void FEDropShadow::determineAbsolutePaintRect()
{
Filter* filter = this->filter();
ASSERT(filter);
FloatRect absolutePaintRect = inputEffect(0)->absolutePaintRect();
FloatRect absoluteOffsetPaintRect(absolutePaintRect);
absoluteOffsetPaintRect.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy));
absolutePaintRect.unite(absoluteOffsetPaintRect);
unsigned kernelSizeX = 0;
unsigned kernelSizeY = 0;
FEGaussianBlur::calculateKernelSize(filter, kernelSizeX, kernelSizeY, m_stdX, m_stdY);
// We take the half kernel size and multiply it with three, because we run box blur three times.
absolutePaintRect.inflateX(3 * kernelSizeX * 0.5f);
absolutePaintRect.inflateY(3 * kernelSizeY * 0.5f);
if (clipsToBounds())
absolutePaintRect.intersect(maxEffectRect());
else
absolutePaintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
}
FloatRect FilterEffect::applyBounds(const FloatRect& rect) const {
// Filters in SVG clip to primitive subregion, while CSS doesn't.
if (!clipsToBounds())
return rect;
FloatRect bounds = absoluteBounds();
if (affectsTransparentPixels())
return bounds;
return intersection(rect, bounds);
}
FloatRect FEComposite::determineAbsolutePaintRect(const FloatRect& originalRequestedRect)
{
FloatRect requestedRect = originalRequestedRect;
if (clipsToBounds())
requestedRect.intersect(maxEffectRect());
// We may be called multiple times if result is used more than once. Return
// quickly if nothing new is required.
if (absolutePaintRect().contains(enclosingIntRect(requestedRect)))
return requestedRect;
// No mapPaintRect required for FEComposite.
FloatRect input1Rect = inputEffect(1)->determineAbsolutePaintRect(requestedRect);
FloatRect affectedRect;
switch (m_type) {
case FECOMPOSITE_OPERATOR_IN:
// 'in' has output only in the intersection of both inputs.
affectedRect = intersection(input1Rect, inputEffect(0)->determineAbsolutePaintRect(input1Rect));
break;
case FECOMPOSITE_OPERATOR_ATOP:
// 'atop' has output only in the extents of the second input.
// Make sure first input knows where it needs to produce output.
inputEffect(0)->determineAbsolutePaintRect(input1Rect);
affectedRect = input1Rect;
break;
case FECOMPOSITE_OPERATOR_ARITHMETIC:
if (k4() > 0) {
// Make sure first input knows where it needs to produce output.
inputEffect(0)->determineAbsolutePaintRect(requestedRect);
// Arithmetic with non-zero k4 may influnce the complete filter primitive
// region. So we can't optimize the paint region here.
affectedRect = requestedRect;
break;
}
if (k2() <= 0) {
// Input 0 does not appear where input 1 is not present.
FloatRect input0Rect = inputEffect(0)->determineAbsolutePaintRect(input1Rect);
if (k3() > 0) {
affectedRect = input1Rect;
} else {
// Just k1 is positive. Use intersection.
affectedRect = intersection(input1Rect, input0Rect);
}
break;
}
// else fall through to use union
default:
// Take the union of both input effects.
affectedRect = unionRect(input1Rect, inputEffect(0)->determineAbsolutePaintRect(requestedRect));
break;
}
affectedRect.intersect(requestedRect);
addAbsolutePaintRect(affectedRect);
return affectedRect;
}
FloatRect FEGaussianBlur::determineAbsolutePaintRect(const FloatRect& originalRequestedRect)
{
FloatRect requestedRect = originalRequestedRect;
if (clipsToBounds())
requestedRect.intersect(maxEffectRect());
FilterEffect* input = inputEffect(0);
FloatRect inputRect = input->determineAbsolutePaintRect(mapRect(requestedRect, false));
FloatRect outputRect = mapRect(inputRect, true);
outputRect.intersect(requestedRect);
addAbsolutePaintRect(outputRect);
// Blur needs space for both input and output pixels in the paint area.
// Input is also clipped to subregion.
if (clipsToBounds())
inputRect.intersect(maxEffectRect());
addAbsolutePaintRect(inputRect);
return outputRect;
}
void FEOffset::determineAbsolutePaintRect()
{
FloatRect paintRect = inputEffect(0)->absolutePaintRect();
Filter& filter = this->filter();
paintRect.move(filter.applyHorizontalScale(m_dx), filter.applyVerticalScale(m_dy));
if (clipsToBounds())
paintRect.intersect(maxEffectRect());
else
paintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(paintRect));
}
FloatRect FilterEffect::mapInputs(const FloatRect& rect) const {
if (!m_inputEffects.size()) {
if (clipsToBounds())
return absoluteBounds();
return rect;
}
FloatRect inputUnion;
for (const auto& effect : m_inputEffects)
inputUnion.unite(effect->mapRect(rect));
return inputUnion;
}
void FEMorphology::determineAbsolutePaintRect()
{
FloatRect paintRect = inputEffect(0)->absolutePaintRect();
Filter& filter = this->filter();
paintRect.inflateX(filter.applyHorizontalScale(m_radiusX));
paintRect.inflateY(filter.applyVerticalScale(m_radiusY));
if (clipsToBounds())
paintRect.intersect(maxEffectRect());
else
paintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(paintRect));
}
void FEDropShadow::determineAbsolutePaintRect()
{
Filter* filter = this->filter();
ASSERT(filter);
FloatRect absolutePaintRect = mapRect(inputEffect(0)->absolutePaintRect());
if (clipsToBounds())
absolutePaintRect.intersect(maxEffectRect());
else
absolutePaintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
}
void FEImage::determineAbsolutePaintRect()
{
FloatRect paintRect = filter().absoluteTransform().mapRect(filterPrimitiveSubregion());
FloatRect srcRect;
if (m_image) {
srcRect.setSize(m_image->size());
m_preserveAspectRatio.transformRect(paintRect, srcRect);
} else if (RenderElement* renderer = referencedRenderer())
srcRect = filter().absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates());
if (clipsToBounds())
paintRect.intersect(maxEffectRect());
else
paintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(paintRect));
}
void FEGaussianBlur::determineAbsolutePaintRect()
{
FloatRect absolutePaintRect = inputEffect(0)->absolutePaintRect();
if (clipsToBounds())
absolutePaintRect.intersect(maxEffectRect());
else
absolutePaintRect.unite(maxEffectRect());
unsigned kernelSizeX = 0;
unsigned kernelSizeY = 0;
calculateKernelSize(filter(), kernelSizeX, kernelSizeY, m_stdX, m_stdY);
// We take the half kernel size and multiply it with three, because we run box blur three times.
absolutePaintRect.inflateX(3 * kernelSizeX * 0.5f);
absolutePaintRect.inflateY(3 * kernelSizeY * 0.5f);
setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
}
FloatRect FEDisplacementMap::determineAbsolutePaintRect(const FloatRect& requestedRect)
{
FloatRect rect = requestedRect;
if (clipsToBounds())
rect.intersect(maxEffectRect());
if (absolutePaintRect().contains(enclosingIntRect(rect)))
return rect;
rect = mapPaintRect(rect, false);
rect = inputEffect(0)->determineAbsolutePaintRect(rect);
rect = mapPaintRect(rect, true);
rect.intersect(requestedRect);
addAbsolutePaintRect(rect);
return rect;
}
void FEGaussianBlur::determineAbsolutePaintRect()
{
IntSize kernelSize = calculateKernelSize(filter(), FloatPoint(m_stdX, m_stdY));
FloatRect absolutePaintRect = inputEffect(0)->absolutePaintRect();
// Edge modes other than 'none' do not inflate the affected paint rect.
if (m_edgeMode != EDGEMODE_NONE) {
setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
return;
}
// We take the half kernel size and multiply it with three, because we run box blur three times.
absolutePaintRect.inflateX(3 * kernelSize.width() * 0.5f);
absolutePaintRect.inflateY(3 * kernelSize.height() * 0.5f);
if (clipsToBounds())
absolutePaintRect.intersect(maxEffectRect());
else
absolutePaintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
}
void FEDropShadow::determineAbsolutePaintRect()
{
Filter& filter = this->filter();
FloatRect absolutePaintRect = inputEffect(0)->absolutePaintRect();
FloatRect absoluteOffsetPaintRect(absolutePaintRect);
absoluteOffsetPaintRect.move(filter.applyHorizontalScale(m_dx), filter.applyVerticalScale(m_dy));
absolutePaintRect.unite(absoluteOffsetPaintRect);
IntSize kernelSize = FEGaussianBlur::calculateKernelSize(filter, FloatPoint(m_stdX, m_stdY));
// We take the half kernel size and multiply it with three, because we run box blur three times.
absolutePaintRect.inflateX(3 * kernelSize.width() * 0.5f);
absolutePaintRect.inflateY(3 * kernelSize.height() * 0.5f);
if (clipsToBounds())
absolutePaintRect.intersect(maxEffectRect());
else
absolutePaintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
}
FloatRect FEImage::determineAbsolutePaintRect(const FloatRect& originalRequestedRect)
{
RenderObject* renderer = referencedRenderer();
if (!m_image && !renderer)
return FloatRect();
FloatRect requestedRect = originalRequestedRect;
if (clipsToBounds())
requestedRect.intersect(maxEffectRect());
FloatRect destRect = filter()->mapLocalRectToAbsoluteRect(filterPrimitiveSubregion());
FloatRect srcRect;
if (renderer) {
srcRect = getRendererRepaintRect(renderer);
SVGElement* contextNode = toSVGElement(renderer->node());
if (contextNode->hasRelativeLengths()) {
// FIXME: This fixes relative lengths but breaks non-relative ones (see crbug/260709).
SVGLengthContext lengthContext(contextNode);
FloatSize viewportSize;
if (lengthContext.determineViewport(viewportSize)) {
srcRect = makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), destRect).mapRect(srcRect);
}
} else {
srcRect = filter()->mapLocalRectToAbsoluteRect(srcRect);
srcRect.move(destRect.x(), destRect.y());
}
destRect.intersect(srcRect);
} else {
srcRect = FloatRect(FloatPoint(), m_image->size());
m_preserveAspectRatio->transformRect(destRect, srcRect);
}
destRect.intersect(requestedRect);
addAbsolutePaintRect(destRect);
return destRect;
}
