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/*
* Copyright (C) 2016 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. ``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
* 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 "NativeImage.h"
#if USE(CAIRO)
#include "CairoUtilities.h"
#include "PlatformContextCairo.h"
#include <cairo.h>
namespace WebCore {
IntSize nativeImageSize(const NativeImagePtr& image)
{
return image ? cairoSurfaceSize(image.get()) : IntSize();
}
bool nativeImageHasAlpha(const NativeImagePtr& image)
{
return !image || cairo_surface_get_content(image.get()) != CAIRO_CONTENT_COLOR;
}
Color nativeImageSinglePixelSolidColor(const NativeImagePtr& image)
{
if (!image || nativeImageSize(image) != IntSize(1, 1))
return Color();
if (cairo_surface_get_type(image.get()) != CAIRO_SURFACE_TYPE_IMAGE)
return Color();
RGBA32* pixel = reinterpret_cast_ptr<RGBA32*>(cairo_image_surface_get_data(image.get()));
return colorFromPremultipliedARGB(*pixel);
}
float subsamplingScale(GraphicsContext&, const FloatRect&, const FloatRect&)
{
return 1;
}
void drawNativeImage(const NativeImagePtr& image, GraphicsContext& context, const FloatRect& destRect, const FloatRect& srcRect, const IntSize&, CompositeOperator op, BlendMode mode, const ImageOrientation& orientation)
{
context.save();
// Set the compositing operation.
if (op == CompositeSourceOver && mode == BlendModeNormal && !nativeImageHasAlpha(image))
context.setCompositeOperation(CompositeCopy);
else
context.setCompositeOperation(op, mode);
#if ENABLE(IMAGE_DECODER_DOWN_SAMPLING)
IntSize scaledSize = nativeImageSize(image);
FloatRect adjustedSrcRect = adjustSourceRectForDownSampling(srcRect, scaledSize);
#else
FloatRect adjustedSrcRect(srcRect);
#endif
FloatRect adjustedDestRect = destRect;
if (orientation != DefaultImageOrientation) {
// ImageOrientation expects the origin to be at (0, 0).
context.translate(destRect.x(), destRect.y());
adjustedDestRect.setLocation(FloatPoint());
context.concatCTM(orientation.transformFromDefault(adjustedDestRect.size()));
if (orientation.usesWidthAsHeight()) {
// The destination rectangle will have it's width and height already reversed for the orientation of
// the image, as it was needed for page layout, so we need to reverse it back here.
adjustedDestRect.setSize(adjustedDestRect.size().transposedSize());
}
}
context.platformContext()->drawSurfaceToContext(image.get(), adjustedDestRect, adjustedSrcRect, context);
context.restore();
}
void clearNativeImageSubimages(const NativeImagePtr&)
{
}
} // namespace WebCore
#endif // USE(CAIRO)
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