| /* |
| * Copyright (C) 2009, 2010 Apple Inc. All rights reserved. |
| * Copyright (C) 2014 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "core/rendering/compositing/GraphicsLayerTreeBuilder.h" |
| |
| #include "core/html/HTMLMediaElement.h" |
| #include "core/html/HTMLVideoElement.h" |
| #include "core/rendering/RenderLayer.h" |
| #include "core/rendering/RenderLayerReflectionInfo.h" |
| #include "core/rendering/RenderPart.h" |
| #include "core/rendering/RenderView.h" |
| #include "core/rendering/compositing/CompositedLayerMapping.h" |
| #include "core/rendering/compositing/RenderLayerCompositor.h" |
| |
| namespace blink { |
| |
| GraphicsLayerTreeBuilder::GraphicsLayerTreeBuilder() |
| { |
| } |
| |
| GraphicsLayerTreeBuilder::~GraphicsLayerTreeBuilder() |
| { |
| } |
| |
| static bool shouldAppendLayer(const RenderLayer& layer) |
| { |
| if (!RuntimeEnabledFeatures::overlayFullscreenVideoEnabled()) |
| return true; |
| Node* node = layer.renderer()->node(); |
| if (node && isHTMLVideoElement(*node)) { |
| HTMLVideoElement* element = toHTMLVideoElement(node); |
| // For WebRTC, video frame contains all the data and no hardware surface is used. |
| // We should always append the layer in this case. |
| if (element->isFullscreen() && !HTMLMediaElement::isMediaStreamURL(element->sourceURL().string())) |
| return false; |
| } |
| return true; |
| } |
| |
| void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info) |
| { |
| // Make the layer compositing if necessary, and set up clipping and content layers. |
| // Note that we can only do work here that is independent of whether the descendant layers |
| // have been processed. computeCompositingRequirements() will already have done the paint invalidation if necessary. |
| |
| layer.stackingNode()->updateLayerListsIfNeeded(); |
| |
| const bool hasCompositedLayerMapping = layer.hasCompositedLayerMapping(); |
| CompositedLayerMapping* currentCompositedLayerMapping = layer.compositedLayerMapping(); |
| |
| // If this layer has a compositedLayerMapping, then that is where we place subsequent children GraphicsLayers. |
| // Otherwise children continue to append to the child list of the enclosing layer. |
| GraphicsLayerVector layerChildren; |
| AncestorInfo infoForChildren(info); |
| if (hasCompositedLayerMapping) { |
| infoForChildren.childLayersOfEnclosingCompositedLayer = &layerChildren; |
| infoForChildren.enclosingCompositedLayer = &layer; |
| } |
| |
| #if ENABLE(ASSERT) |
| LayerListMutationDetector mutationChecker(layer.stackingNode()); |
| #endif |
| |
| if (layer.stackingNode()->isStackingContext()) { |
| RenderLayerStackingNodeIterator iterator(*layer.stackingNode(), NegativeZOrderChildren); |
| while (RenderLayerStackingNode* curNode = iterator.next()) |
| rebuild(*curNode->layer(), infoForChildren); |
| |
| // If a negative z-order child is compositing, we get a foreground layer which needs to get parented. |
| if (hasCompositedLayerMapping && currentCompositedLayerMapping->foregroundLayer()) |
| infoForChildren.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->foregroundLayer()); |
| } |
| |
| RenderLayerStackingNodeIterator iterator(*layer.stackingNode(), NormalFlowChildren | PositiveZOrderChildren); |
| while (RenderLayerStackingNode* curNode = iterator.next()) |
| rebuild(*curNode->layer(), infoForChildren); |
| |
| if (hasCompositedLayerMapping) { |
| bool parented = false; |
| if (layer.renderer()->isRenderPart()) |
| parented = RenderLayerCompositor::parentFrameContentLayers(toRenderPart(layer.renderer())); |
| |
| if (!parented) |
| currentCompositedLayerMapping->parentForSublayers()->setChildren(layerChildren); |
| |
| // If the layer has a clipping layer the overflow controls layers will be siblings of the clipping layer. |
| // Otherwise, the overflow control layers are normal children. |
| // FIXME: Why isn't this handled in CLM updateInternalHierarchy? |
| if (!currentCompositedLayerMapping->hasClippingLayer() && !currentCompositedLayerMapping->hasScrollingLayer()) { |
| if (GraphicsLayer* overflowControlLayer = currentCompositedLayerMapping->layerForHorizontalScrollbar()) { |
| overflowControlLayer->removeFromParent(); |
| currentCompositedLayerMapping->parentForSublayers()->addChild(overflowControlLayer); |
| } |
| |
| if (GraphicsLayer* overflowControlLayer = currentCompositedLayerMapping->layerForVerticalScrollbar()) { |
| overflowControlLayer->removeFromParent(); |
| currentCompositedLayerMapping->parentForSublayers()->addChild(overflowControlLayer); |
| } |
| |
| if (GraphicsLayer* overflowControlLayer = currentCompositedLayerMapping->layerForScrollCorner()) { |
| overflowControlLayer->removeFromParent(); |
| currentCompositedLayerMapping->parentForSublayers()->addChild(overflowControlLayer); |
| } |
| } |
| |
| if (shouldAppendLayer(layer)) |
| info.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->childForSuperlayers()); |
| } |
| |
| if (layer.scrollParent() |
| && layer.scrollParent()->hasCompositedLayerMapping() |
| && layer.scrollParent()->compositedLayerMapping()->needsToReparentOverflowControls() |
| && layer.scrollParent()->scrollableArea()->topmostScrollChild() == &layer) |
| info.childLayersOfEnclosingCompositedLayer->append(layer.scrollParent()->compositedLayerMapping()->detachLayerForOverflowControls(*info.enclosingCompositedLayer)); |
| } |
| |
| } |