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/*
* 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/tools/subsetter/subsetter.h"
#include <algorithm>
#include <iterator>
#include "sfntly/tools/subsetter/glyph_table_subsetter.h"
namespace sfntly {
Subsetter::Subsetter(Font* font, FontFactory* font_factory) {
font_ = font;
font_factory_ = font_factory;
TableSubsetterPtr subsetter = new GlyphTableSubsetter();
// TODO(arthurhsu): IMPLEMENT: CMap table subsetter
table_subsetters_.push_back(subsetter);
}
Subsetter::~Subsetter() {
font_factory_.Release();
font_.Release();
table_subsetters_.clear();
}
void Subsetter::SetGlyphs(IntegerList* glyphs) {
new_to_old_glyphs_ = *glyphs;
}
void Subsetter::SetCMaps(CMapIdList* cmap_ids, int32_t number) {
UNREFERENCED_PARAMETER(cmap_ids);
UNREFERENCED_PARAMETER(number);
// TODO(arthurhsu): IMPLEMENT
}
void Subsetter::SetRemoveTables(IntegerSet* remove_tables) {
remove_tables_ = *remove_tables;
}
CALLER_ATTACH Font::Builder* Subsetter::Subset() {
FontBuilderPtr font_builder;
font_builder.Attach(font_factory_->NewFontBuilder());
IntegerSet table_tags;
for (TableMap::const_iterator i = font_->GetTableMap()->begin(),
e = font_->GetTableMap()->end(); i != e; ++i) {
table_tags.insert(i->first);
}
if (!remove_tables_.empty()) {
IntegerSet result;
std::set_difference(table_tags.begin(), table_tags.end(),
remove_tables_.begin(), remove_tables_.end(),
std::inserter(result, result.end()));
table_tags = result;
}
for (TableSubsetterList::iterator
table_subsetter = table_subsetters_.begin(),
table_subsetter_end = table_subsetters_.end();
table_subsetter != table_subsetter_end; ++table_subsetter) {
bool handled = (*table_subsetter)->Subset(this, font_, font_builder);
if (handled) {
IntegerSet* handled_tags = (*table_subsetter)->TagsHandled();
IntegerSet result;
std::set_difference(table_tags.begin(), table_tags.end(),
handled_tags->begin(), handled_tags->end(),
std::inserter(result, result.end()));
table_tags = result;
}
}
for (IntegerSet::iterator tag = table_tags.begin(),
tag_end = table_tags.end(); tag != tag_end; ++tag) {
Table* table = font_->GetTable(*tag);
if (table) {
font_builder->NewTableBuilder(*tag, table->ReadFontData());
}
}
return font_builder.Detach();
}
IntegerList* Subsetter::GlyphPermutationTable() {
return &new_to_old_glyphs_;
}
CMapIdList* Subsetter::CMapId() {
return &cmap_ids_;
}
} // namespace sfntly
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