void CompositingInputsUpdater::updateRecursive(DeprecatedPaintLayer* layer, UpdateType updateType, AncestorInfo info)
{
if (!layer->childNeedsCompositingInputsUpdate() && updateType != ForceUpdate)
return;
m_geometryMap.pushMappingsToAncestor(layer, layer->parent());
if (layer->hasCompositedDeprecatedPaintLayerMapping())
info.enclosingCompositedLayer = layer;
if (layer->needsCompositingInputsUpdate()) {
if (info.enclosingCompositedLayer)
info.enclosingCompositedLayer->compositedDeprecatedPaintLayerMapping()->setNeedsGraphicsLayerUpdate(GraphicsLayerUpdateSubtree);
updateType = ForceUpdate;
}
if (updateType == ForceUpdate) {
DeprecatedPaintLayer::AncestorDependentCompositingInputs properties;
if (!layer->isRootLayer()) {
properties.clippedAbsoluteBoundingBox = enclosingIntRect(m_geometryMap.absoluteRect(layer->boundingBoxForCompositingOverlapTest()));
// FIXME: Setting the absBounds to 1x1 instead of 0x0 makes very little sense,
// but removing this code will make JSGameBench sad.
// See https://codereview.chromium.org/13912020/
if (properties.clippedAbsoluteBoundingBox.isEmpty())
properties.clippedAbsoluteBoundingBox.setSize(IntSize(1, 1));
IntRect clipRect = pixelSnappedIntRect(layer->clipper().backgroundClipRect(ClipRectsContext(m_rootLayer, AbsoluteClipRects)).rect());
properties.clippedAbsoluteBoundingBox.intersect(clipRect);
const DeprecatedPaintLayer* parent = layer->parent();
properties.opacityAncestor = parent->isTransparent() ? parent : parent->opacityAncestor();
properties.transformAncestor = parent->hasTransformRelatedProperty() ? parent : parent->transformAncestor();
properties.filterAncestor = parent->hasFilter() ? parent : parent->filterAncestor();
bool layerIsFixedPosition = layer->layoutObject()->style()->position() == FixedPosition;
properties.nearestFixedPositionLayer = layerIsFixedPosition ? layer : parent->nearestFixedPositionLayer();
if (info.hasAncestorWithClipOrOverflowClip) {
const DeprecatedPaintLayer* parentLayerOnClippingContainerChain = findParentLayerOnClippingContainerChain(layer);
const bool parentHasClipOrOverflowClip = parentLayerOnClippingContainerChain->layoutObject()->hasClipOrOverflowClip();
properties.clippingContainer = parentHasClipOrOverflowClip ? parentLayerOnClippingContainerChain->layoutObject() : parentLayerOnClippingContainerChain->clippingContainer();
}
if (info.lastScrollingAncestor) {
const LayoutObject* containingBlock = layer->layoutObject()->containingBlock();
const DeprecatedPaintLayer* parentLayerOnContainingBlockChain = findParentLayerOnContainingBlockChain(containingBlock);
properties.ancestorScrollingLayer = parentLayerOnContainingBlockChain->ancestorScrollingLayer();
if (parentLayerOnContainingBlockChain->scrollsOverflow())
properties.ancestorScrollingLayer = parentLayerOnContainingBlockChain;
if (layer->layoutObject()->isOutOfFlowPositioned() && !layer->subtreeIsInvisible()) {
const DeprecatedPaintLayer* clippingLayer = properties.clippingContainer ? properties.clippingContainer->enclosingLayer() : layer->compositor()->rootLayer();
if (hasClippedStackingAncestor(layer, clippingLayer))
properties.clipParent = clippingLayer;
}
if (layer->stackingNode()->isTreatedAsStackingContextForPainting()
&& properties.ancestorScrollingLayer
&& !info.ancestorStackingContext->layoutObject()->isDescendantOf(properties.ancestorScrollingLayer->layoutObject()))
properties.scrollParent = properties.ancestorScrollingLayer;
}
}
properties.hasAncestorWithClipPath = info.hasAncestorWithClipPath;
layer->updateAncestorDependentCompositingInputs(properties);
}
if (layer->stackingNode()->isStackingContext())
info.ancestorStackingContext = layer;
if (layer->scrollsOverflow())
info.lastScrollingAncestor = layer;
if (layer->layoutObject()->hasClipOrOverflowClip())
info.hasAncestorWithClipOrOverflowClip = true;
if (layer->layoutObject()->hasClipPath())
info.hasAncestorWithClipPath = true;
DeprecatedPaintLayer::DescendantDependentCompositingInputs descendantProperties;
for (DeprecatedPaintLayer* child = layer->firstChild(); child; child = child->nextSibling()) {
updateRecursive(child, updateType, info);
descendantProperties.hasDescendantWithClipPath |= child->hasDescendantWithClipPath() || child->layoutObject()->hasClipPath();
descendantProperties.hasNonIsolatedDescendantWithBlendMode |= (!child->stackingNode()->isStackingContext() && child->hasNonIsolatedDescendantWithBlendMode()) || child->layoutObject()->style()->hasBlendMode();
}
layer->updateDescendantDependentCompositingInputs(descendantProperties);
layer->didUpdateCompositingInputs();
m_geometryMap.popMappingsToAncestor(layer->parent());
}
