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_H_ 18 #define SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_H_ 19 20 #include <vector> 21 22 #include "sfntly/port/java_iterator.h" 23 #include "sfntly/table/subtable.h" 24 #include "sfntly/table/bitmap/bitmap_glyph_info.h" 25 26 namespace sfntly { 27 28 class IndexSubTable : public SubTable { 29 public: 30 struct Format { 31 enum { 32 FORMAT_1 = 1, 33 FORMAT_2 = 2, 34 FORMAT_3 = 3, 35 FORMAT_4 = 4, 36 FORMAT_5 = 5, 37 }; 38 }; 39 40 class Builder : public SubTable::Builder { 41 public: 42 virtual ~Builder(); 43 44 void Revert(); 45 index_format()46 int32_t index_format() { return index_format_; } first_glyph_index()47 int32_t first_glyph_index() { return first_glyph_index_; } set_first_glyph_index(int32_t v)48 void set_first_glyph_index(int32_t v) { first_glyph_index_ = v; } last_glyph_index()49 int32_t last_glyph_index() { return last_glyph_index_; } set_last_glyph_index(int32_t v)50 void set_last_glyph_index(int32_t v) { last_glyph_index_ = v; } image_format()51 int32_t image_format() { return image_format_; } set_image_format(int32_t v)52 void set_image_format(int32_t v) { image_format_ = v; } image_data_offset()53 int32_t image_data_offset() { return image_data_offset_; } set_image_data_offset(int32_t v)54 void set_image_data_offset(int32_t v) { image_data_offset_ = v; } 55 56 virtual int32_t NumGlyphs() = 0; 57 58 // Gets the glyph info for the specified glyph id. 59 // @param glyphId the glyph id to look up 60 // @return the glyph info 61 CALLER_ATTACH virtual BitmapGlyphInfo* GlyphInfo(int32_t glyph_id); 62 63 // Gets the full offset of the glyph within the EBDT table. 64 // @param glyphId the glyph id 65 // @return the glyph offset 66 virtual int32_t GlyphOffset(int32_t glyph_id); 67 68 // Gets the offset of the glyph relative to the block for this index 69 // subtable. 70 // @param glyphId the glyph id 71 // @return the glyph offset 72 virtual int32_t GlyphStartOffset(int32_t glyph_id) = 0; 73 74 // Gets the length of the glyph within the EBDT table. 75 // @param glyphId the glyph id 76 // @return the glyph offset 77 virtual int32_t GlyphLength(int32_t glyph_id) = 0; 78 79 // Note: renamed from java iterator() 80 CALLER_ATTACH virtual Iterator<BitmapGlyphInfo, IndexSubTable::Builder>* 81 GetIterator() = 0; 82 83 // Static instantiation function. 84 static CALLER_ATTACH Builder* CreateBuilder(int32_t index_format); 85 static CALLER_ATTACH Builder* 86 CreateBuilder(ReadableFontData* data, 87 int32_t offset_to_index_sub_table_array, 88 int32_t array_index); 89 90 // The following methods will never be called but they need to be here to 91 // allow the BitmapSizeTable to see these methods through an abstract 92 // reference. 93 virtual CALLER_ATTACH FontDataTable* SubBuildTable(ReadableFontData* data); 94 virtual void SubDataSet(); 95 virtual int32_t SubDataSizeToSerialize(); 96 virtual bool SubReadyToSerialize(); 97 virtual int32_t SubSerialize(WritableFontData* new_data); 98 99 protected: 100 Builder(int32_t data_size, int32_t index_format); 101 Builder(int32_t index_format, 102 int32_t image_format, 103 int32_t image_data_offset, 104 int32_t data_size); 105 Builder(WritableFontData* data, 106 int32_t first_glyph_index, 107 int32_t last_glyph_index); 108 Builder(ReadableFontData* data, 109 int32_t first_glyph_index, 110 int32_t last_glyph_index); 111 112 // Checks that the glyph id is within the correct range. If it returns the 113 // offset of the glyph id from the start of the range. 114 // @param glyphId 115 // @return the offset of the glyphId from the start of the glyph range 116 // @throws IndexOutOfBoundsException if the glyph id is not within the 117 // correct range 118 int32_t CheckGlyphRange(int32_t glyph_id); 119 int32_t SerializeIndexSubHeader(WritableFontData* data); 120 121 private: 122 void Initialize(ReadableFontData* data); 123 124 int32_t first_glyph_index_; 125 int32_t last_glyph_index_; 126 int32_t index_format_; 127 int32_t image_format_; 128 int32_t image_data_offset_; 129 }; 130 index_format()131 int32_t index_format() { return index_format_; } first_glyph_index()132 int32_t first_glyph_index() { return first_glyph_index_; } last_glyph_index()133 int32_t last_glyph_index() { return last_glyph_index_; } image_format()134 int32_t image_format() { return image_format_; } image_data_offset()135 int32_t image_data_offset() { return image_data_offset_; } 136 137 CALLER_ATTACH BitmapGlyphInfo* GlyphInfo(int32_t glyph_id); 138 virtual int32_t GlyphOffset(int32_t glyph_id); 139 virtual int32_t GlyphStartOffset(int32_t glyph_id) = 0; 140 virtual int32_t GlyphLength(int32_t glyph_id) = 0; 141 virtual int32_t NumGlyphs() = 0; 142 143 static CALLER_ATTACH IndexSubTable* 144 CreateIndexSubTable(ReadableFontData* data, 145 int32_t offset_to_index_sub_table_array, 146 int32_t array_index); 147 148 protected: 149 // Note: the constructor does not implement offset/length form provided in 150 // Java to avoid heavy lifting in constructors. Callers to call 151 // GetDataLength() static method of the derived class to get proper 152 // length and slice ahead. 153 IndexSubTable(ReadableFontData* data, 154 int32_t first_glyph_index, 155 int32_t last_glyph_index); 156 157 int32_t CheckGlyphRange(int32_t glyph_id); 158 static int32_t CheckGlyphRange(int32_t glyph_id, 159 int32_t first_glyph_id, 160 int32_t last_glyph_id); 161 162 private: 163 int32_t first_glyph_index_; 164 int32_t last_glyph_index_; 165 int32_t index_format_; 166 int32_t image_format_; 167 int32_t image_data_offset_; 168 }; 169 typedef Ptr<IndexSubTable> IndexSubTablePtr; 170 typedef std::vector<IndexSubTablePtr> IndexSubTableList; 171 typedef Ptr<IndexSubTable::Builder> IndexSubTableBuilderPtr; 172 typedef std::vector<IndexSubTableBuilderPtr> IndexSubTableBuilderList; 173 typedef Iterator<BitmapGlyphInfo, IndexSubTable::Builder> BitmapGlyphInfoIter; 174 typedef Ptr<BitmapGlyphInfoIter> BitmapGlyphInfoIterPtr; 175 176 } // namespace sfntly 177 178 #endif // SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_H_ 179