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/*
* Copyright (C) 2006 Apple Computer, 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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 JPEGImageDecoder_h
#define JPEGImageDecoder_h
#include "platform/image-decoders/ImageDecoder.h"
#include <memory>
namespace blink {
class JPEGImageReader;
class PLATFORM_EXPORT JPEGImageDecoder final : public ImageDecoder {
WTF_MAKE_NONCOPYABLE(JPEGImageDecoder);
public:
JPEGImageDecoder(AlphaOption, const ColorBehavior&, size_t maxDecodedBytes);
~JPEGImageDecoder() override;
// ImageDecoder:
String filenameExtension() const override { return "jpg"; }
void onSetData(SegmentReader* data) override;
IntSize decodedSize() const override { return m_decodedSize; }
bool setSize(unsigned width, unsigned height) override;
IntSize decodedYUVSize(int component) const override;
size_t decodedYUVWidthBytes(int component) const override;
bool canDecodeToYUV() override;
bool decodeToYUV() override;
void setImagePlanes(std::unique_ptr<ImagePlanes>) override;
bool hasImagePlanes() const { return m_imagePlanes.get(); }
bool outputScanlines();
unsigned desiredScaleNumerator() const;
void complete();
void setOrientation(ImageOrientation orientation) {
m_orientation = orientation;
}
void setDecodedSize(unsigned width, unsigned height);
private:
// ImageDecoder:
void decodeSize() override { decode(true); }
void decode(size_t) override { decode(false); }
// Decodes the image. If |onlySize| is true, stops decoding after
// calculating the image size. If decoding fails but there is no more
// data coming, sets the "decode failure" flag.
void decode(bool onlySize);
std::unique_ptr<JPEGImageReader> m_reader;
std::unique_ptr<ImagePlanes> m_imagePlanes;
IntSize m_decodedSize;
};
} // namespace blink
#endif
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