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Side by Side Diff: third_party/ots/src/layout.h

Issue 1252363005: Update OTS to revision a7a3b94 (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 4 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef OTS_LAYOUT_H_ 5 #ifndef OTS_LAYOUT_H_
6 #define OTS_LAYOUT_H_ 6 #define OTS_LAYOUT_H_
7 7
8 #include "ots.h" 8 #include "ots.h"
9 9
10 // Utility functions for OpenType layout common table formats. 10 // Utility functions for OpenType layout common table formats.
11 // http://www.microsoft.com/typography/otspec/chapter2.htm 11 // http://www.microsoft.com/typography/otspec/chapter2.htm
12 12
13 namespace ots { 13 namespace ots {
14 14
15 15
16 struct LookupSubtableParser { 16 struct LookupSubtableParser {
17 struct TypeParser { 17 struct TypeParser {
18 uint16_t type; 18 uint16_t type;
19 bool (*parse)(const OpenTypeFile *file, const uint8_t *data, 19 bool (*parse)(const Font *font, const uint8_t *data,
20 const size_t length); 20 const size_t length);
21 }; 21 };
22 size_t num_types; 22 size_t num_types;
23 uint16_t extension_type; 23 uint16_t extension_type;
24 const TypeParser *parsers; 24 const TypeParser *parsers;
25 25
26 bool Parse(const OpenTypeFile *file, const uint8_t *data, 26 bool Parse(const Font *font, const uint8_t *data,
27 const size_t length, const uint16_t lookup_type) const; 27 const size_t length, const uint16_t lookup_type) const;
28 }; 28 };
29 29
30 bool ParseScriptListTable(const ots::OpenTypeFile *file, 30 bool ParseScriptListTable(const ots::Font *font,
31 const uint8_t *data, const size_t length, 31 const uint8_t *data, const size_t length,
32 const uint16_t num_features); 32 const uint16_t num_features);
33 33
34 bool ParseFeatureListTable(const ots::OpenTypeFile *file, 34 bool ParseFeatureListTable(const ots::Font *font,
35 const uint8_t *data, const size_t length, 35 const uint8_t *data, const size_t length,
36 const uint16_t num_lookups, 36 const uint16_t num_lookups,
37 uint16_t *num_features); 37 uint16_t *num_features);
38 38
39 bool ParseLookupListTable(OpenTypeFile *file, const uint8_t *data, 39 bool ParseLookupListTable(Font *font, const uint8_t *data,
40 const size_t length, 40 const size_t length,
41 const LookupSubtableParser* parser, 41 const LookupSubtableParser* parser,
42 uint16_t* num_lookups); 42 uint16_t* num_lookups);
43 43
44 bool ParseClassDefTable(const ots::OpenTypeFile *file, 44 bool ParseClassDefTable(const ots::Font *font,
45 const uint8_t *data, size_t length, 45 const uint8_t *data, size_t length,
46 const uint16_t num_glyphs, 46 const uint16_t num_glyphs,
47 const uint16_t num_classes); 47 const uint16_t num_classes);
48 48
49 bool ParseCoverageTable(const ots::OpenTypeFile *file, 49 bool ParseCoverageTable(const ots::Font *font,
50 const uint8_t *data, size_t length, 50 const uint8_t *data, size_t length,
51 const uint16_t num_glyphs, 51 const uint16_t num_glyphs,
52 const uint16_t expected_num_glyphs = 0); 52 const uint16_t expected_num_glyphs = 0);
53 53
54 bool ParseDeviceTable(const ots::OpenTypeFile *file, 54 bool ParseDeviceTable(const ots::Font *font,
55 const uint8_t *data, size_t length); 55 const uint8_t *data, size_t length);
56 56
57 // Parser for 'Contextual' subtable shared by GSUB/GPOS tables. 57 // Parser for 'Contextual' subtable shared by GSUB/GPOS tables.
58 bool ParseContextSubtable(const ots::OpenTypeFile *file, 58 bool ParseContextSubtable(const ots::Font *font,
59 const uint8_t *data, const size_t length, 59 const uint8_t *data, const size_t length,
60 const uint16_t num_glyphs, 60 const uint16_t num_glyphs,
61 const uint16_t num_lookups); 61 const uint16_t num_lookups);
62 62
63 // Parser for 'Chaining Contextual' subtable shared by GSUB/GPOS tables. 63 // Parser for 'Chaining Contextual' subtable shared by GSUB/GPOS tables.
64 bool ParseChainingContextSubtable(const ots::OpenTypeFile *file, 64 bool ParseChainingContextSubtable(const ots::Font *font,
65 const uint8_t *data, const size_t length, 65 const uint8_t *data, const size_t length,
66 const uint16_t num_glyphs, 66 const uint16_t num_glyphs,
67 const uint16_t num_lookups); 67 const uint16_t num_lookups);
68 68
69 bool ParseExtensionSubtable(const OpenTypeFile *file, 69 bool ParseExtensionSubtable(const Font *font,
70 const uint8_t *data, const size_t length, 70 const uint8_t *data, const size_t length,
71 const LookupSubtableParser* parser); 71 const LookupSubtableParser* parser);
72 72
73 } // namespace ots 73 } // namespace ots
74 74
75 #endif // OTS_LAYOUT_H_ 75 #endif // OTS_LAYOUT_H_
76 76
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