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/*
* 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:
*
* * 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"
#if USE(ACCELERATED_COMPOSITING)
#include "ImageLayerChromium.h"
#include "cc/CCLayerImpl.h"
#include "Image.h"
#include "LayerRendererChromium.h"
#include "LayerTexture.h"
namespace WebCore {
PassRefPtr<ImageLayerChromium> ImageLayerChromium::create(GraphicsLayerChromium* owner)
{
return adoptRef(new ImageLayerChromium(owner));
}
ImageLayerChromium::ImageLayerChromium(GraphicsLayerChromium* owner)
: ContentLayerChromium(owner)
, m_imageForCurrentFrame(0)
, m_contents(0)
{
}
void ImageLayerChromium::setContents(Image* contents)
{
// setContents() currently gets called whenever there is any
// style change that affects the layer even if that change doesn't
// affect the actual contents of the image (e.g. a CSS animation).
// With this check in place we avoid unecessary texture uploads.
if ((m_contents == contents) && (m_contents->nativeImageForCurrentFrame() == m_imageForCurrentFrame))
return;
m_contents = contents;
m_imageForCurrentFrame = m_contents->nativeImageForCurrentFrame();
m_dirtyRect = IntRect(IntPoint(0, 0), bounds());
setNeedsDisplay();
}
void ImageLayerChromium::paintContentsIfDirty(const IntRect&)
{
ASSERT(layerRenderer());
if (!m_dirtyRect.isEmpty()) {
m_decodedImage.updateFromImage(m_contents->nativeImageForCurrentFrame());
updateLayerSize(m_decodedImage.size());
IntRect paintRect(IntPoint(0, 0), m_decodedImage.size());
if (!m_dirtyRect.isEmpty()) {
m_tiler->invalidateRect(paintRect);
m_dirtyRect = IntRect();
}
}
}
void ImageLayerChromium::updateCompositorResources()
{
IntRect paintRect(IntPoint(0, 0), m_decodedImage.size());
m_tiler->updateFromPixels(paintRect, paintRect, m_decodedImage.pixels());
}
IntRect ImageLayerChromium::layerBounds() const
{
return IntRect(IntPoint(0, 0), m_decodedImage.size());
}
TransformationMatrix ImageLayerChromium::tilingTransform()
{
// Tiler draws from the upper left corner. The draw transform
// specifies the middle of the layer.
TransformationMatrix transform = ccLayerImpl()->drawTransform();
const IntRect sourceRect = layerBounds();
const IntSize destSize = bounds();
transform.translate(-destSize.width() / 2.0, -destSize.height() / 2.0);
// Tiler also draws at the original content size, so rescale the original
// image dimensions to the bounds that it is meant to be drawn at.
float scaleX = destSize.width() / static_cast<float>(sourceRect.size().width());
float scaleY = destSize.height() / static_cast<float>(sourceRect.size().height());
transform.scale3d(scaleX, scaleY, 1.0f);
return transform;
}
}
#endif // USE(ACCELERATED_COMPOSITING)
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