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Diffstat (limited to 'thirdparty/harfbuzz/src/hb-ot-cff1-table.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-ot-cff1-table.hh | 1403 |
1 files changed, 1403 insertions, 0 deletions
diff --git a/thirdparty/harfbuzz/src/hb-ot-cff1-table.hh b/thirdparty/harfbuzz/src/hb-ot-cff1-table.hh new file mode 100644 index 0000000000..7228f77727 --- /dev/null +++ b/thirdparty/harfbuzz/src/hb-ot-cff1-table.hh @@ -0,0 +1,1403 @@ +/* + * 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_CFF1_TABLE_HH +#define HB_OT_CFF1_TABLE_HH + +#include "hb-ot-cff-common.hh" +#include "hb-subset-cff1.hh" +#include "hb-draw.hh" + +#define HB_STRING_ARRAY_NAME cff1_std_strings +#define HB_STRING_ARRAY_LIST "hb-ot-cff1-std-str.hh" +#include "hb-string-array.hh" +#undef HB_STRING_ARRAY_LIST +#undef HB_STRING_ARRAY_NAME + +namespace CFF { + +/* + * CFF -- Compact Font Format (CFF) + * https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5176.CFF.pdf + */ +#define HB_OT_TAG_cff1 HB_TAG('C','F','F',' ') + +#define CFF_UNDEF_SID CFF_UNDEF_CODE + +enum EncodingID { StandardEncoding = 0, ExpertEncoding = 1 }; +enum CharsetID { ISOAdobeCharset = 0, ExpertCharset = 1, ExpertSubsetCharset = 2 }; + +typedef CFFIndex<HBUINT16> CFF1Index; +template <typename Type> struct CFF1IndexOf : CFFIndexOf<HBUINT16, Type> {}; + +typedef CFFIndex<HBUINT16> CFF1Index; +typedef CFF1Index CFF1CharStrings; +typedef Subrs<HBUINT16> CFF1Subrs; + +struct CFF1FDSelect : FDSelect {}; + +/* Encoding */ +struct Encoding0 { + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (codes.sanitize (c)); + } + + hb_codepoint_t get_code (hb_codepoint_t glyph) const + { + assert (glyph > 0); + glyph--; + if (glyph < nCodes ()) + { + return (hb_codepoint_t)codes[glyph]; + } + else + return CFF_UNDEF_CODE; + } + + HBUINT8 &nCodes () { return codes.len; } + HBUINT8 nCodes () const { return codes.len; } + + ArrayOf<HBUINT8, HBUINT8> codes; + + DEFINE_SIZE_ARRAY_SIZED (1, codes); +}; + +struct Encoding1_Range { + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + HBUINT8 first; + HBUINT8 nLeft; + + DEFINE_SIZE_STATIC (2); +}; + +struct Encoding1 { + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (ranges.sanitize (c)); + } + + hb_codepoint_t get_code (hb_codepoint_t glyph) const + { + assert (glyph > 0); + glyph--; + for (unsigned int i = 0; i < nRanges (); i++) + { + if (glyph <= ranges[i].nLeft) + { + hb_codepoint_t code = (hb_codepoint_t) ranges[i].first + glyph; + return (likely (code < 0x100) ? code: CFF_UNDEF_CODE); + } + glyph -= (ranges[i].nLeft + 1); + } + return CFF_UNDEF_CODE; + } + + HBUINT8 &nRanges () { return ranges.len; } + HBUINT8 nRanges () const { return ranges.len; } + + ArrayOf<Encoding1_Range, HBUINT8> ranges; + + DEFINE_SIZE_ARRAY_SIZED (1, ranges); +}; + +struct SuppEncoding { + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + HBUINT8 code; + HBUINT16 glyph; + + DEFINE_SIZE_STATIC (3); +}; + +struct CFF1SuppEncData { + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (supps.sanitize (c)); + } + + void get_codes (hb_codepoint_t sid, hb_vector_t<hb_codepoint_t> &codes) const + { + for (unsigned int i = 0; i < nSups (); i++) + if (sid == supps[i].glyph) + codes.push (supps[i].code); + } + + HBUINT8 &nSups () { return supps.len; } + HBUINT8 nSups () const { return supps.len; } + + ArrayOf<SuppEncoding, HBUINT8> supps; + + DEFINE_SIZE_ARRAY_SIZED (1, supps); +}; + +struct Encoding +{ + /* serialize a fullset Encoding */ + bool serialize (hb_serialize_context_t *c, const Encoding &src) + { + TRACE_SERIALIZE (this); + unsigned int size = src.get_size (); + Encoding *dest = c->allocate_size<Encoding> (size); + if (unlikely (!dest)) return_trace (false); + memcpy (dest, &src, size); + return_trace (true); + } + + /* serialize a subset Encoding */ + bool serialize (hb_serialize_context_t *c, + uint8_t format, + unsigned int enc_count, + const hb_vector_t<code_pair_t>& code_ranges, + const hb_vector_t<code_pair_t>& supp_codes) + { + TRACE_SERIALIZE (this); + Encoding *dest = c->extend_min (*this); + if (unlikely (!dest)) return_trace (false); + dest->format = format | ((supp_codes.length > 0) ? 0x80 : 0); + switch (format) { + case 0: + { + Encoding0 *fmt0 = c->allocate_size<Encoding0> (Encoding0::min_size + HBUINT8::static_size * enc_count); + if (unlikely (!fmt0)) return_trace (false); + fmt0->nCodes () = enc_count; + unsigned int glyph = 0; + for (unsigned int i = 0; i < code_ranges.length; i++) + { + hb_codepoint_t code = code_ranges[i].code; + for (int left = (int)code_ranges[i].glyph; left >= 0; left--) + fmt0->codes[glyph++] = code++; + if (unlikely (!((glyph <= 0x100) && (code <= 0x100)))) + return_trace (false); + } + } + break; + + case 1: + { + Encoding1 *fmt1 = c->allocate_size<Encoding1> (Encoding1::min_size + Encoding1_Range::static_size * code_ranges.length); + if (unlikely (!fmt1)) return_trace (false); + fmt1->nRanges () = code_ranges.length; + for (unsigned int i = 0; i < code_ranges.length; i++) + { + if (unlikely (!((code_ranges[i].code <= 0xFF) && (code_ranges[i].glyph <= 0xFF)))) + return_trace (false); + fmt1->ranges[i].first = code_ranges[i].code; + fmt1->ranges[i].nLeft = code_ranges[i].glyph; + } + } + break; + + } + + if (supp_codes.length) + { + CFF1SuppEncData *suppData = c->allocate_size<CFF1SuppEncData> (CFF1SuppEncData::min_size + SuppEncoding::static_size * supp_codes.length); + if (unlikely (!suppData)) return_trace (false); + suppData->nSups () = supp_codes.length; + for (unsigned int i = 0; i < supp_codes.length; i++) + { + suppData->supps[i].code = supp_codes[i].code; + suppData->supps[i].glyph = supp_codes[i].glyph; /* actually SID */ + } + } + + return_trace (true); + } + + unsigned int get_size () const + { + unsigned int size = min_size; + switch (table_format ()) + { + case 0: size += u.format0.get_size (); break; + case 1: size += u.format1.get_size (); break; + } + if (has_supplement ()) + size += suppEncData ().get_size (); + return size; + } + + hb_codepoint_t get_code (hb_codepoint_t glyph) const + { + switch (table_format ()) + { + case 0: return u.format0.get_code (glyph); + case 1: return u.format1.get_code (glyph); + default:return 0; + } + } + + uint8_t table_format () const { return format & 0x7F; } + bool has_supplement () const { return format & 0x80; } + + void get_supplement_codes (hb_codepoint_t sid, hb_vector_t<hb_codepoint_t> &codes) const + { + codes.resize (0); + if (has_supplement ()) + suppEncData().get_codes (sid, codes); + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (unlikely (!c->check_struct (this))) + return_trace (false); + + switch (table_format ()) + { + case 0: if (unlikely (!u.format0.sanitize (c))) { return_trace (false); } break; + case 1: if (unlikely (!u.format1.sanitize (c))) { return_trace (false); } break; + default:return_trace (false); + } + return_trace (likely (!has_supplement () || suppEncData ().sanitize (c))); + } + + protected: + const CFF1SuppEncData &suppEncData () const + { + switch (table_format ()) + { + case 0: return StructAfter<CFF1SuppEncData> (u.format0.codes[u.format0.nCodes ()-1]); + case 1: return StructAfter<CFF1SuppEncData> (u.format1.ranges[u.format1.nRanges ()-1]); + default:return Null (CFF1SuppEncData); + } + } + + public: + HBUINT8 format; + union { + Encoding0 format0; + Encoding1 format1; + } u; + /* CFF1SuppEncData suppEncData; */ + + DEFINE_SIZE_MIN (1); +}; + +/* Charset */ +struct Charset0 { + bool sanitize (hb_sanitize_context_t *c, unsigned int num_glyphs) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && sids[num_glyphs - 1].sanitize (c)); + } + + hb_codepoint_t get_sid (hb_codepoint_t glyph) const + { + if (glyph == 0) + return 0; + else + return sids[glyph - 1]; + } + + hb_codepoint_t get_glyph (hb_codepoint_t sid, unsigned int num_glyphs) const + { + if (sid == 0) + return 0; + + for (unsigned int glyph = 1; glyph < num_glyphs; glyph++) + { + if (sids[glyph-1] == sid) + return glyph; + } + return 0; + } + + unsigned int get_size (unsigned int num_glyphs) const + { + assert (num_glyphs > 0); + return HBUINT16::static_size * (num_glyphs - 1); + } + + HBUINT16 sids[HB_VAR_ARRAY]; + + DEFINE_SIZE_ARRAY(0, sids); +}; + +template <typename TYPE> +struct Charset_Range { + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + HBUINT16 first; + TYPE nLeft; + + DEFINE_SIZE_STATIC (HBUINT16::static_size + TYPE::static_size); +}; + +template <typename TYPE> +struct Charset1_2 { + bool sanitize (hb_sanitize_context_t *c, unsigned int num_glyphs) const + { + TRACE_SANITIZE (this); + if (unlikely (!c->check_struct (this))) + return_trace (false); + num_glyphs--; + for (unsigned int i = 0; num_glyphs > 0; i++) + { + if (unlikely (!ranges[i].sanitize (c) || (num_glyphs < ranges[i].nLeft + 1))) + return_trace (false); + num_glyphs -= (ranges[i].nLeft + 1); + } + return_trace (true); + } + + hb_codepoint_t get_sid (hb_codepoint_t glyph) const + { + if (glyph == 0) return 0; + glyph--; + for (unsigned int i = 0;; i++) + { + if (glyph <= ranges[i].nLeft) + return (hb_codepoint_t)ranges[i].first + glyph; + glyph -= (ranges[i].nLeft + 1); + } + + return 0; + } + + hb_codepoint_t get_glyph (hb_codepoint_t sid, unsigned int num_glyphs) const + { + if (sid == 0) return 0; + hb_codepoint_t glyph = 1; + for (unsigned int i = 0;; i++) + { + if (glyph >= num_glyphs) + return 0; + if ((ranges[i].first <= sid) && (sid <= ranges[i].first + ranges[i].nLeft)) + return glyph + (sid - ranges[i].first); + glyph += (ranges[i].nLeft + 1); + } + + return 0; + } + + unsigned int get_size (unsigned int num_glyphs) const + { + unsigned int size = HBUINT8::static_size; + int glyph = (int)num_glyphs; + + assert (glyph > 0); + glyph--; + for (unsigned int i = 0; glyph > 0; i++) + { + glyph -= (ranges[i].nLeft + 1); + size += Charset_Range<TYPE>::static_size; + } + + return size; + } + + Charset_Range<TYPE> ranges[HB_VAR_ARRAY]; + + DEFINE_SIZE_ARRAY (0, ranges); +}; + +typedef Charset1_2<HBUINT8> Charset1; +typedef Charset1_2<HBUINT16> Charset2; +typedef Charset_Range<HBUINT8> Charset1_Range; +typedef Charset_Range<HBUINT16> Charset2_Range; + +struct Charset +{ + /* serialize a fullset Charset */ + bool serialize (hb_serialize_context_t *c, const Charset &src, unsigned int num_glyphs) + { + TRACE_SERIALIZE (this); + unsigned int size = src.get_size (num_glyphs); + Charset *dest = c->allocate_size<Charset> (size); + if (unlikely (!dest)) return_trace (false); + memcpy (dest, &src, size); + return_trace (true); + } + + /* serialize a subset Charset */ + bool serialize (hb_serialize_context_t *c, + uint8_t format, + unsigned int num_glyphs, + const hb_vector_t<code_pair_t>& sid_ranges) + { + TRACE_SERIALIZE (this); + Charset *dest = c->extend_min (*this); + if (unlikely (!dest)) return_trace (false); + dest->format = format; + switch (format) + { + case 0: + { + Charset0 *fmt0 = c->allocate_size<Charset0> (Charset0::min_size + HBUINT16::static_size * (num_glyphs - 1)); + if (unlikely (!fmt0)) return_trace (false); + unsigned int glyph = 0; + for (unsigned int i = 0; i < sid_ranges.length; i++) + { + hb_codepoint_t sid = sid_ranges[i].code; + for (int left = (int)sid_ranges[i].glyph; left >= 0; left--) + fmt0->sids[glyph++] = sid++; + } + } + break; + + case 1: + { + Charset1 *fmt1 = c->allocate_size<Charset1> (Charset1::min_size + Charset1_Range::static_size * sid_ranges.length); + if (unlikely (!fmt1)) return_trace (false); + for (unsigned int i = 0; i < sid_ranges.length; i++) + { + if (unlikely (!(sid_ranges[i].glyph <= 0xFF))) + return_trace (false); + fmt1->ranges[i].first = sid_ranges[i].code; + fmt1->ranges[i].nLeft = sid_ranges[i].glyph; + } + } + break; + + case 2: + { + Charset2 *fmt2 = c->allocate_size<Charset2> (Charset2::min_size + Charset2_Range::static_size * sid_ranges.length); + if (unlikely (!fmt2)) return_trace (false); + for (unsigned int i = 0; i < sid_ranges.length; i++) + { + if (unlikely (!(sid_ranges[i].glyph <= 0xFFFF))) + return_trace (false); + fmt2->ranges[i].first = sid_ranges[i].code; + fmt2->ranges[i].nLeft = sid_ranges[i].glyph; + } + } + break; + + } + return_trace (true); + } + + unsigned int get_size (unsigned int num_glyphs) const + { + switch (format) + { + case 0: return min_size + u.format0.get_size (num_glyphs); + case 1: return min_size + u.format1.get_size (num_glyphs); + case 2: return min_size + u.format2.get_size (num_glyphs); + default:return 0; + } + } + + hb_codepoint_t get_sid (hb_codepoint_t glyph, unsigned int num_glyphs) const + { + if (unlikely (glyph >= num_glyphs)) return 0; + switch (format) + { + case 0: return u.format0.get_sid (glyph); + case 1: return u.format1.get_sid (glyph); + case 2: return u.format2.get_sid (glyph); + default:return 0; + } + } + + hb_codepoint_t get_glyph (hb_codepoint_t sid, unsigned int num_glyphs) const + { + switch (format) + { + case 0: return u.format0.get_glyph (sid, num_glyphs); + case 1: return u.format1.get_glyph (sid, num_glyphs); + case 2: return u.format2.get_glyph (sid, num_glyphs); + default:return 0; + } + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (unlikely (!c->check_struct (this))) + return_trace (false); + + switch (format) + { + case 0: return_trace (u.format0.sanitize (c, c->get_num_glyphs ())); + case 1: return_trace (u.format1.sanitize (c, c->get_num_glyphs ())); + case 2: return_trace (u.format2.sanitize (c, c->get_num_glyphs ())); + default:return_trace (false); + } + } + + HBUINT8 format; + union { + Charset0 format0; + Charset1 format1; + Charset2 format2; + } u; + + DEFINE_SIZE_MIN (1); +}; + +struct CFF1StringIndex : CFF1Index +{ + bool serialize (hb_serialize_context_t *c, const CFF1StringIndex &strings, + const hb_inc_bimap_t &sidmap) + { + TRACE_SERIALIZE (this); + if (unlikely ((strings.count == 0) || (sidmap.get_population () == 0))) + { + if (unlikely (!c->extend_min (this->count))) + return_trace (false); + count = 0; + return_trace (true); + } + + byte_str_array_t bytesArray; + bytesArray.init (); + if (!bytesArray.resize (sidmap.get_population ())) + return_trace (false); + for (unsigned int i = 0; i < strings.count; i++) + { + hb_codepoint_t j = sidmap[i]; + if (j != HB_MAP_VALUE_INVALID) + bytesArray[j] = strings[i]; + } + + bool result = CFF1Index::serialize (c, bytesArray); + bytesArray.fini (); + return_trace (result); + } +}; + +struct cff1_top_dict_interp_env_t : num_interp_env_t +{ + cff1_top_dict_interp_env_t () + : num_interp_env_t(), prev_offset(0), last_offset(0) {} + + unsigned int prev_offset; + unsigned int last_offset; +}; + +struct name_dict_values_t +{ + enum name_dict_val_index_t + { + version, + notice, + copyright, + fullName, + familyName, + weight, + postscript, + fontName, + baseFontName, + registry, + ordering, + + ValCount + }; + + void init () + { + for (unsigned int i = 0; i < ValCount; i++) + values[i] = CFF_UNDEF_SID; + } + + unsigned int& operator[] (unsigned int i) + { assert (i < ValCount); return values[i]; } + + unsigned int operator[] (unsigned int i) const + { assert (i < ValCount); return values[i]; } + + static enum name_dict_val_index_t name_op_to_index (op_code_t op) + { + switch (op) { + default: // can't happen - just make some compiler happy + case OpCode_version: + return version; + case OpCode_Notice: + return notice; + case OpCode_Copyright: + return copyright; + case OpCode_FullName: + return fullName; + case OpCode_FamilyName: + return familyName; + case OpCode_Weight: + return weight; + case OpCode_PostScript: + return postscript; + case OpCode_FontName: + return fontName; + case OpCode_BaseFontName: + return baseFontName; + } + } + + unsigned int values[ValCount]; +}; + +struct cff1_top_dict_val_t : op_str_t +{ + unsigned int last_arg_offset; +}; + +struct cff1_top_dict_values_t : top_dict_values_t<cff1_top_dict_val_t> +{ + void init () + { + top_dict_values_t<cff1_top_dict_val_t>::init (); + + nameSIDs.init (); + ros_supplement = 0; + cidCount = 8720; + EncodingOffset = 0; + CharsetOffset = 0; + FDSelectOffset = 0; + privateDictInfo.init (); + } + void fini () { top_dict_values_t<cff1_top_dict_val_t>::fini (); } + + bool is_CID () const + { return nameSIDs[name_dict_values_t::registry] != CFF_UNDEF_SID; } + + name_dict_values_t nameSIDs; + unsigned int ros_supplement_offset; + unsigned int ros_supplement; + unsigned int cidCount; + + unsigned int EncodingOffset; + unsigned int CharsetOffset; + unsigned int FDSelectOffset; + table_info_t privateDictInfo; +}; + +struct cff1_top_dict_opset_t : top_dict_opset_t<cff1_top_dict_val_t> +{ + static void process_op (op_code_t op, cff1_top_dict_interp_env_t& env, cff1_top_dict_values_t& dictval) + { + cff1_top_dict_val_t val; + val.last_arg_offset = (env.last_offset-1) - dictval.opStart; /* offset to the last argument */ + + switch (op) { + case OpCode_version: + case OpCode_Notice: + case OpCode_Copyright: + case OpCode_FullName: + case OpCode_FamilyName: + case OpCode_Weight: + case OpCode_PostScript: + case OpCode_BaseFontName: + dictval.nameSIDs[name_dict_values_t::name_op_to_index (op)] = env.argStack.pop_uint (); + env.clear_args (); + break; + case OpCode_isFixedPitch: + case OpCode_ItalicAngle: + case OpCode_UnderlinePosition: + case OpCode_UnderlineThickness: + case OpCode_PaintType: + case OpCode_CharstringType: + case OpCode_UniqueID: + case OpCode_StrokeWidth: + case OpCode_SyntheticBase: + case OpCode_CIDFontVersion: + case OpCode_CIDFontRevision: + case OpCode_CIDFontType: + case OpCode_UIDBase: + case OpCode_FontBBox: + case OpCode_XUID: + case OpCode_BaseFontBlend: + env.clear_args (); + break; + + case OpCode_CIDCount: + dictval.cidCount = env.argStack.pop_uint (); + env.clear_args (); + break; + + case OpCode_ROS: + dictval.ros_supplement = env.argStack.pop_uint (); + dictval.nameSIDs[name_dict_values_t::ordering] = env.argStack.pop_uint (); + dictval.nameSIDs[name_dict_values_t::registry] = env.argStack.pop_uint (); + env.clear_args (); + break; + + case OpCode_Encoding: + dictval.EncodingOffset = env.argStack.pop_uint (); + env.clear_args (); + if (unlikely (dictval.EncodingOffset == 0)) return; + break; + + case OpCode_charset: + dictval.CharsetOffset = env.argStack.pop_uint (); + env.clear_args (); + if (unlikely (dictval.CharsetOffset == 0)) return; + break; + + case OpCode_FDSelect: + dictval.FDSelectOffset = env.argStack.pop_uint (); + env.clear_args (); + break; + + case OpCode_Private: + dictval.privateDictInfo.offset = env.argStack.pop_uint (); + dictval.privateDictInfo.size = env.argStack.pop_uint (); + env.clear_args (); + break; + + default: + env.last_offset = env.str_ref.offset; + top_dict_opset_t<cff1_top_dict_val_t>::process_op (op, env, dictval); + /* Record this operand below if stack is empty, otherwise done */ + if (!env.argStack.is_empty ()) return; + break; + } + + if (unlikely (env.in_error ())) return; + + dictval.add_op (op, env.str_ref, val); + } +}; + +struct cff1_font_dict_values_t : dict_values_t<op_str_t> +{ + void init () + { + dict_values_t<op_str_t>::init (); + privateDictInfo.init (); + fontName = CFF_UNDEF_SID; + } + void fini () { dict_values_t<op_str_t>::fini (); } + + table_info_t privateDictInfo; + unsigned int fontName; +}; + +struct cff1_font_dict_opset_t : dict_opset_t +{ + static void process_op (op_code_t op, num_interp_env_t& env, cff1_font_dict_values_t& dictval) + { + switch (op) { + case OpCode_FontName: + dictval.fontName = env.argStack.pop_uint (); + env.clear_args (); + break; + case OpCode_FontMatrix: + case OpCode_PaintType: + env.clear_args (); + break; + case OpCode_Private: + dictval.privateDictInfo.offset = env.argStack.pop_uint (); + dictval.privateDictInfo.size = env.argStack.pop_uint (); + env.clear_args (); + break; + + default: + dict_opset_t::process_op (op, env); + if (!env.argStack.is_empty ()) return; + break; + } + + if (unlikely (env.in_error ())) return; + + dictval.add_op (op, env.str_ref); + } +}; + +template <typename VAL> +struct cff1_private_dict_values_base_t : dict_values_t<VAL> +{ + void init () + { + dict_values_t<VAL>::init (); + subrsOffset = 0; + localSubrs = &Null (CFF1Subrs); + } + void fini () { dict_values_t<VAL>::fini (); } + + unsigned int subrsOffset; + const CFF1Subrs *localSubrs; +}; + +typedef cff1_private_dict_values_base_t<op_str_t> cff1_private_dict_values_subset_t; +typedef cff1_private_dict_values_base_t<num_dict_val_t> cff1_private_dict_values_t; + +struct cff1_private_dict_opset_t : dict_opset_t +{ + static void process_op (op_code_t op, num_interp_env_t& env, cff1_private_dict_values_t& dictval) + { + num_dict_val_t val; + val.init (); + + switch (op) { + case OpCode_BlueValues: + case OpCode_OtherBlues: + case OpCode_FamilyBlues: + case OpCode_FamilyOtherBlues: + case OpCode_StemSnapH: + case OpCode_StemSnapV: + env.clear_args (); + break; + case OpCode_StdHW: + case OpCode_StdVW: + case OpCode_BlueScale: + case OpCode_BlueShift: + case OpCode_BlueFuzz: + case OpCode_ForceBold: + case OpCode_LanguageGroup: + case OpCode_ExpansionFactor: + case OpCode_initialRandomSeed: + case OpCode_defaultWidthX: + case OpCode_nominalWidthX: + val.single_val = env.argStack.pop_num (); + env.clear_args (); + break; + case OpCode_Subrs: + dictval.subrsOffset = env.argStack.pop_uint (); + env.clear_args (); + break; + + default: + dict_opset_t::process_op (op, env); + if (!env.argStack.is_empty ()) return; + break; + } + + if (unlikely (env.in_error ())) return; + + dictval.add_op (op, env.str_ref, val); + } +}; + +struct cff1_private_dict_opset_subset : dict_opset_t +{ + static void process_op (op_code_t op, num_interp_env_t& env, cff1_private_dict_values_subset_t& dictval) + { + switch (op) { + case OpCode_BlueValues: + case OpCode_OtherBlues: + case OpCode_FamilyBlues: + case OpCode_FamilyOtherBlues: + case OpCode_StemSnapH: + case OpCode_StemSnapV: + case OpCode_StdHW: + case OpCode_StdVW: + case OpCode_BlueScale: + case OpCode_BlueShift: + case OpCode_BlueFuzz: + case OpCode_ForceBold: + case OpCode_LanguageGroup: + case OpCode_ExpansionFactor: + case OpCode_initialRandomSeed: + case OpCode_defaultWidthX: + case OpCode_nominalWidthX: + env.clear_args (); + break; + + case OpCode_Subrs: + dictval.subrsOffset = env.argStack.pop_uint (); + env.clear_args (); + break; + + default: + dict_opset_t::process_op (op, env); + if (!env.argStack.is_empty ()) return; + break; + } + + if (unlikely (env.in_error ())) return; + + dictval.add_op (op, env.str_ref); + } +}; + +typedef dict_interpreter_t<cff1_top_dict_opset_t, cff1_top_dict_values_t, cff1_top_dict_interp_env_t> cff1_top_dict_interpreter_t; +typedef dict_interpreter_t<cff1_font_dict_opset_t, cff1_font_dict_values_t> cff1_font_dict_interpreter_t; + +typedef CFF1Index CFF1NameIndex; +typedef CFF1IndexOf<TopDict> CFF1TopDictIndex; + +struct cff1_font_dict_values_mod_t +{ + cff1_font_dict_values_mod_t() { init (); } + + void init () { init ( &Null (cff1_font_dict_values_t), CFF_UNDEF_SID ); } + + void init (const cff1_font_dict_values_t *base_, + unsigned int fontName_) + { + base = base_; + fontName = fontName_; + privateDictInfo.init (); + } + + unsigned get_count () const { return base->get_count (); } + + const op_str_t &operator [] (unsigned int i) const { return (*base)[i]; } + + const cff1_font_dict_values_t *base; + table_info_t privateDictInfo; + unsigned int fontName; +}; + +struct CFF1FDArray : FDArray<HBUINT16> +{ + /* FDArray::serialize() requires this partial specialization to compile */ + template <typename ITER, typename OP_SERIALIZER> + bool serialize (hb_serialize_context_t *c, ITER it, OP_SERIALIZER& opszr) + { return FDArray<HBUINT16>::serialize<cff1_font_dict_values_mod_t, cff1_font_dict_values_mod_t> (c, it, opszr); } +}; + +} /* namespace CFF */ + +namespace OT { + +using namespace CFF; + +struct cff1 +{ + static constexpr hb_tag_t tableTag = HB_OT_TAG_cff1; + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + likely (version.major == 1)); + } + + template <typename PRIVOPSET, typename PRIVDICTVAL> + struct accelerator_templ_t + { + void init (hb_face_t *face) + { + topDict.init (); + fontDicts.init (); + privateDicts.init (); + + this->blob = sc.reference_table<cff1> (face); + + /* setup for run-time santization */ + sc.init (this->blob); + sc.start_processing (); + + const OT::cff1 *cff = this->blob->template as<OT::cff1> (); + + if (cff == &Null (OT::cff1)) + { fini (); return; } + + nameIndex = &cff->nameIndex (cff); + if ((nameIndex == &Null (CFF1NameIndex)) || !nameIndex->sanitize (&sc)) + { fini (); return; } + + topDictIndex = &StructAtOffset<CFF1TopDictIndex> (nameIndex, nameIndex->get_size ()); + if ((topDictIndex == &Null (CFF1TopDictIndex)) || !topDictIndex->sanitize (&sc) || (topDictIndex->count == 0)) + { fini (); return; } + + { /* parse top dict */ + const byte_str_t topDictStr = (*topDictIndex)[0]; + if (unlikely (!topDictStr.sanitize (&sc))) { fini (); return; } + cff1_top_dict_interpreter_t top_interp; + top_interp.env.init (topDictStr); + topDict.init (); + if (unlikely (!top_interp.interpret (topDict))) { fini (); return; } + } + + if (is_predef_charset ()) + charset = &Null (Charset); + else + { + charset = &StructAtOffsetOrNull<Charset> (cff, topDict.CharsetOffset); + if (unlikely ((charset == &Null (Charset)) || !charset->sanitize (&sc))) { fini (); return; } + } + + fdCount = 1; + if (is_CID ()) + { + fdArray = &StructAtOffsetOrNull<CFF1FDArray> (cff, topDict.FDArrayOffset); + fdSelect = &StructAtOffsetOrNull<CFF1FDSelect> (cff, topDict.FDSelectOffset); + if (unlikely ((fdArray == &Null (CFF1FDArray)) || !fdArray->sanitize (&sc) || + (fdSelect == &Null (CFF1FDSelect)) || !fdSelect->sanitize (&sc, fdArray->count))) + { fini (); return; } + + fdCount = fdArray->count; + } + else + { + fdArray = &Null (CFF1FDArray); + fdSelect = &Null (CFF1FDSelect); + } + + encoding = &Null (Encoding); + if (is_CID ()) + { + if (unlikely (charset == &Null (Charset))) { fini (); return; } + } + else + { + if (!is_predef_encoding ()) + { + encoding = &StructAtOffsetOrNull<Encoding> (cff, topDict.EncodingOffset); + if (unlikely ((encoding == &Null (Encoding)) || !encoding->sanitize (&sc))) { fini (); return; } + } + } + + stringIndex = &StructAtOffset<CFF1StringIndex> (topDictIndex, topDictIndex->get_size ()); + if ((stringIndex == &Null (CFF1StringIndex)) || !stringIndex->sanitize (&sc)) + { fini (); return; } + + globalSubrs = &StructAtOffset<CFF1Subrs> (stringIndex, stringIndex->get_size ()); + if ((globalSubrs != &Null (CFF1Subrs)) && !globalSubrs->sanitize (&sc)) + { fini (); return; } + + charStrings = &StructAtOffsetOrNull<CFF1CharStrings> (cff, topDict.charStringsOffset); + + if ((charStrings == &Null (CFF1CharStrings)) || unlikely (!charStrings->sanitize (&sc))) + { fini (); return; } + + num_glyphs = charStrings->count; + if (num_glyphs != sc.get_num_glyphs ()) + { fini (); return; } + + if (unlikely (!privateDicts.resize (fdCount))) + { fini (); return; } + for (unsigned int i = 0; i < fdCount; i++) + privateDicts[i].init (); + + // parse CID font dicts and gather private dicts + if (is_CID ()) + { + for (unsigned int i = 0; i < fdCount; i++) + { + byte_str_t fontDictStr = (*fdArray)[i]; + if (unlikely (!fontDictStr.sanitize (&sc))) { fini (); return; } + cff1_font_dict_values_t *font; + cff1_font_dict_interpreter_t font_interp; + font_interp.env.init (fontDictStr); + font = fontDicts.push (); + if (unlikely (font == &Crap (cff1_font_dict_values_t))) { fini (); return; } + font->init (); + if (unlikely (!font_interp.interpret (*font))) { fini (); return; } + PRIVDICTVAL *priv = &privateDicts[i]; + const byte_str_t privDictStr (StructAtOffset<UnsizedByteStr> (cff, font->privateDictInfo.offset), font->privateDictInfo.size); + if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; } + dict_interpreter_t<PRIVOPSET, PRIVDICTVAL> priv_interp; + priv_interp.env.init (privDictStr); + priv->init (); + if (unlikely (!priv_interp.interpret (*priv))) { fini (); return; } + + priv->localSubrs = &StructAtOffsetOrNull<CFF1Subrs> (&privDictStr, priv->subrsOffset); + if (priv->localSubrs != &Null (CFF1Subrs) && + unlikely (!priv->localSubrs->sanitize (&sc))) + { fini (); return; } + } + } + else /* non-CID */ + { + cff1_top_dict_values_t *font = &topDict; + PRIVDICTVAL *priv = &privateDicts[0]; + + const byte_str_t privDictStr (StructAtOffset<UnsizedByteStr> (cff, font->privateDictInfo.offset), font->privateDictInfo.size); + if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; } + dict_interpreter_t<PRIVOPSET, PRIVDICTVAL> priv_interp; + priv_interp.env.init (privDictStr); + priv->init (); + if (unlikely (!priv_interp.interpret (*priv))) { fini (); return; } + + priv->localSubrs = &StructAtOffsetOrNull<CFF1Subrs> (&privDictStr, priv->subrsOffset); + if (priv->localSubrs != &Null (CFF1Subrs) && + unlikely (!priv->localSubrs->sanitize (&sc))) + { fini (); return; } + } + } + + void fini () + { + sc.end_processing (); + topDict.fini (); + fontDicts.fini_deep (); + privateDicts.fini_deep (); + hb_blob_destroy (blob); + blob = nullptr; + } + + bool is_valid () const { return blob; } + bool is_CID () const { return topDict.is_CID (); } + + bool is_predef_charset () const { return topDict.CharsetOffset <= ExpertSubsetCharset; } + + unsigned int std_code_to_glyph (hb_codepoint_t code) const + { + hb_codepoint_t sid = lookup_standard_encoding_for_sid (code); + if (unlikely (sid == CFF_UNDEF_SID)) + return 0; + + if (charset != &Null (Charset)) + return charset->get_glyph (sid, num_glyphs); + else if ((topDict.CharsetOffset == ISOAdobeCharset) + && (code <= 228 /*zcaron*/)) return sid; + return 0; + } + + bool is_predef_encoding () const { return topDict.EncodingOffset <= ExpertEncoding; } + + hb_codepoint_t glyph_to_code (hb_codepoint_t glyph) const + { + if (encoding != &Null (Encoding)) + return encoding->get_code (glyph); + else + { + hb_codepoint_t sid = glyph_to_sid (glyph); + if (sid == 0) return 0; + hb_codepoint_t code = 0; + switch (topDict.EncodingOffset) + { + case StandardEncoding: + code = lookup_standard_encoding_for_code (sid); + break; + case ExpertEncoding: + code = lookup_expert_encoding_for_code (sid); + break; + default: + break; + } + return code; + } + } + + hb_codepoint_t glyph_to_sid (hb_codepoint_t glyph) const + { + if (charset != &Null (Charset)) + return charset->get_sid (glyph, num_glyphs); + else + { + hb_codepoint_t sid = 0; + switch (topDict.CharsetOffset) + { + case ISOAdobeCharset: + if (glyph <= 228 /*zcaron*/) sid = glyph; + break; + case ExpertCharset: + sid = lookup_expert_charset_for_sid (glyph); + break; + case ExpertSubsetCharset: + sid = lookup_expert_subset_charset_for_sid (glyph); + break; + default: + break; + } + return sid; + } + } + + hb_codepoint_t sid_to_glyph (hb_codepoint_t sid) const + { + if (charset != &Null (Charset)) + return charset->get_glyph (sid, num_glyphs); + else + { + hb_codepoint_t glyph = 0; + switch (topDict.CharsetOffset) + { + case ISOAdobeCharset: + if (sid <= 228 /*zcaron*/) glyph = sid; + break; + case ExpertCharset: + glyph = lookup_expert_charset_for_glyph (sid); + break; + case ExpertSubsetCharset: + glyph = lookup_expert_subset_charset_for_glyph (sid); + break; + default: + break; + } + return glyph; + } + } + + protected: + hb_blob_t *blob; + hb_sanitize_context_t sc; + + public: + const Encoding *encoding; + const Charset *charset; + const CFF1NameIndex *nameIndex; + const CFF1TopDictIndex *topDictIndex; + const CFF1StringIndex *stringIndex; + const CFF1Subrs *globalSubrs; + const CFF1CharStrings *charStrings; + const CFF1FDArray *fdArray; + const CFF1FDSelect *fdSelect; + unsigned int fdCount; + + cff1_top_dict_values_t topDict; + hb_vector_t<cff1_font_dict_values_t> + fontDicts; + hb_vector_t<PRIVDICTVAL> privateDicts; + + unsigned int num_glyphs; + }; + + struct accelerator_t : accelerator_templ_t<cff1_private_dict_opset_t, cff1_private_dict_values_t> + { + void init (hb_face_t *face) + { + SUPER::init (face); + + if (!is_valid ()) return; + if (is_CID ()) return; + + /* fill glyph_names */ + for (hb_codepoint_t gid = 0; gid < num_glyphs; gid++) + { + hb_codepoint_t sid = glyph_to_sid (gid); + gname_t gname; + gname.sid = sid; + if (sid < cff1_std_strings_length) + gname.name = cff1_std_strings (sid); + else + { + byte_str_t ustr = (*stringIndex)[sid - cff1_std_strings_length]; + gname.name = hb_bytes_t ((const char*)ustr.arrayZ, ustr.length); + } + if (unlikely (!gname.name.arrayZ)) { fini (); return; } + glyph_names.push (gname); + } + glyph_names.qsort (); + } + + void fini () + { + glyph_names.fini (); + + SUPER::fini (); + } + + bool get_glyph_name (hb_codepoint_t glyph, + char *buf, unsigned int buf_len) const + { + if (!buf) return true; + if (unlikely (!is_valid ())) return false; + if (is_CID()) return false; + hb_codepoint_t sid = glyph_to_sid (glyph); + const char *str; + size_t str_len; + if (sid < cff1_std_strings_length) + { + hb_bytes_t byte_str = cff1_std_strings (sid); + str = byte_str.arrayZ; + str_len = byte_str.length; + } + else + { + byte_str_t ubyte_str = (*stringIndex)[sid - cff1_std_strings_length]; + str = (const char *)ubyte_str.arrayZ; + str_len = ubyte_str.length; + } + if (!str_len) return false; + unsigned int len = hb_min (buf_len - 1, str_len); + strncpy (buf, (const char*)str, len); + buf[len] = '\0'; + return true; + } + + bool get_glyph_from_name (const char *name, int len, + hb_codepoint_t *glyph) const + { + if (len < 0) len = strlen (name); + if (unlikely (!len)) return false; + + gname_t key = { hb_bytes_t (name, len), 0 }; + const gname_t *gname = glyph_names.bsearch (key); + if (!gname) return false; + hb_codepoint_t gid = sid_to_glyph (gname->sid); + if (!gid && gname->sid) return false; + *glyph = gid; + return true; + } + + HB_INTERNAL bool get_extents (hb_font_t *font, hb_codepoint_t glyph, hb_glyph_extents_t *extents) const; + HB_INTERNAL bool get_seac_components (hb_codepoint_t glyph, hb_codepoint_t *base, hb_codepoint_t *accent) const; +#ifdef HB_EXPERIMENTAL_API + HB_INTERNAL bool get_path (hb_font_t *font, hb_codepoint_t glyph, draw_helper_t &draw_helper) const; +#endif + + private: + struct gname_t + { + hb_bytes_t name; + uint16_t sid; + + static int cmp (const void *a_, const void *b_) + { + const gname_t *a = (const gname_t *)a_; + const gname_t *b = (const gname_t *)b_; + int minlen = hb_min (a->name.length, b->name.length); + int ret = strncmp (a->name.arrayZ, b->name.arrayZ, minlen); + if (ret) return ret; + return a->name.length - b->name.length; + } + + int cmp (const gname_t &a) const { return cmp (&a, this); } + }; + + hb_sorted_vector_t<gname_t> glyph_names; + + typedef accelerator_templ_t<cff1_private_dict_opset_t, cff1_private_dict_values_t> SUPER; + }; + + struct accelerator_subset_t : accelerator_templ_t<cff1_private_dict_opset_subset, cff1_private_dict_values_subset_t> {}; + + bool subset (hb_subset_context_t *c) const { return hb_subset_cff1 (c); } + + protected: + HB_INTERNAL static hb_codepoint_t lookup_standard_encoding_for_code (hb_codepoint_t sid); + HB_INTERNAL static hb_codepoint_t lookup_expert_encoding_for_code (hb_codepoint_t sid); + HB_INTERNAL static hb_codepoint_t lookup_expert_charset_for_sid (hb_codepoint_t glyph); + HB_INTERNAL static hb_codepoint_t lookup_expert_subset_charset_for_sid (hb_codepoint_t glyph); + HB_INTERNAL static hb_codepoint_t lookup_expert_charset_for_glyph (hb_codepoint_t sid); + HB_INTERNAL static hb_codepoint_t lookup_expert_subset_charset_for_glyph (hb_codepoint_t sid); + HB_INTERNAL static hb_codepoint_t lookup_standard_encoding_for_sid (hb_codepoint_t code); + + public: + FixedVersion<HBUINT8> version; /* Version of CFF table. set to 0x0100u */ + OffsetTo<CFF1NameIndex, HBUINT8> nameIndex; /* headerSize = Offset to Name INDEX. */ + HBUINT8 offSize; /* offset size (unused?) */ + + public: + DEFINE_SIZE_STATIC (4); +}; + +struct cff1_accelerator_t : cff1::accelerator_t {}; +} /* namespace OT */ + +#endif /* HB_OT_CFF1_TABLE_HH */ |