gfx/ots/src/cmap.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_CMAP_H_
   6 #define OTS_CMAP_H_
   7
   8 #include <vector>
   9
  10 #include "ots.h"
  11
  12 namespace ots {
  13
  14 struct OpenTypeCMAPSubtableRange {
  15   uint32_t start_range;
  16   uint32_t end_range;
  17   uint32_t start_glyph_id;
  18 };
  19
  20 struct OpenTypeCMAPSubtableVSRange {
  21   uint32_t unicode_value;
  22   uint8_t additional_count;
  23 };
  24
  25 struct OpenTypeCMAPSubtableVSMapping {
  26   uint32_t unicode_value;
  27   uint16_t glyph_id;
  28 };
  29
  30 struct OpenTypeCMAPSubtableVSRecord {
  31   uint32_t var_selector;
  32   uint32_t default_offset;
  33   uint32_t non_default_offset;
  34   std::vector<OpenTypeCMAPSubtableVSRange> ranges;
  35   std::vector<OpenTypeCMAPSubtableVSMapping> mappings;
  36 };
  37
  38 class OpenTypeCMAP : public Table {
  39  public:
  40   explicit OpenTypeCMAP(Font *font, uint32_t tag)
  41       : Table(font, tag, tag),
  42         subtable_0_3_4_data(NULL),
  43         subtable_0_3_4_length(0),
  44         subtable_0_5_14_length(0),
  45         subtable_3_0_4_data(NULL),
  46         subtable_3_0_4_length(0),
  47         subtable_3_1_4_data(NULL),
  48         subtable_3_1_4_length(0) {
  49   }
  50
  51   bool Parse(const uint8_t *data, size_t length);
  52   bool Serialize(OTSStream *out);
  53
  54  private:
  55   // Platform 0, Encoding 3, Format 4, Unicode BMP table.
  56   const uint8_t *subtable_0_3_4_data;
  57   size_t subtable_0_3_4_length;
  58
  59   // Platform 0, Encoding 5, Format 14, Unicode Variation Sequence table.
  60   size_t subtable_0_5_14_length;
  61   std::vector<OpenTypeCMAPSubtableVSRecord> subtable_0_5_14;
  62
  63   // Platform 3, Encoding 0, Format 4, MS Symbol table.
  64   const uint8_t *subtable_3_0_4_data;
  65   size_t subtable_3_0_4_length;
  66   // Platform 3, Encoding 1, Format 4, MS Unicode BMP table.
  67   const uint8_t *subtable_3_1_4_data;
  68   size_t subtable_3_1_4_length;
  69
  70   // Platform 3, Encoding 10, Format 12, MS Unicode UCS-4 table.
  71   std::vector<OpenTypeCMAPSubtableRange> subtable_3_10_12;
  72   // Platform 3, Encoding 10, Format 13, MS UCS-4 Fallback table.
  73   std::vector<OpenTypeCMAPSubtableRange> subtable_3_10_13;
  74   // Platform 1, Encoding 0, Format 0, Mac Roman table.
  75   std::vector<uint8_t> subtable_1_0_0;
  76
  77   bool ParseFormat4(int platform, int encoding, const uint8_t *data,
  78                     size_t length, uint16_t num_glyphs);
  79   bool Parse31012(const uint8_t *data, size_t length, uint16_t num_glyphs);
  80   bool Parse31013(const uint8_t *data, size_t length, uint16_t num_glyphs);
  81   bool Parse0514(const uint8_t *data, size_t length);
  82   bool Parse100(const uint8_t *data, size_t length);
  83 };
  84
  85 }  // namespace ots
  86
  87 #endif