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/*
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#if ENABLE(SVG) && ENABLE(FILTERS)
#include "SVGFilter.h"
namespace WebCore {
SVGFilter::SVGFilter(const FloatRect& targetBoundingBox, const FloatRect& filterRect, bool effectBBoxMode)
: Filter()
, m_targetBoundingBox(targetBoundingBox)
, m_filterRect(filterRect)
, m_effectBBoxMode(effectBBoxMode)
{
}
void SVGFilter::determineFilterPrimitiveSubregion(FilterEffect* effect, const FloatRect& unionOfPreviousPrimitiveSubregions)
{
FloatRect subRegionBBox = effect->effectBoundaries();
FloatRect newSubRegion = subRegionBBox;
if (m_effectBBoxMode) {
newSubRegion = unionOfPreviousPrimitiveSubregions;
if (effect->hasX())
newSubRegion.setX(m_targetBoundingBox.x() + subRegionBBox.x() * m_targetBoundingBox.width());
if (effect->hasY())
newSubRegion.setY(m_targetBoundingBox.y() + subRegionBBox.y() * m_targetBoundingBox.height());
if (effect->hasWidth())
newSubRegion.setWidth(subRegionBBox.width() * m_targetBoundingBox.width());
if (effect->hasHeight())
newSubRegion.setHeight(subRegionBBox.height() * m_targetBoundingBox.height());
} else {
if (!effect->hasX())
newSubRegion.setX(unionOfPreviousPrimitiveSubregions.x());
if (!effect->hasY())
newSubRegion.setY(unionOfPreviousPrimitiveSubregions.y());
if (!effect->hasWidth())
newSubRegion.setWidth(unionOfPreviousPrimitiveSubregions.width());
if (!effect->hasHeight())
newSubRegion.setHeight(unionOfPreviousPrimitiveSubregions.height());
}
// clip every filter effect to the filter region
newSubRegion.intersect(m_filterRect);
effect->setFilterPrimitiveSubregion(newSubRegion);
// TODO: Everything above should be moved to a first phase of layout in RenderSVGResourceFilterPrimitive.
// The scaling of the subregion to the repaint rect should be merged with a more intelligent repaint logic
// and moved to the second phase of layout in RenderSVGResourceFilterPrimitive.
// See bug https://bugs.webkit.org/show_bug.cgi?id=45614.
newSubRegion.scale(filterResolution().width(), filterResolution().height());
effect->setRepaintRectInLocalCoordinates(newSubRegion);
m_maxImageSize = m_maxImageSize.expandedTo(newSubRegion.size());
}
PassRefPtr<SVGFilter> SVGFilter::create(const FloatRect& targetBoundingBox, const FloatRect& filterRect, bool effectBBoxMode)
{
return adoptRef(new SVGFilter(targetBoundingBox, filterRect, effectBBoxMode));
}
} // namespace WebCore
#endif // ENABLE(SVG) && ENABLE(FILTERS)
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