Source/WebCore/platform/graphics/chromium/DeferredImageDecoder.h

/*
 * Copyright (C) 2012 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 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 DeferredImageDecoder_h
#define DeferredImageDecoder_h

#include "ImageDecoder.h"
#include "ImageSource.h"
#include "IntSize.h"
#include "SkBitmap.h"

namespace WebCore {

class SharedBuffer;

class DeferredImageDecoder {
public:
    ~DeferredImageDecoder();
    static DeferredImageDecoder* create(const SharedBuffer& data, ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption);

    static PassOwnPtr<DeferredImageDecoder> createForTesting(PassOwnPtr<ImageDecoder>);

    String filenameExtension() const;

    ImageFrame* frameBufferAtIndex(size_t index);

    void setData(SharedBuffer* data, bool allDataReceived);

    bool isSizeAvailable();
    IntSize size() const;
    IntSize frameSizeAtIndex(size_t index) const;
    size_t frameCount();
    int repetitionCount() const;
    void clearFrameBufferCache(size_t);
    bool frameHasAlphaAtIndex(size_t index) const;
    unsigned frameBytesAtIndex(size_t index) const;
    ImageOrientation orientation() const;

private:
    explicit DeferredImageDecoder(ImageDecoder* actualDecoder);

    RefPtr<SharedBuffer> m_data;
    bool m_allDataReceived;
    OwnPtr<ImageDecoder> m_actualDecoder;

    String m_filenameExtension;
    IntSize m_size;
    ImageOrientation m_orientation;

    ImageFrame m_lazyDecodedFrame;
};

} // namespace WebCore

#endif