void GraphicsLayerUpdater::updateRecursive(RenderLayer& layer, UpdateType updateType, const UpdateContext& context, Vector<RenderLayer*>& layersNeedingPaintInvalidation)
{
if (layer.hasCompositedLayerMapping()) {
CompositedLayerMapping* mapping = layer.compositedLayerMapping();
if (updateType == ForceUpdate || mapping->needsGraphicsLayerUpdate()) {
const RenderLayer* compositingContainer = context.compositingContainer(layer);
ASSERT(compositingContainer == layer.enclosingLayerWithCompositedLayerMapping(ExcludeSelf));
if (mapping->updateGraphicsLayerConfiguration())
m_needsRebuildTree = true;
mapping->updateGraphicsLayerGeometry(compositingContainer, context.compositingStackingContext(), layersNeedingPaintInvalidation);
if (mapping->hasUnpositionedOverflowControlsLayers())
layer.scrollableArea()->positionOverflowControls(IntSize());
updateType = mapping->updateTypeForChildren(updateType);
mapping->clearNeedsGraphicsLayerUpdate();
}
}
UpdateContext childContext(context, layer);
for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
updateRecursive(*child, updateType, childContext, layersNeedingPaintInvalidation);
}
UpdateContext(const UpdateContext& other, const RenderLayer& layer)
: m_compositingStackingContext(other.m_compositingStackingContext)
, m_compositingAncestor(other.compositingContainer(layer))
{
CompositingState compositingState = layer.compositingState();
if (compositingState != NotComposited && compositingState != PaintsIntoGroupedBacking) {
m_compositingAncestor = &layer;
if (layer.stackingNode()->isStackingContext())
m_compositingStackingContext = &layer;
}
}
void GraphicsLayerUpdater::update(RenderLayer& layer, UpdateType updateType, const UpdateContext& context)
{
if (layer.hasCompositedLayerMapping()) {
CompositedLayerMappingPtr mapping = layer.compositedLayerMapping();
const RenderLayer* compositingContainer = context.compositingContainer(layer);
ASSERT(compositingContainer == layer.ancestorCompositingLayer());
if (mapping->updateRequiresOwnBackingStoreForAncestorReasons(compositingContainer))
updateType = ForceUpdate;
// Note carefully: here we assume that the compositing state of all descendants have been updated already,
// so it is legitimate to compute and cache the composited bounds for this layer.
mapping->updateCompositedBounds(updateType);
if (RenderLayerReflectionInfo* reflection = layer.reflectionInfo()) {
if (reflection->reflectionLayer()->hasCompositedLayerMapping())
reflection->reflectionLayer()->compositedLayerMapping()->updateCompositedBounds(ForceUpdate);
}
if (mapping->updateGraphicsLayerConfiguration(updateType))
m_needsRebuildTree = true;
mapping->updateGraphicsLayerGeometry(updateType, compositingContainer);
updateType = mapping->updateTypeForChildren(updateType);
mapping->clearNeedsGraphicsLayerUpdate();
if (!layer.parent())
layer.compositor()->updateRootLayerPosition();
if (mapping->hasUnpositionedOverflowControlsLayers())
layer.scrollableArea()->positionOverflowControls();
}
UpdateContext childContext(context, layer);
for (RenderLayer* child = layer.firstChild(); child; child = child->nextSibling())
update(*child, updateType, childContext);
}