130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun/* 230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * Copyright 2011 Google Inc. All Rights Reserved. 330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * 430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * Licensed under the Apache License, Version 2.0 (the "License"); 530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * you may not use this file except in compliance with the License. 630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * You may obtain a copy of the License at 730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * 830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * http://www.apache.org/licenses/LICENSE-2.0 930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * 1030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * Unless required by applicable law or agreed to in writing, software 1130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * distributed under the License is distributed on an "AS IS" BASIS, 1230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * See the License for the specific language governing permissions and 1430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * limitations under the License. 1530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun */ 1630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 1730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include "sfntly/tools/subsetter/glyph_table_subsetter.h" 1830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 1930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include "sfntly/table/truetype/glyph_table.h" 2030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include "sfntly/table/truetype/loca_table.h" 2130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include "sfntly/tag.h" 2230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include "sfntly/tools/subsetter/subsetter.h" 2330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include "sfntly/port/exception_type.h" 2430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 2530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunnamespace sfntly { 2630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 2730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunconst int32_t kGlyphTableSubsetterTags[2] = {Tag::glyf, Tag::loca}; 2830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 2930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim GurunGlyphTableSubsetter::GlyphTableSubsetter() 3030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun : TableSubsetterImpl(kGlyphTableSubsetterTags, 2) { 3130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 3230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 3330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim GurunGlyphTableSubsetter::~GlyphTableSubsetter() {} 3430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 3530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunbool GlyphTableSubsetter::Subset(Subsetter* subsetter, 3630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun Font* font, 3730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun Font::Builder* font_builder) { 3830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun assert(font); 3930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun assert(subsetter); 4030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun assert(font_builder); 4130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 4230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun IntegerList* permutation_table = subsetter->GlyphPermutationTable(); 4330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (!permutation_table || permutation_table->empty()) 4430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return false; 4530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 4630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun GlyphTablePtr glyph_table = down_cast<GlyphTable*>(font->GetTable(Tag::glyf)); 4730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun LocaTablePtr loca_table = down_cast<LocaTable*>(font->GetTable(Tag::loca)); 4830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (glyph_table == NULL || loca_table == NULL) { 4930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#if !defined (SFNTLY_NO_EXCEPTION) 5030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun throw RuntimeException("Font to subset is not valid."); 5130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#endif 5230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return false; 5330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 5430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 5530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun GlyphTableBuilderPtr glyph_table_builder = 5630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun down_cast<GlyphTable::Builder*> 5730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun (font_builder->NewTableBuilder(Tag::glyf)); 5830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun LocaTableBuilderPtr loca_table_builder = 5930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun down_cast<LocaTable::Builder*> 6030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun (font_builder->NewTableBuilder(Tag::loca)); 6130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (glyph_table_builder == NULL || loca_table_builder == NULL) { 6230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#if !defined (SFNTLY_NO_EXCEPTION) 6330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun throw RuntimeException("Builder for subset is not valid."); 6430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#endif 6530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return false; 6630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 6730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun GlyphTable::GlyphBuilderList* glyph_builders = 6830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun glyph_table_builder->GlyphBuilders(); 6930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun for (IntegerList::iterator old_glyph_id = permutation_table->begin(), 7030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun old_glyph_id_end = permutation_table->end(); 7130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun old_glyph_id != old_glyph_id_end; ++old_glyph_id) { 7230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun int old_offset = loca_table->GlyphOffset(*old_glyph_id); 7330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun int old_length = loca_table->GlyphLength(*old_glyph_id); 7430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun GlyphPtr glyph; 7530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun glyph.Attach(glyph_table->GetGlyph(old_offset, old_length)); 7630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun ReadableFontDataPtr data = glyph->ReadFontData(); 7730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun WritableFontDataPtr copy_data; 7830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun copy_data.Attach(WritableFontData::CreateWritableFontData(data->Length())); 7930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun data->CopyTo(copy_data); 8030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun GlyphBuilderPtr glyph_builder; 8130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun glyph_builder.Attach(glyph_table_builder->GlyphBuilder(copy_data)); 8230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun glyph_builders->push_back(glyph_builder); 8330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 8430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun IntegerList loca_list; 8530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun glyph_table_builder->GenerateLocaList(&loca_list); 8630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun loca_table_builder->SetLocaList(&loca_list); 8730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return true; 8830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 8930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 9030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} // namespace sfntly 91