// Copyright (c) 2009-2017 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_GLYF_H_

#define OTS_GLYF_H_

#include <new>

#include <utility>

#include <vector>

#include "ots.h"

namespace ots {

class OpenTypeLOCA;

class OpenTypeMAXP;

class OpenTypeGLYF : public Table {

 public:

  explicit OpenTypeGLYF(Font *font, uint32_t tag)

      : Table(font, tag, tag), maxp(NULL) { }

  ~OpenTypeGLYF() {

    for (auto* p : replacements) {

      delete[] p;

    }

  }

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

  bool Serialize(OTSStream *out);

 private:

  struct GidAtLevel {

    uint16_t gid;

    uint32_t level;

  };

  struct ComponentPointCount {

    ComponentPointCount() : accumulated_component_points(0) {};

    uint32_t accumulated_component_points;

    std::vector<GidAtLevel> gid_stack;

  };

  bool ParseFlagsForSimpleGlyph(Buffer &glyph,

                                uint32_t num_flags,

                                std::vector<uint8_t>& flags,

                                uint32_t *flag_index,

                                uint32_t *coordinates_length);

  bool ParseSimpleGlyph(Buffer &glyph,

                        unsigned gid,

                        int16_t num_contours,

                        int16_t xmin,

                        int16_t ymin,

                        int16_t xmax,

                        int16_t ymax,

                        bool is_tricky_font);

  // The skip_count outparam returns the number of bytes from the original

  // glyph description that are being skipped on output (normally zero).

  bool ParseCompositeGlyph(

      Buffer &glyph,

      unsigned glyph_id,

      ComponentPointCount* component_point_count,

      unsigned* skip_count);

  bool TraverseComponentsCountingPoints(

      Buffer& glyph,

      uint16_t base_glyph_id,

      uint32_t level,

      ComponentPointCount* component_point_count);

  Buffer GetGlyphBufferSection(

      const uint8_t *data,

      size_t length,

      const std::vector<uint32_t>& loca_offsets,

      unsigned glyph_id);

  OpenTypeLOCA* loca;

  OpenTypeMAXP* maxp;

  std::vector<std::pair<const uint8_t*, size_t> > iov;

  // Any blocks of replacement data created during parsing are stored here

  // to be available during serialization.

  std::vector<uint8_t*> replacements;

};

}  // namespace ots

#endif  // OTS_GLYF_H_