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/*
* Copyright (C) 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 "CGUtilities.h"
#include <wtf/RetainPtr.h>
namespace WebKit {
void paintImage(CGContextRef context, CGImageRef image, CGFloat scaleFactor, CGPoint destination, CGRect source)
{
CGContextSaveGState(context);
CGContextClipToRect(context, CGRectMake(destination.x, destination.y, source.size.width, source.size.height));
CGContextScaleCTM(context, 1, -1);
CGFloat imageHeight = CGImageGetHeight(image) / scaleFactor;
CGFloat imageWidth = CGImageGetWidth(image) / scaleFactor;
CGFloat destX = destination.x - source.origin.x;
CGFloat destY = -imageHeight - destination.y + source.origin.y;
CGContextDrawImage(context, CGRectMake(destX, destY, imageWidth, imageHeight), image);
CGContextRestoreGState(context);
}
void paintBitmapContext(CGContextRef context, CGContextRef bitmapContext, CGFloat scaleFactor, CGPoint destination, CGRect source)
{
RetainPtr<CGImageRef> image = adoptCF(CGBitmapContextCreateImage(bitmapContext));
paintImage(context, image.get(), scaleFactor, destination, source);
}
} // namespace WebKit
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