1/*
2 * Copyright 2011 Google Inc. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0  = the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_BITMAP_GLYPH_H_
18#define SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_BITMAP_GLYPH_H_
19
20#include <vector>
21#include <map>
22
23#include "sfntly/table/subtable.h"
24
25namespace sfntly {
26
27class BitmapGlyph : public SubTable {
28 public:
29  struct Offset {
30    enum {
31      // header
32      kVersion = 0,
33
34      kSmallGlyphMetricsLength = 5,
35      kBigGlyphMetricsLength = 8,
36      // format 1
37      kGlyphFormat1_imageData = kSmallGlyphMetricsLength,
38
39      // format 2
40      kGlyphFormat2_imageData = kSmallGlyphMetricsLength,
41
42      // format 3
43
44      // format 4
45
46      // format 5
47      kGlyphFormat5_imageData = 0,
48
49      // format 6
50      kGlyphFormat6_imageData = kBigGlyphMetricsLength,
51
52      // format 7
53      kGlyphFormat7_imageData = kBigGlyphMetricsLength,
54
55      // format 8
56      kGlyphFormat8_numComponents = kSmallGlyphMetricsLength + 1,
57      kGlyphFormat8_componentArray = kGlyphFormat8_numComponents +
58                                     DataSize::kUSHORT,
59
60      // format 9
61      kGlyphFormat9_numComponents = kBigGlyphMetricsLength,
62      kGlyphFormat9_componentArray = kGlyphFormat9_numComponents +
63                                     DataSize::kUSHORT,
64
65      // ebdtComponent
66      kEbdtComponentLength = DataSize::kUSHORT + 2 * DataSize::kCHAR,
67      kEbdtComponent_glyphCode = 0,
68      kEbdtComponent_xOffset = 2,
69      kEbdtComponent_yOffset = 3,
70    };
71  };
72
73  // TODO(stuartg): builder is not functional at all
74  // - need to add subclasses for each type of bitmap glyph
75  class Builder : public SubTable::Builder {
76   public:
77    virtual ~Builder();
78
79    virtual CALLER_ATTACH FontDataTable* SubBuildTable(ReadableFontData* data);
80    virtual void SubDataSet();
81    virtual int32_t SubDataSizeToSerialize();
82    virtual bool SubReadyToSerialize();
83    virtual int32_t SubSerialize(WritableFontData* new_data);
84
85    int32_t format() { return format_; }
86
87    static CALLER_ATTACH Builder* CreateGlyphBuilder(ReadableFontData* data,
88                                                     int32_t format);
89
90   protected:
91    Builder(WritableFontData* data, int32_t format);
92    Builder(ReadableFontData* data, int32_t format);
93
94   private:
95    int32_t format_;
96  };
97
98  virtual ~BitmapGlyph();
99
100  static CALLER_ATTACH BitmapGlyph* CreateGlyph(ReadableFontData* data,
101                                                int32_t format);
102  int32_t format() { return format_; }
103
104  // UNIMPLEMENTED: toString()
105
106 protected:
107  BitmapGlyph(ReadableFontData* data, int32_t format);
108
109 private:
110  int32_t format_;
111};
112typedef Ptr<BitmapGlyph> BitmapGlyphPtr;
113typedef Ptr<BitmapGlyph::Builder> BitmapGlyphBuilderPtr;
114typedef std::map<int32_t, BitmapGlyphBuilderPtr> BitmapGlyphBuilderMap;
115typedef std::vector<BitmapGlyphBuilderMap> BitmapGlyphBuilderList;
116
117}  // namespace sfntly
118
119#endif  // SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_BITMAP_GLYPH_H_
120