/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DecodingImageGenerator_h
#define DecodingImageGenerator_h
#include "SkImageGenerator.h"
#include "SkImageInfo.h"
#include "wtf/RefPtr.h"
class SkData;
namespace WebCore {
class ImageFrameGenerator;
// Implements SkImageGenerator and used by SkPixelRef to populate a discardable
// memory with decoded pixels.
//
// This class does not own an ImageDecode. It does not own encoded data. It serves
// as and adapter to ImageFrameGenerator which actually performs decoding.
class DecodingImageGenerator FINAL : public SkImageGenerator {
public:
DecodingImageGenerator(PassRefPtr<ImageFrameGenerator>, const SkImageInfo&, size_t index);
virtual ~DecodingImageGenerator();
// SkImageGenerator implementation.
virtual SkData* refEncodedData() OVERRIDE;
virtual bool getInfo(SkImageInfo*) OVERRIDE;
virtual bool getPixels(const SkImageInfo&, void* pixels, size_t rowBytes) OVERRIDE;
void setGenerationId(size_t id) { m_generationId = id; }
private:
RefPtr<ImageFrameGenerator> m_frameGenerator;
SkImageInfo m_imageInfo;
size_t m_frameIndex;
size_t m_generationId;
};
} // namespace WebCore
#endif // DecodingImageGenerator_h_