gsub.h - mozsearch

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// Copyright (c) 2011-2017 The OTS Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

#ifndef OTS_GSUB_H_

#define OTS_GSUB_H_

#include "ots.h"

#include "layout.h"

namespace ots {

class OpenTypeGSUB : public OpenTypeLayoutTable {

 public:

  explicit OpenTypeGSUB(Font *font, uint32_t tag)

      : OpenTypeLayoutTable(font, tag, tag) { }

 private:

  bool ValidLookupSubtableType(uint16_t lookup_type,

                               bool extension = false) const;

  bool ParseLookupSubtable(const uint8_t *data, const size_t length,

                           const uint16_t lookup_type);

  bool ParseSingleSubstitution(const uint8_t *data, const size_t length);

  bool ParseMutipleSubstitution(const uint8_t *data, const size_t length);

  bool ParseAlternateSubstitution(const uint8_t *data, const size_t length);

  bool ParseLigatureSubstitution(const uint8_t *data, const size_t length);

  bool ParseReverseChainingContextSingleSubstitution(const uint8_t *data, const size_t length);

};

}  // namespace ots

#endif  // OTS_GSUB_H_