1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/ots/src/layout.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,76 @@
1.4 +// Copyright (c) 2011 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#ifndef OTS_LAYOUT_H_
1.9 +#define OTS_LAYOUT_H_
1.10 +
1.11 +#include "ots.h"
1.12 +
1.13 +// Utility functions for OpenType layout common table formats.
1.14 +// http://www.microsoft.com/typography/otspec/chapter2.htm
1.15 +
1.16 +namespace ots {
1.17 +
1.18 +
1.19 +struct LookupSubtableParser {
1.20 + struct TypeParser {
1.21 + uint16_t type;
1.22 + bool (*parse)(const OpenTypeFile *file, const uint8_t *data,
1.23 + const size_t length);
1.24 + };
1.25 + size_t num_types;
1.26 + uint16_t extension_type;
1.27 + const TypeParser *parsers;
1.28 +
1.29 + bool Parse(const OpenTypeFile *file, const uint8_t *data,
1.30 + const size_t length, const uint16_t lookup_type) const;
1.31 +};
1.32 +
1.33 +bool ParseScriptListTable(const ots::OpenTypeFile *file,
1.34 + const uint8_t *data, const size_t length,
1.35 + const uint16_t num_features);
1.36 +
1.37 +bool ParseFeatureListTable(const ots::OpenTypeFile *file,
1.38 + const uint8_t *data, const size_t length,
1.39 + const uint16_t num_lookups,
1.40 + uint16_t *num_features);
1.41 +
1.42 +bool ParseLookupListTable(OpenTypeFile *file, const uint8_t *data,
1.43 + const size_t length,
1.44 + const LookupSubtableParser* parser,
1.45 + uint16_t* num_lookups);
1.46 +
1.47 +bool ParseClassDefTable(const ots::OpenTypeFile *file,
1.48 + const uint8_t *data, size_t length,
1.49 + const uint16_t num_glyphs,
1.50 + const uint16_t num_classes);
1.51 +
1.52 +bool ParseCoverageTable(const ots::OpenTypeFile *file,
1.53 + const uint8_t *data, size_t length,
1.54 + const uint16_t num_glyphs,
1.55 + const uint16_t expected_num_glyphs = 0);
1.56 +
1.57 +bool ParseDeviceTable(const ots::OpenTypeFile *file,
1.58 + const uint8_t *data, size_t length);
1.59 +
1.60 +// Parser for 'Contextual' subtable shared by GSUB/GPOS tables.
1.61 +bool ParseContextSubtable(const ots::OpenTypeFile *file,
1.62 + const uint8_t *data, const size_t length,
1.63 + const uint16_t num_glyphs,
1.64 + const uint16_t num_lookups);
1.65 +
1.66 +// Parser for 'Chaining Contextual' subtable shared by GSUB/GPOS tables.
1.67 +bool ParseChainingContextSubtable(const ots::OpenTypeFile *file,
1.68 + const uint8_t *data, const size_t length,
1.69 + const uint16_t num_glyphs,
1.70 + const uint16_t num_lookups);
1.71 +
1.72 +bool ParseExtensionSubtable(const OpenTypeFile *file,
1.73 + const uint8_t *data, const size_t length,
1.74 + const LookupSubtableParser* parser);
1.75 +
1.76 +} // namespace ots
1.77 +
1.78 +#endif // OTS_LAYOUT_H_
1.79 +
