diff options
Diffstat (limited to 'sfntly/table/bitmap/index_sub_table.h')
| -rw-r--r-- | sfntly/table/bitmap/index_sub_table.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/sfntly/table/bitmap/index_sub_table.h b/sfntly/table/bitmap/index_sub_table.h new file mode 100644 index 0000000..6d27129 --- /dev/null +++ b/sfntly/table/bitmap/index_sub_table.h @@ -0,0 +1,178 @@ +/* + * Copyright 2011 Google Inc. All Rights Reserved. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_H_ +#define SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_H_ + +#include <vector> + +#include "sfntly/port/java_iterator.h" +#include "sfntly/table/subtable.h" +#include "sfntly/table/bitmap/bitmap_glyph_info.h" + +namespace sfntly { + +class IndexSubTable : public SubTable { + public: + struct Format { + enum { + FORMAT_1 = 1, + FORMAT_2 = 2, + FORMAT_3 = 3, + FORMAT_4 = 4, + FORMAT_5 = 5, + }; + }; + + class Builder : public SubTable::Builder { + public: + virtual ~Builder(); + + void Revert(); + + int32_t index_format() { return index_format_; } + int32_t first_glyph_index() { return first_glyph_index_; } + void set_first_glyph_index(int32_t v) { first_glyph_index_ = v; } + int32_t last_glyph_index() { return last_glyph_index_; } + void set_last_glyph_index(int32_t v) { last_glyph_index_ = v; } + int32_t image_format() { return image_format_; } + void set_image_format(int32_t v) { image_format_ = v; } + int32_t image_data_offset() { return image_data_offset_; } + void set_image_data_offset(int32_t v) { image_data_offset_ = v; } + + virtual int32_t NumGlyphs() = 0; + + // Gets the glyph info for the specified glyph id. + // @param glyphId the glyph id to look up + // @return the glyph info + CALLER_ATTACH virtual BitmapGlyphInfo* GlyphInfo(int32_t glyph_id); + + // Gets the full offset of the glyph within the EBDT table. + // @param glyphId the glyph id + // @return the glyph offset + virtual int32_t GlyphOffset(int32_t glyph_id); + + // Gets the offset of the glyph relative to the block for this index + // subtable. + // @param glyphId the glyph id + // @return the glyph offset + virtual int32_t GlyphStartOffset(int32_t glyph_id) = 0; + + // Gets the length of the glyph within the EBDT table. + // @param glyphId the glyph id + // @return the glyph offset + virtual int32_t GlyphLength(int32_t glyph_id) = 0; + + // Note: renamed from java iterator() + CALLER_ATTACH virtual Iterator<BitmapGlyphInfo, IndexSubTable::Builder>* + GetIterator() = 0; + + // Static instantiation function. + static CALLER_ATTACH Builder* CreateBuilder(int32_t index_format); + static CALLER_ATTACH Builder* + CreateBuilder(ReadableFontData* data, + int32_t offset_to_index_sub_table_array, + int32_t array_index); + + // The following methods will never be called but they need to be here to + // allow the BitmapSizeTable to see these methods through an abstract + // reference. + virtual CALLER_ATTACH FontDataTable* SubBuildTable(ReadableFontData* data); + virtual void SubDataSet(); + virtual int32_t SubDataSizeToSerialize(); + virtual bool SubReadyToSerialize(); + virtual int32_t SubSerialize(WritableFontData* new_data); + + protected: + Builder(int32_t data_size, int32_t index_format); + Builder(int32_t index_format, + int32_t image_format, + int32_t image_data_offset, + int32_t data_size); + Builder(WritableFontData* data, + int32_t first_glyph_index, + int32_t last_glyph_index); + Builder(ReadableFontData* data, + int32_t first_glyph_index, + int32_t last_glyph_index); + + // Checks that the glyph id is within the correct range. If it returns the + // offset of the glyph id from the start of the range. + // @param glyphId + // @return the offset of the glyphId from the start of the glyph range + // @throws IndexOutOfBoundsException if the glyph id is not within the + // correct range + int32_t CheckGlyphRange(int32_t glyph_id); + int32_t SerializeIndexSubHeader(WritableFontData* data); + + private: + void Initialize(ReadableFontData* data); + + int32_t first_glyph_index_; + int32_t last_glyph_index_; + int32_t index_format_; + int32_t image_format_; + int32_t image_data_offset_; + }; + + int32_t index_format() { return index_format_; } + int32_t first_glyph_index() { return first_glyph_index_; } + int32_t last_glyph_index() { return last_glyph_index_; } + int32_t image_format() { return image_format_; } + int32_t image_data_offset() { return image_data_offset_; } + + CALLER_ATTACH BitmapGlyphInfo* GlyphInfo(int32_t glyph_id); + virtual int32_t GlyphOffset(int32_t glyph_id); + virtual int32_t GlyphStartOffset(int32_t glyph_id) = 0; + virtual int32_t GlyphLength(int32_t glyph_id) = 0; + virtual int32_t NumGlyphs() = 0; + + static CALLER_ATTACH IndexSubTable* + CreateIndexSubTable(ReadableFontData* data, + int32_t offset_to_index_sub_table_array, + int32_t array_index); + + protected: + // Note: the constructor does not implement offset/length form provided in + // Java to avoid heavy lifting in constructors. Callers to call + // GetDataLength() static method of the derived class to get proper + // length and slice ahead. + IndexSubTable(ReadableFontData* data, + int32_t first_glyph_index, + int32_t last_glyph_index); + + int32_t CheckGlyphRange(int32_t glyph_id); + static int32_t CheckGlyphRange(int32_t glyph_id, + int32_t first_glyph_id, + int32_t last_glyph_id); + + private: + int32_t first_glyph_index_; + int32_t last_glyph_index_; + int32_t index_format_; + int32_t image_format_; + int32_t image_data_offset_; +}; +typedef Ptr<IndexSubTable> IndexSubTablePtr; +typedef std::vector<IndexSubTablePtr> IndexSubTableList; +typedef Ptr<IndexSubTable::Builder> IndexSubTableBuilderPtr; +typedef std::vector<IndexSubTableBuilderPtr> IndexSubTableBuilderList; +typedef Iterator<BitmapGlyphInfo, IndexSubTable::Builder> BitmapGlyphInfoIter; +typedef Ptr<BitmapGlyphInfoIter> BitmapGlyphInfoIterPtr; + +} // namespace sfntly + +#endif // SFNTLY_CPP_SRC_SFNTLY_TABLE_BITMAP_INDEX_SUBTABLE_H_ |