FloatRect SourceAlpha::determineAbsolutePaintRect(const FloatRect& requestedRect)
{
FloatRect srcRect = filter()->sourceImageRect();
srcRect.intersect(requestedRect);
addAbsolutePaintRect(srcRect);
return srcRect;
}
FloatRect FilterEffect::determineAbsolutePaintRect(const FloatRect& originalRequestedRect)
{
FloatRect requestedRect = originalRequestedRect;
// Filters in SVG clip to primitive subregion, while CSS doesn't.
if (m_clipsToBounds)
requestedRect.intersect(maxEffectRect());
// We may be called multiple times if result is used more than once. Return
// quickly if if nothing new is required.
if (absolutePaintRect().contains(enclosingIntRect(requestedRect)))
return requestedRect;
FloatRect inputRect = mapPaintRect(requestedRect, false);
FloatRect inputUnion;
unsigned size = m_inputEffects.size();
for (unsigned i = 0; i < size; ++i)
inputUnion.unite(m_inputEffects.at(i)->determineAbsolutePaintRect(inputRect));
inputUnion = mapPaintRect(inputUnion, true);
if (affectsTransparentPixels() || !size) {
inputUnion = requestedRect;
} else {
// Rect may have inflated. Re-intersect with request.
inputUnion.intersect(requestedRect);
}
addAbsolutePaintRect(inputUnion);
return inputUnion;
}
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;
}
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;
}
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;
}
FloatRect SourceGraphic::determineAbsolutePaintRect(const FloatRect& requestedRect)
{
FloatRect srcRect = intersection(m_sourceRect, requestedRect);
addAbsolutePaintRect(srcRect);
return srcRect;
}
