diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-math-table.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-math-table.hh | 463 |
1 files changed, 437 insertions, 26 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-math-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-math-table.hh index 26aa080603..32e497aef6 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-math-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-math-table.hh @@ -41,6 +41,16 @@ struct MathValueRecord hb_position_t get_y_value (hb_font_t *font, const void *base) const { return font->em_scale_y (value) + (base+deviceTable).get_y_delta (font); } + MathValueRecord* copy (hb_serialize_context_t *c, const void *base) const + { + TRACE_SERIALIZE (this); + auto *out = c->embed (this); + if (unlikely (!out)) return_trace (nullptr); + out->deviceTable.serialize_copy (c, deviceTable, base, 0, hb_serialize_context_t::Head); + + return_trace (out); + } + bool sanitize (hb_sanitize_context_t *c, const void *base) const { TRACE_SANITIZE (this); @@ -49,7 +59,7 @@ struct MathValueRecord protected: HBINT16 value; /* The X or Y value in design units */ - OffsetTo<Device> deviceTable; /* Offset to the device table - from the + Offset16To<Device> deviceTable; /* Offset to the device table - from the * beginning of parent table. May be NULL. * Suggested format for device table is 1. */ @@ -59,6 +69,28 @@ struct MathValueRecord struct MathConstants { + MathConstants* copy (hb_serialize_context_t *c) const + { + TRACE_SERIALIZE (this); + auto *out = c->start_embed (this); + + HBINT16 *p = c->allocate_size<HBINT16> (HBINT16::static_size * 2); + if (unlikely (!p)) return_trace (nullptr); + hb_memcpy (p, percentScaleDown, HBINT16::static_size * 2); + + HBUINT16 *m = c->allocate_size<HBUINT16> (HBUINT16::static_size * 2); + if (unlikely (!m)) return_trace (nullptr); + hb_memcpy (m, minHeight, HBUINT16::static_size * 2); + + unsigned count = ARRAY_LENGTH (mathValueRecords); + for (unsigned i = 0; i < count; i++) + if (!c->copy (mathValueRecords[i], this)) + return_trace (nullptr); + + if (!c->embed (radicalDegreeBottomRaisePercent)) return_trace (nullptr); + return_trace (out); + } + bool sanitize_math_value_records (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -165,6 +197,28 @@ struct MathConstants struct MathItalicsCorrectionInfo { + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = c->plan->_glyphset_mathed; + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + hb_zip (this+coverage, italicsCorrection) + | hb_filter (glyphset, hb_first) + | hb_filter (serialize_math_record_array (c->serializer, out->italicsCorrection, this), hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + out->coverage.serialize_serialize (c->serializer, new_coverage.iter ()); + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -181,11 +235,11 @@ struct MathItalicsCorrectionInfo } protected: - OffsetTo<Coverage> coverage; /* Offset to Coverage table - + Offset16To<Coverage> coverage; /* Offset to Coverage table - * from the beginning of * MathItalicsCorrectionInfo * table. */ - ArrayOf<MathValueRecord> italicsCorrection; /* Array of MathValueRecords + Array16Of<MathValueRecord> italicsCorrection; /* Array of MathValueRecords * defining italics correction * values for each * covered glyph. */ @@ -196,6 +250,28 @@ struct MathItalicsCorrectionInfo struct MathTopAccentAttachment { + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = c->plan->_glyphset_mathed; + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + hb_zip (this+topAccentCoverage, topAccentAttachment) + | hb_filter (glyphset, hb_first) + | hb_filter (serialize_math_record_array (c->serializer, out->topAccentAttachment, this), hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + out->topAccentCoverage.serialize_serialize (c->serializer, new_coverage.iter ()); + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -214,11 +290,11 @@ struct MathTopAccentAttachment } protected: - OffsetTo<Coverage> topAccentCoverage; /* Offset to Coverage table - + Offset16To<Coverage> topAccentCoverage; /* Offset to Coverage table - * from the beginning of * MathTopAccentAttachment * table. */ - ArrayOf<MathValueRecord> topAccentAttachment; /* Array of MathValueRecords + Array16Of<MathValueRecord> topAccentAttachment; /* Array of MathValueRecords * defining top accent * attachment points for each * covered glyph. */ @@ -229,6 +305,21 @@ struct MathTopAccentAttachment struct MathKern { + MathKern* copy (hb_serialize_context_t *c) const + { + TRACE_SERIALIZE (this); + auto *out = c->start_embed (this); + + if (unlikely (!c->embed (heightCount))) return_trace (nullptr); + + unsigned count = 2 * heightCount + 1; + for (unsigned i = 0; i < count; i++) + if (!c->copy (mathValueRecordsZ.arrayZ[i], this)) + return_trace (nullptr); + + return_trace (out); + } + bool sanitize_math_value_records (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -242,6 +333,7 @@ struct MathKern { TRACE_SANITIZE (this); return_trace (c->check_struct (this) && + hb_barrier () && c->check_array (mathValueRecordsZ.arrayZ, 2 * heightCount + 1) && sanitize_math_value_records (c)); } @@ -276,6 +368,37 @@ struct MathKern return kernValue[i].get_x_value (font, this); } + unsigned int get_entries (unsigned int start_offset, + unsigned int *entries_count, /* IN/OUT */ + hb_ot_math_kern_entry_t *kern_entries, /* OUT */ + hb_font_t *font) const + { + const MathValueRecord* correctionHeight = mathValueRecordsZ.arrayZ; + const MathValueRecord* kernValue = mathValueRecordsZ.arrayZ + heightCount; + const unsigned int entriesCount = heightCount + 1; + + if (entries_count) + { + unsigned int start = hb_min (start_offset, entriesCount); + unsigned int end = hb_min (start + *entries_count, entriesCount); + *entries_count = end - start; + + for (unsigned int i = 0; i < *entries_count; i++) { + unsigned int j = start + i; + + hb_position_t max_height; + if (j == heightCount) { + max_height = INT32_MAX; + } else { + max_height = correctionHeight[j].get_y_value (font, this); + } + + kern_entries[i] = {max_height, kernValue[j].get_x_value (font, this)}; + } + } + return entriesCount; + } + protected: HBUINT16 heightCount; UnsizedArrayOf<MathValueRecord> @@ -295,6 +418,19 @@ struct MathKern struct MathKernInfoRecord { + MathKernInfoRecord* copy (hb_serialize_context_t *c, const void *base) const + { + TRACE_SERIALIZE (this); + auto *out = c->embed (this); + if (unlikely (!out)) return_trace (nullptr); + + unsigned count = ARRAY_LENGTH (mathKern); + for (unsigned i = 0; i < count; i++) + out->mathKern[i].serialize_copy (c, mathKern[i], base, 0, hb_serialize_context_t::Head); + + return_trace (out); + } + bool sanitize (hb_sanitize_context_t *c, const void *base) const { TRACE_SANITIZE (this); @@ -317,10 +453,28 @@ struct MathKernInfoRecord return (base+mathKern[idx]).get_value (correction_height, font); } + unsigned int get_kernings (hb_ot_math_kern_t kern, + unsigned int start_offset, + unsigned int *entries_count, /* IN/OUT */ + hb_ot_math_kern_entry_t *kern_entries, /* OUT */ + hb_font_t *font, + const void *base) const + { + unsigned int idx = kern; + if (unlikely (idx >= ARRAY_LENGTH (mathKern)) || !mathKern[idx]) { + if (entries_count) *entries_count = 0; + return 0; + } + return (base+mathKern[idx]).get_entries (start_offset, + entries_count, + kern_entries, + font); + } + protected: /* Offset to MathKern table for each corner - * from the beginning of MathKernInfo table. May be NULL. */ - OffsetTo<MathKern> mathKern[4]; + Offset16To<MathKern> mathKern[4]; public: DEFINE_SIZE_STATIC (8); @@ -328,6 +482,28 @@ struct MathKernInfoRecord struct MathKernInfo { + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = c->plan->_glyphset_mathed; + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + hb_sorted_vector_t<hb_codepoint_t> new_coverage; + + hb_zip (this+mathKernCoverage, mathKernInfoRecords) + | hb_filter (glyphset, hb_first) + | hb_filter (serialize_math_record_array (c->serializer, out->mathKernInfoRecords, this), hb_second) + | hb_map (hb_first) + | hb_map (glyph_map) + | hb_sink (new_coverage) + ; + + out->mathKernCoverage.serialize_serialize (c->serializer, new_coverage.iter ()); + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -345,13 +521,29 @@ struct MathKernInfo return mathKernInfoRecords[index].get_kerning (kern, correction_height, font, this); } + unsigned int get_kernings (hb_codepoint_t glyph, + hb_ot_math_kern_t kern, + unsigned int start_offset, + unsigned int *entries_count, /* IN/OUT */ + hb_ot_math_kern_entry_t *kern_entries, /* OUT */ + hb_font_t *font) const + { + unsigned int index = (this+mathKernCoverage).get_coverage (glyph); + return mathKernInfoRecords[index].get_kernings (kern, + start_offset, + entries_count, + kern_entries, + font, + this); + } + protected: - OffsetTo<Coverage> + Offset16To<Coverage> mathKernCoverage; /* Offset to Coverage table - * from the beginning of the * MathKernInfo table. */ - ArrayOf<MathKernInfoRecord> + Array16Of<MathKernInfoRecord> mathKernInfoRecords; /* Array of MathKernInfoRecords, * per-glyph information for @@ -365,6 +557,32 @@ struct MathKernInfo struct MathGlyphInfo { + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->embed (*this); + if (unlikely (!out)) return_trace (false); + + out->mathItalicsCorrectionInfo.serialize_subset (c, mathItalicsCorrectionInfo, this); + out->mathTopAccentAttachment.serialize_subset (c, mathTopAccentAttachment, this); + + const hb_set_t &glyphset = c->plan->_glyphset_mathed; + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto it = + + hb_iter (this+extendedShapeCoverage) + | hb_take (c->plan->source->get_num_glyphs ()) + | hb_filter (glyphset) + | hb_map_retains_sorting (glyph_map) + ; + + if (it) out->extendedShapeCoverage.serialize_serialize (c->serializer, it); + else out->extendedShapeCoverage = 0; + + out->mathKernInfo.serialize_subset (c, mathKernInfo, this); + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -392,25 +610,38 @@ struct MathGlyphInfo hb_font_t *font) const { return (this+mathKernInfo).get_kerning (glyph, kern, correction_height, font); } + hb_position_t get_kernings (hb_codepoint_t glyph, + hb_ot_math_kern_t kern, + unsigned int start_offset, + unsigned int *entries_count, /* IN/OUT */ + hb_ot_math_kern_entry_t *kern_entries, /* OUT */ + hb_font_t *font) const + { return (this+mathKernInfo).get_kernings (glyph, + kern, + start_offset, + entries_count, + kern_entries, + font); } + protected: /* Offset to MathItalicsCorrectionInfo table - * from the beginning of MathGlyphInfo table. */ - OffsetTo<MathItalicsCorrectionInfo> mathItalicsCorrectionInfo; + Offset16To<MathItalicsCorrectionInfo> mathItalicsCorrectionInfo; /* Offset to MathTopAccentAttachment table - * from the beginning of MathGlyphInfo table. */ - OffsetTo<MathTopAccentAttachment> mathTopAccentAttachment; + Offset16To<MathTopAccentAttachment> mathTopAccentAttachment; /* Offset to coverage table for Extended Shape glyphs - * from the beginning of MathGlyphInfo table. When the left or right glyph of * a box is an extended shape variant, the (ink) box (and not the default * position defined by values in MathConstants table) should be used for * vertical positioning purposes. May be NULL.. */ - OffsetTo<Coverage> extendedShapeCoverage; + Offset16To<Coverage> extendedShapeCoverage; /* Offset to MathKernInfo table - * from the beginning of MathGlyphInfo table. */ - OffsetTo<MathKernInfo> mathKernInfo; + Offset16To<MathKernInfo> mathKernInfo; public: DEFINE_SIZE_STATIC (8); @@ -420,14 +651,27 @@ struct MathGlyphVariantRecord { friend struct MathGlyphConstruction; + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->embed (this); + if (unlikely (!out)) return_trace (false); + + const hb_map_t& glyph_map = *c->plan->glyph_map; + return_trace (c->serializer->check_assign (out->variantGlyph, glyph_map.get (variantGlyph), HB_SERIALIZE_ERROR_INT_OVERFLOW)); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); return_trace (c->check_struct (this)); } + void closure_glyphs (hb_set_t *variant_glyphs) const + { variant_glyphs->add (variantGlyph); } + protected: - HBGlyphID variantGlyph; /* Glyph ID for the variant. */ + HBGlyphID16 variantGlyph; /* Glyph ID for the variant. */ HBUINT16 advanceMeasurement; /* Advance width/height, in design units, of the * variant, in the direction of requested * glyph extension. */ @@ -450,6 +694,16 @@ struct PartFlags : HBUINT16 struct MathGlyphPartRecord { + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->embed (this); + if (unlikely (!out)) return_trace (false); + + const hb_map_t& glyph_map = *c->plan->glyph_map; + return_trace (c->serializer->check_assign (out->glyph, glyph_map.get (glyph), HB_SERIALIZE_ERROR_INT_OVERFLOW)); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -474,8 +728,11 @@ struct MathGlyphPartRecord (partFlags & PartFlags::Defined); } + void closure_glyphs (hb_set_t *variant_glyphs) const + { variant_glyphs->add (glyph); } + protected: - HBGlyphID glyph; /* Glyph ID for the part. */ + HBGlyphID16 glyph; /* Glyph ID for the part. */ HBUINT16 startConnectorLength; /* Advance width/ height of the straight bar * connector material, in design units, is at @@ -497,6 +754,18 @@ struct MathGlyphPartRecord struct MathGlyphAssembly { + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + + if (!c->serializer->copy (italicsCorrection, this)) return_trace (false); + if (!c->serializer->copy<HBUINT16> (partRecords.len)) return_trace (false); + + for (const auto& record : partRecords.iter ()) + if (!record.subset (c)) return_trace (false); + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -515,7 +784,7 @@ struct MathGlyphAssembly if (parts_count) { int64_t mult = font->dir_mult (direction); - for (auto _ : hb_zip (partRecords.sub_array (start_offset, parts_count), + for (auto _ : hb_zip (partRecords.as_array ().sub_array (start_offset, parts_count), hb_array (parts, *parts_count))) _.first.extract (_.second, mult, font); } @@ -526,13 +795,19 @@ struct MathGlyphAssembly return partRecords.len; } + void closure_glyphs (hb_set_t *variant_glyphs) const + { + for (const auto& _ : partRecords.iter ()) + _.closure_glyphs (variant_glyphs); + } + protected: MathValueRecord italicsCorrection; /* Italics correction of this * MathGlyphAssembly. Should not * depend on the assembly size. */ - ArrayOf<MathGlyphPartRecord> + Array16Of<MathGlyphPartRecord> partRecords; /* Array of part records, from * left to right and bottom to * top. */ @@ -543,6 +818,22 @@ struct MathGlyphAssembly struct MathGlyphConstruction { + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + + out->glyphAssembly.serialize_subset (c, glyphAssembly, this); + + if (!c->serializer->check_assign (out->mathGlyphVariantRecord.len, mathGlyphVariantRecord.len, HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + for (const auto& record : mathGlyphVariantRecord.iter ()) + if (!record.subset (c)) return_trace (false); + + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -562,20 +853,28 @@ struct MathGlyphConstruction if (variants_count) { int64_t mult = font->dir_mult (direction); - for (auto _ : hb_zip (mathGlyphVariantRecord.sub_array (start_offset, variants_count), + for (auto _ : hb_zip (mathGlyphVariantRecord.as_array ().sub_array (start_offset, variants_count), hb_array (variants, *variants_count))) _.second = {_.first.variantGlyph, font->em_mult (_.first.advanceMeasurement, mult)}; } return mathGlyphVariantRecord.len; } + void closure_glyphs (hb_set_t *variant_glyphs) const + { + (this+glyphAssembly).closure_glyphs (variant_glyphs); + + for (const auto& _ : mathGlyphVariantRecord.iter ()) + _.closure_glyphs (variant_glyphs); + } + protected: /* Offset to MathGlyphAssembly table for this shape - from the beginning of MathGlyphConstruction table. May be NULL. */ - OffsetTo<MathGlyphAssembly> glyphAssembly; + Offset16To<MathGlyphAssembly> glyphAssembly; /* MathGlyphVariantRecords for alternative variants of the glyphs. */ - ArrayOf<MathGlyphVariantRecord> mathGlyphVariantRecord; + Array16Of<MathGlyphVariantRecord> mathGlyphVariantRecord; public: DEFINE_SIZE_ARRAY (4, mathGlyphVariantRecord); @@ -583,6 +882,94 @@ struct MathGlyphConstruction struct MathVariants { + void closure_glyphs (const hb_set_t *glyph_set, + hb_set_t *variant_glyphs) const + { + const hb_array_t<const Offset16To<MathGlyphConstruction>> glyph_construction_offsets = glyphConstruction.as_array (vertGlyphCount + horizGlyphCount); + + if (vertGlyphCoverage) + { + const auto vert_offsets = glyph_construction_offsets.sub_array (0, vertGlyphCount); + + hb_zip (this+vertGlyphCoverage, vert_offsets) + | hb_filter (glyph_set, hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([=] (const MathGlyphConstruction &_) { _.closure_glyphs (variant_glyphs); }) + ; + } + + if (horizGlyphCoverage) + { + const auto hori_offsets = glyph_construction_offsets.sub_array (vertGlyphCount, horizGlyphCount); + + hb_zip (this+horizGlyphCoverage, hori_offsets) + | hb_filter (glyph_set, hb_first) + | hb_map (hb_second) + | hb_map (hb_add (this)) + | hb_apply ([=] (const MathGlyphConstruction &_) { _.closure_glyphs (variant_glyphs); }) + ; + } + } + + void collect_coverage_and_indices (hb_sorted_vector_t<hb_codepoint_t>& new_coverage, + const Offset16To<Coverage>& coverage, + unsigned i, + unsigned end_index, + hb_set_t& indices, + const hb_set_t& glyphset, + const hb_map_t& glyph_map) const + { + if (!coverage) return; + + for (const auto _ : (this+coverage).iter ()) + { + if (i >= end_index) return; + if (glyphset.has (_)) + { + unsigned new_gid = glyph_map.get (_); + new_coverage.push (new_gid); + indices.add (i); + } + i++; + } + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + const hb_set_t &glyphset = c->plan->_glyphset_mathed; + const hb_map_t &glyph_map = *c->plan->glyph_map; + + auto *out = c->serializer->start_embed (*this); + if (unlikely (!c->serializer->extend_min (out))) return_trace (false); + if (!c->serializer->check_assign (out->minConnectorOverlap, minConnectorOverlap, HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + + hb_sorted_vector_t<hb_codepoint_t> new_vert_coverage; + hb_sorted_vector_t<hb_codepoint_t> new_hori_coverage; + hb_set_t indices; + collect_coverage_and_indices (new_vert_coverage, vertGlyphCoverage, 0, vertGlyphCount, indices, glyphset, glyph_map); + collect_coverage_and_indices (new_hori_coverage, horizGlyphCoverage, vertGlyphCount, vertGlyphCount + horizGlyphCount, indices, glyphset, glyph_map); + + if (!c->serializer->check_assign (out->vertGlyphCount, new_vert_coverage.length, HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + if (!c->serializer->check_assign (out->horizGlyphCount, new_hori_coverage.length, HB_SERIALIZE_ERROR_INT_OVERFLOW)) + return_trace (false); + + for (unsigned i : indices.iter ()) + { + auto *o = c->serializer->embed (glyphConstruction[i]); + if (!o) return_trace (false); + o->serialize_subset (c, glyphConstruction[i], this); + } + + if (new_vert_coverage) + out->vertGlyphCoverage.serialize_serialize (c->serializer, new_vert_coverage.iter ()); + + if (new_hori_coverage) + out->horizGlyphCoverage.serialize_serialize (c->serializer, new_hori_coverage.iter ()); + return_trace (true); + } + bool sanitize_offsets (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -598,6 +985,7 @@ struct MathVariants return_trace (c->check_struct (this) && vertGlyphCoverage.sanitize (c, this) && horizGlyphCoverage.sanitize (c, this) && + hb_barrier () && c->check_array (glyphConstruction.arrayZ, vertGlyphCount + horizGlyphCount) && sanitize_offsets (c)); } @@ -636,7 +1024,7 @@ struct MathVariants { bool vertical = HB_DIRECTION_IS_VERTICAL (direction); unsigned int count = vertical ? vertGlyphCount : horizGlyphCount; - const OffsetTo<Coverage> &coverage = vertical ? vertGlyphCoverage + const Offset16To<Coverage> &coverage = vertical ? vertGlyphCoverage : horizGlyphCoverage; unsigned int index = (this+coverage).get_coverage (glyph); @@ -653,11 +1041,11 @@ struct MathVariants /* Minimum overlap of connecting * glyphs during glyph construction, * in design units. */ - OffsetTo<Coverage> vertGlyphCoverage; + Offset16To<Coverage> vertGlyphCoverage; /* Offset to Coverage table - * from the beginning of MathVariants * table. */ - OffsetTo<Coverage> horizGlyphCoverage; + Offset16To<Coverage> horizGlyphCoverage; /* Offset to Coverage table - * from the beginning of MathVariants * table. */ @@ -671,7 +1059,7 @@ struct MathVariants /* Array of offsets to MathGlyphConstruction tables - from the beginning of the MathVariants table, for shapes growing in vertical/horizontal direction. */ - UnsizedArrayOf<OffsetTo<MathGlyphConstruction>> + UnsizedArrayOf<Offset16To<MathGlyphConstruction>> glyphConstruction; public: @@ -690,11 +1078,34 @@ struct MATH bool has_data () const { return version.to_int (); } + void closure_glyphs (hb_set_t *glyph_set) const + { + if (mathVariants) + { + hb_set_t variant_glyphs; + (this+mathVariants).closure_glyphs (glyph_set, &variant_glyphs); + hb_set_union (glyph_set, &variant_glyphs); + } + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + auto *out = c->serializer->embed (*this); + if (unlikely (!out)) return_trace (false); + + out->mathConstants.serialize_copy (c->serializer, mathConstants, this, 0, hb_serialize_context_t::Head); + out->mathGlyphInfo.serialize_subset (c, mathGlyphInfo, this); + out->mathVariants.serialize_subset (c, mathVariants, this); + return_trace (true); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); return_trace (version.sanitize (c) && likely (version.major == 1) && + hb_barrier () && mathConstants.sanitize (c, this) && mathGlyphInfo.sanitize (c, this) && mathVariants.sanitize (c, this)); @@ -711,11 +1122,11 @@ struct MATH protected: FixedVersion<>version; /* Version of the MATH table * initially set to 0x00010000u */ - OffsetTo<MathConstants> + Offset16To<MathConstants> mathConstants; /* MathConstants table */ - OffsetTo<MathGlyphInfo> + Offset16To<MathGlyphInfo> mathGlyphInfo; /* MathGlyphInfo table */ - OffsetTo<MathVariants> + Offset16To<MathVariants> mathVariants; /* MathVariants table */ public: |