diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-ot-cff-common.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-ot-cff-common.hh | 622 |
1 files changed, 622 insertions, 0 deletions
diff --git a/thirdparty/harfbuzz/src/hb-ot-cff-common.hh b/thirdparty/harfbuzz/src/hb-ot-cff-common.hh new file mode 100644 index 0000000000..864a27f458 --- /dev/null +++ b/thirdparty/harfbuzz/src/hb-ot-cff-common.hh @@ -0,0 +1,622 @@ +/* + * Copyright © 2018 Adobe Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Adobe Author(s): Michiharu Ariza + */ +#ifndef HB_OT_CFF_COMMON_HH +#define HB_OT_CFF_COMMON_HH + +#include "hb-open-type.hh" +#include "hb-bimap.hh" +#include "hb-ot-layout-common.hh" +#include "hb-cff-interp-dict-common.hh" +#include "hb-subset-plan.hh" + +namespace CFF { + +using namespace OT; + +#define CFF_UNDEF_CODE 0xFFFFFFFF + +using objidx_t = hb_serialize_context_t::objidx_t; +using whence_t = hb_serialize_context_t::whence_t; + +/* utility macro */ +template<typename Type> +static inline const Type& StructAtOffsetOrNull (const void *P, unsigned int offset) +{ return offset ? StructAtOffset<Type> (P, offset) : Null (Type); } + +inline unsigned int calcOffSize (unsigned int dataSize) +{ + unsigned int size = 1; + unsigned int offset = dataSize + 1; + while (offset & ~0xFF) + { + size++; + offset >>= 8; + } + /* format does not support size > 4; caller should handle it as an error */ + return size; +} + +struct code_pair_t +{ + hb_codepoint_t code; + hb_codepoint_t glyph; +}; + +typedef hb_vector_t<unsigned char> str_buff_t; +struct str_buff_vec_t : hb_vector_t<str_buff_t> +{ + void fini () { SUPER::fini_deep (); } + + unsigned int total_size () const + { + unsigned int size = 0; + for (unsigned int i = 0; i < length; i++) + size += (*this)[i].length; + return size; + } + + private: + typedef hb_vector_t<str_buff_t> SUPER; +}; + +/* CFF INDEX */ +template <typename COUNT> +struct CFFIndex +{ + static unsigned int calculate_offset_array_size (unsigned int offSize, unsigned int count) + { return offSize * (count + 1); } + + unsigned int offset_array_size () const + { return calculate_offset_array_size (offSize, count); } + + CFFIndex *copy (hb_serialize_context_t *c) const + { + TRACE_SERIALIZE (this); + unsigned int size = get_size (); + CFFIndex *out = c->allocate_size<CFFIndex> (size); + if (likely (out)) + memcpy (out, this, size); + return_trace (out); + } + + bool serialize (hb_serialize_context_t *c, const CFFIndex &src) + { + TRACE_SERIALIZE (this); + unsigned int size = src.get_size (); + CFFIndex *dest = c->allocate_size<CFFIndex> (size); + if (unlikely (!dest)) return_trace (false); + memcpy (dest, &src, size); + return_trace (true); + } + + bool serialize (hb_serialize_context_t *c, + unsigned int offSize_, + const byte_str_array_t &byteArray) + { + TRACE_SERIALIZE (this); + if (byteArray.length == 0) + { + COUNT *dest = c->allocate_min<COUNT> (); + if (unlikely (!dest)) return_trace (false); + *dest = 0; + } + else + { + /* serialize CFFIndex header */ + if (unlikely (!c->extend_min (*this))) return_trace (false); + this->count = byteArray.length; + this->offSize = offSize_; + if (unlikely (!c->allocate_size<HBUINT8> (offSize_ * (byteArray.length + 1)))) + return_trace (false); + + /* serialize indices */ + unsigned int offset = 1; + unsigned int i = 0; + for (; i < byteArray.length; i++) + { + set_offset_at (i, offset); + offset += byteArray[i].get_size (); + } + set_offset_at (i, offset); + + /* serialize data */ + for (unsigned int i = 0; i < byteArray.length; i++) + { + const byte_str_t &bs = byteArray[i]; + unsigned char *dest = c->allocate_size<unsigned char> (bs.length); + if (unlikely (!dest)) return_trace (false); + memcpy (dest, &bs[0], bs.length); + } + } + return_trace (true); + } + + bool serialize (hb_serialize_context_t *c, + unsigned int offSize_, + const str_buff_vec_t &buffArray) + { + byte_str_array_t byteArray; + byteArray.init (); + byteArray.resize (buffArray.length); + for (unsigned int i = 0; i < byteArray.length; i++) + byteArray[i] = byte_str_t (buffArray[i].arrayZ, buffArray[i].length); + bool result = this->serialize (c, offSize_, byteArray); + byteArray.fini (); + return result; + } + + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool serialize (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + if (it.len () == 0) + { + COUNT *dest = c->allocate_min<COUNT> (); + if (unlikely (!dest)) return_trace (false); + *dest = 0; + } + else + { + serialize_header(c, + it | hb_map ([] (const byte_str_t &_) { return _.length; })); + for (const auto &_ : +it) + _.copy (c); + } + return_trace (true); + } + + bool serialize (hb_serialize_context_t *c, + const byte_str_array_t &byteArray) + { return serialize (c, + hb_iter (byteArray)); } + + bool serialize (hb_serialize_context_t *c, + const str_buff_vec_t &buffArray) + { + auto it = + + hb_iter (buffArray) + | hb_map ([] (const str_buff_t &_) { return byte_str_t (_.arrayZ, _.length); }) + ; + return serialize (c, it); + } + + template <typename Iterator, + hb_requires (hb_is_iterator (Iterator))> + bool serialize_header (hb_serialize_context_t *c, + Iterator it) + { + TRACE_SERIALIZE (this); + + unsigned total = + it | hb_reduce (hb_add, 0); + unsigned off_size = calcOffSize (total); + + /* serialize CFFIndex header */ + if (unlikely (!c->extend_min (*this))) return_trace (false); + this->count = it.len (); + this->offSize = off_size; + if (unlikely (!c->allocate_size<HBUINT8> (off_size * (it.len () + 1)))) + return_trace (false); + + /* serialize indices */ + unsigned int offset = 1; + unsigned int i = 0; + for (unsigned _ : +it) + { + CFFIndex<COUNT>::set_offset_at (i++, offset); + offset += _; + } + CFFIndex<COUNT>::set_offset_at (i, offset); + + return_trace (true); + } + + void set_offset_at (unsigned int index, unsigned int offset) + { + HBUINT8 *p = offsets + offSize * index + offSize; + unsigned int size = offSize; + for (; size; size--) + { + --p; + *p = offset & 0xFF; + offset >>= 8; + } + } + + unsigned int offset_at (unsigned int index) const + { + assert (index <= count); + const HBUINT8 *p = offsets + offSize * index; + unsigned int size = offSize; + unsigned int offset = 0; + for (; size; size--) + offset = (offset << 8) + *p++; + return offset; + } + + unsigned int length_at (unsigned int index) const + { + if (unlikely ((offset_at (index + 1) < offset_at (index)) || + (offset_at (index + 1) > offset_at (count)))) + return 0; + return offset_at (index + 1) - offset_at (index); + } + + const unsigned char *data_base () const + { return (const unsigned char *) this + min_size + offset_array_size (); } + + unsigned int data_size () const { return HBINT8::static_size; } + + byte_str_t operator [] (unsigned int index) const + { + if (unlikely (index >= count)) return Null (byte_str_t); + return byte_str_t (data_base () + offset_at (index) - 1, length_at (index)); + } + + unsigned int get_size () const + { + if (this == &Null (CFFIndex)) return 0; + if (count > 0) + return min_size + offset_array_size () + (offset_at (count) - 1); + return count.static_size; /* empty CFFIndex contains count only */ + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (likely ((c->check_struct (this) && count == 0) || /* empty INDEX */ + (c->check_struct (this) && offSize >= 1 && offSize <= 4 && + c->check_array (offsets, offSize, count + 1) && + c->check_array ((const HBUINT8*) data_base (), 1, max_offset () - 1)))); + } + + protected: + unsigned int max_offset () const + { + unsigned int max = 0; + for (unsigned int i = 0; i < count + 1u; i++) + { + unsigned int off = offset_at (i); + if (off > max) max = off; + } + return max; + } + + public: + COUNT count; /* Number of object data. Note there are (count+1) offsets */ + HBUINT8 offSize; /* The byte size of each offset in the offsets array. */ + HBUINT8 offsets[HB_VAR_ARRAY]; + /* The array of (count + 1) offsets into objects array (1-base). */ + /* HBUINT8 data[HB_VAR_ARRAY]; Object data */ + public: + DEFINE_SIZE_ARRAY (COUNT::static_size + HBUINT8::static_size, offsets); +}; + +template <typename COUNT, typename TYPE> +struct CFFIndexOf : CFFIndex<COUNT> +{ + const byte_str_t operator [] (unsigned int index) const + { + if (likely (index < CFFIndex<COUNT>::count)) + return byte_str_t (CFFIndex<COUNT>::data_base () + CFFIndex<COUNT>::offset_at (index) - 1, CFFIndex<COUNT>::length_at (index)); + return Null (byte_str_t); + } + + template <typename DATA, typename PARAM1, typename PARAM2> + bool serialize (hb_serialize_context_t *c, + unsigned int offSize_, + const DATA *dataArray, + unsigned int dataArrayLen, + const hb_vector_t<unsigned int> &dataSizeArray, + const PARAM1 ¶m1, + const PARAM2 ¶m2) + { + TRACE_SERIALIZE (this); + /* serialize CFFIndex header */ + if (unlikely (!c->extend_min (*this))) return_trace (false); + this->count = dataArrayLen; + this->offSize = offSize_; + if (unlikely (!c->allocate_size<HBUINT8> (offSize_ * (dataArrayLen + 1)))) + return_trace (false); + + /* serialize indices */ + unsigned int offset = 1; + unsigned int i = 0; + for (; i < dataArrayLen; i++) + { + CFFIndex<COUNT>::set_offset_at (i, offset); + offset += dataSizeArray[i]; + } + CFFIndex<COUNT>::set_offset_at (i, offset); + + /* serialize data */ + for (unsigned int i = 0; i < dataArrayLen; i++) + { + TYPE *dest = c->start_embed<TYPE> (); + if (unlikely (!dest || !dest->serialize (c, dataArray[i], param1, param2))) + return_trace (false); + } + return_trace (true); + } +}; + +/* Top Dict, Font Dict, Private Dict */ +struct Dict : UnsizedByteStr +{ + template <typename DICTVAL, typename OP_SERIALIZER, typename ...Ts> + bool serialize (hb_serialize_context_t *c, + const DICTVAL &dictval, + OP_SERIALIZER& opszr, + Ts&&... ds) + { + TRACE_SERIALIZE (this); + for (unsigned int i = 0; i < dictval.get_count (); i++) + if (unlikely (!opszr.serialize (c, dictval[i], hb_forward<Ts> (ds)...))) + return_trace (false); + + return_trace (true); + } + + template <typename T, typename V> + static bool serialize_int_op (hb_serialize_context_t *c, op_code_t op, V value, op_code_t intOp) + { + // XXX: not sure why but LLVM fails to compile the following 'unlikely' macro invocation + if (/*unlikely*/ (!serialize_int<T, V> (c, intOp, value))) + return false; + + TRACE_SERIALIZE (this); + /* serialize the opcode */ + HBUINT8 *p = c->allocate_size<HBUINT8> (OpCode_Size (op)); + if (unlikely (!p)) return_trace (false); + if (Is_OpCode_ESC (op)) + { + *p = OpCode_escape; + op = Unmake_OpCode_ESC (op); + p++; + } + *p = op; + return_trace (true); + } + + template <typename V> + static bool serialize_int4_op (hb_serialize_context_t *c, op_code_t op, V value) + { return serialize_int_op<HBINT32> (c, op, value, OpCode_longintdict); } + + template <typename V> + static bool serialize_int2_op (hb_serialize_context_t *c, op_code_t op, V value) + { return serialize_int_op<HBINT16> (c, op, value, OpCode_shortint); } + + template <typename T, int int_op> + static bool serialize_link_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence) + { + T &ofs = *(T *) (c->head + OpCode_Size (int_op)); + if (unlikely (!serialize_int_op<T> (c, op, 0, int_op))) return false; + c->add_link (ofs, link, whence); + return true; + } + + static bool serialize_link4_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence = whence_t::Head) + { return serialize_link_op<HBINT32, OpCode_longintdict> (c, op, link, whence); } + + static bool serialize_link2_op (hb_serialize_context_t *c, op_code_t op, objidx_t link, whence_t whence = whence_t::Head) + { return serialize_link_op<HBINT16, OpCode_shortint> (c, op, link, whence); } +}; + +struct TopDict : Dict {}; +struct FontDict : Dict {}; +struct PrivateDict : Dict {}; + +struct table_info_t +{ + void init () { offset = size = 0; link = 0; } + + unsigned int offset; + unsigned int size; + objidx_t link; +}; + +template <typename COUNT> +struct FDArray : CFFIndexOf<COUNT, FontDict> +{ + template <typename DICTVAL, typename INFO, typename Iterator, typename OP_SERIALIZER> + bool serialize (hb_serialize_context_t *c, + Iterator it, + OP_SERIALIZER& opszr) + { + TRACE_SERIALIZE (this); + + /* serialize INDEX data */ + hb_vector_t<unsigned> sizes; + c->push (); + + it + | hb_map ([&] (const hb_pair_t<const DICTVAL&, const INFO&> &_) + { + FontDict *dict = c->start_embed<FontDict> (); + dict->serialize (c, _.first, opszr, _.second); + return c->head - (const char*)dict; + }) + | hb_sink (sizes) + ; + c->pop_pack (false); + + /* serialize INDEX header */ + return_trace (CFFIndex<COUNT>::serialize_header (c, hb_iter (sizes))); + } +}; + +/* FDSelect */ +struct FDSelect0 { + bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + if (unlikely (!(c->check_struct (this)))) + return_trace (false); + for (unsigned int i = 0; i < c->get_num_glyphs (); i++) + if (unlikely (!fds[i].sanitize (c))) + return_trace (false); + + return_trace (true); + } + + hb_codepoint_t get_fd (hb_codepoint_t glyph) const + { return (hb_codepoint_t) fds[glyph]; } + + unsigned int get_size (unsigned int num_glyphs) const + { return HBUINT8::static_size * num_glyphs; } + + HBUINT8 fds[HB_VAR_ARRAY]; + + DEFINE_SIZE_MIN (0); +}; + +template <typename GID_TYPE, typename FD_TYPE> +struct FDSelect3_4_Range +{ + bool sanitize (hb_sanitize_context_t *c, const void * /*nullptr*/, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + return_trace (first < c->get_num_glyphs () && (fd < fdcount)); + } + + GID_TYPE first; + FD_TYPE fd; + public: + DEFINE_SIZE_STATIC (GID_TYPE::static_size + FD_TYPE::static_size); +}; + +template <typename GID_TYPE, typename FD_TYPE> +struct FDSelect3_4 +{ + unsigned int get_size () const + { return GID_TYPE::static_size * 2 + ranges.get_size (); } + + bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + if (unlikely (!c->check_struct (this) || !ranges.sanitize (c, nullptr, fdcount) || + (nRanges () == 0) || ranges[0].first != 0)) + return_trace (false); + + for (unsigned int i = 1; i < nRanges (); i++) + if (unlikely (ranges[i - 1].first >= ranges[i].first)) + return_trace (false); + + if (unlikely (!sentinel().sanitize (c) || (sentinel() != c->get_num_glyphs ()))) + return_trace (false); + + return_trace (true); + } + + hb_codepoint_t get_fd (hb_codepoint_t glyph) const + { + unsigned int i; + for (i = 1; i < nRanges (); i++) + if (glyph < ranges[i].first) + break; + + return (hb_codepoint_t) ranges[i - 1].fd; + } + + GID_TYPE &nRanges () { return ranges.len; } + GID_TYPE nRanges () const { return ranges.len; } + GID_TYPE &sentinel () { return StructAfter<GID_TYPE> (ranges[nRanges () - 1]); } + const GID_TYPE &sentinel () const { return StructAfter<GID_TYPE> (ranges[nRanges () - 1]); } + + ArrayOf<FDSelect3_4_Range<GID_TYPE, FD_TYPE>, GID_TYPE> ranges; + /* GID_TYPE sentinel */ + + DEFINE_SIZE_ARRAY (GID_TYPE::static_size, ranges); +}; + +typedef FDSelect3_4<HBUINT16, HBUINT8> FDSelect3; +typedef FDSelect3_4_Range<HBUINT16, HBUINT8> FDSelect3_Range; + +struct FDSelect +{ + bool serialize (hb_serialize_context_t *c, const FDSelect &src, unsigned int num_glyphs) + { + TRACE_SERIALIZE (this); + unsigned int size = src.get_size (num_glyphs); + FDSelect *dest = c->allocate_size<FDSelect> (size); + if (unlikely (!dest)) return_trace (false); + memcpy (dest, &src, size); + return_trace (true); + } + + unsigned int get_size (unsigned int num_glyphs) const + { + switch (format) + { + case 0: return format.static_size + u.format0.get_size (num_glyphs); + case 3: return format.static_size + u.format3.get_size (); + default:return 0; + } + } + + hb_codepoint_t get_fd (hb_codepoint_t glyph) const + { + if (this == &Null (FDSelect)) return 0; + + switch (format) + { + case 0: return u.format0.get_fd (glyph); + case 3: return u.format3.get_fd (glyph); + default:return 0; + } + } + + bool sanitize (hb_sanitize_context_t *c, unsigned int fdcount) const + { + TRACE_SANITIZE (this); + if (unlikely (!c->check_struct (this))) + return_trace (false); + + switch (format) + { + case 0: return_trace (u.format0.sanitize (c, fdcount)); + case 3: return_trace (u.format3.sanitize (c, fdcount)); + default:return_trace (false); + } + } + + HBUINT8 format; + union { + FDSelect0 format0; + FDSelect3 format3; + } u; + public: + DEFINE_SIZE_MIN (1); +}; + +template <typename COUNT> +struct Subrs : CFFIndex<COUNT> +{ + typedef COUNT count_type; + typedef CFFIndex<COUNT> SUPER; +}; + +} /* namespace CFF */ + +#endif /* HB_OT_CFF_COMMON_HH */ |