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_INDEX_SUBTABLE_FORMAT4_H_
18#define SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_FORMAT4_H_
19
20#include "sfntly/table/bitmap/index_sub_table.h"
21
22namespace sfntly {
23
24class IndexSubTableFormat4 : public IndexSubTable,
25                             public RefCounted<IndexSubTableFormat4> {
26 public:
27  class CodeOffsetPair {
28   public:
29    int32_t glyph_code() const { return glyph_code_; }
30    int32_t offset() const { return offset_; }
31
32   protected:
33    CodeOffsetPair(int32_t glyph_code, int32_t offset);
34
35    // TODO(arthurhsu): C++ style guide prohibits protected members.
36    int32_t glyph_code_;
37    int32_t offset_;
38  };
39
40  class CodeOffsetPairBuilder : public CodeOffsetPair {
41   public:
42    CodeOffsetPairBuilder();
43    CodeOffsetPairBuilder(int32_t glyph_code, int32_t offset);
44    void set_glyph_code(int32_t v) { glyph_code_ = v; }
45    void set_offset(int32_t v) { offset_ = v; }
46  };
47
48  class CodeOffsetPairGlyphCodeComparator {
49   public:
50    bool operator()(const CodeOffsetPair& lhs, const CodeOffsetPair& rhs);
51  };
52
53  class Builder : public IndexSubTable::Builder,
54                  public RefCounted<Builder> {
55   public:
56    class BitmapGlyphInfoIterator
57        : public RefIterator<BitmapGlyphInfo, Builder, IndexSubTable::Builder> {
58     public:
59      explicit BitmapGlyphInfoIterator(Builder* container);
60      virtual ~BitmapGlyphInfoIterator() {}
61
62      virtual bool HasNext();
63      CALLER_ATTACH virtual BitmapGlyphInfo* Next();
64
65     private:
66      int32_t code_offset_pair_index_;
67    };
68
69    virtual ~Builder();
70    virtual int32_t NumGlyphs();
71    virtual int32_t GlyphLength(int32_t glyph_id);
72    virtual int32_t GlyphStartOffset(int32_t glyph_id);
73    CALLER_ATTACH virtual BitmapGlyphInfoIterator* GetIterator();
74
75    virtual CALLER_ATTACH FontDataTable* SubBuildTable(ReadableFontData* data);
76    virtual void SubDataSet();
77    virtual int32_t SubDataSizeToSerialize();
78    virtual bool SubReadyToSerialize();
79    virtual int32_t SubSerialize(WritableFontData* new_data);
80
81    void Revert();
82    void SetOffsetArray(const std::vector<CodeOffsetPairBuilder>& pair_array);
83
84    static CALLER_ATTACH Builder* CreateBuilder();
85    static CALLER_ATTACH Builder* CreateBuilder(ReadableFontData* data,
86                                                int32_t index_sub_table_offset,
87                                                int32_t first_glyph_index,
88                                                int32_t last_glyph_index);
89    static CALLER_ATTACH Builder* CreateBuilder(WritableFontData* data,
90                                                int32_t index_sub_table_offset,
91                                                int32_t first_glyph_index,
92                                                int32_t last_glyph_index);
93   private:
94    Builder();
95    Builder(WritableFontData* data,
96            int32_t first_glyph_index,
97            int32_t last_glyph_index);
98    Builder(ReadableFontData* data,
99            int32_t first_glyph_index,
100            int32_t last_glyph_index);
101    std::vector<CodeOffsetPairBuilder>* GetOffsetArray();
102    void Initialize(ReadableFontData* data);
103    int32_t FindCodeOffsetPair(int32_t glyph_id);
104
105    static int32_t DataLength(ReadableFontData* data,
106                              int32_t index_sub_table_offset,
107                              int32_t first_glyph_index,
108                              int32_t last_glyph_index);
109
110    std::vector<CodeOffsetPairBuilder> offset_pair_array_;
111  };
112
113  virtual ~IndexSubTableFormat4();
114
115  virtual int32_t NumGlyphs();
116  virtual int32_t GlyphStartOffset(int32_t glyph_id);
117  virtual int32_t GlyphLength(int32_t glyph_id);
118
119 private:
120  IndexSubTableFormat4(ReadableFontData* data,
121                       int32_t first_glyph_index,
122                       int32_t last_glyph_index);
123
124  int32_t FindCodeOffsetPair(int32_t glyph_id);
125  static int32_t NumGlyphs(ReadableFontData* data, int32_t table_offset);
126
127  friend class Builder;
128};
129typedef Ptr<IndexSubTableFormat4> IndexSubTableFormat4Ptr;
130typedef Ptr<IndexSubTableFormat4::Builder> IndexSubTableFormat4BuilderPtr;
131typedef std::vector<IndexSubTableFormat4::CodeOffsetPairBuilder>
132            CodeOffsetPairBuilderList;
133}  // namespace sfntly
134
135#endif  // SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_FORMAT4_H_
136