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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.
*/
// File is originally from Chromium third_party/sfntly/src/subsetter.
// Use as test case in sfntly so that problems can be caught in upstream early.
#ifndef SFNTLY_CPP_SRC_TEST_SUBSETTER_IMPL_H_
#define SFNTLY_CPP_SRC_TEST_SUBSETTER_IMPL_H_
#include "sfntly/font.h"
#include "sfntly/font_factory.h"
#include "sfntly/table/truetype/glyph_table.h"
#include "sfntly/table/truetype/loca_table.h"
#include "sfntly/tag.h"
namespace sfntly {
// Smart pointer usage in sfntly:
//
// sfntly carries a smart pointer implementation like COM. Ref-countable object
// type inherits from RefCounted<>, which have AddRef and Release just like
// IUnknown (but no QueryInterface). Use a Ptr<> based smart pointer to hold
// the object so that the object ref count is handled correctly.
//
// class Foo : public RefCounted<Foo> {
// public:
// static Foo* CreateInstance() {
// Ptr<Foo> obj = new Foo(); // ref count = 1
// return obj.detach();
// }
// };
// typedef Ptr<Foo> FooPtr; // common short-hand notation
// FooPtr obj;
// obj.attach(Foo::CreatedInstance()); // ref count = 1
// {
// FooPtr obj2 = obj; // ref count = 2
// } // ref count = 1, obj2 out of scope
// obj.release(); // ref count = 0, object destroyed
class SubsetterImpl {
public:
SubsetterImpl();
~SubsetterImpl();
bool LoadFont(const char* font_name,
const unsigned char* original_font,
size_t font_size);
int SubsetFont(const unsigned int* glyph_ids,
size_t glyph_count,
unsigned char** output_buffer);
private:
CALLER_ATTACH Font* Subset(const IntegerSet& glyph_ids,
GlyphTable* glyf, LocaTable* loca);
FontFactoryPtr factory_;
FontPtr font_;
};
} // namespace sfntly
#endif // SFNTLY_CPP_SRC_TEST_SUBSETTER_IMPL_H_
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