| #ifndef OT_GLYF_COMPOSITEGLYPH_HH |
| #define OT_GLYF_COMPOSITEGLYPH_HH |
| |
| |
| #include "../../hb-open-type.hh" |
| |
| |
| namespace OT { |
| namespace glyf_impl { |
| |
| |
| struct CompositeGlyphRecord |
| { |
| protected: |
| enum composite_glyph_flag_t |
| { |
| ARG_1_AND_2_ARE_WORDS = 0x0001, |
| ARGS_ARE_XY_VALUES = 0x0002, |
| ROUND_XY_TO_GRID = 0x0004, |
| WE_HAVE_A_SCALE = 0x0008, |
| MORE_COMPONENTS = 0x0020, |
| WE_HAVE_AN_X_AND_Y_SCALE = 0x0040, |
| WE_HAVE_A_TWO_BY_TWO = 0x0080, |
| WE_HAVE_INSTRUCTIONS = 0x0100, |
| USE_MY_METRICS = 0x0200, |
| OVERLAP_COMPOUND = 0x0400, |
| SCALED_COMPONENT_OFFSET = 0x0800, |
| UNSCALED_COMPONENT_OFFSET = 0x1000, |
| GID_IS_24BIT = 0x2000 |
| }; |
| |
| public: |
| unsigned int get_size () const |
| { |
| unsigned int size = min_size; |
| /* glyphIndex is 24bit instead of 16bit */ |
| if (flags & GID_IS_24BIT) size += HBGlyphID24::static_size - HBGlyphID16::static_size; |
| /* arg1 and 2 are int16 */ |
| if (flags & ARG_1_AND_2_ARE_WORDS) size += 4; |
| /* arg1 and 2 are int8 */ |
| else size += 2; |
| |
| /* One x 16 bit (scale) */ |
| if (flags & WE_HAVE_A_SCALE) size += 2; |
| /* Two x 16 bit (xscale, yscale) */ |
| else if (flags & WE_HAVE_AN_X_AND_Y_SCALE) size += 4; |
| /* Four x 16 bit (xscale, scale01, scale10, yscale) */ |
| else if (flags & WE_HAVE_A_TWO_BY_TWO) size += 8; |
| |
| return size; |
| } |
| |
| void drop_instructions_flag () { flags = (uint16_t) flags & ~WE_HAVE_INSTRUCTIONS; } |
| void set_overlaps_flag () |
| { |
| flags = (uint16_t) flags | OVERLAP_COMPOUND; |
| } |
| |
| bool has_instructions () const { return flags & WE_HAVE_INSTRUCTIONS; } |
| |
| bool has_more () const { return flags & MORE_COMPONENTS; } |
| bool is_use_my_metrics () const { return flags & USE_MY_METRICS; } |
| bool is_anchored () const { return !(flags & ARGS_ARE_XY_VALUES); } |
| void get_anchor_points (unsigned int &point1, unsigned int &point2) const |
| { |
| const auto *p = &StructAfter<const HBUINT8> (flags); |
| if (flags & GID_IS_24BIT) |
| p += HBGlyphID24::static_size; |
| else |
| p += HBGlyphID16::static_size; |
| if (flags & ARG_1_AND_2_ARE_WORDS) |
| { |
| point1 = ((const HBUINT16 *) p)[0]; |
| point2 = ((const HBUINT16 *) p)[1]; |
| } |
| else |
| { |
| point1 = p[0]; |
| point2 = p[1]; |
| } |
| } |
| |
| void transform_points (contour_point_vector_t &points) const |
| { |
| float matrix[4]; |
| contour_point_t trans; |
| if (get_transformation (matrix, trans)) |
| { |
| if (scaled_offsets ()) |
| { |
| points.translate (trans); |
| points.transform (matrix); |
| } |
| else |
| { |
| points.transform (matrix); |
| points.translate (trans); |
| } |
| } |
| } |
| |
| protected: |
| bool scaled_offsets () const |
| { return (flags & (SCALED_COMPONENT_OFFSET | UNSCALED_COMPONENT_OFFSET)) == SCALED_COMPONENT_OFFSET; } |
| |
| bool get_transformation (float (&matrix)[4], contour_point_t &trans) const |
| { |
| matrix[0] = matrix[3] = 1.f; |
| matrix[1] = matrix[2] = 0.f; |
| |
| const auto *p = &StructAfter<const HBINT8> (flags); |
| if (flags & GID_IS_24BIT) |
| p += HBGlyphID24::static_size; |
| else |
| p += HBGlyphID16::static_size; |
| int tx, ty; |
| if (flags & ARG_1_AND_2_ARE_WORDS) |
| { |
| tx = *(const HBINT16 *) p; |
| p += HBINT16::static_size; |
| ty = *(const HBINT16 *) p; |
| p += HBINT16::static_size; |
| } |
| else |
| { |
| tx = *p++; |
| ty = *p++; |
| } |
| if (is_anchored ()) tx = ty = 0; |
| |
| trans.init ((float) tx, (float) ty); |
| |
| { |
| const F2DOT14 *points = (const F2DOT14 *) p; |
| if (flags & WE_HAVE_A_SCALE) |
| { |
| matrix[0] = matrix[3] = points[0].to_float (); |
| return true; |
| } |
| else if (flags & WE_HAVE_AN_X_AND_Y_SCALE) |
| { |
| matrix[0] = points[0].to_float (); |
| matrix[3] = points[1].to_float (); |
| return true; |
| } |
| else if (flags & WE_HAVE_A_TWO_BY_TWO) |
| { |
| matrix[0] = points[0].to_float (); |
| matrix[1] = points[1].to_float (); |
| matrix[2] = points[2].to_float (); |
| matrix[3] = points[3].to_float (); |
| return true; |
| } |
| } |
| return tx || ty; |
| } |
| |
| public: |
| hb_codepoint_t get_gid () const |
| { |
| if (flags & GID_IS_24BIT) |
| return StructAfter<const HBGlyphID24> (flags); |
| else |
| return StructAfter<const HBGlyphID16> (flags); |
| } |
| void set_gid (hb_codepoint_t gid) |
| { |
| if (flags & GID_IS_24BIT) |
| StructAfter<HBGlyphID24> (flags) = gid; |
| else |
| /* TODO assert? */ |
| StructAfter<HBGlyphID16> (flags) = gid; |
| } |
| |
| protected: |
| HBUINT16 flags; |
| HBUINT24 pad; |
| public: |
| DEFINE_SIZE_MIN (4); |
| }; |
| |
| struct composite_iter_t : hb_iter_with_fallback_t<composite_iter_t, const CompositeGlyphRecord &> |
| { |
| typedef const CompositeGlyphRecord *__item_t__; |
| composite_iter_t (hb_bytes_t glyph_, __item_t__ current_) : |
| glyph (glyph_), current (nullptr), current_size (0) |
| { |
| set_current (current_); |
| } |
| |
| composite_iter_t () : glyph (hb_bytes_t ()), current (nullptr), current_size (0) {} |
| |
| item_t __item__ () const { return *current; } |
| bool __more__ () const { return current; } |
| void __next__ () |
| { |
| if (!current->has_more ()) { current = nullptr; return; } |
| |
| set_current (&StructAtOffset<CompositeGlyphRecord> (current, current_size)); |
| } |
| composite_iter_t __end__ () const { return composite_iter_t (); } |
| bool operator != (const composite_iter_t& o) const |
| { return current != o.current; } |
| |
| |
| void set_current (__item_t__ current_) |
| { |
| if (!glyph.check_range (current_, CompositeGlyphRecord::min_size)) |
| { |
| current = nullptr; |
| current_size = 0; |
| return; |
| } |
| unsigned size = current_->get_size (); |
| if (!glyph.check_range (current_, size)) |
| { |
| current = nullptr; |
| current_size = 0; |
| return; |
| } |
| |
| current = current_; |
| current_size = size; |
| } |
| |
| private: |
| hb_bytes_t glyph; |
| __item_t__ current; |
| unsigned current_size; |
| }; |
| |
| struct CompositeGlyph |
| { |
| const GlyphHeader &header; |
| hb_bytes_t bytes; |
| CompositeGlyph (const GlyphHeader &header_, hb_bytes_t bytes_) : |
| header (header_), bytes (bytes_) {} |
| |
| composite_iter_t iter () const |
| { return composite_iter_t (bytes, &StructAfter<CompositeGlyphRecord, GlyphHeader> (header)); } |
| |
| unsigned int instructions_length (hb_bytes_t bytes) const |
| { |
| unsigned int start = bytes.length; |
| unsigned int end = bytes.length; |
| const CompositeGlyphRecord *last = nullptr; |
| for (auto &item : iter ()) |
| last = &item; |
| if (unlikely (!last)) return 0; |
| |
| if (last->has_instructions ()) |
| start = (char *) last - &bytes + last->get_size (); |
| if (unlikely (start > end)) return 0; |
| return end - start; |
| } |
| |
| /* Trimming for composites not implemented. |
| * If removing hints it falls out of that. */ |
| const hb_bytes_t trim_padding () const { return bytes; } |
| |
| void drop_hints () |
| { |
| for (const auto &_ : iter ()) |
| const_cast<CompositeGlyphRecord &> (_).drop_instructions_flag (); |
| } |
| |
| /* Chop instructions off the end */ |
| void drop_hints_bytes (hb_bytes_t &dest_start) const |
| { dest_start = bytes.sub_array (0, bytes.length - instructions_length (bytes)); } |
| |
| void set_overlaps_flag () |
| { |
| CompositeGlyphRecord& glyph_chain = const_cast<CompositeGlyphRecord &> ( |
| StructAfter<CompositeGlyphRecord, GlyphHeader> (header)); |
| if (!bytes.check_range(&glyph_chain, CompositeGlyphRecord::min_size)) |
| return; |
| glyph_chain.set_overlaps_flag (); |
| } |
| }; |
| |
| |
| } /* namespace glyf_impl */ |
| } /* namespace OT */ |
| |
| |
| #endif /* OT_GLYF_COMPOSITEGLYPH_HH */ |