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/*
* Copyright (C) 2010 Apple Inc. All rights reserved.
* Copyright (C) 2010 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.
*/
#include "config.h"
#if USE(3D_GRAPHICS)
#include "GraphicsContext3D.h"
#include "BitmapImage.h"
#include "Image.h"
#include "ImageDecoder.h"
#include "NativeImageSkia.h"
#include "SkColorPriv.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <algorithm>
namespace WebCore {
bool GraphicsContext3D::getImageData(Image* image,
GC3Denum format,
GC3Denum type,
bool premultiplyAlpha,
bool ignoreGammaAndColorProfile,
Vector<uint8_t>& outputVector)
{
if (!image)
return false;
OwnPtr<NativeImageSkia> pixels;
NativeImageSkia* skiaImage = image->nativeImageForCurrentFrame();
AlphaOp neededAlphaOp = AlphaDoNothing;
bool hasAlpha = skiaImage ? !skiaImage->bitmap().isOpaque() : true;
if ((!skiaImage || ignoreGammaAndColorProfile || (hasAlpha && !premultiplyAlpha)) && image->data()) {
// Attempt to get raw unpremultiplied image data.
OwnPtr<ImageDecoder> decoder(adoptPtr(ImageDecoder::create(
*(image->data()), ImageSource::AlphaNotPremultiplied,
ignoreGammaAndColorProfile ? ImageSource::GammaAndColorProfileIgnored : ImageSource::GammaAndColorProfileApplied)));
if (!decoder)
return false;
decoder->setData(image->data(), true);
if (!decoder->frameCount())
return false;
ImageFrame* frame = decoder->frameBufferAtIndex(0);
if (!frame || frame->status() != ImageFrame::FrameComplete)
return false;
hasAlpha = frame->hasAlpha();
pixels = adoptPtr(frame->asNewNativeImage());
if (!pixels.get() || !pixels->isDataComplete() || !pixels->bitmap().width() || !pixels->bitmap().height())
return false;
SkBitmap::Config skiaConfig = pixels->bitmap().config();
if (skiaConfig != SkBitmap::kARGB_8888_Config)
return false;
skiaImage = pixels.get();
if (hasAlpha && premultiplyAlpha)
neededAlphaOp = AlphaDoPremultiply;
} else if (!premultiplyAlpha && hasAlpha)
neededAlphaOp = AlphaDoUnmultiply;
if (!skiaImage)
return false;
const SkBitmap& skiaImageRef = skiaImage->bitmap();
SkAutoLockPixels lock(skiaImageRef);
ASSERT(skiaImageRef.rowBytes() == skiaImageRef.width() * 4);
unsigned int packedSize;
// Output data is tightly packed (alignment == 1).
if (computeImageSizeInBytes(format, type, skiaImageRef.width(), skiaImageRef.height(), 1, &packedSize, 0) != GraphicsContext3D::NO_ERROR)
return false;
outputVector.resize(packedSize);
return packPixels(reinterpret_cast<const uint8_t*>(skiaImageRef.getPixels()),
SK_B32_SHIFT ? SourceFormatRGBA8 : SourceFormatBGRA8,
skiaImageRef.width(), skiaImageRef.height(), 0,
format, type, neededAlphaOp, outputVector.data());
}
} // namespace WebCore
#endif // USE(3D_GRAPHICS)
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