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/*
* Copyright (C) 2010, 2011 Apple 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 INC. AND ITS 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 APPLE INC. OR ITS 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 "ShareableBitmap.h"
#include <WebCore/BitmapImage.h>
#include <WebCore/GraphicsContext.h>
#include <wtf/RetainPtr.h>
#include "CGUtilities.h"
using namespace WebCore;
namespace WebKit {
static CGBitmapInfo bitmapInfo(ShareableBitmap::Flags flags)
{
CGBitmapInfo info = kCGBitmapByteOrder32Host;
if (flags & ShareableBitmap::SupportsAlpha)
info |= kCGImageAlphaPremultipliedFirst;
else
info |= kCGImageAlphaNoneSkipFirst;
return info;
}
PassOwnPtr<GraphicsContext> ShareableBitmap::createGraphicsContext()
{
RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());
ref(); // Balanced by deref in releaseBitmapContextData.
RetainPtr<CGContextRef> bitmapContext = adoptCF(CGBitmapContextCreateWithData(data(),
m_size.width(), m_size.height(), 8, m_size.width() * 4, colorSpace.get(),
bitmapInfo(m_flags), releaseBitmapContextData, this));
// We want the origin to be in the top left corner so we flip the backing store context.
CGContextTranslateCTM(bitmapContext.get(), 0, m_size.height());
CGContextScaleCTM(bitmapContext.get(), 1, -1);
return adoptPtr(new GraphicsContext(bitmapContext.get()));
}
void ShareableBitmap::paint(WebCore::GraphicsContext& context, const IntPoint& destination, const IntRect& source)
{
paintImage(context.platformContext(), makeCGImageCopy().get(), 1, destination, source);
}
void ShareableBitmap::paint(WebCore::GraphicsContext& context, float scaleFactor, const IntPoint& destination, const IntRect& source)
{
paintImage(context.platformContext(), makeCGImageCopy().get(), scaleFactor, destination, source);
}
RetainPtr<CGImageRef> ShareableBitmap::makeCGImageCopy()
{
OwnPtr<GraphicsContext> graphicsContext = createGraphicsContext();
RetainPtr<CGImageRef> image = adoptCF(CGBitmapContextCreateImage(graphicsContext->platformContext()));
return image;
}
RetainPtr<CGImageRef> ShareableBitmap::makeCGImage()
{
ref(); // Balanced by deref in releaseDataProviderData.
RetainPtr<CGDataProvider> dataProvider = adoptCF(CGDataProviderCreateWithData(this, data(), sizeInBytes(), releaseDataProviderData));
return createCGImage(dataProvider.get());
}
RetainPtr<CGImageRef> ShareableBitmap::createCGImage(CGDataProviderRef dataProvider) const
{
ASSERT_ARG(dataProvider, dataProvider);
RetainPtr<CGColorSpaceRef> colorSpace = adoptCF(CGColorSpaceCreateDeviceRGB());
RetainPtr<CGImageRef> image = adoptCF(CGImageCreate(m_size.width(), m_size.height(), 8, 32, m_size.width() * 4, colorSpace.get(), bitmapInfo(m_flags), dataProvider, 0, false, kCGRenderingIntentDefault));
return image;
}
void ShareableBitmap::releaseBitmapContextData(void* typelessBitmap, void* typelessData)
{
ShareableBitmap* bitmap = static_cast<ShareableBitmap*>(typelessBitmap);
ASSERT_UNUSED(typelessData, bitmap->data() == typelessData);
bitmap->deref(); // Balanced by ref in createGraphicsContext.
}
void ShareableBitmap::releaseDataProviderData(void* typelessBitmap, const void* typelessData, size_t)
{
ShareableBitmap* bitmap = static_cast<ShareableBitmap*>(typelessBitmap);
ASSERT_UNUSED(typelessData, bitmap->data() == typelessData);
bitmap->deref(); // Balanced by ref in createCGImage.
}
PassRefPtr<Image> ShareableBitmap::createImage()
{
RetainPtr<CGImageRef> platformImage = makeCGImage();
if (!platformImage)
return 0;
// BitmapImage::create adopts the CGImageRef that's passed in, which is why we need to leakRef here.
return BitmapImage::create(platformImage.leakRef());
}
} // namespace WebKit
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