1 // Copyright 2013 Google Inc. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 // Data model and I/O for glyph data within sfnt format files for the purpose of 16 // performing the preprocessing step of the WOFF 2.0 conversion. 17 18 #ifndef WOFF2_GLYPH_H_ 19 #define WOFF2_GLYPH_H_ 20 21 #include <stddef.h> 22 #include <inttypes.h> 23 #include <vector> 24 25 namespace woff2 { 26 27 // Represents a parsed simple or composite glyph. The composite glyph data and 28 // instructions are un-parsed and we keep only pointers to the raw data, 29 // therefore the glyph is valid only so long the data from which it was parsed 30 // is around. 31 class Glyph { 32 public: 33 Glyph() : instructions_size(0), composite_data_size(0) {} 34 35 // Bounding box. 36 int16_t x_min; 37 int16_t x_max; 38 int16_t y_min; 39 int16_t y_max; 40 41 // Instructions. 42 uint16_t instructions_size; 43 const uint8_t* instructions_data; 44 45 // Data model for simple glyphs. 46 struct Point { 47 int x; 48 int y; 49 bool on_curve; 50 }; 51 std::vector<std::vector<Point> > contours; 52 53 // Data for composite glyphs. 54 const uint8_t* composite_data; 55 uint32_t composite_data_size; 56 bool have_instructions; 57 }; 58 59 // Parses the glyph from the given data. Returns false on parsing failure or 60 // buffer overflow. The glyph is valid only so long the input data pointer is 61 // valid. 62 bool ReadGlyph(const uint8_t* data, size_t len, Glyph* glyph); 63 64 // Stores the glyph into the specified dst buffer. The *dst_size is the buffer 65 // size on entry and is set to the actual (unpadded) stored size on exit. 66 // Returns false on buffer overflow. 67 bool StoreGlyph(const Glyph& glyph, uint8_t* dst, size_t* dst_size); 68 69 } // namespace woff2 70 71 #endif // WOFF2_GLYPH_H_ 72
