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 | // Functions for normalizing fonts. Since the WOFF 2.0 decoder creates font |
| 16 | // files in normalized form, the WOFF 2.0 conversion is guaranteed to be |
| 17 | // lossless (in a bitwise sense) only for normalized font files. |
| 18 | |
| 19 | #ifndef BROTLI_WOFF2_NORMALIZE_H_ |
| 20 | #define BROTLI_WOFF2_NORMALIZE_H_ |
| 21 | |
| 22 | namespace woff2 { |
| 23 | |
| 24 | struct Font; |
| 25 | |
| 26 | // Changes the offset fields of the table headers so that the data for the |
| 27 | // tables will be written in order of increasing tag values, without any gaps |
| 28 | // other than the 4-byte padding. |
| 29 | bool NormalizeOffsets(Font* font); |
| 30 | |
| 31 | // Changes the checksum fields of the table headers and the checksum field of |
| 32 | // the head table so that it matches the current data. |
| 33 | bool FixChecksums(Font* font); |
| 34 | |
| 35 | // Parses each of the glyphs in the font and writes them again to the glyf |
| 36 | // table in normalized form, as defined by the StoreGlyph() function. Changes |
| 37 | // the loca table accordigly. |
| 38 | bool NormalizeGlyphs(Font* font); |
| 39 | |
| 40 | // Performs all of the normalization steps above. |
| 41 | bool NormalizeFont(Font* font); |
| 42 | |
| 43 | } // namespace woff2 |
| 44 | |
| 45 | #endif // BROTLI_WOFF2_NORMALIZE_H_ |