bool RenderSVGResourceClipper::applyClippingToContext(RenderObject* target, const FloatRect& targetBoundingBox,
const FloatRect& repaintRect, GraphicsContext* context, ClipperContext& clipperContext)
{
ASSERT(target);
ASSERT(context);
ASSERT(clipperContext.state == ClipperContext::NotAppliedState);
ASSERT_WITH_SECURITY_IMPLICATION(!needsLayout());
if (repaintRect.isEmpty() || m_inClipExpansion)
return false;
TemporaryChange<bool> inClipExpansionChange(m_inClipExpansion, true);
// First, try to apply the clip as a clipPath.
AffineTransform animatedLocalTransform = toSVGClipPathElement(element())->animatedLocalTransform();
if (tryPathOnlyClipping(context, animatedLocalTransform, targetBoundingBox)) {
clipperContext.state = ClipperContext::AppliedPathState;
return true;
}
// Fall back to masking.
clipperContext.state = ClipperContext::AppliedMaskState;
// Mask layer start
context->beginTransparencyLayer(1, &repaintRect);
{
GraphicsContextStateSaver maskContentSaver(*context);
context->concatCTM(animatedLocalTransform);
// clipPath can also be clipped by another clipPath.
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
RenderSVGResourceClipper* clipPathClipper = 0;
ClipperContext clipPathClipperContext;
if (resources && (clipPathClipper = resources->clipper())) {
if (!clipPathClipper->applyClippingToContext(this, targetBoundingBox, repaintRect, context, clipPathClipperContext)) {
// FIXME: Awkward state micro-management. Ideally, GraphicsContextStateSaver should
// a) pop saveLayers also
// b) pop multiple states if needed (similarly to SkCanvas::restoreToCount())
// Then we should be able to replace this mess with a single, top-level GCSS.
maskContentSaver.restore();
context->restoreLayer();
return false;
}
}
drawClipMaskContent(context, targetBoundingBox);
if (clipPathClipper)
clipPathClipper->postApplyStatefulResource(this, context, clipPathClipperContext);
}
// Masked content layer start.
context->beginLayer(1, CompositeSourceIn, &repaintRect);
return true;
}
bool RenderSVGResourceClipper::applyClippingToContext(RenderObject* object, const FloatRect& objectBoundingBox,
const FloatRect& repaintRect, GraphicsContext* context)
{
bool missingClipperData = !m_clipper.contains(object);
if (missingClipperData)
m_clipper.set(object, new ClipperData);
bool shouldCreateClipData = false;
AffineTransform animatedLocalTransform = static_cast<SVGClipPathElement*>(node())->animatedLocalTransform();
ClipperData* clipperData = m_clipper.get(object);
if (!clipperData->clipMaskImage) {
if (pathOnlyClipping(context, animatedLocalTransform, objectBoundingBox))
return true;
shouldCreateClipData = true;
}
AffineTransform absoluteTransform;
SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(object, absoluteTransform);
if (shouldCreateClipData && !repaintRect.isEmpty()) {
if (!SVGRenderingContext::createImageBuffer(repaintRect, absoluteTransform, clipperData->clipMaskImage, ColorSpaceDeviceRGB, Unaccelerated))
return false;
GraphicsContext* maskContext = clipperData->clipMaskImage->context();
ASSERT(maskContext);
maskContext->concatCTM(animatedLocalTransform);
// clipPath can also be clipped by another clipPath.
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
RenderSVGResourceClipper* clipper;
bool succeeded;
if (resources && (clipper = resources->clipper())) {
GraphicsContextStateSaver stateSaver(*maskContext);
if (!clipper->applyClippingToContext(this, objectBoundingBox, repaintRect, maskContext))
return false;
succeeded = drawContentIntoMaskImage(clipperData, objectBoundingBox);
// The context restore applies the clipping on non-CG platforms.
} else
succeeded = drawContentIntoMaskImage(clipperData, objectBoundingBox);
if (!succeeded)
clipperData->clipMaskImage.clear();
}
if (!clipperData->clipMaskImage)
return false;
SVGRenderingContext::clipToImageBuffer(context, absoluteTransform, repaintRect, clipperData->clipMaskImage, missingClipperData);
return true;
}
bool RenderSVGResourceClipper::applyClippingToContext(RenderElement& renderer, const FloatRect& objectBoundingBox, const FloatRect& repaintRect, GraphicsContext& context)
{
ClipperMaskImage& clipperMaskImage = addRendererToClipper(renderer);
bool shouldCreateClipperMaskImage = !clipperMaskImage;
AffineTransform animatedLocalTransform = clipPathElement().animatedLocalTransform();
if (shouldCreateClipperMaskImage && pathOnlyClipping(context, animatedLocalTransform, objectBoundingBox))
return true;
AffineTransform absoluteTransform = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(renderer);
if (shouldCreateClipperMaskImage && !repaintRect.isEmpty()) {
// FIXME (149469): This image buffer should not be unconditionally unaccelerated. Making it match the context breaks nested clipping, though.
clipperMaskImage = SVGRenderingContext::createImageBuffer(repaintRect, absoluteTransform, ColorSpaceSRGB, Unaccelerated);
if (!clipperMaskImage)
return false;
GraphicsContext& maskContext = clipperMaskImage->context();
maskContext.concatCTM(animatedLocalTransform);
// clipPath can also be clipped by another clipPath.
auto* resources = SVGResourcesCache::cachedResourcesForRenderer(*this);
RenderSVGResourceClipper* clipper;
bool succeeded;
if (resources && (clipper = resources->clipper())) {
GraphicsContextStateSaver stateSaver(maskContext);
if (!clipper->applyClippingToContext(*this, objectBoundingBox, repaintRect, maskContext))
return false;
succeeded = drawContentIntoMaskImage(clipperMaskImage, objectBoundingBox);
// The context restore applies the clipping on non-CG platforms.
} else
succeeded = drawContentIntoMaskImage(clipperMaskImage, objectBoundingBox);
if (!succeeded)
clipperMaskImage.reset();
}
if (!clipperMaskImage)
return false;
SVGRenderingContext::clipToImageBuffer(context, absoluteTransform, repaintRect, clipperMaskImage, shouldCreateClipperMaskImage);
return true;
}
bool RenderSVGResourceClipper::applyClippingToContext(RenderObject* target, const FloatRect& targetBoundingBox,
const FloatRect& paintInvalidationRect, GraphicsContext* context, ClipperState& clipperState)
{
ASSERT(target);
ASSERT(context);
ASSERT(clipperState == ClipperNotApplied);
ASSERT_WITH_SECURITY_IMPLICATION(!needsLayout());
if (paintInvalidationRect.isEmpty() || m_inClipExpansion)
return false;
TemporaryChange<bool> inClipExpansionChange(m_inClipExpansion, true);
AffineTransform animatedLocalTransform = toSVGClipPathElement(element())->animatedLocalTransform();
// When drawing a clip for non-SVG elements, the CTM does not include the zoom factor.
// In this case, we need to apply the zoom scale explicitly - but only for clips with
// userSpaceOnUse units (the zoom is accounted for objectBoundingBox-resolved lengths).
if (!target->isSVG() && clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE) {
ASSERT(style());
animatedLocalTransform.scale(style()->effectiveZoom());
}
// First, try to apply the clip as a clipPath.
if (tryPathOnlyClipping(context, animatedLocalTransform, targetBoundingBox)) {
clipperState = ClipperAppliedPath;
return true;
}
// Fall back to masking.
clipperState = ClipperAppliedMask;
// Mask layer start
context->beginTransparencyLayer(1, &paintInvalidationRect);
{
GraphicsContextStateSaver maskContentSaver(*context);
context->concatCTM(animatedLocalTransform);
// clipPath can also be clipped by another clipPath.
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
RenderSVGResourceClipper* clipPathClipper = resources ? resources->clipper() : 0;
ClipperState clipPathClipperState = ClipperNotApplied;
if (clipPathClipper && !clipPathClipper->applyClippingToContext(this, targetBoundingBox, paintInvalidationRect, context, clipPathClipperState)) {
// FIXME: Awkward state micro-management. Ideally, GraphicsContextStateSaver should
// a) pop saveLayers also
// b) pop multiple states if needed (similarly to SkCanvas::restoreToCount())
// Then we should be able to replace this mess with a single, top-level GCSS.
maskContentSaver.restore();
context->restoreLayer();
return false;
}
drawClipMaskContent(context, targetBoundingBox);
if (clipPathClipper)
clipPathClipper->postApplyStatefulResource(this, context, clipPathClipperState);
}
// Masked content layer start.
context->beginLayer(1, CompositeSourceIn, &paintInvalidationRect);
return true;
}
