bool SVGClipPainter::prepareEffect(const LayoutObject& target, const FloatRect& targetBoundingBox,
const FloatRect& paintInvalidationRect, GraphicsContext& context, ClipperState& clipperState)
{
ASSERT(clipperState == ClipperNotApplied);
ASSERT_WITH_SECURITY_IMPLICATION(!m_clip.needsLayout());
m_clip.clearInvalidationMask();
if (paintInvalidationRect.isEmpty() || m_clip.hasCycle())
return false;
SVGClipExpansionCycleHelper inClipExpansionChange(m_clip);
AffineTransform animatedLocalTransform = toSVGClipPathElement(m_clip.element())->calculateAnimatedLocalTransform();
// 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() && m_clip.clipPathUnits() == SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE) {
ASSERT(m_clip.style());
animatedLocalTransform.scale(m_clip.style()->effectiveZoom());
}
// First, try to apply the clip as a clipPath.
Path clipPath;
if (m_clip.asPath(animatedLocalTransform, targetBoundingBox, clipPath)) {
clipperState = ClipperAppliedPath;
context.getPaintController().createAndAppend<BeginClipPathDisplayItem>(target, clipPath);
return true;
}
// Fall back to masking.
clipperState = ClipperAppliedMask;
// Begin compositing the clip mask.
CompositingRecorder::beginCompositing(context, target, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect);
{
if (!drawClipAsMask(context, target, targetBoundingBox, paintInvalidationRect, animatedLocalTransform)) {
// End the clip mask's compositor.
CompositingRecorder::endCompositing(context, target);
return false;
}
}
// Masked content layer start.
CompositingRecorder::beginCompositing(context, target, SkXfermode::kSrcIn_Mode, 1, &paintInvalidationRect);
return true;
}
bool SVGClipPainter::prepareEffect(const LayoutObject& target,
const FloatRect& targetBoundingBox,
const FloatRect& visualRect,
const FloatPoint& layerPositionOffset,
GraphicsContext& context,
ClipperState& clipperState) {
DCHECK_EQ(clipperState, ClipperState::NotApplied);
SECURITY_DCHECK(!m_clip.needsLayout());
m_clip.clearInvalidationMask();
if (m_clip.hasCycle())
return false;
SVGClipExpansionCycleHelper inClipExpansionChange(m_clip);
AffineTransform animatedLocalTransform =
toSVGClipPathElement(m_clip.element())
->calculateTransform(SVGElement::IncludeMotionTransform);
// 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() &&
m_clip.clipPathUnits() == SVGUnitTypes::kSvgUnitTypeUserspaceonuse) {
DCHECK(m_clip.style());
animatedLocalTransform.scale(m_clip.style()->effectiveZoom());
}
// First, try to apply the clip as a clipPath.
Path clipPath;
if (m_clip.asPath(animatedLocalTransform, targetBoundingBox, clipPath)) {
AffineTransform positionTransform;
positionTransform.translate(layerPositionOffset.x(),
layerPositionOffset.y());
clipPath.transform(positionTransform);
clipperState = ClipperState::AppliedPath;
context.getPaintController().createAndAppend<BeginClipPathDisplayItem>(
target, clipPath);
return true;
}
// Fall back to masking.
clipperState = ClipperState::AppliedMask;
// Begin compositing the clip mask.
CompositingRecorder::beginCompositing(context, target, SkBlendMode::kSrcOver,
1, &visualRect);
{
if (!drawClipAsMask(context, target, targetBoundingBox, visualRect,
animatedLocalTransform, layerPositionOffset)) {
// End the clip mask's compositor.
CompositingRecorder::endCompositing(context, target);
return false;
}
}
// Masked content layer start.
CompositingRecorder::beginCompositing(context, target, SkBlendMode::kSrcIn, 1,
&visualRect);
return true;
}
