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 #include "sfntly/tools/subsetter/subsetter.h" 18 19 #include <algorithm> 20 #include <iterator> 21 22 #include "sfntly/tools/subsetter/glyph_table_subsetter.h" 23 24 namespace sfntly { 25 26 Subsetter::Subsetter(Font* font, FontFactory* font_factory) { 27 font_ = font; 28 font_factory_ = font_factory; 29 TableSubsetterPtr subsetter = new GlyphTableSubsetter(); 30 // TODO(arthurhsu): IMPLEMENT: CMap table subsetter 31 table_subsetters_.push_back(subsetter); 32 } 33 34 Subsetter::~Subsetter() { 35 font_factory_.Release(); 36 font_.Release(); 37 table_subsetters_.clear(); 38 } 39 40 void Subsetter::SetGlyphs(IntegerList* glyphs) { 41 new_to_old_glyphs_ = *glyphs; 42 } 43 44 void Subsetter::SetCMaps(CMapIdList* cmap_ids, int32_t number) { 45 UNREFERENCED_PARAMETER(cmap_ids); 46 UNREFERENCED_PARAMETER(number); 47 // TODO(arthurhsu): IMPLEMENT 48 } 49 50 void Subsetter::SetRemoveTables(IntegerSet* remove_tables) { 51 remove_tables_ = *remove_tables; 52 } 53 54 CALLER_ATTACH Font::Builder* Subsetter::Subset() { 55 FontBuilderPtr font_builder; 56 font_builder.Attach(font_factory_->NewFontBuilder()); 57 58 IntegerSet table_tags; 59 for (TableMap::const_iterator i = font_->GetTableMap()->begin(), 60 e = font_->GetTableMap()->end(); i != e; ++i) { 61 table_tags.insert(i->first); 62 } 63 if (!remove_tables_.empty()) { 64 IntegerSet result; 65 std::set_difference(table_tags.begin(), table_tags.end(), 66 remove_tables_.begin(), remove_tables_.end(), 67 std::inserter(result, result.end())); 68 table_tags = result; 69 } 70 for (TableSubsetterList::iterator 71 table_subsetter = table_subsetters_.begin(), 72 table_subsetter_end = table_subsetters_.end(); 73 table_subsetter != table_subsetter_end; ++table_subsetter) { 74 bool handled = (*table_subsetter)->Subset(this, font_, font_builder); 75 if (handled) { 76 IntegerSet* handled_tags = (*table_subsetter)->TagsHandled(); 77 IntegerSet result; 78 std::set_difference(table_tags.begin(), table_tags.end(), 79 handled_tags->begin(), handled_tags->end(), 80 std::inserter(result, result.end())); 81 table_tags = result; 82 } 83 } 84 for (IntegerSet::iterator tag = table_tags.begin(), 85 tag_end = table_tags.end(); tag != tag_end; ++tag) { 86 Table* table = font_->GetTable(*tag); 87 if (table) { 88 font_builder->NewTableBuilder(*tag, table->ReadFontData()); 89 } 90 } 91 return font_builder.Detach(); 92 } 93 94 IntegerList* Subsetter::GlyphPermutationTable() { 95 return &new_to_old_glyphs_; 96 } 97 98 CMapIdList* Subsetter::CMapId() { 99 return &cmap_ids_; 100 } 101 102 } // namespace sfntly 103
