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@ -33,213 +33,6 @@ |
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namespace OT { |
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template <typename MapCountT> |
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struct DeltaSetIndexMapFormat01 |
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{ |
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friend struct DeltaSetIndexMap; |
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unsigned get_size () const |
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{ return min_size + mapCount * get_width (); } |
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private: |
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DeltaSetIndexMapFormat01* copy (hb_serialize_context_t *c) const |
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{ |
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TRACE_SERIALIZE (this); |
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return_trace (c->embed (this)); |
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} |
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template <typename T> |
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bool serialize (hb_serialize_context_t *c, const T &plan) |
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{ |
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unsigned int width = plan.get_width (); |
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unsigned int inner_bit_count = plan.get_inner_bit_count (); |
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const hb_array_t<const uint32_t> output_map = plan.get_output_map (); |
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TRACE_SERIALIZE (this); |
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if (unlikely (output_map.length && ((((inner_bit_count-1)&~0xF)!=0) || (((width-1)&~0x3)!=0)))) |
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return_trace (false); |
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if (unlikely (!c->extend_min (this))) return_trace (false); |
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entryFormat = ((width-1)<<4)|(inner_bit_count-1); |
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mapCount = output_map.length; |
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HBUINT8 *p = c->allocate_size<HBUINT8> (width * output_map.length); |
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if (unlikely (!p)) return_trace (false); |
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for (unsigned int i = 0; i < output_map.length; i++) |
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{ |
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unsigned int v = output_map.arrayZ[i]; |
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if (v) |
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{ |
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unsigned int outer = v >> 16; |
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unsigned int inner = v & 0xFFFF; |
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unsigned int u = (outer << inner_bit_count) | inner; |
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for (unsigned int w = width; w > 0;) |
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{ |
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p[--w] = u; |
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u >>= 8; |
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} |
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} |
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p += width; |
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} |
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return_trace (true); |
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} |
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uint32_t map (unsigned int v) const /* Returns 16.16 outer.inner. */ |
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{ |
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/* If count is zero, pass value unchanged. This takes
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* care of direct mapping for advance map. */ |
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if (!mapCount) |
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return v; |
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if (v >= mapCount) |
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v = mapCount - 1; |
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unsigned int u = 0; |
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{ /* Fetch it. */ |
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unsigned int w = get_width (); |
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const HBUINT8 *p = mapDataZ.arrayZ + w * v; |
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for (; w; w--) |
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u = (u << 8) + *p++; |
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} |
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{ /* Repack it. */ |
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unsigned int n = get_inner_bit_count (); |
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unsigned int outer = u >> n; |
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unsigned int inner = u & ((1 << n) - 1); |
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u = (outer<<16) | inner; |
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} |
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return u; |
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} |
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unsigned get_map_count () const { return mapCount; } |
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unsigned get_width () const { return ((entryFormat >> 4) & 3) + 1; } |
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unsigned get_inner_bit_count () const { return (entryFormat & 0xF) + 1; } |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this) && |
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hb_barrier () && |
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c->check_range (mapDataZ.arrayZ, |
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mapCount, |
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get_width ())); |
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} |
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protected: |
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HBUINT8 format; /* Format identifier--format = 0 */ |
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HBUINT8 entryFormat; /* A packed field that describes the compressed
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* representation of delta-set indices. */ |
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MapCountT mapCount; /* The number of mapping entries. */ |
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UnsizedArrayOf<HBUINT8> |
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mapDataZ; /* The delta-set index mapping data. */ |
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public: |
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DEFINE_SIZE_ARRAY (2+MapCountT::static_size, mapDataZ); |
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}; |
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struct DeltaSetIndexMap |
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{ |
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template <typename T> |
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bool serialize (hb_serialize_context_t *c, const T &plan) |
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{ |
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TRACE_SERIALIZE (this); |
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unsigned length = plan.get_output_map ().length; |
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u.format = length <= 0xFFFF ? 0 : 1; |
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switch (u.format) { |
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case 0: return_trace (u.format0.serialize (c, plan)); |
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case 1: return_trace (u.format1.serialize (c, plan)); |
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default:return_trace (false); |
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} |
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} |
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uint32_t map (unsigned v) const |
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{ |
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switch (u.format) { |
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case 0: return (u.format0.map (v)); |
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case 1: return (u.format1.map (v)); |
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default:return v; |
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} |
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} |
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unsigned get_map_count () const |
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{ |
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switch (u.format) { |
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case 0: return u.format0.get_map_count (); |
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case 1: return u.format1.get_map_count (); |
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default:return 0; |
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} |
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} |
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unsigned get_width () const |
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{ |
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switch (u.format) { |
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case 0: return u.format0.get_width (); |
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case 1: return u.format1.get_width (); |
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default:return 0; |
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} |
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} |
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unsigned get_inner_bit_count () const |
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{ |
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switch (u.format) { |
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case 0: return u.format0.get_inner_bit_count (); |
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case 1: return u.format1.get_inner_bit_count (); |
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default:return 0; |
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} |
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} |
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bool sanitize (hb_sanitize_context_t *c) const |
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{ |
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TRACE_SANITIZE (this); |
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if (!u.format.sanitize (c)) return_trace (false); |
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hb_barrier (); |
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switch (u.format) { |
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case 0: return_trace (u.format0.sanitize (c)); |
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case 1: return_trace (u.format1.sanitize (c)); |
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default:return_trace (true); |
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} |
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} |
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DeltaSetIndexMap* copy (hb_serialize_context_t *c) const |
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{ |
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TRACE_SERIALIZE (this); |
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switch (u.format) { |
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case 0: return_trace (reinterpret_cast<DeltaSetIndexMap *> (u.format0.copy (c))); |
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case 1: return_trace (reinterpret_cast<DeltaSetIndexMap *> (u.format1.copy (c))); |
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default:return_trace (nullptr); |
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} |
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} |
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protected: |
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union { |
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HBUINT8 format; /* Format identifier */ |
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DeltaSetIndexMapFormat01<HBUINT16> format0; |
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DeltaSetIndexMapFormat01<HBUINT32> format1; |
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} u; |
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public: |
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DEFINE_SIZE_UNION (1, format); |
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}; |
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struct ItemVarStoreInstancer |
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{ |
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ItemVarStoreInstancer (const ItemVariationStore *varStore, |
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const DeltaSetIndexMap *varIdxMap, |
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hb_array_t<const int> coords) : |
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varStore (varStore), varIdxMap (varIdxMap), coords (coords) {} |
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operator bool () const { return varStore && bool (coords); } |
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/* according to the spec, if colr table has varStore but does not have
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* varIdxMap, then an implicit identity mapping is used */ |
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float operator() (uint32_t varIdx, unsigned short offset = 0) const |
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{ return coords ? varStore->get_delta (varIdxMap ? varIdxMap->map (VarIdx::add (varIdx, offset)) : varIdx + offset, coords) : 0; } |
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const ItemVariationStore *varStore; |
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const DeltaSetIndexMap *varIdxMap; |
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hb_array_t<const int> coords; |
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}; |
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/* https://docs.microsoft.com/en-us/typography/opentype/spec/otvarcommonformats#tuplevariationheader */ |
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struct TupleVariationHeader |
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@ -2180,6 +1973,7 @@ struct item_variations_t |
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} |
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}; |
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} /* namespace OT */ |
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Behdad Esfahbod
10 months ago