android/java/res/drawable-hdpi/notify_panel_notification_icon_bg.png Binary files differindex f5b762ecf3..94bc406416 100644 --- a/platform/android/java/res/drawable-hdpi/notify_panel_notification_icon_bg.png +++ b/platform/android/java/res/drawable-hdpi/notify_panel_notification_icon_bg.png diff --git a/platform/android/java/res/drawable-mdpi/notify_panel_notification_icon_bg.png b/platform/android/java/res/drawable-mdpi/notify_panel_notification_icon_bg.png Binary files differindex 9ecb8af06c..ef6fe4e836 100644 --- a/platform/android/java/res/drawable-mdpi/notify_panel_notification_icon_bg.png +++ b/platform/android/java/res/drawable-mdpi/notify_panel_notification_icon_bg.png diff --git a/platform/android/java/res/drawable/icon.png b/platform/android/java/res/drawable/icon.png Binary files differindex e334f5fa78..a0a0f4af25 100644 --- a/platform/android/java/res/drawable/icon.png +++ b/platform/android/java/res/drawable/icon.png diff --git a/platform/android/java/res/values-id/strings.xml b/platform/android/java/res/values-in/strings.xml index 9e9a8b0c03..9e9a8b0c03 100644 --- a/platform/android/java/res/values-id/strings.xml +++ b/platform/android/java/res/values-in/strings.xml diff --git a/platform/android/java/res/values-he/strings.xml b/platform/android/java/res/values-iw/strings.xml index f52ede2085..f52ede2085 100644 --- a/platform/android/java/res/values-he/strings.xml +++ b/platform/android/java/res/values-iw/strings.xml diff --git a/platform/android/logo.png b/platform/android/logo.png Binary files differindex a7e2c6f130..fcf684c026 100644 --- a/platform/android/logo.png +++ b/platform/android/logo.png diff --git a/platform/bb10/bar/icon.png b/platform/bb10/bar/icon.png Binary files differindex a837c8009a..2161402438 100644 --- a/platform/bb10/bar/icon.png +++ b/platform/bb10/bar/icon.png diff --git a/platform/bb10/logo.png b/platform/bb10/logo.png Binary files differindex d0fb1966ae..abf0d2cc69 100644 --- a/platform/bb10/logo.png +++ b/platform/bb10/logo.png diff --git a/platform/haiku/logo.png b/platform/haiku/logo.png Binary files differindex 42d7728da8..d5d98e4cc6 100644 --- a/platform/haiku/logo.png +++ b/platform/haiku/logo.png diff --git a/platform/iphone/detect.py b/platform/iphone/detect.py index c3ee098350..9cb52d4561 100644 --- a/platform/iphone/detect.py +++ b/platform/iphone/detect.py @@ -22,8 +22,7 @@ def get_opts(): return [ ('IPHONEPLATFORM', 'name of the iphone platform', 'iPhoneOS'), ('IPHONEPATH', 'the path to iphone toolchain', '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain'), - ('IOS_SDK_VERSION', 'The SDK version', 'iPhoneOS'), - ('IPHONESDK', 'path to the iphone SDK', '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/${IOS_SDK_VERSION}.sdk/'), + ('IPHONESDK', 'path to the iphone SDK', '/Applications/Xcode.app/Contents/Developer/Platforms/${IPHONEPLATFORM}.platform/Developer/SDKs/${IPHONEPLATFORM}.sdk/'), ('game_center', 'Support for game center', 'yes'), ('store_kit', 'Support for in-app store', 'yes'), ('icloud', 'Support for iCloud', 'yes'), @@ -31,6 +30,7 @@ def get_opts(): ('ios_appirater', 'Enable Appirater', 'no'), ('ios_exceptions', 'Use exceptions when compiling on playbook', 'yes'), ('ios_triple', 'Triple for ios toolchain', ''), + ('ios_sim', 'Build simulator binary', 'no'), ] def get_flags(): @@ -45,27 +45,53 @@ def get_flags(): def configure(env): - env.Append(CPPPATH=['#platform/iphone', '#platform/iphone/include']) + env.Append(CPPPATH=['#platform/iphone']) env['ENV']['PATH'] = env['IPHONEPATH']+"/Developer/usr/bin/:"+env['ENV']['PATH'] -# env['CC'] = '$IPHONEPATH/Developer/usr/bin/gcc' -# env['CXX'] = '$IPHONEPATH/Developer/usr/bin/g++' env['CC'] = '$IPHONEPATH/usr/bin/${ios_triple}clang' env['CXX'] = '$IPHONEPATH/usr/bin/${ios_triple}clang++' env['AR'] = '$IPHONEPATH/usr/bin/${ios_triple}ar' env['RANLIB'] = '$IPHONEPATH/usr/bin/${ios_triple}ranlib' import string - if (env["bits"]=="64"): - #env['CCFLAGS'] = string.split('-arch arm64 -fmessage-length=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -Wno-trigraphs -fpascal-strings -O0 -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-return-type -Wno-non-virtual-dtor -Wno-overloaded-virtual -Wno-exit-time-destructors -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wno-unused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-bool-conversion -Wno-enum-conversion -Wshorten-64-to-32 -Wno-newline-eof -Wno-c++11-extensions -fstrict-aliasing -Wdeprecated-declarations -Winvalid-offsetof -g -Wno-sign-conversion -miphoneos-version-min=5.1.1 -Wmost -Wno-four-char-constants -Wno-unknown-pragmas -Wno-invalid-offsetof -ffast-math -m64 -DDEBUG -D_DEBUG -MMD -MT dependencies -isysroot $IPHONESDK') + if (env["ios_sim"]=="yes" or env["arch"] == "x86"): # i386, simulator + env["arch"]="x86" + env["bits"]="32" + env['CCFLAGS'] = string.split('-arch i386 -fobjc-abi-version=2 -fobjc-legacy-dispatch -fmessage-length=0 -fpascal-strings -fasm-blocks -Wall -D__IPHONE_OS_VERSION_MIN_REQUIRED=40100 -isysroot $IPHONESDK -mios-simulator-version-min=4.3 -DCUSTOM_MATRIX_TRANSFORM_H=\\\"build/iphone/matrix4_iphone.h\\\" -DCUSTOM_VECTOR3_TRANSFORM_H=\\\"build/iphone/vector3_iphone.h\\\"') + elif (env["arch"]=="arm64"): # arm64 + env["bits"] = "64" env['CCFLAGS'] = string.split('-fno-objc-arc -arch arm64 -fmessage-length=0 -fno-strict-aliasing -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -Wno-trigraphs -fpascal-strings -Wmissing-prototypes -Wreturn-type -Wparentheses -Wswitch -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-shorten-64-to-32 -fvisibility=hidden -Wno-sign-conversion -MMD -MT dependencies -miphoneos-version-min=5.1.1 -isysroot $IPHONESDK') env.Append(CPPFLAGS=['-DNEED_LONG_INT']) env.Append(CPPFLAGS=['-DLIBYUV_DISABLE_NEON']) - else: + else: # armv7 + env["arch"] = "arm" + env["bits"] = "32" env['CCFLAGS'] = string.split('-fno-objc-arc -arch armv7 -fmessage-length=0 -fno-strict-aliasing -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -Wno-trigraphs -fpascal-strings -Wmissing-prototypes -Wreturn-type -Wparentheses -Wswitch -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-shorten-64-to-32 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk -fvisibility=hidden -Wno-sign-conversion -mthumb "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -miphoneos-version-min=5.1.1 -MMD -MT dependencies -isysroot $IPHONESDK') - if (env["bits"]=="64"): + if (env["arch"]=="x86"): + env['IPHONEPLATFORM'] = 'iPhoneSimulator' + env.Append(LINKFLAGS=['-arch', 'i386', '-mios-simulator-version-min=4.3', + '-isysroot', '$IPHONESDK', + #'-mmacosx-version-min=10.6', + '-Xlinker', + '-objc_abi_version', + '-Xlinker', '2', + '-framework', 'AudioToolbox', + '-framework', 'AVFoundation', + '-framework', 'CoreAudio', + '-framework', 'CoreGraphics', + '-framework', 'CoreMedia', + '-framework', 'Foundation', + '-framework', 'Security', + '-framework', 'UIKit', + '-framework', 'MediaPlayer', + '-framework', 'OpenGLES', + '-framework', 'QuartzCore', + '-framework', 'SystemConfiguration', + '-F$IPHONESDK', + ]) + elif (env["arch"]=="arm64"): env.Append(LINKFLAGS=['-arch', 'arm64', '-Wl,-dead_strip', '-miphoneos-version-min=5.1.1', '-isysroot', '$IPHONESDK', #'-stdlib=libc++', @@ -134,13 +160,16 @@ def configure(env): env.Append(CCFLAGS=['-g','-pg', '-Os']) env.Append(LINKFLAGS=['-pg']) - + if (env["ios_sim"]=="yes"): #TODO: Check if needed? + env['ENV']['MACOSX_DEPLOYMENT_TARGET'] = '10.6' env['ENV']['CODESIGN_ALLOCATE'] = '/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate' env.Append(CPPFLAGS=['-DIPHONE_ENABLED', '-DUNIX_ENABLED', '-DGLES2_ENABLED', '-DMPC_FIXED_POINT']) if(env["opus"]=="yes"): env.opus_fixed_point="yes" - if(env["bits"]=="64"): + if env["arch"]=="x86": + pass + elif(env["arch"]=="arm64"): env.Append(CFLAGS=["-DOPUS_ARM64_OPT"]) else: env.Append(CFLAGS=["-DOPUS_ARM_OPT"]) @@ -156,5 +185,3 @@ def configure(env): env.Append( BUILDERS = { 'GLSL120' : env.Builder(action = methods.build_legacygl_headers, suffix = 'glsl.h',src_suffix = '.glsl') } ) env.Append( BUILDERS = { 'GLSL' : env.Builder(action = methods.build_glsl_headers, suffix = 'glsl.h',src_suffix = '.glsl') } ) env.Append( BUILDERS = { 'GLSL120GLES' : env.Builder(action = methods.build_gles2_headers, suffix = 'glsl.h',src_suffix = '.glsl') } ) - - diff --git a/platform/iphone/logo.png b/platform/iphone/logo.png Binary files differindex d1851d7a5e..8dd718524c 100644 --- a/platform/iphone/logo.png +++ b/platform/iphone/logo.png diff --git a/platform/iphone/xcode/godot_xcode/godot_ios/Default-568h@2x~iphone.png b/platform/iphone/xcode/godot_xcode/godot_ios/Default-568h@2x~iphone.png Binary files differindex 1341174454..1d5e472665 100644 --- a/platform/iphone/xcode/godot_xcode/godot_ios/Default-568h@2x~iphone.png +++ b/platform/iphone/xcode/godot_xcode/godot_ios/Default-568h@2x~iphone.png diff --git a/platform/iphone/xcode/godot_xcode/godot_ios/Default-667h.png b/platform/iphone/xcode/godot_xcode/godot_ios/Default-667h.png Binary files differindex c480d2e3c0..b13a399c83 100644 --- a/platform/iphone/xcode/godot_xcode/godot_ios/Default-667h.png +++ b/platform/iphone/xcode/godot_xcode/godot_ios/Default-667h.png diff --git 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b/platform/iphone/xcode/godot_xcode/godot_ios/Images.xcassets/AppIcon.appiconset/icon-87.png Binary files differindex e54cee23a6..e9b2429754 100644 --- a/platform/iphone/xcode/godot_xcode/godot_ios/Images.xcassets/AppIcon.appiconset/icon-87.png +++ b/platform/iphone/xcode/godot_xcode/godot_ios/Images.xcassets/AppIcon.appiconset/icon-87.png diff --git a/platform/isim/SCsub b/platform/isim/SCsub deleted file mode 100644 index 8a46565e7e..0000000000 --- a/platform/isim/SCsub +++ /dev/null @@ -1,38 +0,0 @@ -Import('env') - -iphone_lib = [ - - '#platform/iphone/os_iphone.cpp', - #'#platform/iphone/rasterizer_iphone.cpp', - '#platform/iphone/audio_driver_iphone.cpp', - '#platform/iphone/sem_iphone.cpp', - '#platform/iphone/gl_view.mm', - '#platform/iphone/main.m', - '#platform/iphone/app_delegate.mm', - '#platform/iphone/view_controller.mm', - '#platform/iphone/game_center.mm', - '#platform/iphone/in_app_store.mm', - '#platform/iphone/icloud.mm', - #'#platform/iphone/Appirater.m', - '#platform/iphone/ios.mm', -] - -#env.Depends('#core/math/vector3.h', 'vector3_psp.h') - -#iphone_lib = env.Library('iphone', iphone_lib) - -env_ios = env.Clone(); - - -if env['ios_gles22_override'] == "yes": - env_ios.Append(CPPFLAGS=['-DGLES2_OVERRIDE']) - - -#if env['ios_appirater'] == "yes": -# env_ios.Append(CPPFLAGS=['-DAPPIRATER_ENABLED']) - - -obj = env_ios.Object('#platform/iphone/godot_iphone.cpp') - -prog = None -prog = env_ios.Program('#bin/godot', [obj] + iphone_lib) diff --git a/platform/isim/detect.py b/platform/isim/detect.py deleted file mode 100644 index 809b0ac368..0000000000 --- a/platform/isim/detect.py +++ /dev/null @@ -1,105 +0,0 @@ -import os -import sys - - -def is_active(): - return False - -def get_name(): - return "iSIM" - - -def can_build(): - - import sys - if sys.platform == 'darwin': - return True - - return False - -def get_opts(): - - return [ - ('ISIMPLATFORM', 'name of the iphone platform', 'iPhoneSimulator'), - ('ISIMPATH', 'the path to iphone toolchain', '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain'), - ('ISIMSDK', 'path to the iphone SDK', '/Applications/Xcode.app/Contents/Developer/Platforms/${ISIMPLATFORM}.platform/Developer/SDKs/${ISIMPLATFORM}.sdk'), - ('game_center', 'Support for game center', 'yes'), - ('store_kit', 'Support for in-app store', 'yes'), - ('ios_gles22_override', 'Force GLES2.0 on iOS', 'yes'), - ('ios_GLES1_override', 'Force legacy GLES (1.1) on iOS', 'no'), - ('ios_appirater', 'Enable Appirater', 'no'), - ('ios_exceptions', 'Use exceptions when compiling on playbook', 'no'), - ] - -def get_flags(): - - return [ - ('tools', 'yes'), - ('webp', 'yes'), - ] - - - -def configure(env): - - env.Append(CPPPATH=['#platform/iphone']) - - env['ENV']['PATH'] = env['ISIMPATH']+"/Developer/usr/bin/:"+env['ENV']['PATH'] - - env['CC'] = '$ISIMPATH/usr/bin/${ios_triple}clang' - env['CXX'] = '$ISIMPATH/usr/bin/${ios_triple}clang++' - env['AR'] = '$ISIMPATH/usr/bin/${ios_triple}ar' - env['RANLIB'] = '$ISIMPATH/usr/bin/${ios_triple}ranlib' - - import string - env['CCFLAGS'] = string.split('-arch i386 -fobjc-abi-version=2 -fobjc-legacy-dispatch -fmessage-length=0 -fpascal-strings -fasm-blocks -Wall -D__IPHONE_OS_VERSION_MIN_REQUIRED=40100 -isysroot $ISIMSDK -mios-simulator-version-min=4.3 -DCUSTOM_MATRIX_TRANSFORM_H=\\\"build/iphone/matrix4_iphone.h\\\" -DCUSTOM_VECTOR3_TRANSFORM_H=\\\"build/iphone/vector3_iphone.h\\\"') - - env.Append(LINKFLAGS=['-arch', 'i386', - '-mios-simulator-version-min=4.3', - '-isysroot', '$ISIMSDK', - #'-mmacosx-version-min=10.6', - '-Xlinker', - '-objc_abi_version', - '-Xlinker', '2', - '-framework', 'AudioToolbox', - '-framework', 'AVFoundation', - '-framework', 'CoreAudio', - '-framework', 'CoreGraphics', - '-framework', 'CoreMedia', - '-framework', 'Foundation', - '-framework', 'Security', - '-framework', 'UIKit', - '-framework', 'MediaPlayer', - '-framework', 'OpenGLES', - '-framework', 'QuartzCore', - '-framework', 'SystemConfiguration', - '-F$ISIMSDK', - ]) - - env.Append(CPPPATH = ['$ISIMSDK/System/Library/Frameworks/OpenGLES.framework/Headers']) - - if (env["target"]=="release"): - - env.Append(CCFLAGS=['-O3', '-ffast-math']) - env.Append(LINKFLAGS=['-O3', '-ffast-math']) - - elif (env["target"]=="debug"): - - env.Append(CCFLAGS=['-DDEBUG', '-D_DEBUG', '-gdwarf-2', '-Wall', '-O0', '-DDEBUG_ENABLED']) - env.Append(CPPFLAGS=['-DDEBUG_MEMORY_ALLOC']) - - elif (env["target"]=="profile"): - - env.Append(CCFLAGS=['-g','-pg']) - env.Append(LINKFLAGS=['-pg']) - - - env['ENV']['MACOSX_DEPLOYMENT_TARGET'] = '10.6' - env['ENV']['CODESIGN_ALLOCATE'] = '/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate' - env.Append(CPPFLAGS=['-DIPHONE_ENABLED', '-DUNIX_ENABLED', '-DGLES2_ENABLED', '-fexceptions']) - - import methods - env.Append( BUILDERS = { 'GLSL120' : env.Builder(action = methods.build_legacygl_headers, suffix = 'glsl.h',src_suffix = '.glsl') } ) - env.Append( BUILDERS = { 'GLSL' : env.Builder(action = methods.build_glsl_headers, suffix = 'glsl.h',src_suffix = '.glsl') } ) - env.Append( BUILDERS = { 'GLSL120GLES' : env.Builder(action = methods.build_gles2_headers, suffix = 'glsl.h',src_suffix = '.glsl') } ) - diff --git a/platform/javascript/audio_server_javascript.cpp b/platform/javascript/audio_server_javascript.cpp index 9f82f084e5..71a7e77266 100644 --- a/platform/javascript/audio_server_javascript.cpp +++ b/platform/javascript/audio_server_javascript.cpp @@ -116,7 +116,7 @@ void AudioServerJavascript::sample_set_data(RID p_sample, const DVector<uint8_t> } -const DVector<uint8_t> AudioServerJavascript::sample_get_data(RID p_sample) const{ +DVector<uint8_t> AudioServerJavascript::sample_get_data(RID p_sample) const{ return DVector<uint8_t>(); diff --git a/platform/javascript/audio_server_javascript.h b/platform/javascript/audio_server_javascript.h index bb9a91f78a..e27192cd93 100644 --- a/platform/javascript/audio_server_javascript.h +++ b/platform/javascript/audio_server_javascript.h @@ -132,7 +132,7 @@ public: virtual void sample_set_data(RID p_sample, const DVector<uint8_t>& p_buffer); - virtual const DVector<uint8_t> sample_get_data(RID p_sample) const; + virtual DVector<uint8_t> sample_get_data(RID p_sample) const; virtual void sample_set_mix_rate(RID p_sample,int p_rate); virtual int sample_get_mix_rate(RID p_sample) const; diff --git a/platform/javascript/logo.png b/platform/javascript/logo.png Binary files differindex 07e0a41292..ce911180ac 100644 --- a/platform/javascript/logo.png +++ b/platform/javascript/logo.png diff --git a/platform/osx/logo.png b/platform/osx/logo.png Binary files differindex 2bcd3aa72e..93c6890e85 100644 --- a/platform/osx/logo.png +++ b/platform/osx/logo.png diff --git a/platform/osx/os_osx.h b/platform/osx/os_osx.h index 8d64686335..e1c33cb018 100644 --- a/platform/osx/os_osx.h +++ b/platform/osx/os_osx.h @@ -142,6 +142,8 @@ public: virtual String get_name(); + virtual void alert(const String& p_alert, const String& p_title="ALERT!"); + virtual void set_cursor_shape(CursorShape p_shape); virtual void set_mouse_show(bool p_show); diff --git a/platform/osx/os_osx.mm b/platform/osx/os_osx.mm index b5503fcd73..45c500ec39 100644 --- a/platform/osx/os_osx.mm +++ b/platform/osx/os_osx.mm @@ -1209,6 +1209,22 @@ String OS_OSX::get_name() { return "OSX"; } +void OS_OSX::alert(const String& p_alert, const String& p_title) { + // Set OS X-compliant variables + NSAlert *window = [[NSAlert alloc] init]; + NSString *ns_title = [NSString stringWithUTF8String:p_title.utf8().get_data()]; + NSString *ns_alert = [NSString stringWithUTF8String:p_alert.utf8().get_data()]; + + [window addButtonWithTitle:@"OK"]; + [window setMessageText:ns_title]; + [window setInformativeText:ns_alert]; + [window setAlertStyle:NSWarningAlertStyle]; + + // Display it, then release + [window runModal]; + [window release]; +} + void OS_OSX::set_cursor_shape(CursorShape p_shape) { if (cursor_shape==p_shape) diff --git a/platform/server/logo.png b/platform/server/logo.png Binary files differindex 6b7490097f..5e98ac26ec 100644 --- a/platform/server/logo.png +++ b/platform/server/logo.png diff --git a/platform/windows/godot.manifest b/platform/windows/godot.manifest new file mode 100644 index 0000000000..c095f007b0 --- /dev/null +++ b/platform/windows/godot.manifest @@ -0,0 +1,24 @@ +<?xml version="1.0" encoding="UTF-8" standalone="yes"?> +<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3"> + <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3"> + <security> + <requestedPrivileges> + <requestedExecutionLevel level="asInvoker" uiAccess="false"/> + </requestedPrivileges> + </security> + </trustInfo> + <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1"> + <application> + <!-- Windows 10 --> + <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/> + <!-- Windows 8.1 --> + <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/> + <!-- Windows 8 --> + <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/> + <!-- Windows 7 --> + <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/> + <!-- Windows Vista --> + <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/> + </application> + </compatibility> +</assembly> diff --git a/platform/windows/godot_res.rc b/platform/windows/godot_res.rc index 5f1e951e0f..d069ecdc79 100644 --- a/platform/windows/godot_res.rc +++ b/platform/windows/godot_res.rc @@ -1,3 +1,4 @@ +#include <winuser.h> #include "core/version.h" #ifndef _STR #define _STR(m_x) #m_x @@ -6,6 +7,8 @@ GODOT_ICON ICON platform/windows/godot.ico +CREATEPROCESS_MANIFEST_RESOURCE_ID RT_MANIFEST platform/windows/godot.manifest + 1 VERSIONINFO FILEVERSION VERSION_MAJOR,VERSION_MINOR,0,0 PRODUCTVERSION VERSION_MAJOR,VERSION_MINOR,0,0 diff --git a/platform/windows/logo.png b/platform/windows/logo.png Binary files differindex a27e14dde8..4376abd563 100644 --- a/platform/windows/logo.png +++ b/platform/windows/logo.png diff --git a/platform/winrt/logo.png b/platform/winrt/logo.png Binary files differindex a27e14dde8..4376abd563 100644 --- a/platform/winrt/logo.png +++ b/platform/winrt/logo.png diff --git a/platform/x11/logo.png b/platform/x11/logo.png Binary files differindex c40214d6de..1cc93b46ac 100644 --- a/platform/x11/logo.png +++ b/platform/x11/logo.png diff --git a/scene/2d/canvas_item.cpp b/scene/2d/canvas_item.cpp index eb37634b24..976a5c4f1e 100644 --- a/scene/2d/canvas_item.cpp +++ b/scene/2d/canvas_item.cpp @@ -1023,7 +1023,7 @@ void CanvasItem::_bind_methods() { ObjectTypeDB::bind_method(_MD("_is_visible_"),&CanvasItem::_is_visible_); ObjectTypeDB::bind_method(_MD("edit_set_state","state"),&CanvasItem::edit_set_state); - ObjectTypeDB::bind_method(_MD("edit_get"),&CanvasItem::edit_get_state); + ObjectTypeDB::bind_method(_MD("edit_get_state:Variant"),&CanvasItem::edit_get_state); ObjectTypeDB::bind_method(_MD("edit_set_rect","rect"),&CanvasItem::edit_set_rect); ObjectTypeDB::bind_method(_MD("edit_rotate","degrees"),&CanvasItem::edit_rotate); diff --git a/scene/gui/base_button.cpp b/scene/gui/base_button.cpp index bc498f47bc..d7632b14b8 100644 --- a/scene/gui/base_button.cpp +++ b/scene/gui/base_button.cpp @@ -225,11 +225,21 @@ void BaseButton::_notification(int p_what) { status.hovering=false; update(); } + if (p_what==NOTIFICATION_DRAG_BEGIN) { + + if (status.press_attempt) { + status.press_attempt=false; + status.pressing_button=0; + update(); + } + } + if (p_what==NOTIFICATION_FOCUS_EXIT) { if (status.pressing_button && status.press_attempt) { status.press_attempt=false; status.pressing_button=0; + update(); } } diff --git a/scene/gui/control.cpp b/scene/gui/control.cpp index edc8a8bcb8..2e28baa137 100644 --- a/scene/gui/control.cpp +++ b/scene/gui/control.cpp @@ -2460,8 +2460,8 @@ void Control::_bind_methods() { ADD_PROPERTY( PropertyInfo(Variant::BOOL,"focus/ignore_mouse"), _SCS("set_ignore_mouse"),_SCS("is_ignoring_mouse") ); ADD_PROPERTY( PropertyInfo(Variant::BOOL,"focus/stop_mouse"), _SCS("set_stop_mouse"),_SCS("is_stopping_mouse") ); - ADD_PROPERTYNZ( PropertyInfo(Variant::INT,"size_flags/horizontal", PROPERTY_HINT_FLAGS, "Expand,Fill"), _SCS("set_h_size_flags"),_SCS("get_h_size_flags") ); - ADD_PROPERTYNZ( PropertyInfo(Variant::INT,"size_flags/vertical", PROPERTY_HINT_FLAGS, "Expand,Fill"), _SCS("set_v_size_flags"),_SCS("get_v_size_flags") ); + ADD_PROPERTY( PropertyInfo(Variant::INT,"size_flags/horizontal", PROPERTY_HINT_FLAGS, "Expand,Fill"), _SCS("set_h_size_flags"),_SCS("get_h_size_flags") ); + ADD_PROPERTY( PropertyInfo(Variant::INT,"size_flags/vertical", PROPERTY_HINT_FLAGS, "Expand,Fill"), _SCS("set_v_size_flags"),_SCS("get_v_size_flags") ); ADD_PROPERTYNO( PropertyInfo(Variant::INT,"size_flags/stretch_ratio", PROPERTY_HINT_RANGE, "1,128,0.01"), _SCS("set_stretch_ratio"),_SCS("get_stretch_ratio") ); ADD_PROPERTYNZ( PropertyInfo(Variant::OBJECT,"theme/theme", PROPERTY_HINT_RESOURCE_TYPE, "Theme"), _SCS("set_theme"),_SCS("get_theme") ); diff --git a/scene/gui/line_edit.cpp b/scene/gui/line_edit.cpp index 52ef57cf1c..579a6e2f0a 100644 --- a/scene/gui/line_edit.cpp +++ b/scene/gui/line_edit.cpp @@ -31,6 +31,9 @@ #include "os/os.h" #include "print_string.h" #include "label.h" +#ifdef TOOLS_ENABLED +#include "tools/editor/editor_settings.h" +#endif static bool _is_text_char(CharType c) { @@ -57,6 +60,7 @@ void LineEdit::_input_event(InputEvent p_event) { if (b.button_index!=BUTTON_LEFT) break; + _reset_caret_blink_timer(); if (b.pressed) { shift_selection_check_pre(b.mod.shift); @@ -227,7 +231,7 @@ void LineEdit::_input_event(InputEvent p_event) { } } - + _reset_caret_blink_timer(); if (!k.mod.meta) { bool handled=true; @@ -294,6 +298,9 @@ void LineEdit::_input_event(InputEvent p_event) { } case KEY_LEFT: { +#ifndef APPLE_STYLE_KEYS + if (!k.mod.alt) +#endif shift_selection_check_pre(k.mod.shift); #ifdef APPLE_STYLE_KEYS @@ -543,14 +550,37 @@ void LineEdit::drop_data(const Point2& p_point,const Variant& p_data){ void LineEdit::_notification(int p_what) { switch(p_what) { +#ifdef TOOLS_ENABLED + case NOTIFICATION_ENTER_TREE: { + if (get_tree()->is_editor_hint()) { + cursor_set_blink_enabled(EDITOR_DEF("text_editor/caret_blink", false)); + cursor_set_blink_speed(EDITOR_DEF("text_editor/caret_blink_speed", 0.65)); + EditorSettings::get_singleton()->connect("settings_changed",this,"_editor_settings_changed"); + } + } break; +#endif case NOTIFICATION_RESIZED: { set_cursor_pos( get_cursor_pos() ); } break; + case MainLoop::NOTIFICATION_WM_FOCUS_IN: { + window_has_focus = true; + draw_caret = true; + update(); + } break; + case MainLoop::NOTIFICATION_WM_FOCUS_OUT: { + window_has_focus = false; + draw_caret = false; + update(); + } break; case NOTIFICATION_DRAW: { + if ((!has_focus() && !menu->has_focus()) || !window_has_focus) { + draw_caret = false; + } + int width,height; Size2 size=get_size(); @@ -627,21 +657,26 @@ void LineEdit::_notification(int p_what) { font->draw_char(ci, Point2(x_ofs, y_ofs + font_ascent), cchar, next, selected ? font_color_selected : font_color); - if (char_ofs==cursor_pos && has_focus()) + if (char_ofs==cursor_pos && draw_caret) { VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2( Point2( x_ofs , y_ofs ), Size2( 1, y_area ) ), cursor_color ); + } x_ofs+=char_width; char_ofs++; } - if (char_ofs==cursor_pos && has_focus()) //may be at the end + if (char_ofs==cursor_pos && draw_caret) {//may be at the end VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2( Point2( x_ofs , y_ofs ), Size2( 1, y_area ) ), cursor_color ); - + } } break; case NOTIFICATION_FOCUS_ENTER: { + if (!caret_blink_enabled) { + draw_caret = true; + } + if (OS::get_singleton()->has_virtual_keyboard()) OS::get_singleton()->show_virtual_keyboard(get_text(),get_global_rect()); @@ -788,6 +823,45 @@ void LineEdit::set_cursor_at_pixel_pos(int p_x) { } +bool LineEdit::cursor_get_blink_enabled() const { + return caret_blink_enabled; +} + +void LineEdit::cursor_set_blink_enabled(const bool p_enabled) { + caret_blink_enabled = p_enabled; + if (p_enabled) { + caret_blink_timer->start(); + } else { + caret_blink_timer->stop(); + } + draw_caret = true; +} + +float LineEdit::cursor_get_blink_speed() const { + return caret_blink_timer->get_wait_time(); +} + +void LineEdit::cursor_set_blink_speed(const float p_speed) { + ERR_FAIL_COND(p_speed <= 0); + caret_blink_timer->set_wait_time(p_speed); +} + +void LineEdit::_reset_caret_blink_timer() { + if (caret_blink_enabled) { + caret_blink_timer->stop(); + caret_blink_timer->start(); + draw_caret = true; + update(); + } + } + +void LineEdit::_toggle_draw_caret() { + draw_caret = !draw_caret; + if (is_visible()) { + update(); + } +} + void LineEdit::delete_char() { if ((text.length()<=0) || (cursor_pos==0)) return; @@ -1126,8 +1200,21 @@ PopupMenu *LineEdit::get_menu() const { return menu; } +#ifdef TOOLS_ENABLED + void LineEdit::_editor_settings_changed() { + cursor_set_blink_enabled(EDITOR_DEF("text_editor/caret_blink", false)); + cursor_set_blink_speed(EDITOR_DEF("text_editor/caret_blink_speed", 0.65)); + } +#endif + void LineEdit::_bind_methods() { + ObjectTypeDB::bind_method(_MD("_toggle_draw_caret"),&LineEdit::_toggle_draw_caret); + +#ifdef TOOLS_ENABLED + ObjectTypeDB::bind_method("_editor_settings_changed",&LineEdit::_editor_settings_changed); +#endif + ObjectTypeDB::bind_method(_MD("set_align", "align"), &LineEdit::set_align); ObjectTypeDB::bind_method(_MD("get_align"), &LineEdit::get_align); @@ -1138,6 +1225,10 @@ void LineEdit::_bind_methods() { ObjectTypeDB::bind_method(_MD("get_text"),&LineEdit::get_text); ObjectTypeDB::bind_method(_MD("set_cursor_pos","pos"),&LineEdit::set_cursor_pos); ObjectTypeDB::bind_method(_MD("get_cursor_pos"),&LineEdit::get_cursor_pos); + ObjectTypeDB::bind_method(_MD("cursor_set_blink_enabled", "enable"),&LineEdit::cursor_set_blink_enabled); + ObjectTypeDB::bind_method(_MD("cursor_get_blink_enabled"),&LineEdit::cursor_get_blink_enabled); + ObjectTypeDB::bind_method(_MD("cursor_set_blink_speed", "blink_speed"),&LineEdit::cursor_set_blink_speed); + ObjectTypeDB::bind_method(_MD("cursor_get_blink_speed"),&LineEdit::cursor_get_blink_speed); ObjectTypeDB::bind_method(_MD("set_max_length","chars"),&LineEdit::set_max_length); ObjectTypeDB::bind_method(_MD("get_max_length"),&LineEdit::get_max_length); ObjectTypeDB::bind_method(_MD("append_at_cursor","text"),&LineEdit::append_at_cursor); @@ -1171,7 +1262,8 @@ void LineEdit::_bind_methods() { ADD_PROPERTYNO( PropertyInfo( Variant::BOOL, "editable" ), _SCS("set_editable"),_SCS("is_editable") ); ADD_PROPERTYNZ( PropertyInfo( Variant::BOOL, "secret" ), _SCS("set_secret"),_SCS("is_secret") ); ADD_PROPERTY( PropertyInfo( Variant::INT,"focus_mode", PROPERTY_HINT_ENUM, "None,Click,All" ), _SCS("set_focus_mode"), _SCS("get_focus_mode") ); - + ADD_PROPERTY(PropertyInfo(Variant::BOOL, "caret/caret_blink"), _SCS("cursor_set_blink_enabled"), _SCS("cursor_get_blink_enabled"));; + ADD_PROPERTYNZ(PropertyInfo(Variant::REAL, "caret/caret_blink_speed",PROPERTY_HINT_RANGE,"0.1,10,0.1"), _SCS("cursor_set_blink_speed"),_SCS("cursor_get_blink_speed") ); } LineEdit::LineEdit() { @@ -1180,6 +1272,7 @@ LineEdit::LineEdit() { cached_width = 0; cursor_pos=0; window_pos=0; + window_has_focus=true; max_length = 0; pass=false; @@ -1189,6 +1282,13 @@ LineEdit::LineEdit() { set_default_cursor_shape(CURSOR_IBEAM); set_stop_mouse(true); + draw_caret=true; + caret_blink_enabled=false; + caret_blink_timer = memnew(Timer); + add_child(caret_blink_timer); + caret_blink_timer->set_wait_time(0.65); + caret_blink_timer->connect("timeout", this,"_toggle_draw_caret"); + cursor_set_blink_enabled(false); menu = memnew( PopupMenu ); add_child(menu); diff --git a/scene/gui/line_edit.h b/scene/gui/line_edit.h index ce3958db02..e4da0f0b87 100644 --- a/scene/gui/line_edit.h +++ b/scene/gui/line_edit.h @@ -87,6 +87,11 @@ private: bool drag_attempt; } selection; + Timer *caret_blink_timer; + bool caret_blink_enabled; + bool draw_caret; + bool window_has_focus; + void shift_selection_check_pre(bool); void shift_selection_check_post(bool); @@ -97,10 +102,15 @@ private: void set_cursor_at_pixel_pos(int p_x); + void _reset_caret_blink_timer(); + void _toggle_draw_caret(); + void clear_internal(); void changed_internal(); - +#ifdef TOOLS_ENABLED + void _editor_settings_changed(); +#endif void _input_event(InputEvent p_event); void _notification(int p_what); @@ -132,6 +142,12 @@ public: void append_at_cursor(String p_text); void clear(); + bool cursor_get_blink_enabled() const; + void cursor_set_blink_enabled(const bool p_enabled); + + float cursor_get_blink_speed() const; + void cursor_set_blink_speed(const float p_speed); + void copy_text(); void cut_text(); void paste_text(); diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp index 9342d077eb..6fd6137ac8 100644 --- a/scene/gui/text_edit.cpp +++ b/scene/gui/text_edit.cpp @@ -2065,6 +2065,12 @@ void TextEdit::_input_event(const InputEvent& p_input_event) { if (k.mod.shift) _pre_shift_selection(); +#ifdef APPLE_STYLE_KEYS + else +#else + else if (!k.mod.alt) +#endif + deselect(); #ifdef APPLE_STYLE_KEYS if (k.mod.command) { @@ -2118,6 +2124,12 @@ void TextEdit::_input_event(const InputEvent& p_input_event) { if (k.mod.shift) _pre_shift_selection(); +#ifdef APPLE_STYLE_KEYS + else +#else + else if (!k.mod.alt) +#endif + deselect(); #ifdef APPLE_STYLE_KEYS if (k.mod.command) { diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp index a1df7062ea..3c52af1c1e 100644 --- a/scene/main/viewport.cpp +++ b/scene/main/viewport.cpp @@ -1933,7 +1933,6 @@ void Viewport::_gui_input_event(InputEvent p_event) { } - if (over!=gui.mouse_over) { if (gui.mouse_over) diff --git a/scene/resources/default_theme/arrow_down.png b/scene/resources/default_theme/arrow_down.png Binary files differindex fc837d120a..b65549d175 100644 --- a/scene/resources/default_theme/arrow_down.png +++ b/scene/resources/default_theme/arrow_down.png diff --git a/scene/resources/default_theme/arrow_right.png b/scene/resources/default_theme/arrow_right.png Binary files differindex ebe6e26ace..b926ca4e42 100644 --- a/scene/resources/default_theme/arrow_right.png +++ b/scene/resources/default_theme/arrow_right.png diff --git a/scene/resources/default_theme/background.png b/scene/resources/default_theme/background.png Binary files differindex 1e4f198c0c..03cfab1de3 100644 --- a/scene/resources/default_theme/background.png +++ b/scene/resources/default_theme/background.png diff --git a/scene/resources/default_theme/base_green.png b/scene/resources/default_theme/base_green.png Binary files differindex 9b270ccd23..d03d6f08d8 100644 --- a/scene/resources/default_theme/base_green.png +++ 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839f555c3a..ce727d56e1 100644 --- a/scene/resources/default_theme/option_button_disabled.png +++ b/scene/resources/default_theme/option_button_disabled.png diff --git a/scene/resources/default_theme/option_button_focus.png b/scene/resources/default_theme/option_button_focus.png Binary files differindex bea1d17e71..c76d91287e 100644 --- a/scene/resources/default_theme/option_button_focus.png +++ b/scene/resources/default_theme/option_button_focus.png diff --git a/scene/resources/default_theme/option_button_hover.png b/scene/resources/default_theme/option_button_hover.png Binary files differindex a10d0a3753..fd1e987ceb 100644 --- a/scene/resources/default_theme/option_button_hover.png +++ b/scene/resources/default_theme/option_button_hover.png diff --git a/scene/resources/default_theme/option_button_normal.png b/scene/resources/default_theme/option_button_normal.png Binary files differindex cc0aa6a00f..9d7fb98d1c 100644 --- a/scene/resources/default_theme/option_button_normal.png +++ 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files differindex d2245e071b..611d949380 100644 --- a/scene/resources/default_theme/popup_bg_disabled.png +++ b/scene/resources/default_theme/popup_bg_disabled.png diff --git a/scene/resources/default_theme/popup_checked.png b/scene/resources/default_theme/popup_checked.png Binary files differindex a24e0543c0..087dfa117c 100644 --- a/scene/resources/default_theme/popup_checked.png +++ b/scene/resources/default_theme/popup_checked.png diff --git a/scene/resources/default_theme/popup_hover.png b/scene/resources/default_theme/popup_hover.png Binary files differindex de2bba3bb2..85d4e48475 100644 --- a/scene/resources/default_theme/popup_hover.png +++ b/scene/resources/default_theme/popup_hover.png diff --git a/scene/resources/default_theme/popup_unchecked.png b/scene/resources/default_theme/popup_unchecked.png Binary files differindex 88dfe19dcf..c1137e6fbf 100644 --- a/scene/resources/default_theme/popup_unchecked.png +++ b/scene/resources/default_theme/popup_unchecked.png diff --git a/scene/resources/default_theme/popup_window.png b/scene/resources/default_theme/popup_window.png Binary files differindex c897ada988..59362a8ffd 100644 --- a/scene/resources/default_theme/popup_window.png +++ b/scene/resources/default_theme/popup_window.png diff --git a/scene/resources/default_theme/progress_bar.png b/scene/resources/default_theme/progress_bar.png Binary files differindex 3016c52216..bf81e3adea 100644 --- a/scene/resources/default_theme/progress_bar.png +++ b/scene/resources/default_theme/progress_bar.png diff --git a/scene/resources/default_theme/progress_fill.png b/scene/resources/default_theme/progress_fill.png Binary files differindex ee7c3315e4..3a34dfdda6 100644 --- a/scene/resources/default_theme/progress_fill.png +++ b/scene/resources/default_theme/progress_fill.png diff --git a/scene/resources/default_theme/radio_checked.png b/scene/resources/default_theme/radio_checked.png Binary files differindex ada8dde3c1..95d472022f 100644 --- a/scene/resources/default_theme/radio_checked.png +++ b/scene/resources/default_theme/radio_checked.png diff --git a/scene/resources/default_theme/radio_unchecked.png b/scene/resources/default_theme/radio_unchecked.png Binary files differindex 018af99afd..7f0535c3a4 100644 --- a/scene/resources/default_theme/radio_unchecked.png +++ b/scene/resources/default_theme/radio_unchecked.png diff --git a/scene/resources/default_theme/reference_border.png b/scene/resources/default_theme/reference_border.png Binary files differindex f9dcfc7a4d..96219676bf 100644 --- a/scene/resources/default_theme/reference_border.png +++ b/scene/resources/default_theme/reference_border.png diff --git a/scene/resources/default_theme/scroll_bg.png b/scene/resources/default_theme/scroll_bg.png Binary files differindex e1e419d663..cefadb2c08 100644 --- a/scene/resources/default_theme/scroll_bg.png +++ b/scene/resources/default_theme/scroll_bg.png diff --git a/scene/resources/default_theme/scroll_button_down.png b/scene/resources/default_theme/scroll_button_down.png Binary files differindex 88b218f581..caeac9b286 100644 --- a/scene/resources/default_theme/scroll_button_down.png +++ b/scene/resources/default_theme/scroll_button_down.png diff --git a/scene/resources/default_theme/scroll_button_down_hl.png b/scene/resources/default_theme/scroll_button_down_hl.png Binary files differindex 90b1a48ac8..48036e0297 100644 --- a/scene/resources/default_theme/scroll_button_down_hl.png +++ b/scene/resources/default_theme/scroll_button_down_hl.png diff --git a/scene/resources/default_theme/scroll_button_left.png b/scene/resources/default_theme/scroll_button_left.png Binary files differindex 8e60a96476..3b50938d97 100644 --- a/scene/resources/default_theme/scroll_button_left.png +++ b/scene/resources/default_theme/scroll_button_left.png diff --git a/scene/resources/default_theme/scroll_button_left_hl.png b/scene/resources/default_theme/scroll_button_left_hl.png Binary files differindex 1114a92381..b3d348c24f 100644 --- a/scene/resources/default_theme/scroll_button_left_hl.png +++ b/scene/resources/default_theme/scroll_button_left_hl.png diff --git a/scene/resources/default_theme/scroll_button_right.png b/scene/resources/default_theme/scroll_button_right.png Binary files differindex ee79c0aa56..1c622a41ad 100644 --- a/scene/resources/default_theme/scroll_button_right.png +++ b/scene/resources/default_theme/scroll_button_right.png diff --git a/scene/resources/default_theme/scroll_button_right_hl.png b/scene/resources/default_theme/scroll_button_right_hl.png Binary files differindex b83e24a954..108796ca02 100644 --- a/scene/resources/default_theme/scroll_button_right_hl.png +++ b/scene/resources/default_theme/scroll_button_right_hl.png diff --git a/scene/resources/default_theme/scroll_button_up.png b/scene/resources/default_theme/scroll_button_up.png Binary files differindex 251106b487..2c8238ae4c 100644 --- a/scene/resources/default_theme/scroll_button_up.png +++ b/scene/resources/default_theme/scroll_button_up.png diff --git a/scene/resources/default_theme/scroll_button_up_hl.png b/scene/resources/default_theme/scroll_button_up_hl.png Binary files differindex 059b4b0f2b..4283bd114a 100644 --- a/scene/resources/default_theme/scroll_button_up_hl.png +++ b/scene/resources/default_theme/scroll_button_up_hl.png diff --git a/scene/resources/default_theme/scroll_grabber.png b/scene/resources/default_theme/scroll_grabber.png Binary files differindex 3a193e5448..1d625a9b7b 100644 --- a/scene/resources/default_theme/scroll_grabber.png +++ b/scene/resources/default_theme/scroll_grabber.png diff --git a/scene/resources/default_theme/scroll_grabber_hl.png b/scene/resources/default_theme/scroll_grabber_hl.png Binary files differindex 82c94c03c8..99eb24b7e7 100644 --- a/scene/resources/default_theme/scroll_grabber_hl.png +++ b/scene/resources/default_theme/scroll_grabber_hl.png diff --git a/scene/resources/default_theme/selection.png b/scene/resources/default_theme/selection.png Binary files differindex 3b1c810c40..501877a8b4 100644 --- a/scene/resources/default_theme/selection.png +++ b/scene/resources/default_theme/selection.png diff --git a/scene/resources/default_theme/selection_oof.png b/scene/resources/default_theme/selection_oof.png Binary files differindex e8680128cd..9594fe0913 100644 --- a/scene/resources/default_theme/selection_oof.png +++ b/scene/resources/default_theme/selection_oof.png diff --git a/scene/resources/default_theme/spinbox_updown.png b/scene/resources/default_theme/spinbox_updown.png Binary files differindex b40b1e9fd2..204339e1d9 100644 --- a/scene/resources/default_theme/spinbox_updown.png +++ b/scene/resources/default_theme/spinbox_updown.png diff --git a/scene/resources/default_theme/submenu.png b/scene/resources/default_theme/submenu.png Binary files differindex ec727eecf1..2e00b766e8 100644 --- a/scene/resources/default_theme/submenu.png +++ b/scene/resources/default_theme/submenu.png diff --git a/scene/resources/default_theme/tab.png b/scene/resources/default_theme/tab.png Binary files differindex b16903334c..3e4d792a48 100644 --- a/scene/resources/default_theme/tab.png +++ b/scene/resources/default_theme/tab.png diff --git a/scene/resources/default_theme/tab_behind.png b/scene/resources/default_theme/tab_behind.png Binary files differindex e872446162..12f07c3a91 100644 --- a/scene/resources/default_theme/tab_behind.png +++ b/scene/resources/default_theme/tab_behind.png diff --git a/scene/resources/default_theme/tab_close.png b/scene/resources/default_theme/tab_close.png Binary files differindex 20d9b5c810..6195559257 100644 --- a/scene/resources/default_theme/tab_close.png +++ b/scene/resources/default_theme/tab_close.png diff --git a/scene/resources/default_theme/tab_container_bg.png b/scene/resources/default_theme/tab_container_bg.png Binary files differindex 6b713f76b2..92482aaf28 100644 --- a/scene/resources/default_theme/tab_container_bg.png +++ b/scene/resources/default_theme/tab_container_bg.png diff --git a/scene/resources/default_theme/tab_current.png b/scene/resources/default_theme/tab_current.png Binary files differindex b18dd88183..7289e032da 100644 --- a/scene/resources/default_theme/tab_current.png +++ b/scene/resources/default_theme/tab_current.png diff --git a/scene/resources/default_theme/tab_menu.png b/scene/resources/default_theme/tab_menu.png Binary files differindex 148b64b8aa..5f80512336 100644 --- a/scene/resources/default_theme/tab_menu.png +++ b/scene/resources/default_theme/tab_menu.png diff --git a/scene/resources/default_theme/tab_menu_hl.png b/scene/resources/default_theme/tab_menu_hl.png Binary files differindex 148b64b8aa..5f80512336 100644 --- a/scene/resources/default_theme/tab_menu_hl.png +++ b/scene/resources/default_theme/tab_menu_hl.png diff --git a/scene/resources/default_theme/theme_data.h b/scene/resources/default_theme/theme_data.h index 80148c0fc5..ab758f72b4 100644 --- a/scene/resources/default_theme/theme_data.h +++ b/scene/resources/default_theme/theme_data.h @@ -5,527 +5,527 @@ static const unsigned char arrow_down_png[]={ 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}; static const unsigned char arrow_right_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0xc,0x0,0x0,0x0,0xc,0x8,0x6,0x0,0x0,0x0,0x56,0x75,0x5c,0xe7,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x6c,0x49,0x44,0x41,0x54,0x28,0x91,0x63,0x60,0xa0,0x35,0x60,0x44,0xe6,0x3c,0x78,0xf0,0xe0,0x3f,0x8c,0xfd,0xff,0xff,0xff,0x44,0x45,0x45,0xc5,0x5,0xe8,0x1a,0x98,0x70,0x9a,0xc4,0xc8,0x38,0xe5,0xe1,0xc3,0x87,0xda,0x44,0x6b,0x60,0x60,0x60,0xe0,0xfe,0xff,0xff,0xff,0xaa,0x17,0x2f,0x5e,0x70,0x13,0xab,0x81,0x81,0x81,0x81,0x41,0xeb,0xe7,0xcf,0x9f,0x53,0x48,0xd1,0x80,0x1,0x8,0x69,0xb8,0xc6,0xce,0xce,0x9e,0x43,0xac,0x86,0xaf,0x8c,0x8c,0x8c,0x61,0x12,0x12,0x12,0x5f,0x89,0xd2,0xf0,0xff,0xff,0xff,0x1c,0x79,0x79,0xf9,0xab,0x84,0x1d,0x49,0x6d,0x0,0x0,0x8f,0x30,0x1e,0x10,0x6e,0x79,0xda,0xf9,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char background_png[]={ 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}; static const unsigned char base_green_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x20,0x0,0x0,0x0,0x20,0x8,0x2,0x0,0x0,0x0,0xfc,0x18,0xed,0xa3,0x0,0x0,0x0,0x1,0x73,0x52,0x47,0x42,0x0,0xae,0xce,0x1c,0xe9,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xd8,0xc,0x13,0x16,0x18,0x25,0x64,0x51,0xb2,0x4e,0x0,0x0,0x0,0x19,0x74,0x45,0x58,0x74,0x43,0x6f,0x6d,0x6d,0x65,0x6e,0x74,0x0,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x77,0x69,0x74,0x68,0x20,0x47,0x49,0x4d,0x50,0x57,0x81,0xe,0x17,0x0,0x0,0x0,0x2c,0x49,0x44,0x41,0x54,0x48,0xc7,0xed,0xcd,0x31,0x1,0x0,0x30,0x8,0x0,0x20,0x5d,0xff,0xc3,0x1e,0x26,0xb1,0xd5,0x4a,0xe8,0x7,0x5,0xc8,0x9a,0x8e,0x4b,0x2f,0x8e,0x9,0x4,0x2,0x81,0x40,0x20,0x10,0x8,0x4,0x82,0x2d,0x1f,0xfd,0xf4,0x2,0x44,0x79,0x8c,0x0,0x63,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char button_disabled_png[]={ 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}; static const unsigned char button_focus_png[]={ 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}; static const unsigned char button_hover_png[]={ 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}; static const unsigned char button_normal_png[]={ 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}; static const unsigned char button_pressed_png[]={ 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}; static const unsigned char checked_png[]={ 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}; static const unsigned char checker_bg_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x1,0x73,0x52,0x47,0x42,0x0,0xae,0xce,0x1c,0xe9,0x0,0x0,0x0,0x4,0x67,0x41,0x4d,0x41,0x0,0x0,0xb1,0x8f,0xb,0xfc,0x61,0x5,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xe,0xc4,0x0,0x0,0xe,0xc4,0x1,0x95,0x2b,0xe,0x1b,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0x14,0xd,0x1c,0x1b,0x52,0x41,0x72,0xa4,0x0,0x0,0x0,0x24,0x49,0x44,0x41,0x54,0x28,0x53,0x63,0xfc,0xf,0x4,0xc,0x48,0xa0,0xa1,0xa1,0x1,0xca,0x82,0x0,0x26,0x28,0x8d,0x13,0x50,0xae,0x80,0xb1,0xbe,0xbe,0x7e,0x60,0xdd,0xc0,0xc0,0x0,0x0,0x78,0x11,0x9,0x87,0x2b,0xa,0xe1,0x69,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char close_png[]={ 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}; static const unsigned char close_hl_png[]={ 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}; static const unsigned char dosfont_png[]={ 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}; static const unsigned char dropdown_png[]={ 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}; static const unsigned char error_icon_png[]={ 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}; static const unsigned char focus_png[]={ 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}; static const unsigned char frame_focus_png[]={ 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}; static const unsigned char full_panel_bg_png[]={ 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}; static const unsigned char graph_node_png[]={ 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}; static const unsigned char graph_node_close_png[]={ 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}; static const unsigned char graph_node_default_png[]={ 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}; static const unsigned char graph_node_default_focus_png[]={ 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}; static const unsigned char graph_node_selected_png[]={ 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}; static const unsigned char graph_port_png[]={ 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}; static const unsigned char hseparator_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x1,0x73,0x52,0x47,0x42,0x0,0xae,0xce,0x1c,0xe9,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xda,0x3,0x15,0x11,0x5,0xc,0x36,0x33,0x39,0xbd,0x0,0x0,0x0,0x24,0x49,0x44,0x41,0x54,0x18,0xd3,0x63,0x60,0x40,0x2,0xc5,0xb3,0x57,0x6d,0x66,0xc0,0x7,0xce,0xdd,0x79,0x88,0xa1,0x80,0x89,0x81,0x0,0x18,0x74,0xa,0x96,0xee,0x3f,0x89,0xa1,0x0,0x0,0x48,0xe6,0x7,0xe3,0x62,0xce,0xeb,0xba,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char hslider_bg_png[]={ 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}; static const unsigned char hslider_grabber_png[]={ 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}; static const unsigned char hslider_grabber_hl_png[]={ 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}; static const unsigned char hslider_tick_png[]={ 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}; static const unsigned char hsplit_bg_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0x14,0xd,0x13,0x21,0x13,0xd5,0xb7,0xd9,0x0,0x0,0x0,0x19,0x74,0x45,0x58,0x74,0x43,0x6f,0x6d,0x6d,0x65,0x6e,0x74,0x0,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x77,0x69,0x74,0x68,0x20,0x47,0x49,0x4d,0x50,0x57,0x81,0xe,0x17,0x0,0x0,0x0,0x15,0x49,0x44,0x41,0x54,0x18,0x95,0x63,0x54,0x57,0xd7,0xfc,0xcf,0x80,0x7,0x30,0xe1,0x93,0x1c,0x3e,0xa,0x0,0x86,0x1b,0x1,0x86,0x56,0xb4,0xba,0xe,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char hsplitter_png[]={ 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}; static const unsigned char icon_add_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x36,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x60,0xa0,0x25,0x78,0xf0,0xe0,0xc1,0xff,0x7,0xf,0x1e,0xfc,0xc7,0xa7,0x86,0x89,0x52,0x4b,0x46,0xd,0x60,0x60,0x60,0x64,0x60,0x80,0x84,0x36,0x39,0x9a,0x15,0x14,0x14,0x18,0x29,0x76,0x1,0x5e,0x30,0x9a,0xe,0xe8,0x64,0x0,0xc5,0x0,0x0,0xc7,0x6e,0x12,0x94,0xf9,0x26,0x2e,0xdb,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char icon_close_png[]={ 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}; static const unsigned char icon_color_pick_png[]={ 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}; static const unsigned char icon_folder_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x5f,0x49,0x44,0x41,0x54,0x38,0x8d,0xed,0x8f,0xc1,0xd,0x80,0x30,0x8,0x45,0x9f,0x9d,0x84,0x39,0x4c,0x3b,0xbd,0x75,0x8f,0x32,0x9,0x5e,0xec,0xa5,0x9,0xa4,0xc6,0x26,0x5e,0x7c,0x17,0xe,0xc0,0xe3,0x3,0x5f,0xb3,0x1,0xb4,0xd6,0x4e,0x60,0x77,0x66,0xaa,0x88,0x14,0x4f,0x90,0xee,0xea,0x2d,0x3,0xe4,0x28,0x41,0x8a,0x9a,0x1d,0x55,0x75,0x25,0xfd,0x5,0x9b,0x11,0xd,0x54,0x11,0x29,0x53,0x9,0x1c,0x32,0x4c,0xbe,0x10,0xf1,0xb,0x16,0xa,0xea,0xd3,0x45,0x33,0x3b,0xde,0x1e,0x5f,0xc3,0x5,0x1f,0xc5,0x12,0x2c,0xc5,0x88,0xe1,0xb4,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char icon_play_png[]={ 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}; static const unsigned char icon_reload_png[]={ 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}; static const unsigned char icon_stop_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0xf,0x14,0x33,0x24,0x62,0xd4,0x2f,0x95,0x0,0x0,0x0,0x39,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x60,0xa0,0x6,0xf8,0xf0,0xe1,0x3,0x33,0xb9,0x7a,0x18,0x61,0x2,0xf,0x1f,0x3e,0xfc,0x4f,0x8a,0x1,0xf2,0xf2,0xf2,0x8c,0xc,0xc,0xc,0xc,0x4c,0xa4,0xda,0x8c,0xe,0x46,0xd,0x18,0x35,0x60,0x70,0x18,0xc0,0xc0,0xc0,0x40,0x59,0x66,0xa2,0x18,0x0,0x0,0x2a,0xc7,0xf,0x64,0xd5,0xe,0x11,0x85,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char icon_zoom_less_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x25,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x60,0x18,0x5,0xc3,0x0,0x30,0x32,0x30,0x30,0x30,0x3c,0x78,0xf0,0xe0,0x3f,0x39,0x9a,0x15,0x14,0x14,0x18,0x99,0xa8,0xeb,0x9e,0x51,0x30,0x44,0x1,0x0,0xff,0xa9,0x4,0x4,0x4a,0xae,0x20,0xfa,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char icon_zoom_more_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x36,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x60,0xa0,0x25,0x78,0xf0,0xe0,0xc1,0xff,0x7,0xf,0x1e,0xfc,0xc7,0xa7,0x86,0x89,0x52,0x4b,0x46,0xd,0x60,0x60,0x60,0x64,0x60,0x80,0x84,0x36,0x39,0x9a,0x15,0x14,0x14,0x18,0x29,0x76,0x1,0x5e,0x30,0x9a,0xe,0xe8,0x64,0x0,0xc5,0x0,0x0,0xc7,0x6e,0x12,0x94,0xf9,0x26,0x2e,0xdb,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char icon_zoom_reset_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x6f,0x49,0x44,0x41,0x54,0x38,0x8d,0xdd,0x91,0xbb,0xd,0x80,0x30,0x10,0x43,0x1f,0x11,0x23,0x20,0xea,0x4c,0xc5,0x62,0x48,0xec,0xc0,0x56,0x97,0x26,0x43,0xa4,0x31,0x15,0x12,0x45,0x72,0x8a,0x14,0xa,0x84,0xab,0xfb,0x58,0x3e,0xeb,0xc,0x83,0x98,0xee,0x22,0xa5,0xb4,0x49,0x3a,0x1,0x62,0x8c,0x53,0x8d,0x5c,0xe3,0x4,0x80,0x9c,0xf3,0x22,0x69,0xf7,0x2e,0xb5,0x38,0x1,0xa0,0x94,0x72,0x0,0xab,0x27,0xd0,0xc3,0xc1,0xcc,0x64,0x66,0x6a,0xf5,0xb5,0x59,0x70,0x15,0x3b,0x30,0x7b,0xcb,0xd6,0x33,0x9f,0x18,0x76,0xf0,0x71,0x81,0x5a,0xa,0xaf,0x3b,0xf8,0x41,0xa,0xc3,0xb8,0x0,0x6c,0x9c,0x3f,0xb8,0x84,0xfc,0x5b,0x85,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char line_edit_png[]={ 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}; static const unsigned char line_edit_disabled_png[]={ 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}; static const unsigned char line_edit_focus_png[]={ 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}; static const unsigned char logo_png[]={ 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}; static const unsigned char option_arrow_png[]={ 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}; static const unsigned char option_button_disabled_png[]={ 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}; static const unsigned char option_button_focus_png[]={ 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}; static const unsigned char option_button_hover_png[]={ 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}; static const unsigned char option_button_normal_png[]={ 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}; static const unsigned char option_button_pressed_png[]={ 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}; static const unsigned char panel_bg_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0x35,0x0,0x32,0x0,0x3b,0x6,0x66,0x54,0x53,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xdf,0xa,0x15,0x2,0x31,0xf,0x57,0xad,0x75,0x1b,0x0,0x0,0x0,0x19,0x74,0x45,0x58,0x74,0x43,0x6f,0x6d,0x6d,0x65,0x6e,0x74,0x0,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x77,0x69,0x74,0x68,0x20,0x47,0x49,0x4d,0x50,0x57,0x81,0xe,0x17,0x0,0x0,0x0,0x16,0x49,0x44,0x41,0x54,0x18,0xd3,0x63,0x54,0x55,0xd5,0xfa,0xcf,0x80,0x7,0x30,0x31,0x10,0x0,0xc3,0x43,0x1,0x0,0x83,0x6,0x1,0x83,0xc0,0x1f,0xe3,0x5,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char popup_bg_png[]={ 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}; static const unsigned char popup_bg_disabled_png[]={ 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}; static const unsigned char popup_checked_png[]={ 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}; static const unsigned char popup_hover_png[]={ 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}; static const unsigned char popup_unchecked_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x1,0x73,0x52,0x47,0x42,0x0,0xae,0xce,0x1c,0xe9,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xd9,0xb,0x17,0x6,0xe,0x1a,0x24,0x97,0x11,0x36,0x0,0x0,0x0,0x15,0x49,0x44,0x41,0x54,0x18,0xd3,0x63,0xfc,0xcf,0xf0,0x9f,0x1,0x1f,0x60,0x62,0x20,0x0,0x86,0x87,0x2,0x0,0x13,0x5a,0x2,0xe,0x7,0x1c,0xa9,0x13,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char popup_window_png[]={ 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}; static const unsigned char progress_bar_png[]={ 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}; static const unsigned char progress_fill_png[]={ 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}; static const unsigned char radio_checked_png[]={ 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}; static const unsigned char radio_unchecked_png[]={ 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}; static const unsigned char reference_border_png[]={ 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}; static const unsigned char scroll_bg_png[]={ 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}; static const unsigned char scroll_button_down_png[]={ 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}; static const unsigned char scroll_button_down_hl_png[]={ 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}; static const unsigned char scroll_button_left_png[]={ 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}; static const unsigned char scroll_button_left_hl_png[]={ 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}; static const unsigned char scroll_button_right_png[]={ 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}; static const unsigned char scroll_button_right_hl_png[]={ 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}; static const unsigned char scroll_button_up_png[]={ 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}; static const unsigned char scroll_button_up_hl_png[]={ 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}; static const unsigned char scroll_grabber_png[]={ 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}; static const unsigned char scroll_grabber_hl_png[]={ 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}; static const unsigned char selection_png[]={ 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}; static const unsigned char selection_oof_png[]={ 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}; static const unsigned char spinbox_updown_png[]={ 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}; static const unsigned char submenu_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x64,0x49,0x44,0x41,0x54,0x18,0x95,0x7d,0xca,0x21,0x12,0x80,0x20,0x14,0x45,0xd1,0xf7,0x2d,0x4,0x36,0x40,0x63,0xa8,0xba,0x1f,0xbb,0x9d,0xe5,0xb8,0x0,0xb3,0xfb,0xd1,0xc,0x8d,0xd,0x10,0x48,0xcf,0x22,0x6,0xc7,0xef,0x6d,0x77,0xe6,0x8,0x0,0xa4,0x94,0x88,0x3b,0x92,0x4b,0x8,0x61,0xeb,0x3f,0xe0,0x95,0x88,0xac,0x39,0xe7,0x49,0x5,0x0,0x2c,0xc9,0xbd,0x94,0x62,0x35,0x0,0x0,0x63,0x6b,0x6d,0xfd,0x3,0x4f,0x1a,0x38,0x8d,0x31,0x51,0x3,0x55,0x44,0x66,0xe7,0x5c,0xfd,0x4,0x24,0xa3,0xf7,0xfe,0xe8,0x7f,0x1,0xe,0xc2,0x1e,0x10,0xa,0xf0,0x33,0x4c,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char tab_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x1,0x73,0x52,0x47,0x42,0x0,0xae,0xce,0x1c,0xe9,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0x0,0x0,0x0,0x0,0x0,0xf9,0x43,0xbb,0x7f,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xdb,0xc,0x14,0x0,0x1,0xe,0x50,0x5,0x77,0xc3,0x0,0x0,0x0,0x24,0x49,0x44,0x41,0x54,0x18,0xd3,0x63,0x60,0x20,0x6,0xfc,0xff,0xff,0x3f,0xf2,0xff,0xff,0xff,0x22,0x50,0x1c,0x49,0x5d,0x45,0x4c,0xc,0xc4,0x2,0xbc,0x56,0x10,0x65,0x3f,0x2e,0x0,0x0,0x25,0x24,0x40,0x9,0xd4,0xd9,0x6,0x7e,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char tab_behind_png[]={ 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}; static const unsigned char tab_close_png[]={ 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}; static const unsigned char tab_container_bg_png[]={ 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}; static const unsigned char tab_current_png[]={ 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}; static const unsigned char tab_menu_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x6f,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x60,0x18,0x5,0xa3,0x80,0x81,0x81,0x11,0x5d,0xe0,0xc1,0x83,0x7,0xff,0xf1,0x69,0x50,0x50,0x50,0x40,0xd1,0xc3,0x44,0xa9,0xb,0xa8,0x6f,0x0,0x23,0x23,0x63,0x3c,0x3,0x3,0xc3,0x57,0x2c,0x6a,0xbf,0x33,0x32,0x32,0xa6,0x63,0xa8,0xc7,0x66,0xea,0xfd,0xfb,0xf7,0x35,0x18,0x18,0x18,0x56,0x31,0x32,0x32,0xea,0x42,0x85,0x6e,0x30,0x33,0x33,0x87,0xc9,0xca,0xca,0x5e,0x26,0xca,0x0,0x6,0x6,0x6,0x86,0x17,0x2f,0x5e,0x70,0xff,0xfc,0xf9,0x73,0xa,0x3,0x3,0x3,0x3,0x3b,0x3b,0x7b,0x8e,0x84,0x84,0x4,0x36,0x57,0xd,0x2,0x0,0x0,0x67,0xf2,0x14,0xc2,0xc2,0xbe,0xf5,0xb5,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char tab_menu_hl_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x6f,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x60,0x18,0x5,0xa3,0x80,0x81,0x81,0x11,0x5d,0xe0,0xc1,0x83,0x7,0xff,0xf1,0x69,0x50,0x50,0x50,0x40,0xd1,0xc3,0x44,0xa9,0xb,0xa8,0x6f,0x0,0x23,0x23,0x63,0x3c,0x3,0x3,0xc3,0x57,0x2c,0x6a,0xbf,0x33,0x32,0x32,0xa6,0x63,0xa8,0xc7,0x66,0xea,0xfd,0xfb,0xf7,0x35,0x18,0x18,0x18,0x56,0x31,0x32,0x32,0xea,0x42,0x85,0x6e,0x30,0x33,0x33,0x87,0xc9,0xca,0xca,0x5e,0x26,0xca,0x0,0x6,0x6,0x6,0x86,0x17,0x2f,0x5e,0x70,0xff,0xfc,0xf9,0x73,0xa,0x3,0x3,0x3,0x3,0x3b,0x3b,0x7b,0x8e,0x84,0x84,0x4,0x36,0x57,0xd,0x2,0x0,0x0,0x67,0xf2,0x14,0xc2,0xc2,0xbe,0xf5,0xb5,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char toggle_off_png[]={ 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}; static const unsigned char toggle_on_png[]={ 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}; static const unsigned char tool_button_pressed_png[]={ 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}; static const unsigned char tooltip_bg_png[]={ 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}; static const unsigned char tree_bg_png[]={ 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}; static const unsigned char tree_bg_focus_png[]={ 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}; static const unsigned char tree_cursor_png[]={ 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}; static const unsigned char tree_cursor_unfocus_png[]={ 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}; static const unsigned char tree_title_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0x4c,0x0,0x4a,0x0,0x4e,0x88,0x29,0x6a,0xb6,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0x10,0x14,0x11,0x9,0x88,0xc3,0x72,0x9,0x0,0x0,0x0,0x19,0x74,0x45,0x58,0x74,0x43,0x6f,0x6d,0x6d,0x65,0x6e,0x74,0x0,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x77,0x69,0x74,0x68,0x20,0x47,0x49,0x4d,0x50,0x57,0x81,0xe,0x17,0x0,0x0,0x0,0x1d,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x54,0x55,0x56,0xfd,0xcf,0x40,0x1,0x60,0xa2,0x44,0xf3,0xa8,0x1,0xa3,0x6,0x8c,0x1a,0x30,0x98,0xc,0x0,0x0,0x7,0x54,0x1,0x8c,0x3f,0xc3,0xfb,0x99,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char tree_title_pressed_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x6,0x0,0x0,0x0,0x1f,0xf3,0xff,0x61,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0x4c,0x0,0x4a,0x0,0x4e,0x88,0x29,0x6a,0xb6,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0x10,0x14,0x11,0x5,0x81,0x75,0x3e,0x22,0x0,0x0,0x0,0x19,0x74,0x45,0x58,0x74,0x43,0x6f,0x6d,0x6d,0x65,0x6e,0x74,0x0,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x77,0x69,0x74,0x68,0x20,0x47,0x49,0x4d,0x50,0x57,0x81,0xe,0x17,0x0,0x0,0x0,0x1d,0x49,0x44,0x41,0x54,0x38,0x8d,0x63,0x34,0x33,0x31,0xfb,0xcf,0x40,0x1,0x60,0xa2,0x44,0xf3,0xa8,0x1,0xa3,0x6,0x8c,0x1a,0x30,0x98,0xc,0x0,0x0,0xd6,0x1e,0x1,0xbf,0x4c,0xf9,0x63,0xb6,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char unchecked_png[]={ 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}; static const unsigned char updown_png[]={ 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}; static const unsigned char vseparator_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x1,0x73,0x52,0x47,0x42,0x0,0xae,0xce,0x1c,0xe9,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xda,0x3,0x15,0x11,0x5,0xf,0xaf,0x3a,0x68,0x7,0x0,0x0,0x0,0x1d,0x49,0x44,0x41,0x54,0x18,0xd3,0x63,0x60,0xa0,0x39,0x60,0x2c,0x9e,0xbd,0x6a,0x73,0xb4,0xa3,0x39,0x56,0xc9,0xa5,0xfb,0x4f,0x32,0xc,0x6,0x0,0x0,0x33,0x26,0x5,0x6d,0xfc,0xee,0xf3,0x6,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char vslider_bg_png[]={ 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}; static const unsigned char vslider_grabber_png[]={ 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}; static const unsigned char vslider_grabber_hl_png[]={ 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}; static const unsigned char vslider_tick_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x4,0x8,0x6,0x0,0x0,0x0,0x87,0xb4,0xbf,0xec,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0xf,0x14,0x28,0x1f,0x7a,0xe9,0xd,0x2b,0x0,0x0,0x0,0x46,0x49,0x44,0x41,0x54,0x18,0x95,0x63,0x60,0xa0,0x10,0x30,0x36,0x35,0x35,0x55,0x72,0x73,0x73,0x33,0x70,0x73,0x73,0x33,0xbc,0xe4,0x12,0x6d,0xe7,0xe6,0xe2,0x66,0x28,0x9,0xf1,0xc0,0xaa,0xd8,0x22,0x34,0x9e,0x41,0xec,0xe7,0x7b,0x43,0x13,0x13,0x13,0xf,0x98,0x1e,0x96,0x33,0x67,0xce,0xec,0x80,0x29,0x78,0xc5,0x2e,0x48,0x8c,0xa5,0xaf,0x91,0xf5,0x50,0xc,0x0,0x36,0xc,0x11,0x6c,0x6d,0xa6,0x47,0xcd,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char vsplit_bg_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x8,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0xc4,0xf,0xbe,0x8b,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0x14,0xd,0x13,0x1b,0xd5,0xd9,0x6e,0x6b,0x0,0x0,0x0,0x19,0x74,0x45,0x58,0x74,0x43,0x6f,0x6d,0x6d,0x65,0x6e,0x74,0x0,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x77,0x69,0x74,0x68,0x20,0x47,0x49,0x4d,0x50,0x57,0x81,0xe,0x17,0x0,0x0,0x0,0x15,0x49,0x44,0x41,0x54,0x18,0x95,0x63,0x54,0x57,0xd7,0xfc,0xcf,0x80,0x7,0x30,0xe1,0x93,0x1c,0x3e,0xa,0x0,0x86,0x1b,0x1,0x86,0x56,0xb4,0xba,0xe,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; static const unsigned char vsplitter_png[]={ -0x89,0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0,0x0,0x0,0x40,0x0,0x0,0x0,0x8,0x8,0x6,0x0,0x0,0x0,0x49,0x62,0xf9,0xdf,0x0,0x0,0x0,0x6,0x62,0x4b,0x47,0x44,0x0,0xff,0x0,0xff,0x0,0xff,0xa0,0xbd,0xa7,0x93,0x0,0x0,0x0,0x9,0x70,0x48,0x59,0x73,0x0,0x0,0xb,0x13,0x0,0x0,0xb,0x13,0x1,0x0,0x9a,0x9c,0x18,0x0,0x0,0x0,0x7,0x74,0x49,0x4d,0x45,0x7,0xde,0x9,0xf,0x14,0x27,0x31,0x21,0xa7,0x1c,0x2b,0x0,0x0,0x0,0x19,0x74,0x45,0x58,0x74,0x43,0x6f,0x6d,0x6d,0x65,0x6e,0x74,0x0,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x77,0x69,0x74,0x68,0x20,0x47,0x49,0x4d,0x50,0x57,0x81,0xe,0x17,0x0,0x0,0x0,0x38,0x49,0x44,0x41,0x54,0x48,0x89,0x63,0x60,0x18,0x5,0xc,0xc,0xb,0x16,0x2c,0xf8,0x9f,0x9a,0x9a,0xfa,0x7f,0x24,0xf2,0x99,0x18,0x18,0x18,0x18,0x8e,0x1e,0x3d,0xca,0x70,0xed,0xda,0x35,0x78,0x80,0x8c,0x34,0xfe,0x28,0x18,0xf1,0x60,0x30,0xe5,0x49,0x7a,0xf3,0x47,0xcb,0x80,0x91,0xe,0x0,0x53,0x40,0x3b,0xd4,0x11,0xa7,0x10,0x39,0x0,0x0,0x0,0x0,0x49,0x45,0x4e,0x44,0xae,0x42,0x60,0x82 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}; diff --git a/scene/resources/default_theme/toggle_off.png b/scene/resources/default_theme/toggle_off.png Binary files differindex aa1c96e5a0..71cd64b001 100644 --- a/scene/resources/default_theme/toggle_off.png +++ b/scene/resources/default_theme/toggle_off.png diff --git a/scene/resources/default_theme/toggle_on.png b/scene/resources/default_theme/toggle_on.png Binary files differindex 0a69d36ae8..6ea1b589c7 100644 --- a/scene/resources/default_theme/toggle_on.png +++ b/scene/resources/default_theme/toggle_on.png diff --git a/scene/resources/default_theme/tool_button_pressed.png b/scene/resources/default_theme/tool_button_pressed.png Binary files differindex 192aae24bf..bcf70b486d 100644 --- a/scene/resources/default_theme/tool_button_pressed.png +++ b/scene/resources/default_theme/tool_button_pressed.png diff --git a/scene/resources/default_theme/tooltip_bg.png b/scene/resources/default_theme/tooltip_bg.png Binary files differindex c5eb502ace..eca0675a98 100644 --- a/scene/resources/default_theme/tooltip_bg.png +++ b/scene/resources/default_theme/tooltip_bg.png diff --git a/scene/resources/default_theme/tree_bg.png b/scene/resources/default_theme/tree_bg.png Binary files differindex e1c42a39ec..839a6a272a 100644 --- a/scene/resources/default_theme/tree_bg.png +++ b/scene/resources/default_theme/tree_bg.png diff --git a/scene/resources/default_theme/tree_bg_focus.png b/scene/resources/default_theme/tree_bg_focus.png Binary files differindex a002ad8fa5..692cf71926 100644 --- a/scene/resources/default_theme/tree_bg_focus.png +++ b/scene/resources/default_theme/tree_bg_focus.png diff --git a/scene/resources/default_theme/tree_cursor.png b/scene/resources/default_theme/tree_cursor.png Binary files differindex 9c430e4028..94d2a08818 100644 --- a/scene/resources/default_theme/tree_cursor.png +++ b/scene/resources/default_theme/tree_cursor.png diff --git a/scene/resources/default_theme/tree_cursor_unfocus.png b/scene/resources/default_theme/tree_cursor_unfocus.png Binary files differindex cf3abfaa72..3f023bbabe 100644 --- a/scene/resources/default_theme/tree_cursor_unfocus.png +++ b/scene/resources/default_theme/tree_cursor_unfocus.png diff --git a/scene/resources/default_theme/tree_title.png b/scene/resources/default_theme/tree_title.png Binary files differindex e7a158b961..b0ddcffbbe 100644 --- a/scene/resources/default_theme/tree_title.png +++ b/scene/resources/default_theme/tree_title.png diff --git a/scene/resources/default_theme/tree_title_pressed.png b/scene/resources/default_theme/tree_title_pressed.png Binary files differindex 82b49cdd2f..746d10039e 100644 --- a/scene/resources/default_theme/tree_title_pressed.png +++ b/scene/resources/default_theme/tree_title_pressed.png diff --git a/scene/resources/default_theme/unchecked.png b/scene/resources/default_theme/unchecked.png Binary files differindex f8710d03df..d6f790cbc2 100644 --- a/scene/resources/default_theme/unchecked.png +++ b/scene/resources/default_theme/unchecked.png diff --git a/scene/resources/default_theme/updown.png b/scene/resources/default_theme/updown.png Binary files differindex 916284a3cf..a0c577db5b 100644 --- a/scene/resources/default_theme/updown.png +++ b/scene/resources/default_theme/updown.png diff --git a/scene/resources/default_theme/vseparator.png b/scene/resources/default_theme/vseparator.png Binary files differindex e8a162c469..498768c05b 100644 --- a/scene/resources/default_theme/vseparator.png +++ b/scene/resources/default_theme/vseparator.png diff --git a/scene/resources/default_theme/vslider_bg.png b/scene/resources/default_theme/vslider_bg.png Binary files differindex d58d4b1659..8d9ead3c5a 100644 --- a/scene/resources/default_theme/vslider_bg.png +++ b/scene/resources/default_theme/vslider_bg.png diff --git a/scene/resources/default_theme/vslider_grabber.png b/scene/resources/default_theme/vslider_grabber.png Binary files differindex 50ef5680da..a61a6a57c9 100644 --- a/scene/resources/default_theme/vslider_grabber.png +++ b/scene/resources/default_theme/vslider_grabber.png diff --git a/scene/resources/default_theme/vslider_grabber_hl.png b/scene/resources/default_theme/vslider_grabber_hl.png Binary files differindex 93eba4b174..548dbbbff8 100644 --- a/scene/resources/default_theme/vslider_grabber_hl.png +++ b/scene/resources/default_theme/vslider_grabber_hl.png diff --git a/scene/resources/default_theme/vslider_tick.png b/scene/resources/default_theme/vslider_tick.png Binary files differindex 76c5870dbc..873ebb00d8 100644 --- a/scene/resources/default_theme/vslider_tick.png +++ b/scene/resources/default_theme/vslider_tick.png diff --git a/scene/resources/default_theme/vsplit_bg.png b/scene/resources/default_theme/vsplit_bg.png Binary files differindex f4e1715447..7dd1d48b29 100644 --- a/scene/resources/default_theme/vsplit_bg.png +++ b/scene/resources/default_theme/vsplit_bg.png diff --git a/scene/resources/default_theme/vsplitter.png b/scene/resources/default_theme/vsplitter.png Binary files differindex 4a9904a3ec..ec5542bf69 100644 --- a/scene/resources/default_theme/vsplitter.png +++ b/scene/resources/default_theme/vsplitter.png diff --git a/scene/resources/dynamic_font.cpp b/scene/resources/dynamic_font.cpp index bb40c5ed93..c3b40f7add 100644 --- a/scene/resources/dynamic_font.cpp +++ b/scene/resources/dynamic_font.cpp @@ -271,7 +271,7 @@ Size2 DynamicFontAtSize::get_char_size(CharType p_char,CharType p_next,const Vec } -float DynamicFontAtSize::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate,const Vector<Ref<DynamicFontAtSize> >& p_fallbacks) const { +float DynamicFontAtSize::draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next,const Color& p_modulate,const Vector<Ref<DynamicFontAtSize> >& p_fallbacks) const { if (!valid) return 0; @@ -686,7 +686,7 @@ bool DynamicFont::is_distance_field_hint() const{ return false; } -float DynamicFont::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate) const { +float DynamicFont::draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next,const Color& p_modulate) const { if (!data_at_size.is_valid()) return 0; diff --git a/scene/resources/dynamic_font.h b/scene/resources/dynamic_font.h index 508d630218..9ad1b4edbf 100644 --- a/scene/resources/dynamic_font.h +++ b/scene/resources/dynamic_font.h @@ -143,7 +143,7 @@ public: Size2 get_char_size(CharType p_char,CharType p_next,const Vector<Ref<DynamicFontAtSize> >& p_fallbacks) const; - float draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate,const Vector<Ref<DynamicFontAtSize> >& p_fallbacks) const; + float draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next,const Color& p_modulate,const Vector<Ref<DynamicFontAtSize> >& p_fallbacks) const; @@ -199,7 +199,7 @@ public: virtual bool is_distance_field_hint() const; - virtual float draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next=0,const Color& p_modulate=Color(1,1,1)) const; + virtual float draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next=0,const Color& p_modulate=Color(1,1,1)) const; DynamicFont(); ~DynamicFont(); diff --git a/scene/resources/dynamic_font_stb.cpp b/scene/resources/dynamic_font_stb.cpp index 0b9f95da4f..456e6a5ee7 100644 --- a/scene/resources/dynamic_font_stb.cpp +++ b/scene/resources/dynamic_font_stb.cpp @@ -142,7 +142,7 @@ Size2 DynamicFontAtSize::get_char_size(CharType p_char,CharType p_next) const { } -float DynamicFontAtSize::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate) const { +float DynamicFontAtSize::draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next,const Color& p_modulate) const { const_cast<DynamicFontAtSize*>(this)->_update_char(p_char); @@ -455,7 +455,7 @@ bool DynamicFont::is_distance_field_hint() const{ return false; } -float DynamicFont::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate) const { +float DynamicFont::draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next,const Color& p_modulate) const { if (!data_at_size.is_valid()) return 0; diff --git a/scene/resources/dynamic_font_stb.h b/scene/resources/dynamic_font_stb.h index 6b72fb3703..136edff2fc 100644 --- a/scene/resources/dynamic_font_stb.h +++ b/scene/resources/dynamic_font_stb.h @@ -112,7 +112,7 @@ public: Size2 get_char_size(CharType p_char,CharType p_next=0) const; - float draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next=0,const Color& p_modulate=Color(1,1,1)) const; + float draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next=0,const Color& p_modulate=Color(1,1,1)) const; @@ -152,7 +152,7 @@ public: virtual bool is_distance_field_hint() const; - virtual float draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next=0,const Color& p_modulate=Color(1,1,1)) const; + virtual float draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next=0,const Color& p_modulate=Color(1,1,1)) const; DynamicFont(); ~DynamicFont(); diff --git a/scene/resources/font.cpp b/scene/resources/font.cpp index 0d8d224037..6ad8a95565 100644 --- a/scene/resources/font.cpp +++ b/scene/resources/font.cpp @@ -506,7 +506,7 @@ Ref<BitmapFont> BitmapFont::get_fallback() const{ return fallback; } -float BitmapFont::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next,const Color& p_modulate) const { +float BitmapFont::draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char, CharType p_next, const Color& p_modulate) const { const Character * c = char_map.getptr(p_char); diff --git a/scene/resources/font.h b/scene/resources/font.h index 91f4874932..67836564cd 100644 --- a/scene/resources/font.h +++ b/scene/resources/font.h @@ -59,7 +59,7 @@ public: void draw(RID p_canvas_item, const Point2& p_pos, const String& p_text,const Color& p_modulate=Color(1,1,1),int p_clip_w=-1) const; void draw_halign(RID p_canvas_item, const Point2& p_pos, HAlign p_align,float p_width,const String& p_text,const Color& p_modulate=Color(1,1,1)) const; - virtual float draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next=0,const Color& p_modulate=Color(1,1,1)) const=0; + virtual float draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char, CharType p_next=0,const Color& p_modulate=Color(1,1,1)) const=0; Font(); @@ -155,7 +155,7 @@ public: void set_distance_field_hint(bool p_distance_field); bool is_distance_field_hint() const; - float draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_char,const CharType& p_next=0,const Color& p_modulate=Color(1,1,1)) const; + float draw_char(RID p_canvas_item, const Point2& p_pos, CharType p_char,CharType p_next=0,const Color& p_modulate=Color(1,1,1)) const; BitmapFont(); ~BitmapFont(); diff --git a/scene/resources/room.cpp b/scene/resources/room.cpp index d1fc614c90..f28220531b 100644 --- a/scene/resources/room.cpp +++ b/scene/resources/room.cpp @@ -52,7 +52,7 @@ void RoomBounds::set_geometry_hint(const DVector<Face3>& p_geometry_hint) { geometry_hint=p_geometry_hint; } -const DVector<Face3>& RoomBounds::get_geometry_hint() const { +DVector<Face3> RoomBounds::get_geometry_hint() const { return geometry_hint; } diff --git a/scene/resources/room.h b/scene/resources/room.h index 3ed41a3e61..dc5e284838 100644 --- a/scene/resources/room.h +++ b/scene/resources/room.h @@ -56,7 +56,7 @@ public: BSP_Tree get_bounds() const; void set_geometry_hint(const DVector<Face3>& geometry_hint); - const DVector<Face3>& get_geometry_hint() const; + DVector<Face3> get_geometry_hint() const; RoomBounds(); ~RoomBounds(); diff --git a/servers/audio/audio_server_sw.cpp b/servers/audio/audio_server_sw.cpp index 8b5b5e4f46..853714be2a 100644 --- a/servers/audio/audio_server_sw.cpp +++ b/servers/audio/audio_server_sw.cpp @@ -388,7 +388,7 @@ void AudioServerSW::sample_set_data(RID p_sample, const DVector<uint8_t>& p_buff AUDIO_LOCK sample_manager->sample_set_data(p_sample,p_buffer); } -const DVector<uint8_t> AudioServerSW::sample_get_data(RID p_sample) const { +DVector<uint8_t> AudioServerSW::sample_get_data(RID p_sample) const { AUDIO_LOCK return sample_manager->sample_get_data(p_sample); } diff --git a/servers/audio/audio_server_sw.h b/servers/audio/audio_server_sw.h index 8d3d992e2b..fda952fa94 100644 --- a/servers/audio/audio_server_sw.h +++ b/servers/audio/audio_server_sw.h @@ -126,7 +126,7 @@ public: const void* sample_get_data_ptr(RID p_sample) const; virtual void sample_set_data(RID p_sample, const DVector<uint8_t>& p_buffer); - virtual const DVector<uint8_t> sample_get_data(RID p_sample) const; + virtual DVector<uint8_t> sample_get_data(RID p_sample) const; virtual void sample_set_mix_rate(RID p_sample,int p_rate); virtual int sample_get_mix_rate(RID p_sample) const; diff --git a/servers/audio_server.h b/servers/audio_server.h index c56820dcbb..50194af4a5 100644 --- a/servers/audio_server.h +++ b/servers/audio_server.h @@ -169,7 +169,7 @@ public: virtual void sample_set_signed_data(RID p_sample, const DVector<float>& p_buffer); virtual void sample_set_data(RID p_sample, const DVector<uint8_t>& p_buffer)=0; - virtual const DVector<uint8_t> sample_get_data(RID p_sample) const=0; + virtual DVector<uint8_t> sample_get_data(RID p_sample) const=0; virtual void sample_set_mix_rate(RID p_sample,int p_rate)=0; virtual int sample_get_mix_rate(RID p_sample) const=0; diff --git a/tools/editor/editor_file_dialog.cpp b/tools/editor/editor_file_dialog.cpp index a55c835787..e68a53659b 100644 --- a/tools/editor/editor_file_dialog.cpp +++ b/tools/editor/editor_file_dialog.cpp @@ -466,10 +466,7 @@ void EditorFileDialog::_item_dc_selected(int p_item) { if (d["dir"]) { - //print_line("change dir: "+String(d["name"])); dir_access->change_dir(d["name"]); - if (mode==MODE_OPEN_FILE || mode==MODE_OPEN_FILES || mode==MODE_OPEN_DIR || MODE_OPEN_ANY) - file->set_text(""); call_deferred("_update_file_list"); call_deferred("_update_dir"); diff --git a/tools/editor/editor_settings.cpp b/tools/editor/editor_settings.cpp index 457aecba4a..b89863289a 100644 --- a/tools/editor/editor_settings.cpp +++ b/tools/editor/editor_settings.cpp @@ -423,7 +423,7 @@ void EditorSettings::setup_network() { if (ip=="127.0.0.1") continue; - if (lip!="") + if (lip=="") lip=ip; if (ip==current) lip=current; //so it saves diff --git a/tools/editor/plugins/script_editor_plugin.cpp b/tools/editor/plugins/script_editor_plugin.cpp index 7ecd2951d4..10e4fc8475 100644 --- a/tools/editor/plugins/script_editor_plugin.cpp +++ b/tools/editor/plugins/script_editor_plugin.cpp @@ -1138,6 +1138,7 @@ void ScriptEditor::_menu_option(int p_option) { if (trim_trailing_whitespace_on_save) { _trim_trailing_whitespace(current->get_text_edit()); } + editor->push_item(current->get_edited_script()->cast_to<Object>()); editor->save_resource_as( current->get_edited_script() ); } break; |
