Roderick Sheeter | 437bbad | 2013-11-19 14:32:56 -0800 | [diff] [blame] | 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 | |
Zoltan Szabadka | 494c85c | 2014-03-20 14:35:41 +0100 | [diff] [blame^] | 18 | #ifndef WOFF2_GLYPH_H_ |
| 19 | #define WOFF2_GLYPH_H_ |
Roderick Sheeter | 437bbad | 2013-11-19 14:32:56 -0800 | [diff] [blame] | 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 | |
Zoltan Szabadka | 494c85c | 2014-03-20 14:35:41 +0100 | [diff] [blame^] | 71 | #endif // WOFF2_GLYPH_H_ |