diff options
Diffstat (limited to 'sfntly/table/bitmap/index_sub_table_format3.cc')
| -rw-r--r-- | sfntly/table/bitmap/index_sub_table_format3.cc | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/sfntly/table/bitmap/index_sub_table_format3.cc b/sfntly/table/bitmap/index_sub_table_format3.cc new file mode 100644 index 0000000..e2679b7 --- /dev/null +++ b/sfntly/table/bitmap/index_sub_table_format3.cc @@ -0,0 +1,298 @@ +/* + * 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. + */ + +#include "sfntly/table/bitmap/index_sub_table_format3.h" + +#include "sfntly/table/bitmap/eblc_table.h" + +namespace sfntly { +/****************************************************************************** + * IndexSubTableFormat3 class + ******************************************************************************/ +IndexSubTableFormat3::~IndexSubTableFormat3() { +} + +int32_t IndexSubTableFormat3::NumGlyphs() { + return last_glyph_index() - first_glyph_index() + 1; +} + +int32_t IndexSubTableFormat3::GlyphStartOffset(int32_t glyph_id) { + int32_t loca = CheckGlyphRange(glyph_id); + if (loca != -1) { + return Loca(loca); + } + return -1; +} + +int32_t IndexSubTableFormat3::GlyphLength(int32_t glyph_id) { + int32_t loca = CheckGlyphRange(glyph_id); + if (loca != -1) { + return Loca(glyph_id + 1) - Loca(glyph_id); + } + return 0; +} + +// static +int32_t IndexSubTableFormat3::GetDataLength(ReadableFontData* data, + int32_t offset, + int32_t first, + int32_t last) { + UNREFERENCED_PARAMETER(data); + UNREFERENCED_PARAMETER(offset); + return (last - first + 1 + 1) * DataSize::kUSHORT; +} + +IndexSubTableFormat3::IndexSubTableFormat3(ReadableFontData* data, + int32_t first_glyph_index, + int32_t last_glyph_index) + : IndexSubTable(data, first_glyph_index, last_glyph_index) { +} + +int32_t IndexSubTableFormat3::Loca(int32_t loca) { + int32_t read_offset = + data_->ReadUShort(EblcTable::Offset::kIndexSubTable3_offsetArray + + loca * DataSize::kUSHORT); + return read_offset; +} + +/****************************************************************************** + * IndexSubTableFormat3::Builder class + ******************************************************************************/ +IndexSubTableFormat3::Builder::~Builder() { +} + +int32_t IndexSubTableFormat3::Builder::NumGlyphs() { + return GetOffsetArray()->size() - 1; +} + +int32_t IndexSubTableFormat3::Builder::GlyphStartOffset(int32_t glyph_id) { + int32_t loca = CheckGlyphRange(glyph_id); + if (loca == -1) { + return -1; + } + return GetOffsetArray()->at(loca); +} + +int32_t IndexSubTableFormat3::Builder::GlyphLength(int32_t glyph_id) { + int32_t loca = CheckGlyphRange(glyph_id); + if (loca == -1) { + return 0; + } + IntegerList* offset_array = GetOffsetArray(); + return offset_array->at(loca + 1) - offset_array->at(loca); +} + +CALLER_ATTACH IndexSubTableFormat3::Builder::BitmapGlyphInfoIterator* + IndexSubTableFormat3::Builder::GetIterator() { + Ptr<IndexSubTableFormat3::Builder::BitmapGlyphInfoIterator> it = + new IndexSubTableFormat3::Builder::BitmapGlyphInfoIterator(this); + return it.Detach(); +} + +void IndexSubTableFormat3::Builder::Revert() { + offset_array_.clear(); + IndexSubTable::Builder::Revert(); +} + +void IndexSubTableFormat3::Builder::SetOffsetArray( + const IntegerList& offset_array) { + offset_array_.clear(); + offset_array_ = offset_array; + set_model_changed(); +} + +// static +CALLER_ATTACH IndexSubTableFormat3::Builder* +IndexSubTableFormat3::Builder::CreateBuilder() { + IndexSubTableFormat3BuilderPtr output = new IndexSubTableFormat3::Builder(); + return output.Detach(); +} + +// static +CALLER_ATTACH IndexSubTableFormat3::Builder* +IndexSubTableFormat3::Builder::CreateBuilder(ReadableFontData* data, + int32_t index_sub_table_offset, + int32_t first_glyph_index, + int32_t last_glyph_index) { + int32_t length = Builder::DataLength(data, + index_sub_table_offset, + first_glyph_index, + last_glyph_index); + ReadableFontDataPtr new_data; + new_data.Attach(down_cast<ReadableFontData*>( + data->Slice(index_sub_table_offset, length))); + if (new_data == NULL) { + return NULL; + } + IndexSubTableFormat3BuilderPtr output = + new IndexSubTableFormat3::Builder(new_data, + first_glyph_index, + last_glyph_index); + return output.Detach(); +} + +// static +CALLER_ATTACH IndexSubTableFormat3::Builder* +IndexSubTableFormat3::Builder::CreateBuilder(WritableFontData* data, + int32_t index_sub_table_offset, + int32_t first_glyph_index, + int32_t last_glyph_index) { + int32_t length = Builder::DataLength(data, + index_sub_table_offset, + first_glyph_index, + last_glyph_index); + WritableFontDataPtr new_data; + new_data.Attach(down_cast<WritableFontData*>( + data->Slice(index_sub_table_offset, length))); + IndexSubTableFormat3BuilderPtr output = + new IndexSubTableFormat3::Builder(new_data, + first_glyph_index, + last_glyph_index); + return output.Detach(); +} + +CALLER_ATTACH FontDataTable* IndexSubTableFormat3::Builder::SubBuildTable( + ReadableFontData* data) { + IndexSubTableFormat3Ptr output = new IndexSubTableFormat3( + data, first_glyph_index(), last_glyph_index()); + return output.Detach(); +} + +void IndexSubTableFormat3::Builder::SubDataSet() { + Revert(); +} + +int32_t IndexSubTableFormat3::Builder::SubDataSizeToSerialize() { + if (offset_array_.empty()) { + return InternalReadData()->Length(); + } + return EblcTable::Offset::kIndexSubHeaderLength + + offset_array_.size() * DataSize::kULONG; +} + +bool IndexSubTableFormat3::Builder::SubReadyToSerialize() { + if (!offset_array_.empty()) { + return true; + } + return false; +} + +int32_t IndexSubTableFormat3::Builder::SubSerialize( + WritableFontData* new_data) { + int32_t size = SerializeIndexSubHeader(new_data); + if (!model_changed()) { + if (InternalReadData() == NULL) { + return size; + } + ReadableFontDataPtr source; + WritableFontDataPtr target; + source.Attach(down_cast<ReadableFontData*>(InternalReadData()->Slice( + EblcTable::Offset::kIndexSubTable3_offsetArray))); + target.Attach(down_cast<WritableFontData*>(new_data->Slice( + EblcTable::Offset::kIndexSubTable3_offsetArray))); + size += source->CopyTo(target); + } else { + for (IntegerList::iterator b = GetOffsetArray()->begin(), + e = GetOffsetArray()->end(); b != e; b++) { + size += new_data->WriteUShort(size, *b); + } + } + return size; +} + +IndexSubTableFormat3::Builder::Builder() + : IndexSubTable::Builder(EblcTable::Offset::kIndexSubTable3_builderDataSize, + IndexSubTable::Format::FORMAT_3) { +} + +IndexSubTableFormat3::Builder::Builder(WritableFontData* data, + int32_t first_glyph_index, + int32_t last_glyph_index) + : IndexSubTable::Builder(data, first_glyph_index, last_glyph_index) { +} + +IndexSubTableFormat3::Builder::Builder(ReadableFontData* data, + int32_t first_glyph_index, + int32_t last_glyph_index) + : IndexSubTable::Builder(data, first_glyph_index, last_glyph_index) { +} + +IntegerList* IndexSubTableFormat3::Builder::GetOffsetArray() { + if (offset_array_.empty()) { + Initialize(InternalReadData()); + set_model_changed(); + } + return &offset_array_; +} + +void IndexSubTableFormat3::Builder::Initialize(ReadableFontData* data) { + offset_array_.clear(); + if (data) { + int32_t num_offsets = (last_glyph_index() - first_glyph_index() + 1) + 1; + for (int32_t i = 0; i < num_offsets; ++i) { + offset_array_.push_back(data->ReadUShort( + EblcTable::Offset::kIndexSubTable3_offsetArray + + i * DataSize::kUSHORT)); + } + } +} + +// static +int32_t IndexSubTableFormat3::Builder::DataLength( + ReadableFontData* data, + int32_t index_sub_table_offset, + int32_t first_glyph_index, + int32_t last_glyph_index) { + UNREFERENCED_PARAMETER(data); + UNREFERENCED_PARAMETER(index_sub_table_offset); + return EblcTable::Offset::kIndexSubHeaderLength + + (last_glyph_index - first_glyph_index + 1 + 1) * DataSize::kUSHORT; +} + +/****************************************************************************** + * IndexSubTableFormat3::Builder::BitmapGlyphInfoIterator class + ******************************************************************************/ +IndexSubTableFormat3::Builder::BitmapGlyphInfoIterator::BitmapGlyphInfoIterator( + IndexSubTableFormat3::Builder* container) + : RefIterator<BitmapGlyphInfo, IndexSubTableFormat3::Builder, + IndexSubTable::Builder>(container) { + glyph_id_ = container->first_glyph_index(); +} + +bool IndexSubTableFormat3::Builder::BitmapGlyphInfoIterator::HasNext() { + if (glyph_id_ <= container()->last_glyph_index()) { + return true; + } + return false; +} + +CALLER_ATTACH BitmapGlyphInfo* +IndexSubTableFormat3::Builder::BitmapGlyphInfoIterator::Next() { + BitmapGlyphInfoPtr output; + if (!HasNext()) { + // Note: In C++, we do not throw exception when there's no element. + return NULL; + } + output = new BitmapGlyphInfo(glyph_id_, + container()->image_data_offset(), + container()->GlyphStartOffset(glyph_id_), + container()->GlyphLength(glyph_id_), + container()->image_format()); + glyph_id_++; + return output.Detach(); +} + +} // namespace sfntly |