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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef OTS_LAYOUT_H_ | |
| 6 #define OTS_LAYOUT_H_ | |
| 7 | |
| 8 #include "ots.h" | |
| 9 | |
| 10 // Utility functions for OpenType layout common table formats. | |
| 11 // http://www.microsoft.com/typography/otspec/chapter2.htm | |
| 12 | |
| 13 namespace ots { | |
| 14 | |
| 15 | |
| 16 struct LookupSubtableParser { | |
| 17 struct TypeParser { | |
| 18 uint16_t type; | |
| 19 bool (*parse)(const OpenTypeFile *file, const uint8_t *data, | |
| 20 const size_t length); | |
| 21 }; | |
| 22 size_t num_types; | |
| 23 uint16_t extension_type; | |
| 24 const TypeParser *parsers; | |
| 25 | |
| 26 bool Parse(const OpenTypeFile *file, const uint8_t *data, | |
| 27 const size_t length, const uint16_t lookup_type) const; | |
| 28 }; | |
| 29 | |
| 30 bool ParseScriptListTable(const ots::OpenTypeFile *file, | |
| 31 const uint8_t *data, const size_t length, | |
| 32 const uint16_t num_features); | |
| 33 | |
| 34 bool ParseFeatureListTable(const ots::OpenTypeFile *file, | |
| 35 const uint8_t *data, const size_t length, | |
| 36 const uint16_t num_lookups, | |
| 37 uint16_t *num_features); | |
| 38 | |
| 39 bool ParseLookupListTable(OpenTypeFile *file, const uint8_t *data, | |
| 40 const size_t length, | |
| 41 const LookupSubtableParser* parser, | |
| 42 uint16_t* num_lookups); | |
| 43 | |
| 44 bool ParseClassDefTable(const ots::OpenTypeFile *file, | |
| 45 const uint8_t *data, size_t length, | |
| 46 const uint16_t num_glyphs, | |
| 47 const uint16_t num_classes); | |
| 48 | |
| 49 bool ParseCoverageTable(const ots::OpenTypeFile *file, | |
| 50 const uint8_t *data, size_t length, | |
| 51 const uint16_t num_glyphs, | |
| 52 const uint16_t expected_num_glyphs = 0); | |
| 53 | |
| 54 bool ParseDeviceTable(const ots::OpenTypeFile *file, | |
| 55 const uint8_t *data, size_t length); | |
| 56 | |
| 57 // Parser for 'Contextual' subtable shared by GSUB/GPOS tables. | |
| 58 bool ParseContextSubtable(const ots::OpenTypeFile *file, | |
| 59 const uint8_t *data, const size_t length, | |
| 60 const uint16_t num_glyphs, | |
| 61 const uint16_t num_lookups); | |
| 62 | |
| 63 // Parser for 'Chaining Contextual' subtable shared by GSUB/GPOS tables. | |
| 64 bool ParseChainingContextSubtable(const ots::OpenTypeFile *file, | |
| 65 const uint8_t *data, const size_t length, | |
| 66 const uint16_t num_glyphs, | |
| 67 const uint16_t num_lookups); | |
| 68 | |
| 69 bool ParseExtensionSubtable(const OpenTypeFile *file, | |
| 70 const uint8_t *data, const size_t length, | |
| 71 const LookupSubtableParser* parser); | |
| 72 | |
| 73 } // namespace ots | |
| 74 | |
| 75 #endif // OTS_LAYOUT_H_ | |
| 76 | |
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Chromium Code Reviews
Issue 797183002:
Revert of Updating OTS repo from https://github.com/khaledhosny/ots.git (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master