diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-layout-common-private.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-layout-common-private.hh | 551 |
1 files changed, 520 insertions, 31 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-common-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-common-private.hh index ea61f5c1bd..62ca7a348e 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-common-private.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-common-private.hh @@ -34,6 +34,14 @@ #include "hb-set-private.hh" +#ifndef HB_MAX_NESTING_LEVEL +#define HB_MAX_NESTING_LEVEL 6 +#endif +#ifndef HB_MAX_CONTEXT_LENGTH +#define HB_MAX_CONTEXT_LENGTH 64 +#endif + + namespace OT { @@ -44,8 +52,6 @@ namespace OT { #define NOT_COVERED ((unsigned int) -1) -#define MAX_NESTING_LEVEL 6 -#define MAX_CONTEXT_LENGTH 64 @@ -501,7 +507,7 @@ struct Feature { return this+featureParams; } inline bool sanitize (hb_sanitize_context_t *c, - const Record<Feature>::sanitize_closure_t *closure) const + const Record<Feature>::sanitize_closure_t *closure = NULL) const { TRACE_SANITIZE (this); if (unlikely (!(c->check_struct (this) && lookupIndex.sanitize (c)))) @@ -539,6 +545,9 @@ struct Feature c->try_set (&featureParams, new_offset) && !featureParams.sanitize (c, this, closure ? closure->tag : HB_TAG_NONE)) return_trace (false); + + if (c->edit_count > 1) + c->edit_count--; /* This was a "legitimate" edit; don't contribute to error count. */ } return_trace (true); @@ -573,6 +582,11 @@ struct LookupFlag : USHORT DEFINE_SIZE_STATIC (2); }; +} /* namespace OT */ +/* This has to be outside the namespace. */ +HB_MARK_AS_FLAG_T (OT::LookupFlag::Flags); +namespace OT { + struct Lookup { inline unsigned int get_subtable_count (void) const { return subTable.len; } @@ -717,8 +731,8 @@ struct CoverageFormat1 inline void init (const struct CoverageFormat1 &c_) { c = &c_; i = 0; }; inline bool more (void) { return i < c->glyphArray.len; } inline void next (void) { i++; } - inline uint16_t get_glyph (void) { return c->glyphArray[i]; } - inline uint16_t get_coverage (void) { return i; } + inline hb_codepoint_t get_glyph (void) { return c->glyphArray[i]; } + inline unsigned int get_coverage (void) { return i; } private: const struct CoverageFormat1 *c; @@ -756,7 +770,11 @@ struct CoverageFormat2 TRACE_SERIALIZE (this); if (unlikely (!c->extend_min (*this))) return_trace (false); - if (unlikely (!num_glyphs)) return_trace (true); + if (unlikely (!num_glyphs)) + { + rangeRecord.len.set (0); + return_trace (true); + } unsigned int num_ranges = 1; for (unsigned int i = 1; i < num_glyphs; i++) @@ -811,26 +829,33 @@ struct CoverageFormat2 public: /* Older compilers need this to be public. */ - struct Iter { - inline void init (const CoverageFormat2 &c_) { + struct Iter + { + inline void init (const CoverageFormat2 &c_) + { c = &c_; coverage = 0; i = 0; j = c->rangeRecord.len ? c_.rangeRecord[0].start : 0; } inline bool more (void) { return i < c->rangeRecord.len; } - inline void next (void) { - coverage++; - if (j == c->rangeRecord[i].end) { + inline void next (void) + { + if (j >= c->rangeRecord[i].end) + { i++; if (more ()) + { j = c->rangeRecord[i].start; + coverage = c->rangeRecord[i].value; + } return; } + coverage++; j++; } - inline uint16_t get_glyph (void) { return j; } - inline uint16_t get_coverage (void) { return coverage; } + inline hb_codepoint_t get_glyph (void) { return j; } + inline unsigned int get_coverage (void) { return coverage; } private: const struct CoverageFormat2 *c; @@ -939,14 +964,14 @@ struct Coverage default: break; } } - inline uint16_t get_glyph (void) { + inline hb_codepoint_t get_glyph (void) { switch (format) { case 1: return u.format1.get_glyph (); case 2: return u.format2.get_glyph (); default:return 0; } } - inline uint16_t get_coverage (void) { + inline unsigned int get_coverage (void) { switch (format) { case 1: return u.format1.get_coverage (); case 2: return u.format2.get_coverage (); @@ -1144,11 +1169,380 @@ struct ClassDef /* + * Item Variation Store + */ + +struct VarRegionAxis +{ + inline float evaluate (int coord) const + { + int start = startCoord, peak = peakCoord, end = endCoord; + + /* TODO Move these to sanitize(). */ + if (unlikely (start > peak || peak > end)) + return 1.; + if (unlikely (start < 0 && end > 0 && peak != 0)) + return 1.; + + if (peak == 0 || coord == peak) + return 1.; + + if (coord <= start || end <= coord) + return 0.; + + /* Interpolate */ + if (coord < peak) + return float (coord - start) / (peak - start); + else + return float (end - coord) / (end - peak); + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + /* TODO Handle invalid start/peak/end configs, so we don't + * have to do that at runtime. */ + } + + public: + F2DOT14 startCoord; + F2DOT14 peakCoord; + F2DOT14 endCoord; + public: + DEFINE_SIZE_STATIC (6); +}; + +struct VarRegionList +{ + inline float evaluate (unsigned int region_index, + int *coords, unsigned int coord_len) const + { + if (unlikely (region_index >= regionCount)) + return 0.; + + const VarRegionAxis *axes = axesZ + (region_index * axisCount); + + float v = 1.; + unsigned int count = MIN (coord_len, (unsigned int) axisCount); + for (unsigned int i = 0; i < count; i++) + { + float factor = axes[i].evaluate (coords[i]); + if (factor == 0.) + return 0.; + v *= factor; + } + return v; + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + c->check_array (axesZ, axesZ[0].static_size, + (unsigned int) axisCount * (unsigned int) regionCount)); + } + + protected: + USHORT axisCount; + USHORT regionCount; + VarRegionAxis axesZ[VAR]; + public: + DEFINE_SIZE_ARRAY (4, axesZ); +}; + +struct VarData +{ + inline unsigned int get_row_size (void) const + { return shortCount + regionIndices.len; } + + inline unsigned int get_size (void) const + { return itemCount * get_row_size (); } + + inline float get_delta (unsigned int inner, + int *coords, unsigned int coord_count, + const VarRegionList ®ions) const + { + if (unlikely (inner >= itemCount)) + return 0.; + + unsigned int count = regionIndices.len; + unsigned int scount = shortCount; + + const BYTE *bytes = &StructAfter<BYTE> (regionIndices); + const BYTE *row = bytes + inner * (scount + count); + + float delta = 0.; + unsigned int i = 0; + + const SHORT *scursor = reinterpret_cast<const SHORT *> (row); + for (; i < scount; i++) + { + float scalar = regions.evaluate (regionIndices.array[i], coords, coord_count); + delta += scalar * *scursor++; + } + const INT8 *bcursor = reinterpret_cast<const INT8 *> (scursor); + for (; i < count; i++) + { + float scalar = regions.evaluate (regionIndices.array[i], coords, coord_count); + delta += scalar * *bcursor++; + } + + return delta; + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + regionIndices.sanitize(c) && + shortCount <= regionIndices.len && + c->check_array (&StructAfter<BYTE> (regionIndices), + get_row_size (), itemCount)); + } + + protected: + USHORT itemCount; + USHORT shortCount; + ArrayOf<USHORT> regionIndices; + BYTE bytesX[VAR]; + public: + DEFINE_SIZE_ARRAY2 (6, regionIndices, bytesX); +}; + +struct VariationStore +{ + inline float get_delta (unsigned int outer, unsigned int inner, + int *coords, unsigned int coord_count) const + { + if (unlikely (outer >= dataSets.len)) + return 0.; + + return (this+dataSets[outer]).get_delta (inner, + coords, coord_count, + this+regions); + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && + format == 1 && + regions.sanitize (c, this) && + dataSets.sanitize (c, this)); + } + + protected: + USHORT format; + OffsetTo<VarRegionList, ULONG> regions; + OffsetArrayOf<VarData, ULONG> dataSets; + public: + DEFINE_SIZE_ARRAY (8, dataSets); +}; + +/* + * Feature Variations + */ + +struct ConditionFormat1 +{ + friend struct Condition; + + private: + inline bool evaluate (const int *coords, unsigned int coord_len) const + { + int coord = axisIndex < coord_len ? coords[axisIndex] : 0; + return filterRangeMinValue <= coord && coord <= filterRangeMaxValue; + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + protected: + USHORT format; /* Format identifier--format = 1 */ + USHORT axisIndex; + F2DOT14 filterRangeMinValue; + F2DOT14 filterRangeMaxValue; + public: + DEFINE_SIZE_STATIC (8); +}; + +struct Condition +{ + inline bool evaluate (const int *coords, unsigned int coord_len) const + { + switch (u.format) { + case 1: return u.format1.evaluate (coords, coord_len); + default:return false; + } + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (!u.format.sanitize (c)) return_trace (false); + switch (u.format) { + case 1: return_trace (u.format1.sanitize (c)); + default:return_trace (true); + } + } + + protected: + union { + USHORT format; /* Format identifier */ + ConditionFormat1 format1; + } u; + public: + DEFINE_SIZE_UNION (2, format); +}; + +struct ConditionSet +{ + inline bool evaluate (const int *coords, unsigned int coord_len) const + { + unsigned int count = conditions.len; + for (unsigned int i = 0; i < count; i++) + if (!(this+conditions.array[i]).evaluate (coords, coord_len)) + return false; + return true; + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (conditions.sanitize (c, this)); + } + + protected: + OffsetArrayOf<Condition, ULONG> conditions; + public: + DEFINE_SIZE_ARRAY (2, conditions); +}; + +struct FeatureTableSubstitutionRecord +{ + friend struct FeatureTableSubstitution; + + inline bool sanitize (hb_sanitize_context_t *c, const void *base) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && feature.sanitize (c, base)); + } + + protected: + USHORT featureIndex; + OffsetTo<Feature, ULONG> feature; + public: + DEFINE_SIZE_STATIC (6); +}; + +struct FeatureTableSubstitution +{ + inline const Feature *find_substitute (unsigned int feature_index) const + { + unsigned int count = substitutions.len; + for (unsigned int i = 0; i < count; i++) + { + const FeatureTableSubstitutionRecord &record = substitutions.array[i]; + if (record.featureIndex == feature_index) + return &(this+record.feature); + } + return NULL; + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (version.sanitize (c) && + likely (version.major == 1) && + substitutions.sanitize (c, this)); + } + + protected: + FixedVersion<> version; /* Version--0x00010000u */ + ArrayOf<FeatureTableSubstitutionRecord> + substitutions; + public: + DEFINE_SIZE_ARRAY (6, substitutions); +}; + +struct FeatureVariationRecord +{ + friend struct FeatureVariations; + + inline bool sanitize (hb_sanitize_context_t *c, const void *base) const + { + TRACE_SANITIZE (this); + return_trace (conditions.sanitize (c, base) && + substitutions.sanitize (c, base)); + } + + protected: + OffsetTo<ConditionSet, ULONG> + conditions; + OffsetTo<FeatureTableSubstitution, ULONG> + substitutions; + public: + DEFINE_SIZE_STATIC (8); +}; + +struct FeatureVariations +{ + static const unsigned int NOT_FOUND_INDEX = 0xFFFFFFFFu; + + inline bool find_index (const int *coords, unsigned int coord_len, + unsigned int *index) const + { + unsigned int count = varRecords.len; + for (unsigned int i = 0; i < count; i++) + { + const FeatureVariationRecord &record = varRecords.array[i]; + if ((this+record.conditions).evaluate (coords, coord_len)) + { + *index = i; + return true; + } + } + *index = NOT_FOUND_INDEX; + return false; + } + + inline const Feature *find_substitute (unsigned int variations_index, + unsigned int feature_index) const + { + const FeatureVariationRecord &record = varRecords[variations_index]; + return (this+record.substitutions).find_substitute (feature_index); + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (version.sanitize (c) && + likely (version.major == 1) && + varRecords.sanitize (c, this)); + } + + protected: + FixedVersion<> version; /* Version--0x00010000u */ + ArrayOf<FeatureVariationRecord, ULONG> + varRecords; + public: + DEFINE_SIZE_ARRAY (8, varRecords); +}; + + +/* * Device Tables */ -struct Device +struct HintingDevice { + friend struct Device; + + private: inline hb_position_t get_x_delta (hb_font_t *font) const { return get_delta (font->x_ppem, font->x_scale); } @@ -1156,6 +1550,21 @@ struct Device inline hb_position_t get_y_delta (hb_font_t *font) const { return get_delta (font->y_ppem, font->y_scale); } + inline unsigned int get_size (void) const + { + unsigned int f = deltaFormat; + if (unlikely (f < 1 || f > 3 || startSize > endSize)) return 3 * USHORT::static_size; + return USHORT::static_size * (4 + ((endSize - startSize) >> (4 - f))); + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && c->check_range (this, this->get_size ())); + } + + private: + inline int get_delta (unsigned int ppem, int scale) const { if (!ppem) return 0; @@ -1166,8 +1575,6 @@ struct Device return (int) (pixels * (int64_t) scale / ppem); } - - inline int get_delta_pixels (unsigned int ppem_size) const { unsigned int f = deltaFormat; @@ -1191,19 +1598,6 @@ struct Device return delta; } - inline unsigned int get_size (void) const - { - unsigned int f = deltaFormat; - if (unlikely (f < 1 || f > 3 || startSize > endSize)) return 3 * USHORT::static_size; - return USHORT::static_size * (4 + ((endSize - startSize) >> (4 - f))); - } - - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && c->check_range (this, this->get_size ())); - } - protected: USHORT startSize; /* Smallest size to correct--in ppem */ USHORT endSize; /* Largest size to correct--in ppem */ @@ -1217,6 +1611,101 @@ struct Device DEFINE_SIZE_ARRAY (6, deltaValue); }; +struct VariationDevice +{ + friend struct Device; + + private: + + inline hb_position_t get_x_delta (hb_font_t *font, const VariationStore &store) const + { return font->em_scalef_x (get_delta (font, store)); } + + inline hb_position_t get_y_delta (hb_font_t *font, const VariationStore &store) const + { return font->em_scalef_y (get_delta (font, store)); } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this)); + } + + private: + + inline float get_delta (hb_font_t *font, const VariationStore &store) const + { + return store.get_delta (outerIndex, innerIndex, font->coords, font->num_coords); + } + + protected: + USHORT outerIndex; + USHORT innerIndex; + USHORT deltaFormat; /* Format identifier for this table: 0x0x8000 */ + public: + DEFINE_SIZE_STATIC (6); +}; + +struct DeviceHeader +{ + protected: + USHORT reserved1; + USHORT reserved2; + public: + USHORT format; /* Format identifier */ + public: + DEFINE_SIZE_STATIC (6); +}; + +struct Device +{ + inline hb_position_t get_x_delta (hb_font_t *font, const VariationStore &store=Null(VariationStore)) const + { + switch (u.b.format) + { + case 1: case 2: case 3: + return u.hinting.get_x_delta (font); + case 0x8000: + return u.variation.get_x_delta (font, store); + default: + return 0; + } + } + inline hb_position_t get_y_delta (hb_font_t *font, const VariationStore &store=Null(VariationStore)) const + { + switch (u.b.format) + { + case 1: case 2: case 3: + return u.hinting.get_y_delta (font); + case 0x8000: + return u.variation.get_y_delta (font, store); + default: + return 0; + } + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + if (!u.b.format.sanitize (c)) return_trace (false); + switch (u.b.format) { + case 1: case 2: case 3: + return_trace (u.hinting.sanitize (c)); + case 0x8000: + return_trace (u.variation.sanitize (c)); + default: + return_trace (true); + } + } + + protected: + union { + DeviceHeader b; + HintingDevice hinting; + VariationDevice variation; + } u; + public: + DEFINE_SIZE_UNION (6, b); +}; + } /* namespace OT */ |