/*

 * Copyright (c) 2008, 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 "DragImage.h"

#include "Image.h"

#include "NativeImageSkia.h"

#include "NotImplemented.h"

#include "RefPtr.h"

#include "SkBitmap.h"

#include "skia/ext/image_operations.h"

namespace WebCore {

IntSize dragImageSize(DragImageRef image)

{

    if (!image)

        return IntSize();

    return IntSize(image->width(), image->height());

}

void deleteDragImage(DragImageRef image)

{

    delete image;

}

DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)

{

    if (!image)

        return 0;

    int imageWidth = scale.width() * image->width();

    int imageHeight = scale.height() * image->height();

    DragImageRef scaledImage = new SkBitmap(

        skia::ImageOperations::Resize(*image, skia::ImageOperations::RESIZE_LANCZOS3,

                                      imageWidth, imageHeight));

    delete image;

    return scaledImage;

}

DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction)

{

    if (!image)

        return 0;

    image->setIsOpaque(false);

    image->lockPixels();

    for (int row = 0; row < image->height(); ++row) {

        for (int column = 0; column < image->width(); ++column) {

            uint32_t* pixel = image->getAddr32(column, row);

            *pixel = SkPreMultiplyARGB(SkColorGetA(*pixel) * fraction,

                                       SkColorGetR(*pixel),

                                       SkColorGetG(*pixel),

                                       SkColorGetB(*pixel));

        }

    }

    image->unlockPixels();

    return image;

}

DragImageRef createDragImageFromImage(Image* image)

{

    if (!image)

        return 0;

    NativeImageSkia* bitmap = image->nativeImageForCurrentFrame();

    if (!bitmap)

        return 0;

    SkBitmap* dragImage = new SkBitmap();

    bitmap->copyTo(dragImage, SkBitmap::kARGB_8888_Config);

    return dragImage;

}

DragImageRef createDragImageIconForCachedImage(CachedImage*)

{

    notImplemented();

    return 0;

}

} // namespace WebCore