diff options
Diffstat (limited to 'sfntly/table/bitmap/eblc_table.cc')
| -rw-r--r-- | sfntly/table/bitmap/eblc_table.cc | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/sfntly/table/bitmap/eblc_table.cc b/sfntly/table/bitmap/eblc_table.cc new file mode 100644 index 0000000..0ad2764 --- /dev/null +++ b/sfntly/table/bitmap/eblc_table.cc @@ -0,0 +1,313 @@ +/* + * 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/eblc_table.h" + +#include <stdio.h> +#include <stdlib.h> + +#include "sfntly/math/font_math.h" + +namespace sfntly { +/****************************************************************************** + * EblcTable class + ******************************************************************************/ +int32_t EblcTable::Version() { + return data_->ReadFixed(Offset::kVersion); +} + +int32_t EblcTable::NumSizes() { + return data_->ReadULongAsInt(Offset::kNumSizes); +} + +BitmapSizeTable* EblcTable::GetBitmapSizeTable(int32_t index) { + if (index < 0 || index > NumSizes()) { +#if !defined (SFNTLY_NO_EXCEPTION) + throw IndexOutOfBoundException( + "Size table index is outside the range of tables."); +#endif + return NULL; + } + BitmapSizeTableList* bitmap_size_table_list = GetBitmapSizeTableList(); + if (bitmap_size_table_list) { + return (*bitmap_size_table_list)[index]; + } + return NULL; +} + +EblcTable::EblcTable(Header* header, ReadableFontData* data) + : SubTableContainerTable(header, data) { +} + +BitmapSizeTableList* EblcTable::GetBitmapSizeTableList() { + AutoLock lock(bitmap_size_table_lock_); + if (bitmap_size_table_.empty()) { + CreateBitmapSizeTable(data_, NumSizes(), &bitmap_size_table_); + } + return &bitmap_size_table_; +} + +// static +void EblcTable::CreateBitmapSizeTable(ReadableFontData* data, + int32_t num_sizes, + BitmapSizeTableList* output) { + assert(data); + assert(output); + for (int32_t i = 0; i < num_sizes; ++i) { + ReadableFontDataPtr new_data; + new_data.Attach(down_cast<ReadableFontData*>( + data->Slice(Offset::kBitmapSizeTableArrayStart + + i * Offset::kBitmapSizeTableLength, + Offset::kBitmapSizeTableLength))); + BitmapSizeTableBuilderPtr size_builder; + size_builder.Attach( + BitmapSizeTable::Builder::CreateBuilder(new_data, data)); + BitmapSizeTablePtr size; + size.Attach(down_cast<BitmapSizeTable*>(size_builder->Build())); + output->push_back(size); + } +} + +/****************************************************************************** + * EblcTable::Builder class + ******************************************************************************/ +EblcTable::Builder::Builder(Header* header, WritableFontData* data) + : SubTableContainerTable::Builder(header, data) { +} + +EblcTable::Builder::Builder(Header* header, ReadableFontData* data) + : SubTableContainerTable::Builder(header, data) { +} + +EblcTable::Builder::~Builder() { +} + +int32_t EblcTable::Builder::SubSerialize(WritableFontData* new_data) { + // header + int32_t size = new_data->WriteFixed(0, kVersion); + size += new_data->WriteULong(size, size_table_builders_.size()); + + // calculate the offsets + // offset to the start of the size table array + int32_t size_table_start_offset = size; + // walking offset in the size table array + int32_t size_table_offset = size_table_start_offset; + // offset to the start of the whole index subtable block + int32_t sub_table_block_start_offset = size_table_offset + + size_table_builders_.size() * Offset::kBitmapSizeTableLength; + // walking offset in the index subtable + // points to the start of the current subtable block + int32_t current_sub_table_block_start_offset = sub_table_block_start_offset; + +#if defined (SFNTLY_DEBUG_BITMAP) + int32_t size_index = 0; +#endif + for (BitmapSizeTableBuilderList::iterator + size_builder = size_table_builders_.begin(), + size_builder_end = size_table_builders_.end(); + size_builder != size_builder_end; size_builder++) { + (*size_builder)->SetIndexSubTableArrayOffset( + current_sub_table_block_start_offset); + IndexSubTableBuilderList* index_sub_table_builder_list = + (*size_builder)->IndexSubTableBuilders(); + + // walking offset within the current subTable array + int32_t index_sub_table_array_offset = current_sub_table_block_start_offset; + // walking offset within the subTable entries + int32_t index_sub_table_offset = index_sub_table_array_offset + + index_sub_table_builder_list->size() * Offset::kIndexSubHeaderLength; + +#if defined (SFNTLY_DEBUG_BITMAP) + fprintf(stderr, "size %d: sizeTable=%x, current subTable Block=%x, ", + size_index, size_table_offset, + current_sub_table_block_start_offset); + fprintf(stderr, "index subTableStart=%x\n", index_sub_table_offset); + size_index++; + int32_t sub_table_index = 0; +#endif + for (IndexSubTableBuilderList::iterator + index_sub_table_builder = index_sub_table_builder_list->begin(), + index_sub_table_builder_end = index_sub_table_builder_list->end(); + index_sub_table_builder != index_sub_table_builder_end; + index_sub_table_builder++) { +#if defined (SFNTLY_DEBUG_BITMAP) + fprintf(stderr, "\tsubTableIndex %d: format=%x, ", sub_table_index, + (*index_sub_table_builder)->index_format()); + fprintf(stderr, "indexSubTableArrayOffset=%x, indexSubTableOffset=%x\n", + index_sub_table_array_offset, index_sub_table_offset); + sub_table_index++; +#endif + // array entry + index_sub_table_array_offset += new_data->WriteUShort( + index_sub_table_array_offset, + (*index_sub_table_builder)->first_glyph_index()); + index_sub_table_array_offset += new_data->WriteUShort( + index_sub_table_array_offset, + (*index_sub_table_builder)->last_glyph_index()); + index_sub_table_array_offset += new_data->WriteULong( + index_sub_table_array_offset, + index_sub_table_offset - current_sub_table_block_start_offset); + + // index sub table + WritableFontDataPtr slice_index_sub_table; + slice_index_sub_table.Attach(down_cast<WritableFontData*>( + new_data->Slice(index_sub_table_offset))); + int32_t current_sub_table_size = + (*index_sub_table_builder)->SubSerialize(slice_index_sub_table); + int32_t padding = FontMath::PaddingRequired(current_sub_table_size, + DataSize::kULONG); +#if defined (SFNTLY_DEBUG_BITMAP) + fprintf(stderr, "\t\tsubTableSize = %x, padding = %x\n", + current_sub_table_size, padding); +#endif + index_sub_table_offset += current_sub_table_size; + index_sub_table_offset += + new_data->WritePadding(index_sub_table_offset, padding); + } + + // serialize size table + (*size_builder)->SetIndexTableSize( + index_sub_table_offset - current_sub_table_block_start_offset); + WritableFontDataPtr slice_size_table; + slice_size_table.Attach(down_cast<WritableFontData*>( + new_data->Slice(size_table_offset))); + size_table_offset += (*size_builder)->SubSerialize(slice_size_table); + + current_sub_table_block_start_offset = index_sub_table_offset; + } + return size + current_sub_table_block_start_offset; +} + +bool EblcTable::Builder::SubReadyToSerialize() { + if (size_table_builders_.empty()) { + return false; + } + for (BitmapSizeTableBuilderList::iterator b = size_table_builders_.begin(), + e = size_table_builders_.end(); + b != e; b++) { + if (!(*b)->SubReadyToSerialize()) { + return false; + } + } + return true; +} + +int32_t EblcTable::Builder::SubDataSizeToSerialize() { + if (size_table_builders_.empty()) { + return 0; + } + int32_t size = Offset::kHeaderLength; + bool variable = false; +#if defined (SFNTLY_DEBUG_BITMAP) + size_t size_index = 0; +#endif + for (BitmapSizeTableBuilderList::iterator b = size_table_builders_.begin(), + e = size_table_builders_.end(); + b != e; b++) { + int32_t size_builder_size = (*b)->SubDataSizeToSerialize(); +#if defined (SFNTLY_DEBUG_BITMAP) + fprintf(stderr, "sizeIndex = %d, sizeBuilderSize=0x%x (%d)\n", + size_index++, size_builder_size, size_builder_size); +#endif + variable = size_builder_size > 0 ? variable : true; + size += abs(size_builder_size); + } +#if defined (SFNTLY_DEBUG_BITMAP) + fprintf(stderr, "eblc size=%d\n", size); +#endif + return variable ? -size : size; +} + +void EblcTable::Builder::SubDataSet() { + Revert(); +} + +BitmapSizeTableBuilderList* EblcTable::Builder::BitmapSizeBuilders() { + return GetSizeList(); +} + +void EblcTable::Builder::Revert() { + size_table_builders_.clear(); + set_model_changed(false); +} + +void EblcTable::Builder::GenerateLocaList(BitmapLocaList* output) { + assert(output); + BitmapSizeTableBuilderList* size_builder_list = GetSizeList(); + output->clear(); +#if defined (SFNTLY_DEBUG_BITMAP) + int32_t size_index = 0; +#endif + for (BitmapSizeTableBuilderList::iterator b = size_builder_list->begin(), + e = size_builder_list->end(); + b != e; b++) { +#if defined (SFNTLY_DEBUG_BITMAP) + fprintf(stderr, "size table = %d\n", size_index++); +#endif + BitmapGlyphInfoMap loca_map; + (*b)->GenerateLocaMap(&loca_map); + output->push_back(loca_map); + } +} + +CALLER_ATTACH +FontDataTable* EblcTable::Builder::SubBuildTable(ReadableFontData* data) { + Ptr<EblcTable> new_table = new EblcTable(header(), data); + return new_table.Detach(); +} + +// static +CALLER_ATTACH EblcTable::Builder* + EblcTable::Builder::CreateBuilder(Header* header, WritableFontData* data) { + Ptr<EblcTable::Builder> new_builder = new EblcTable::Builder(header, data); + return new_builder.Detach(); +} + +// static +CALLER_ATTACH EblcTable::Builder* + EblcTable::Builder::CreateBuilder(Header* header, ReadableFontData* data) { + Ptr<EblcTable::Builder> new_builder = new EblcTable::Builder(header, data); + return new_builder.Detach(); +} + +BitmapSizeTableBuilderList* EblcTable::Builder::GetSizeList() { + if (size_table_builders_.empty()) { + Initialize(InternalReadData(), &size_table_builders_); + set_model_changed(); + } + return &size_table_builders_; +} + +void EblcTable::Builder::Initialize(ReadableFontData* data, + BitmapSizeTableBuilderList* output) { + assert(output); + if (data) { + int32_t num_sizes = data->ReadULongAsInt(Offset::kNumSizes); + for (int32_t i = 0; i < num_sizes; ++i) { + ReadableFontDataPtr new_data; + new_data.Attach(down_cast<ReadableFontData*>( + data->Slice(Offset::kBitmapSizeTableArrayStart + + i * Offset::kBitmapSizeTableLength, + Offset::kBitmapSizeTableLength))); + BitmapSizeTableBuilderPtr size_builder; + size_builder.Attach(BitmapSizeTable::Builder::CreateBuilder( + new_data, data)); + output->push_back(size_builder); + } + } +} + +} // namespace sfntly |