468 lines
21 KiB
C++
468 lines
21 KiB
C++
/*
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* Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "FloatPoint.h"
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#include "FloatPoint3D.h"
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#include "GraphicsLayer.h"
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#include "GraphicsLayerClient.h"
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#include "RenderLayer.h"
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#include "RenderLayerCompositor.h"
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#include "ScrollingCoordinator.h"
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namespace WebCore {
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class EventRegionContext;
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class KeyframeList;
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class PaintedContentsInfo;
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class RenderLayerCompositor;
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class TiledBacking;
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class TransformationMatrix;
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#if CPU(ADDRESS64) && PLATFORM(COCOA)
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#define USE_OWNING_LAYER_BEAR_TRAP 1
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#define BEAR_TRAP_VALUE 0xEEEEEEEEEEEEEEEE
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#else
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#define USE_OWNING_LAYER_BEAR_TRAP 0
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#endif
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enum CompositingLayerType {
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NormalCompositingLayer, // non-tiled layer with backing store
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TiledCompositingLayer, // tiled layer (always has backing store)
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MediaCompositingLayer, // layer that contains an image, video, WebGL or plugin
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ContainerCompositingLayer // layer with no backing store
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};
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// RenderLayerBacking controls the compositing behavior for a single RenderLayer.
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// It holds the various GraphicsLayers, and makes decisions about intra-layer rendering
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// optimizations.
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//
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// There is one RenderLayerBacking for each RenderLayer that is composited.
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class RenderLayerBacking final : public GraphicsLayerClient {
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WTF_MAKE_NONCOPYABLE(RenderLayerBacking); WTF_MAKE_FAST_ALLOCATED;
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public:
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explicit RenderLayerBacking(RenderLayer&);
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~RenderLayerBacking();
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#if PLATFORM(IOS_FAMILY)
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void layerWillBeDestroyed();
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#endif
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// Do cleanup while layer->backing() is still valid.
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void willBeDestroyed();
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RenderLayer& owningLayer() const { return m_owningLayer; }
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// Included layers are non-z-order descendant layers that are painted into this backing.
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const Vector<WeakPtr<RenderLayer>>& backingSharingLayers() const { return m_backingSharingLayers; }
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void setBackingSharingLayers(Vector<WeakPtr<RenderLayer>>&&);
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bool hasBackingSharingLayers() const { return !m_backingSharingLayers.isEmpty(); }
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void removeBackingSharingLayer(RenderLayer&);
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void clearBackingSharingLayers();
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void updateConfigurationAfterStyleChange();
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// Returns true if layer configuration changed.
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bool updateConfiguration(const RenderLayer* compositingAncestor);
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// Update graphics layer position and bounds.
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void updateGeometry(const RenderLayer* compositingAncestor);
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// Update state the requires that descendant layers have been updated.
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void updateAfterDescendants();
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// Update contents and clipping structure.
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void updateDrawsContent();
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void updateAfterLayout(bool needsClippingUpdate, bool needsFullRepaint);
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GraphicsLayer* graphicsLayer() const { return m_graphicsLayer.get(); }
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// Layer to clip children
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bool hasClippingLayer() const { return (m_childContainmentLayer && !m_isFrameLayerWithTiledBacking); }
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GraphicsLayer* clippingLayer() const { return !m_isFrameLayerWithTiledBacking ? m_childContainmentLayer.get() : nullptr; }
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bool hasAncestorClippingLayers() const { return !!m_ancestorClippingStack; }
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LayerAncestorClippingStack* ancestorClippingStack() const { return m_ancestorClippingStack.get(); }
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bool updateAncestorClippingStack(Vector<CompositedClipData>&&);
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void ensureOverflowControlsHostLayerAncestorClippingStack(const RenderLayer* compositedAncestor);
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LayerAncestorClippingStack* overflowControlsHostLayerAncestorClippingStack() const { return m_overflowControlsHostLayerAncestorClippingStack.get(); }
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GraphicsLayer* contentsContainmentLayer() const { return m_contentsContainmentLayer.get(); }
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GraphicsLayer* foregroundLayer() const { return m_foregroundLayer.get(); }
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GraphicsLayer* backgroundLayer() const { return m_backgroundLayer.get(); }
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bool backgroundLayerPaintsFixedRootBackground() const { return m_backgroundLayerPaintsFixedRootBackground; }
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bool needsRepaintOnCompositedScroll() const;
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bool requiresBackgroundLayer() const { return m_requiresBackgroundLayer; }
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void setRequiresBackgroundLayer(bool);
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bool hasScrollingLayer() const { return m_scrollContainerLayer != nullptr; }
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GraphicsLayer* scrollContainerLayer() const { return m_scrollContainerLayer.get(); }
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GraphicsLayer* scrolledContentsLayer() const { return m_scrolledContentsLayer.get(); }
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void detachFromScrollingCoordinator(OptionSet<ScrollCoordinationRole>);
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ScrollingNodeID scrollingNodeIDForRole(ScrollCoordinationRole role) const
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{
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switch (role) {
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case ScrollCoordinationRole::Scrolling:
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return m_scrollingNodeID;
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case ScrollCoordinationRole::ScrollingProxy:
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// These nodeIDs are stored in m_ancestorClippingStack.
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ASSERT_NOT_REACHED();
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return 0;
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case ScrollCoordinationRole::FrameHosting:
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return m_frameHostingNodeID;
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case ScrollCoordinationRole::ViewportConstrained:
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return m_viewportConstrainedNodeID;
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case ScrollCoordinationRole::Positioning:
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return m_positioningNodeID;
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}
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return 0;
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}
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void setScrollingNodeIDForRole(ScrollingNodeID, ScrollCoordinationRole);
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ScrollingNodeID scrollingNodeIDForChildren() const;
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bool hasMaskLayer() const { return m_maskLayer; }
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bool hasChildClippingMaskLayer() const { return m_childClippingMaskLayer != nullptr; }
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GraphicsLayer* parentForSublayers() const;
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GraphicsLayer* childForSuperlayers() const;
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// RenderLayers with backing normally short-circuit paintLayer() because
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// their content is rendered via callbacks from GraphicsLayer. However, the document
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// layer is special, because it has a GraphicsLayer to act as a container for the GraphicsLayers
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// for descendants, but its contents usually render into the window (in which case this returns true).
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// This returns false for other layers, and when the document layer actually needs to paint into its backing store
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// for some reason.
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bool paintsIntoWindow() const;
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// Returns true for a composited layer that has no backing store of its own, so
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// paints into some ancestor layer.
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bool paintsIntoCompositedAncestor() const { return !m_requiresOwnBackingStore; }
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void setRequiresOwnBackingStore(bool);
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void setContentsNeedDisplay(GraphicsLayer::ShouldClipToLayer = GraphicsLayer::ClipToLayer);
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// r is in the coordinate space of the layer's render object
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void setContentsNeedDisplayInRect(const LayoutRect&, GraphicsLayer::ShouldClipToLayer = GraphicsLayer::ClipToLayer);
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// Notification from the renderer that its content changed.
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void contentChanged(ContentChangeType);
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// Interface to start, finish, suspend and resume animations
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bool startAnimation(double timeOffset, const Animation&, const KeyframeList&);
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void animationPaused(double timeOffset, const String& name);
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void animationFinished(const String& name);
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void transformRelatedPropertyDidChange();
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void suspendAnimations(MonotonicTime = MonotonicTime());
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void resumeAnimations();
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LayoutRect compositedBounds() const;
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// Returns true if changed.
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bool setCompositedBounds(const LayoutRect&);
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// Returns true if changed.
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bool updateCompositedBounds();
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void updateAllowsBackingStoreDetaching(const LayoutRect& absoluteBounds);
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#if ENABLE(ASYNC_SCROLLING)
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bool maintainsEventRegion() const;
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void updateEventRegion();
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bool needsEventRegionUpdate() const { return m_needsEventRegionUpdate; }
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void setNeedsEventRegionUpdate(bool needsUpdate = true) { m_needsEventRegionUpdate = needsUpdate; }
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#endif
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void updateAfterWidgetResize();
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void positionOverflowControlsLayers();
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bool isFrameLayerWithTiledBacking() const { return m_isFrameLayerWithTiledBacking; }
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WEBCORE_EXPORT TiledBacking* tiledBacking() const;
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void adjustTiledBackingCoverage();
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void setTiledBackingHasMargins(bool hasExtendedBackgroundOnLeftAndRight, bool hasExtendedBackgroundOnTopAndBottom);
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void updateDebugIndicators(bool showBorder, bool showRepaintCounter);
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bool paintsSubpixelAntialiasedText() const { return m_paintsSubpixelAntialiasedText; }
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// GraphicsLayerClient interface
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void tiledBackingUsageChanged(const GraphicsLayer*, bool /*usingTiledBacking*/) override;
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void notifyAnimationStarted(const GraphicsLayer*, const String& animationKey, MonotonicTime startTime) override;
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void notifyFlushRequired(const GraphicsLayer*) override;
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void notifyFlushBeforeDisplayRefresh(const GraphicsLayer*) override;
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void paintContents(const GraphicsLayer*, GraphicsContext&, const FloatRect& clip, GraphicsLayerPaintBehavior) override;
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float deviceScaleFactor() const override;
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float contentsScaleMultiplierForNewTiles(const GraphicsLayer*) const override;
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bool paintsOpaquelyAtNonIntegralScales(const GraphicsLayer*) const override;
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float pageScaleFactor() const override;
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float zoomedOutPageScaleFactor() const override;
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void didChangePlatformLayerForLayer(const GraphicsLayer*) override;
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bool getCurrentTransform(const GraphicsLayer*, TransformationMatrix&) const override;
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bool isTrackingRepaints() const override;
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bool shouldSkipLayerInDump(const GraphicsLayer*, OptionSet<LayerTreeAsTextOptions>) const override;
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bool shouldDumpPropertyForLayer(const GraphicsLayer*, const char* propertyName, OptionSet<LayerTreeAsTextOptions>) const override;
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bool shouldAggressivelyRetainTiles(const GraphicsLayer*) const override;
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bool shouldTemporarilyRetainTileCohorts(const GraphicsLayer*) const override;
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bool useGiantTiles() const override;
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void logFilledVisibleFreshTile(unsigned) override;
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bool needsPixelAligment() const override { return !m_isMainFrameRenderViewLayer; }
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LayoutSize subpixelOffsetFromRenderer() const { return m_subpixelOffsetFromRenderer; }
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TransformationMatrix transformMatrixForProperty(AnimatedPropertyID) const final;
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#if PLATFORM(IOS_FAMILY)
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bool needsIOSDumpRenderTreeMainFrameRenderViewLayerIsAlwaysOpaqueHack(const GraphicsLayer&) const override;
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#endif
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#ifndef NDEBUG
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void verifyNotPainting() override;
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#endif
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WEBCORE_EXPORT LayoutRect contentsBox() const;
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// For informative purposes only.
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WEBCORE_EXPORT CompositingLayerType compositingLayerType() const;
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GraphicsLayer* layerForHorizontalScrollbar() const { return m_layerForHorizontalScrollbar.get(); }
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GraphicsLayer* layerForVerticalScrollbar() const { return m_layerForVerticalScrollbar.get(); }
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GraphicsLayer* layerForScrollCorner() const { return m_layerForScrollCorner.get(); }
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GraphicsLayer* overflowControlsContainer() const { return m_overflowControlsContainer.get(); }
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void adjustOverflowControlsPositionRelativeToAncestor(const RenderLayer&);
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bool canCompositeFilters() const { return m_canCompositeFilters; }
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#if ENABLE(FILTERS_LEVEL_2)
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bool canCompositeBackdropFilters() const { return m_canCompositeBackdropFilters; }
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#endif
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// Return an estimate of the backing store area (in pixels) allocated by this object's GraphicsLayers.
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WEBCORE_EXPORT double backingStoreMemoryEstimate() const;
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// For testing only.
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WEBCORE_EXPORT void setUsesDisplayListDrawing(bool);
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WEBCORE_EXPORT String displayListAsText(DisplayList::AsTextFlags) const;
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WEBCORE_EXPORT void setIsTrackingDisplayListReplay(bool);
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WEBCORE_EXPORT String replayDisplayListAsText(DisplayList::AsTextFlags) const;
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private:
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friend class PaintedContentsInfo;
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FloatRect backgroundBoxForSimpleContainerPainting() const;
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void createPrimaryGraphicsLayer();
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void destroyGraphicsLayers();
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void willDestroyLayer(const GraphicsLayer*);
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LayoutRect compositedBoundsIncludingMargin() const;
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Ref<GraphicsLayer> createGraphicsLayer(const String&, GraphicsLayer::Type = GraphicsLayer::Type::Normal);
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RenderLayerModelObject& renderer() const { return m_owningLayer.renderer(); }
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RenderBox* renderBox() const { return m_owningLayer.renderBox(); }
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RenderLayerCompositor& compositor() const { return m_owningLayer.compositor(); }
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void updateInternalHierarchy();
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bool updateAncestorClipping(bool needsAncestorClip, const RenderLayer* compositingAncestor);
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bool updateDescendantClippingLayer(bool needsDescendantClip);
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bool updateOverflowControlsLayers(bool needsHorizontalScrollbarLayer, bool needsVerticalScrollbarLayer, bool needsScrollCornerLayer);
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bool updateForegroundLayer(bool needsForegroundLayer);
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bool updateBackgroundLayer(bool needsBackgroundLayer);
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bool updateMaskingLayer(bool hasMask, bool hasClipPath);
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bool requiresLayerForScrollbar(Scrollbar*) const;
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bool requiresHorizontalScrollbarLayer() const;
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bool requiresVerticalScrollbarLayer() const;
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bool requiresScrollCornerLayer() const;
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bool updateScrollingLayers(bool scrollingLayers);
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void updateScrollOffset(ScrollOffset);
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void setLocationOfScrolledContents(ScrollOffset, ScrollingLayerPositionAction);
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void updateChildClippingStrategy(bool needsDescendantsClippingLayer);
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void updateMaskingLayerGeometry();
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void updateRootLayerConfiguration();
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void updatePaintingPhases();
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void setBackgroundLayerPaintsFixedRootBackground(bool);
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LayoutSize contentOffsetInCompositingLayer() const;
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// Result is transform origin in device pixels.
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FloatPoint3D computeTransformOriginForPainting(const LayoutRect& borderBox) const;
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LayoutSize offsetRelativeToRendererOriginForDescendantLayers() const;
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void ensureClippingStackLayers(LayerAncestorClippingStack&);
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void removeClippingStackLayers(LayerAncestorClippingStack&);
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void updateClippingStackLayerGeometry(LayerAncestorClippingStack&, const RenderLayer* compositedAncestor, LayoutRect& parentGraphicsLayerRect);
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void connectClippingStackLayers(LayerAncestorClippingStack&);
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void updateOpacity(const RenderStyle&);
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void updateTransform(const RenderStyle&);
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void updateChildrenTransformAndAnchorPoint(const LayoutRect& primaryGraphicsLayerRect, LayoutSize offsetFromParentGraphicsLayer);
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void updateFilters(const RenderStyle&);
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#if ENABLE(FILTERS_LEVEL_2)
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void updateBackdropFilters(const RenderStyle&);
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void updateBackdropFiltersGeometry();
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#endif
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#if ENABLE(CSS_COMPOSITING)
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void updateBlendMode(const RenderStyle&);
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#endif
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void updateCustomAppearance(const RenderStyle&);
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// Return the opacity value that this layer should use for compositing.
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float compositingOpacity(float rendererOpacity) const;
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Color rendererBackgroundColor() const;
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bool isMainFrameRenderViewLayer() const;
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bool paintsBoxDecorations() const;
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bool paintsContent(RenderLayer::PaintedContentRequest&) const;
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void updateDrawsContent(PaintedContentsInfo&);
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// Returns true if this compositing layer has no visible content.
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bool isSimpleContainerCompositingLayer(PaintedContentsInfo&) const;
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// Returns true if this layer has content that needs to be rendered by painting into the backing store.
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bool containsPaintedContent(PaintedContentsInfo&) const;
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// Returns true if the RenderLayer just contains an image that we can composite directly.
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bool isDirectlyCompositedImage() const;
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void updateImageContents(PaintedContentsInfo&);
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void updateDirectlyCompositedBoxDecorations(PaintedContentsInfo&, bool& didUpdateContentsRect);
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void updateDirectlyCompositedBackgroundColor(PaintedContentsInfo&, bool& didUpdateContentsRect);
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void updateDirectlyCompositedBackgroundImage(PaintedContentsInfo&, bool& didUpdateContentsRect);
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void resetContentsRect();
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void updateContentsRects();
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bool isPaintDestinationForDescendantLayers(RenderLayer::PaintedContentRequest&) const;
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bool hasVisibleNonCompositedDescendants() const;
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bool shouldClipCompositedBounds() const;
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bool hasTiledBackingFlatteningLayer() const { return (m_childContainmentLayer && m_isFrameLayerWithTiledBacking); }
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GraphicsLayer* tileCacheFlatteningLayer() const { return m_isFrameLayerWithTiledBacking ? m_childContainmentLayer.get() : nullptr; }
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void paintIntoLayer(const GraphicsLayer*, GraphicsContext&, const IntRect& paintDirtyRect, OptionSet<PaintBehavior>, EventRegionContext* = nullptr);
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OptionSet<RenderLayer::PaintLayerFlag> paintFlagsForLayer(const GraphicsLayer&) const;
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void paintDebugOverlays(const GraphicsLayer*, GraphicsContext&);
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static CSSPropertyID graphicsLayerToCSSProperty(AnimatedPropertyID);
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static AnimatedPropertyID cssToGraphicsLayerProperty(CSSPropertyID);
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bool canIssueSetNeedsDisplay() const { return !paintsIntoWindow() && !paintsIntoCompositedAncestor(); }
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LayoutRect computeParentGraphicsLayerRect(const RenderLayer* compositedAncestor) const;
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LayoutRect computePrimaryGraphicsLayerRect(const RenderLayer* compositedAncestor, const LayoutRect& parentGraphicsLayerRect) const;
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#if USE(OWNING_LAYER_BEAR_TRAP)
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uintptr_t m_owningLayerBearTrap { BEAR_TRAP_VALUE }; // webkit.org/b.206915
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#endif
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RenderLayer& m_owningLayer;
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// A list other layers that paint into this backing store, later than m_owningLayer in paint order.
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Vector<WeakPtr<RenderLayer>> m_backingSharingLayers;
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std::unique_ptr<LayerAncestorClippingStack> m_ancestorClippingStack; // Only used if we are clipped by an ancestor which is not a stacking context.
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std::unique_ptr<LayerAncestorClippingStack> m_overflowControlsHostLayerAncestorClippingStack; // Used when we have an overflow controls host layer which was reparented, and needs clipping by ancestors.
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RefPtr<GraphicsLayer> m_contentsContainmentLayer; // Only used if we have a background layer; takes the transform.
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RefPtr<GraphicsLayer> m_graphicsLayer;
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RefPtr<GraphicsLayer> m_foregroundLayer; // Only used in cases where we need to draw the foreground separately.
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RefPtr<GraphicsLayer> m_backgroundLayer; // Only used in cases where we need to draw the background separately.
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RefPtr<GraphicsLayer> m_childContainmentLayer; // Only used if we have clipping on a stacking context with compositing children, or if the layer has a tile cache.
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RefPtr<GraphicsLayer> m_maskLayer; // Only used if we have a mask and/or clip-path.
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RefPtr<GraphicsLayer> m_childClippingMaskLayer; // Only used if we have to clip child layers or accelerated contents with border radius or clip-path.
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RefPtr<GraphicsLayer> m_layerForHorizontalScrollbar;
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RefPtr<GraphicsLayer> m_layerForVerticalScrollbar;
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RefPtr<GraphicsLayer> m_layerForScrollCorner;
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RefPtr<GraphicsLayer> m_overflowControlsContainer;
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RefPtr<GraphicsLayer> m_scrollContainerLayer; // Only used if the layer is using composited scrolling.
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RefPtr<GraphicsLayer> m_scrolledContentsLayer; // Only used if the layer is using composited scrolling.
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LayoutRect m_compositedBounds;
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LayoutSize m_subpixelOffsetFromRenderer; // This is the subpixel distance between the primary graphics layer and the associated renderer's bounds.
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LayoutSize m_compositedBoundsOffsetFromGraphicsLayer; // This is the subpixel distance between the primary graphics layer and the render layer bounds.
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ScrollingNodeID m_viewportConstrainedNodeID { 0 };
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ScrollingNodeID m_scrollingNodeID { 0 };
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ScrollingNodeID m_frameHostingNodeID { 0 };
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ScrollingNodeID m_positioningNodeID { 0 };
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bool m_artificiallyInflatedBounds { false }; // bounds had to be made non-zero to make transform-origin work
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bool m_isMainFrameRenderViewLayer { false };
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bool m_isFrameLayerWithTiledBacking { false };
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bool m_requiresOwnBackingStore { true };
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bool m_canCompositeFilters { false };
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#if ENABLE(FILTERS_LEVEL_2)
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bool m_canCompositeBackdropFilters { false };
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#endif
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bool m_backgroundLayerPaintsFixedRootBackground { false };
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bool m_requiresBackgroundLayer { false };
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bool m_hasSubpixelRounding { false };
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bool m_paintsSubpixelAntialiasedText { false }; // This is for logging only.
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#if ENABLE(ASYNC_SCROLLING)
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bool m_needsEventRegionUpdate { true };
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#endif
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};
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enum CanvasCompositingStrategy {
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UnacceleratedCanvas,
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CanvasPaintedToLayer,
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CanvasAsLayerContents
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};
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CanvasCompositingStrategy canvasCompositingStrategy(const RenderObject&);
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WTF::TextStream& operator<<(WTF::TextStream&, const RenderLayerBacking&);
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} // namespace WebCore
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