/*

 * Copyright (C) 2009 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:

 *

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * 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.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT

 * OWNER 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.

 */

#include "config.h"

#include "WebImage.h"

#include "Image.h"

#include "ImageSource.h"

#include "SharedBuffer.h"

#include "WebData.h"

#include "WebSize.h"

#include <CoreGraphics/CGImage.h>

#include <wtf/PassRefPtr.h>

#include <wtf/RetainPtr.h>

using namespace WebCore;

namespace WebKit {

WebImage WebImage::fromData(const WebData& data, const WebSize& desiredSize)

{

    // FIXME: Do something like what WebImageSkia.cpp does to enumerate frames.

    // Not sure whether the CG decoder uses the same frame ordering rules (if so

    // we can just use the same logic).

    ImageSource source;

    source.setData(PassRefPtr<SharedBuffer>(data).get(), true);

    if (!source.isSizeAvailable())

        return WebImage();

    RetainPtr<CGImageRef> frame0(AdoptCF, source.createFrameAtIndex(0));

    if (!frame0)

        return WebImage();

    return WebImage(frame0.get());

}

void WebImage::reset()

{

    CGImageRelease(m_imageRef);

    m_imageRef = 0;

}

void WebImage::assign(const WebImage& image)

{

    assign(image.m_imageRef);

}

bool WebImage::isNull() const

{

    return !m_imageRef;

}

WebSize WebImage::size() const

{

    return WebSize(CGImageGetWidth(m_imageRef), CGImageGetHeight(m_imageRef));

}

WebImage::WebImage(const PassRefPtr<Image>& image)

    : m_imageRef(0)

{

    NativeImagePtr p;

    if (image.get() && (p = image->nativeImageForCurrentFrame()))

        assign(p);

}

WebImage& WebImage::operator=(const PassRefPtr<Image>& image)

{

    NativeImagePtr p;

    if (image.get() && (p = image->nativeImageForCurrentFrame()))

        assign(p);

    else

        reset();

    return *this;

}

void WebImage::assign(CGImageRef imageRef)

{

    // Make sure to retain the imageRef first incase m_imageRef == imageRef.

    CGImageRetain(imageRef);

    CGImageRelease(m_imageRef);

    m_imageRef = imageRef;

}

} // namespace WebKit