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/*
* Copyright (C) 2010 University of Szeged
* Copyright (C) 2010 Zoltan Herczeg
*
* 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 UNIVERSITY OF SZEGED ``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 UNIVERSITY OF SZEGED 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 ENABLE(SVG) && ENABLE(FILTERS)
#include "RenderSVGResourceFilterPrimitive.h"
#include "RenderSVGResource.h"
#include "SVGFEImage.h"
#include "SVGFilter.h"
namespace WebCore {
FloatRect RenderSVGResourceFilterPrimitive::determineFilterPrimitiveSubregion(FilterEffect* effect)
{
FloatRect uniteRect;
FloatRect subregionBoundingBox = effect->effectBoundaries();
FloatRect subregion = subregionBoundingBox;
SVGFilter* filter = static_cast<SVGFilter*>(effect->filter());
ASSERT(filter);
if (effect->filterEffectType() != FilterEffectTypeTile) {
// FETurbulence, FEImage and FEFlood don't have input effects, take the filter region as unite rect.
if (unsigned numberOfInputEffects = effect->inputEffects().size()) {
for (unsigned i = 0; i < numberOfInputEffects; ++i)
uniteRect.unite(determineFilterPrimitiveSubregion(effect->inputEffect(i)));
} else
uniteRect = filter->filterRegionInUserSpace();
} else {
determineFilterPrimitiveSubregion(effect->inputEffect(0));
uniteRect = filter->filterRegionInUserSpace();
}
if (filter->effectBoundingBoxMode()) {
subregion = uniteRect;
// Avoid the calling of a virtual method several times.
FloatRect targetBoundingBox = filter->targetBoundingBox();
if (effect->hasX())
subregion.setX(targetBoundingBox.x() + subregionBoundingBox.x() * targetBoundingBox.width());
if (effect->hasY())
subregion.setY(targetBoundingBox.y() + subregionBoundingBox.y() * targetBoundingBox.height());
if (effect->hasWidth())
subregion.setWidth(subregionBoundingBox.width() * targetBoundingBox.width());
if (effect->hasHeight())
subregion.setHeight(subregionBoundingBox.height() * targetBoundingBox.height());
} else {
if (!effect->hasX())
subregion.setX(uniteRect.x());
if (!effect->hasY())
subregion.setY(uniteRect.y());
if (!effect->hasWidth())
subregion.setWidth(uniteRect.width());
if (!effect->hasHeight())
subregion.setHeight(uniteRect.height());
}
effect->setFilterPrimitiveSubregion(subregion);
FloatRect absoluteSubregion = filter->mapLocalRectToAbsoluteRect(subregion);
FloatSize filterResolution = filter->filterResolution();
absoluteSubregion.scale(filterResolution.width(), filterResolution.height());
// FEImage needs the unclipped subregion in absolute coordinates to determine the correct
// destination rect in combination with preserveAspectRatio.
if (effect->filterEffectType() == FilterEffectTypeImage)
static_cast<FEImage*>(effect)->setAbsoluteSubregion(absoluteSubregion);
// Clip every filter effect to the filter region.
FloatRect absoluteScaledFilterRegion = filter->filterRegion();
absoluteScaledFilterRegion.scale(filterResolution.width(), filterResolution.height());
absoluteSubregion.intersect(absoluteScaledFilterRegion);
effect->setMaxEffectRect(enclosingIntRect(absoluteSubregion));
return subregion;
}
} // namespace WebCore
#endif // ENABLE(SVG) && ENABLE(FILTERS)
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