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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 "LayerRendererChromium.h"
#if PLATFORM(SKIA)
#include "NativeImageSkia.h"
#include "PlatformContextSkia.h"
#endif
#if PLATFORM(CG)
#include <CoreGraphics/CGBitmapContext.h>
#include <CoreGraphics/CGContext.h>
#include <CoreGraphics/CGImage.h>
#include <wtf/RetainPtr.h>
#endif
namespace WebCore {
PassRefPtr<ImageLayerChromium> ImageLayerChromium::create(GraphicsLayerChromium* owner)
{
return adoptRef(new ImageLayerChromium(owner));
}
ImageLayerChromium::ImageLayerChromium(GraphicsLayerChromium* owner)
: ContentLayerChromium(owner)
, m_contents(0)
{
}
void ImageLayerChromium::setContents(NativeImagePtr contents)
{
// Check if the image has changed.
if (m_contents == contents)
return;
m_contents = contents;
setNeedsDisplay();
}
void ImageLayerChromium::updateContents()
{
ASSERT(layerRenderer());
void* pixels = 0;
IntRect dirtyRect(m_dirtyRect);
IntSize requiredTextureSize;
IntSize bitmapSize;
#if PLATFORM(SKIA)
// The layer contains an Image.
NativeImageSkia* skiaImage = static_cast<NativeImageSkia*>(m_contents);
const SkBitmap* skiaBitmap = skiaImage;
requiredTextureSize = IntSize(skiaBitmap->width(), skiaBitmap->height());
ASSERT(skiaBitmap);
SkAutoLockPixels lock(*skiaBitmap);
SkBitmap::Config skiaConfig = skiaBitmap->config();
// FIXME: do we need to support more image configurations?
if (skiaConfig == SkBitmap::kARGB_8888_Config) {
pixels = skiaBitmap->getPixels();
bitmapSize = IntSize(skiaBitmap->width(), skiaBitmap->height());
}
#elif PLATFORM(CG)
// NativeImagePtr is a CGImageRef on Mac OS X.
CGImageRef cgImage = m_contents;
int width = CGImageGetWidth(cgImage);
int height = CGImageGetHeight(cgImage);
requiredTextureSize = IntSize(width, height);
bitmapSize = requiredTextureSize;
// FIXME: we should get rid of this temporary copy where possible.
int tempRowBytes = width * 4;
Vector<uint8_t> tempVector;
tempVector.resize(height * tempRowBytes);
// Note we do not zero this vector since we are going to
// completely overwrite its contents with the image below.
// Try to reuse the color space from the image to preserve its colors.
// Some images use a color space (such as indexed) unsupported by the bitmap context.
RetainPtr<CGColorSpaceRef> colorSpaceReleaser;
CGColorSpaceRef colorSpace = CGImageGetColorSpace(cgImage);
CGColorSpaceModel colorSpaceModel = CGColorSpaceGetModel(colorSpace);
switch (colorSpaceModel) {
case kCGColorSpaceModelMonochrome:
case kCGColorSpaceModelRGB:
case kCGColorSpaceModelCMYK:
case kCGColorSpaceModelLab:
case kCGColorSpaceModelDeviceN:
break;
default:
colorSpaceReleaser.adoptCF(CGColorSpaceCreateDeviceRGB());
colorSpace = colorSpaceReleaser.get();
break;
}
RetainPtr<CGContextRef> tempContext(AdoptCF, CGBitmapContextCreate(tempVector.data(),
width, height, 8, tempRowBytes,
colorSpace,
kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(tempContext.get(), kCGBlendModeCopy);
CGContextDrawImage(tempContext.get(),
CGRectMake(0, 0, static_cast<CGFloat>(width), static_cast<CGFloat>(height)),
cgImage);
pixels = tempVector.data();
#else
#error "Need to implement for your platform."
#endif
// FIXME: Remove this test when tiled layers are implemented.
m_skipsDraw = false;
if (!layerRenderer()->checkTextureSize(requiredTextureSize)) {
m_skipsDraw = true;
return;
}
unsigned textureId = m_contentsTexture;
if (!textureId)
textureId = layerRenderer()->createLayerTexture();
if (pixels)
updateTextureRect(pixels, bitmapSize, requiredTextureSize, dirtyRect, textureId);
}
}
#endif // USE(ACCELERATED_COMPOSITING)
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