/*
 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
 * Copyright (C) 2008-2009 Torch Mobile, Inc.
 *
 * 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. 
 */

#pragma once

#include "ImageDecoder.h"
#include <wtf/OwnPtr.h>

namespace WebCore {

class JPEGImageReader;

// This class decodes the JPEG image format.
class JPEGImageDecoder final : public ImageDecoder {
public:
	JPEGImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption);
	virtual ~JPEGImageDecoder();

	// ImageDecoder
	virtual String filenameExtension() const override { return "jpg"; }
	virtual bool isSizeAvailable() override;
	virtual bool setSize(unsigned width, unsigned height) override;
	virtual ImageFrame* frameBufferAtIndex(size_t index) override;
	// CAUTION: setFailed() deletes |m_reader|.  Be careful to avoid
	// accessing deleted memory, especially when calling this from inside
	// JPEGImageReader!
	virtual bool setFailed() override;

	bool outputScanlines();
	void jpegComplete();

	void setColorProfile(const ColorProfile& colorProfile) { m_colorProfile = colorProfile; }

	bool initializeFramebufferIfNeeded();

private:
	// 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);

	OwnPtr<JPEGImageReader> m_reader;
};

} // namespace WebCore
