gfx/ots/src/glyf.h

   1 // Copyright (c) 2009-2017 The OTS 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_GLYF_H_
   6 #define OTS_GLYF_H_
   7
   8 #include <new>
   9 #include <utility>
  10 #include <vector>
  11
  12 #include "ots.h"
  13
  14 namespace ots {
  15 class OpenTypeMAXP;
  16
  17 class OpenTypeGLYF : public Table {
  18  public:
  19   explicit OpenTypeGLYF(Font *font, uint32_t tag)
  20       : Table(font, tag, tag), maxp(NULL) { }
  21
  22   bool Parse(const uint8_t *data, size_t length);
  23   bool Serialize(OTSStream *out);
  24
  25  private:
  26   struct GidAtLevel {
  27     uint16_t gid;
  28     uint32_t level;
  29   };
  30
  31   struct ComponentPointCount {
  32     ComponentPointCount() : accumulated_component_points(0) {};
  33     uint32_t accumulated_component_points;
  34     std::vector<GidAtLevel> gid_stack;
  35   };
  36
  37   bool ParseFlagsForSimpleGlyph(Buffer &glyph,
  38                                 uint32_t num_flags,
  39                                 uint32_t *flag_index,
  40                                 uint32_t *coordinates_length);
  41   bool ParseSimpleGlyph(Buffer &glyph, int16_t num_contours);
  42   bool ParseCompositeGlyph(
  43       Buffer &glyph,
  44       ComponentPointCount* component_point_count);
  45
  46
  47   bool TraverseComponentsCountingPoints(
  48       Buffer& glyph,
  49       uint16_t base_glyph_id,
  50       uint32_t level,
  51       ComponentPointCount* component_point_count);
  52
  53   Buffer GetGlyphBufferSection(
  54       const uint8_t *data,
  55       size_t length,
  56       const std::vector<uint32_t>& loca_offsets,
  57       unsigned glyph_id);
  58
  59   OpenTypeMAXP* maxp;
  60
  61   std::vector<std::pair<const uint8_t*, size_t> > iov;
  62 };
  63
  64 }  // namespace ots
  65
  66 #endif  // OTS_GLYF_H_