FloatRect RenderSVGResourceFilterPrimitive::determineFilterPrimitiveSubregion(FilterEffect* effect)
{
SVGFilter* filter = static_cast<SVGFilter*>(effect->filter());
ASSERT(filter);
// FETile, FETurbulence, FEFlood don't have input effects, take the filter region as unite rect.
FloatRect subregion;
if (unsigned numberOfInputEffects = effect->inputEffects().size()) {
subregion = determineFilterPrimitiveSubregion(effect->inputEffect(0));
for (unsigned i = 1; i < numberOfInputEffects; ++i)
subregion.unite(determineFilterPrimitiveSubregion(effect->inputEffect(i)));
} else
subregion = filter->filterRegionInUserSpace();
// After calling determineFilterPrimitiveSubregion on the target effect, reset the subregion again for <feTile>.
if (effect->filterEffectType() == FilterEffectTypeTile)
subregion = filter->filterRegionInUserSpace();
FloatRect effectBoundaries = effect->effectBoundaries();
if (effect->hasX())
subregion.setX(effectBoundaries.x());
if (effect->hasY())
subregion.setY(effectBoundaries.y());
if (effect->hasWidth())
subregion.setWidth(effectBoundaries.width());
if (effect->hasHeight())
subregion.setHeight(effectBoundaries.height());
effect->setFilterPrimitiveSubregion(subregion);
FloatRect absoluteSubregion = filter->absoluteTransform().mapRect(subregion);
FloatSize filterResolution = filter->filterResolution();
absoluteSubregion.scale(filterResolution.width(), filterResolution.height());
// Clip every filter effect to the filter region.
FloatRect absoluteScaledFilterRegion = filter->filterRegion();
absoluteScaledFilterRegion.scale(filterResolution.width(), filterResolution.height());
absoluteSubregion.intersect(absoluteScaledFilterRegion);
effect->setMaxEffectRect(absoluteSubregion);
return subregion;
}
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;
}