| /* |
| * Copyright (C) 2009, 2013 Apple 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 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. |
| */ |
| |
| #pragma once |
| |
| #include "ChromeClient.h" |
| #include "GraphicsLayerClient.h" |
| #include "GraphicsLayerUpdater.h" |
| #include "LayerAncestorClippingStack.h" |
| #include "RenderLayer.h" |
| #include <wtf/HashMap.h> |
| #include <wtf/OptionSet.h> |
| |
| namespace WebCore { |
| |
| class FixedPositionViewportConstraints; |
| class GraphicsLayer; |
| class GraphicsLayerUpdater; |
| class LayerOverlapMap; |
| class RenderEmbeddedObject; |
| class RenderVideo; |
| class RenderWidget; |
| class ScrollingCoordinator; |
| class StickyPositionViewportConstraints; |
| class TiledBacking; |
| |
| typedef unsigned LayerTreeFlags; |
| |
| enum class CompositingUpdateType { |
| AfterStyleChange, |
| AfterLayout, |
| OnScroll, |
| OnCompositedScroll |
| }; |
| |
| enum class CompositingReason { |
| Transform3D = 1 << 0, |
| Video = 1 << 1, |
| Canvas = 1 << 2, |
| Plugin = 1 << 3, |
| IFrame = 1 << 4, |
| BackfaceVisibilityHidden = 1 << 5, |
| ClipsCompositingDescendants = 1 << 6, |
| Animation = 1 << 7, |
| Filters = 1 << 8, |
| PositionFixed = 1 << 9, |
| PositionSticky = 1 << 10, |
| OverflowScrolling = 1 << 11, |
| Stacking = 1 << 12, |
| Overlap = 1 << 13, |
| OverflowScrollPositioning = 1 << 14, |
| NegativeZIndexChildren = 1 << 15, |
| TransformWithCompositedDescendants = 1 << 16, |
| OpacityWithCompositedDescendants = 1 << 17, |
| MaskWithCompositedDescendants = 1 << 18, |
| ReflectionWithCompositedDescendants = 1 << 19, |
| FilterWithCompositedDescendants = 1 << 20, |
| BlendingWithCompositedDescendants = 1 << 21, |
| Perspective = 1 << 22, |
| Preserve3D = 1 << 23, |
| WillChange = 1 << 24, |
| Root = 1 << 25, |
| IsolatesCompositedBlendingDescendants = 1 << 26, |
| EmbeddedView = 1 << 27, |
| }; |
| |
| enum class ScrollCoordinationRole { |
| ViewportConstrained = 1 << 0, |
| Scrolling = 1 << 1, |
| ScrollingProxy = 1 << 2, |
| FrameHosting = 1 << 3, |
| Positioning = 1 << 4, |
| }; |
| |
| static constexpr OptionSet<ScrollCoordinationRole> allScrollCoordinationRoles() |
| { |
| return { |
| ScrollCoordinationRole::Scrolling, |
| ScrollCoordinationRole::ScrollingProxy, |
| ScrollCoordinationRole::ViewportConstrained, |
| ScrollCoordinationRole::FrameHosting, |
| ScrollCoordinationRole::Positioning |
| }; |
| } |
| |
| #if PLATFORM(IOS_FAMILY) |
| class LegacyWebKitScrollingLayerCoordinator { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| LegacyWebKitScrollingLayerCoordinator(ChromeClient& chromeClient, bool coordinateViewportConstrainedLayers) |
| : m_chromeClient(chromeClient) |
| , m_coordinateViewportConstrainedLayers(coordinateViewportConstrainedLayers) |
| { |
| } |
| |
| void registerAllViewportConstrainedLayers(RenderLayerCompositor&); |
| void unregisterAllViewportConstrainedLayers(); |
| |
| void registerAllScrollingLayers(); |
| void unregisterAllScrollingLayers(); |
| |
| void addScrollingLayer(RenderLayer&); |
| void removeScrollingLayer(RenderLayer&, RenderLayerBacking&); |
| |
| void addViewportConstrainedLayer(RenderLayer&); |
| void removeViewportConstrainedLayer(RenderLayer&); |
| |
| void removeLayer(RenderLayer&); |
| |
| private: |
| void updateScrollingLayer(RenderLayer&); |
| |
| ChromeClient& m_chromeClient; |
| |
| HashSet<RenderLayer*> m_scrollingLayers; |
| HashSet<RenderLayer*> m_viewportConstrainedLayers; |
| |
| const bool m_coordinateViewportConstrainedLayers; |
| }; |
| #endif |
| |
| // RenderLayerCompositor manages the hierarchy of |
| // composited RenderLayers. It determines which RenderLayers |
| // become compositing, and creates and maintains a hierarchy of |
| // GraphicsLayers based on the RenderLayer painting order. |
| // |
| // There is one RenderLayerCompositor per RenderView. |
| |
| class RenderLayerCompositor final : public GraphicsLayerClient, public GraphicsLayerUpdaterClient { |
| WTF_MAKE_FAST_ALLOCATED; |
| friend class LegacyWebKitScrollingLayerCoordinator; |
| public: |
| explicit RenderLayerCompositor(RenderView&); |
| virtual ~RenderLayerCompositor(); |
| |
| // Return true if this RenderView is in "compositing mode" (i.e. has one or more |
| // composited RenderLayers) |
| bool usesCompositing() const { return m_compositing; } |
| // This will make a compositing layer at the root automatically, and hook up to |
| // the native view/window system. |
| void enableCompositingMode(bool enable = true); |
| |
| bool inForcedCompositingMode() const { return m_forceCompositingMode; } |
| |
| // True when some content element other than the root is composited. |
| bool hasContentCompositingLayers() const { return m_contentLayersCount; } |
| |
| // Returns true if the accelerated compositing is enabled |
| bool hasAcceleratedCompositing() const { return m_hasAcceleratedCompositing; } |
| |
| bool canRender3DTransforms() const; |
| |
| void willRecalcStyle(); |
| |
| // Returns true if the composited layers were actually updated. |
| bool didRecalcStyleWithNoPendingLayout(); |
| |
| // GraphicsLayers buffer state, which gets pushed to the underlying platform layers |
| // at specific times. |
| void scheduleRenderingUpdate(); |
| void flushPendingLayerChanges(bool isFlushRoot = true); |
| |
| // Called when the GraphicsLayer for the given RenderLayer has flushed changes inside of flushPendingLayerChanges(). |
| void didChangePlatformLayerForLayer(RenderLayer&, const GraphicsLayer*); |
| |
| // Called when something outside WebKit affects the visible rect (e.g. delegated scrolling). Might schedule a layer flush. |
| void didChangeVisibleRect(); |
| |
| // Rebuild the tree of compositing layers |
| bool updateCompositingLayers(CompositingUpdateType, RenderLayer* updateRoot = nullptr); |
| // This is only used when state changes and we do not exepect a style update or layout to happen soon (e.g. when |
| // we discover that an iframe is overlapped during painting). |
| void scheduleCompositingLayerUpdate(); |
| // This is used to cancel any pending update timers when the document goes into back/forward cache. |
| void cancelCompositingLayerUpdate(); |
| |
| enum class LayoutUpToDate { |
| Yes, No |
| }; |
| |
| struct RequiresCompositingData { |
| LayoutUpToDate layoutUpToDate { LayoutUpToDate::Yes }; |
| RenderLayer::ViewportConstrainedNotCompositedReason nonCompositedForPositionReason { RenderLayer::NoNotCompositedReason }; |
| bool reevaluateAfterLayout { false }; |
| }; |
| |
| // Whether layer's backing needs a graphics layer to do clipping by an ancestor (non-stacking-context parent with overflow). |
| bool clippedByAncestor(RenderLayer&, const RenderLayer* compositingAncestor) const; |
| |
| bool updateAncestorClippingStack(const RenderLayer&, const RenderLayer* compositingAncestor) const; |
| |
| // Returns the ScrollingNodeID for the containing async-scrollable layer that scrolls this renderer's border box. |
| // May return 0 for position-fixed content. |
| static ScrollingNodeID asyncScrollableContainerNodeID(const RenderObject&); |
| |
| // Whether layer's backing needs a graphics layer to clip z-order children of the given layer. |
| static bool clipsCompositingDescendants(const RenderLayer&); |
| |
| // Whether the given layer needs an extra 'contents' layer. |
| bool needsContentsCompositingLayer(const RenderLayer&) const; |
| |
| bool fixedLayerIntersectsViewport(const RenderLayer&) const; |
| |
| bool supportsFixedRootBackgroundCompositing() const; |
| bool needsFixedRootBackgroundLayer(const RenderLayer&) const; |
| GraphicsLayer* fixedRootBackgroundLayer() const; |
| |
| void rootOrBodyStyleChanged(RenderElement&, const RenderStyle* oldStyle); |
| |
| // Called after the view transparency, or the document or base background color change. |
| void rootBackgroundColorOrTransparencyChanged(); |
| |
| // Repaint the appropriate layers when the given RenderLayer starts or stops being composited. |
| void repaintOnCompositingChange(RenderLayer&); |
| |
| void repaintInCompositedAncestor(RenderLayer&, const LayoutRect&); |
| |
| // Notify us that a layer has been added or removed |
| void layerWasAdded(RenderLayer& parent, RenderLayer& child); |
| void layerWillBeRemoved(RenderLayer& parent, RenderLayer& child); |
| |
| void layerStyleChanged(StyleDifference, RenderLayer&, const RenderStyle* oldStyle); |
| |
| static bool canCompositeClipPath(const RenderLayer&); |
| |
| // Get the nearest ancestor layer that has overflow or clip, but is not a stacking context |
| RenderLayer* enclosingNonStackingClippingLayer(const RenderLayer&) const; |
| |
| // Repaint all composited layers. |
| void repaintCompositedLayers(); |
| |
| // Returns true if the given layer needs it own backing store. |
| bool requiresOwnBackingStore(const RenderLayer&, const RenderLayer* compositingAncestorLayer, const LayoutRect& layerCompositedBoundsInAncestor, const LayoutRect& ancestorCompositedBounds) const; |
| |
| WEBCORE_EXPORT RenderLayer& rootRenderLayer() const; |
| GraphicsLayer* rootGraphicsLayer() const; |
| |
| GraphicsLayer* scrollContainerLayer() const { return m_scrollContainerLayer.get(); } |
| GraphicsLayer* scrolledContentsLayer() const { return m_scrolledContentsLayer.get(); } |
| GraphicsLayer* clipLayer() const { return m_clipLayer.get(); } |
| GraphicsLayer* rootContentsLayer() const { return m_rootContentsLayer.get(); } |
| |
| GraphicsLayer* layerForClipping() const { return m_clipLayer ? m_clipLayer.get() : m_scrollContainerLayer.get(); } |
| |
| #if ENABLE(RUBBER_BANDING) |
| GraphicsLayer* headerLayer() const { return m_layerForHeader.get(); } |
| GraphicsLayer* footerLayer() const { return m_layerForFooter.get(); } |
| #endif |
| |
| enum RootLayerAttachment { |
| RootLayerUnattached, |
| RootLayerAttachedViaChromeClient, |
| RootLayerAttachedViaEnclosingFrame |
| }; |
| |
| RootLayerAttachment rootLayerAttachment() const { return m_rootLayerAttachment; } |
| void updateRootLayerAttachment(); |
| void updateRootLayerPosition(); |
| |
| void setIsInWindow(bool); |
| |
| void clearBackingForAllLayers(); |
| |
| void layerBecameComposited(const RenderLayer&); |
| void layerBecameNonComposited(const RenderLayer&); |
| |
| #if ENABLE(VIDEO) |
| // Use by RenderVideo to ask if it should try to use accelerated compositing. |
| bool canAccelerateVideoRendering(RenderVideo&) const; |
| #endif |
| |
| // Walk the tree looking for layers with 3d transforms. Useful in case you need |
| // to know if there is non-affine content, e.g. for drawing into an image. |
| bool has3DContent() const; |
| |
| static bool isCompositedSubframeRenderer(const RenderObject&); |
| static RenderLayerCompositor* frameContentsCompositor(RenderWidget&); |
| // Return true if the layers changed. |
| bool parentFrameContentLayers(RenderWidget&); |
| |
| // Update the geometry of the layers used for clipping and scrolling in frames. |
| void frameViewDidChangeLocation(const IntPoint& contentsOffset); |
| void frameViewDidChangeSize(); |
| void frameViewDidScroll(); |
| void frameViewDidAddOrRemoveScrollbars(); |
| void frameViewDidLayout(); |
| void rootLayerConfigurationChanged(); |
| |
| void widgetDidChangeSize(RenderWidget&); |
| |
| String layerTreeAsText(LayerTreeFlags); |
| |
| float deviceScaleFactor() const override; |
| float contentsScaleMultiplierForNewTiles(const GraphicsLayer*) const override; |
| float pageScaleFactor() const override; |
| float zoomedOutPageScaleFactor() const override; |
| void didChangePlatformLayerForLayer(const GraphicsLayer*) override { } |
| void notifyFlushBeforeDisplayRefresh(const GraphicsLayer*) override; |
| |
| void layerTiledBackingUsageChanged(const GraphicsLayer*, bool /*usingTiledBacking*/); |
| |
| bool acceleratedDrawingEnabled() const { return m_acceleratedDrawingEnabled; } |
| bool displayListDrawingEnabled() const { return m_displayListDrawingEnabled; } |
| |
| void deviceOrPageScaleFactorChanged(); |
| |
| void windowScreenDidChange(PlatformDisplayID); |
| |
| GraphicsLayer* layerForHorizontalScrollbar() const { return m_layerForHorizontalScrollbar.get(); } |
| GraphicsLayer* layerForVerticalScrollbar() const { return m_layerForVerticalScrollbar.get(); } |
| GraphicsLayer* layerForScrollCorner() const { return m_layerForScrollCorner.get(); } |
| #if ENABLE(RUBBER_BANDING) |
| GraphicsLayer* layerForOverhangAreas() const { return m_layerForOverhangAreas.get(); } |
| GraphicsLayer* layerForContentShadow() const { return m_contentShadowLayer.get(); } |
| |
| GraphicsLayer* updateLayerForTopOverhangArea(bool wantsLayer); |
| GraphicsLayer* updateLayerForBottomOverhangArea(bool wantsLayer); |
| GraphicsLayer* updateLayerForHeader(bool wantsLayer); |
| GraphicsLayer* updateLayerForFooter(bool wantsLayer); |
| #endif |
| |
| // FIXME: make the coordinated/async terminology consistent. |
| bool isViewportConstrainedFixedOrStickyLayer(const RenderLayer&) const; |
| bool useCoordinatedScrollingForLayer(const RenderLayer&) const; |
| ScrollPositioningBehavior computeCoordinatedPositioningForLayer(const RenderLayer&, const RenderLayer* compositingAncestor) const; |
| bool isLayerForIFrameWithScrollCoordinatedContents(const RenderLayer&) const; |
| |
| ScrollableArea* scrollableAreaForScrollingNodeID(ScrollingNodeID) const; |
| |
| void removeFromScrollCoordinatedLayers(RenderLayer&); |
| |
| void willRemoveScrollingLayerWithBacking(RenderLayer&, RenderLayerBacking&); |
| void didAddScrollingLayer(RenderLayer&); |
| |
| void resetTrackedRepaintRects(); |
| void setTracksRepaints(bool tracksRepaints) { m_isTrackingRepaints = tracksRepaints; } |
| |
| bool viewHasTransparentBackground(Color* backgroundColor = nullptr) const; |
| |
| bool viewNeedsToInvalidateEventRegionOfEnclosingCompositingLayerForRepaint() const; |
| |
| bool hasNonMainLayersWithTiledBacking() const { return m_layersWithTiledBackingCount; } |
| |
| OptionSet<CompositingReason> reasonsForCompositing(const RenderLayer&) const; |
| |
| void didPaintBacking(RenderLayerBacking*); |
| |
| const Color& rootExtendedBackgroundColor() const { return m_rootExtendedBackgroundColor; } |
| |
| void updateRootContentLayerClipping(); |
| |
| #if ENABLE(CSS_SCROLL_SNAP) |
| void updateScrollSnapPropertiesWithFrameView(const FrameView&) const; |
| #endif |
| |
| // For testing. |
| void startTrackingLayerFlushes() { m_layerFlushCount = 0; } |
| unsigned layerFlushCount() const { return m_layerFlushCount; } |
| |
| void startTrackingCompositingUpdates() { m_compositingUpdateCount = 0; } |
| unsigned compositingUpdateCount() const { return m_compositingUpdateCount; } |
| |
| private: |
| class BackingSharingState; |
| struct CompositingState; |
| struct OverlapExtent; |
| struct UpdateBackingTraversalState; |
| |
| // Returns true if the policy changed. |
| bool updateCompositingPolicy(); |
| |
| // GraphicsLayerClient implementation |
| void notifyFlushRequired(const GraphicsLayer*) override; |
| void paintContents(const GraphicsLayer*, GraphicsContext&, const FloatRect&, GraphicsLayerPaintBehavior) override; |
| void customPositionForVisibleRectComputation(const GraphicsLayer*, FloatPoint&) const override; |
| bool isTrackingRepaints() const override { return m_isTrackingRepaints; } |
| |
| // GraphicsLayerUpdaterClient implementation |
| void flushLayersSoon(GraphicsLayerUpdater&) override; |
| |
| // Copy the accelerated compositing related flags from Settings |
| void cacheAcceleratedCompositingFlags(); |
| void cacheAcceleratedCompositingFlagsAfterLayout(); |
| |
| // Whether the given RL needs a compositing layer. |
| bool needsToBeComposited(const RenderLayer&, RequiresCompositingData&) const; |
| // Whether the layer has an intrinsic need for compositing layer. |
| bool requiresCompositingLayer(const RenderLayer&, RequiresCompositingData&) const; |
| // Whether the layer could ever be composited. |
| bool canBeComposited(const RenderLayer&) const; |
| bool needsCompositingUpdateForStyleChangeOnNonCompositedLayer(RenderLayer&, const RenderStyle* oldStyle) const; |
| |
| // Make or destroy the backing for this layer; returns true if backing changed. |
| enum class BackingRequired { No, Yes, Unknown }; |
| bool updateBacking(RenderLayer&, RequiresCompositingData&, BackingSharingState* = nullptr, BackingRequired = BackingRequired::Unknown); |
| bool updateLayerCompositingState(RenderLayer&, const RenderLayer* compositingAncestor, RequiresCompositingData&, BackingSharingState&); |
| |
| void clearBackingForLayerIncludingDescendants(RenderLayer&); |
| |
| // Repaint this and its child layers. |
| void recursiveRepaintLayer(RenderLayer&); |
| bool layerRepaintTargetsBackingSharingLayer(RenderLayer&, BackingSharingState&) const; |
| |
| void computeExtent(const LayerOverlapMap&, const RenderLayer&, OverlapExtent&) const; |
| void addToOverlapMap(LayerOverlapMap&, const RenderLayer&, OverlapExtent&) const; |
| void addDescendantsToOverlapMapRecursive(LayerOverlapMap&, const RenderLayer&, const RenderLayer* ancestorLayer = nullptr) const; |
| void updateOverlapMap(LayerOverlapMap&, const RenderLayer&, OverlapExtent&, bool didPushContainer, bool addLayerToOverlap, bool addDescendantsToOverlap = false) const; |
| bool layerOverlaps(const LayerOverlapMap&, const RenderLayer&, OverlapExtent&) const; |
| |
| void updateCompositingLayersTimerFired(); |
| |
| void computeCompositingRequirements(RenderLayer* ancestorLayer, RenderLayer&, LayerOverlapMap&, CompositingState&, BackingSharingState&, bool& descendantHas3DTransform); |
| void traverseUnchangedSubtree(RenderLayer* ancestorLayer, RenderLayer&, LayerOverlapMap&, CompositingState&, BackingSharingState&, bool& descendantHas3DTransform); |
| |
| enum class UpdateLevel { |
| AllDescendants = 1 << 0, |
| CompositedChildren = 1 << 1, |
| }; |
| // Recurses down the tree, parenting descendant compositing layers and collecting an array of child layers for the current compositing layer. |
| void updateBackingAndHierarchy(RenderLayer&, Vector<Ref<GraphicsLayer>>& childGraphicsLayersOfEnclosingLayer, struct UpdateBackingTraversalState&, struct ScrollingTreeState&, OptionSet<UpdateLevel> = { }); |
| |
| bool layerHas3DContent(const RenderLayer&) const; |
| bool isRunningTransformAnimation(RenderLayerModelObject&) const; |
| |
| void appendDocumentOverlayLayers(Vector<Ref<GraphicsLayer>>&); |
| |
| bool needsCompositingForContentOrOverlays() const; |
| |
| void ensureRootLayer(); |
| void destroyRootLayer(); |
| |
| void attachRootLayer(RootLayerAttachment); |
| void detachRootLayer(); |
| |
| void rootLayerAttachmentChanged(); |
| |
| void updateOverflowControlsLayers(); |
| |
| void updateScrollLayerPosition(); |
| void updateScrollLayerClipping(); |
| |
| FloatPoint positionForClipLayer() const; |
| |
| void notifyIFramesOfCompositingChange(); |
| |
| #if PLATFORM(IOS_FAMILY) |
| void updateScrollCoordinatedLayersAfterFlushIncludingSubframes(); |
| void updateScrollCoordinatedLayersAfterFlush(); |
| #endif |
| |
| FloatRect visibleRectForLayerFlushing() const; |
| |
| Page& page() const; |
| |
| GraphicsLayerFactory* graphicsLayerFactory() const; |
| ScrollingCoordinator* scrollingCoordinator() const; |
| |
| RefPtr<DisplayRefreshMonitor> createDisplayRefreshMonitor(PlatformDisplayID) const override; |
| |
| // Non layout-dependent |
| bool requiresCompositingForAnimation(RenderLayerModelObject&) const; |
| bool requiresCompositingForTransform(RenderLayerModelObject&) const; |
| bool requiresCompositingForBackfaceVisibility(RenderLayerModelObject&) const; |
| bool requiresCompositingForVideo(RenderLayerModelObject&) const; |
| bool requiresCompositingForCanvas(RenderLayerModelObject&) const; |
| bool requiresCompositingForFilters(RenderLayerModelObject&) const; |
| bool requiresCompositingForWillChange(RenderLayerModelObject&) const; |
| |
| // Layout-dependent |
| bool requiresCompositingForPlugin(RenderLayerModelObject&, RequiresCompositingData&) const; |
| bool requiresCompositingForFrame(RenderLayerModelObject&, RequiresCompositingData&) const; |
| bool requiresCompositingForScrollableFrame(RequiresCompositingData&) const; |
| bool requiresCompositingForPosition(RenderLayerModelObject&, const RenderLayer&, RequiresCompositingData&) const; |
| bool requiresCompositingForOverflowScrolling(const RenderLayer&, RequiresCompositingData&) const; |
| bool requiresCompositingForEditableImage(RenderLayerModelObject&) const; |
| IndirectCompositingReason computeIndirectCompositingReason(const RenderLayer&, bool hasCompositedDescendants, bool has3DTransformedDescendants, bool paintsIntoProvidedBacking) const; |
| |
| static ScrollPositioningBehavior layerScrollBehahaviorRelativeToCompositedAncestor(const RenderLayer&, const RenderLayer& compositedAncestor); |
| |
| static bool styleChangeMayAffectIndirectCompositingReasons(const RenderStyle& oldStyle, const RenderStyle& newStyle); |
| |
| enum class ScrollingNodeChangeFlags { |
| Layer = 1 << 0, |
| LayerGeometry = 1 << 1, |
| }; |
| |
| ScrollingNodeID attachScrollingNode(RenderLayer&, ScrollingNodeType, struct ScrollingTreeState&); |
| ScrollingNodeID registerScrollingNodeID(ScrollingCoordinator&, ScrollingNodeID, ScrollingNodeType, struct ScrollingTreeState&); |
| |
| OptionSet<ScrollCoordinationRole> coordinatedScrollingRolesForLayer(const RenderLayer&, const RenderLayer* compositingAncestor) const; |
| |
| // Returns the ScrollingNodeID which acts as the parent for children. |
| ScrollingNodeID updateScrollCoordinationForLayer(RenderLayer&, const RenderLayer* compositingAncestor, struct ScrollingTreeState&, OptionSet<ScrollingNodeChangeFlags>); |
| |
| // These return the ScrollingNodeID which acts as the parent for children. |
| ScrollingNodeID updateScrollingNodeForViewportConstrainedRole(RenderLayer&, struct ScrollingTreeState&, OptionSet<ScrollingNodeChangeFlags>); |
| ScrollingNodeID updateScrollingNodeForScrollingRole(RenderLayer&, struct ScrollingTreeState&, OptionSet<ScrollingNodeChangeFlags>); |
| ScrollingNodeID updateScrollingNodeForScrollingProxyRole(RenderLayer&, struct ScrollingTreeState&, OptionSet<ScrollingNodeChangeFlags>); |
| ScrollingNodeID updateScrollingNodeForFrameHostingRole(RenderLayer&, struct ScrollingTreeState&, OptionSet<ScrollingNodeChangeFlags>); |
| ScrollingNodeID updateScrollingNodeForPositioningRole(RenderLayer&, const RenderLayer* compositingAncestor, struct ScrollingTreeState&, OptionSet<ScrollingNodeChangeFlags>); |
| |
| void updateScrollingNodeLayers(ScrollingNodeID, RenderLayer&, ScrollingCoordinator&); |
| |
| void detachScrollCoordinatedLayer(RenderLayer&, OptionSet<ScrollCoordinationRole>); |
| void detachScrollCoordinatedLayerWithRole(RenderLayer&, ScrollingCoordinator&, ScrollCoordinationRole); |
| |
| void updateSynchronousScrollingNodes(); |
| |
| FixedPositionViewportConstraints computeFixedViewportConstraints(RenderLayer&) const; |
| StickyPositionViewportConstraints computeStickyViewportConstraints(RenderLayer&) const; |
| |
| LayoutRect parentRelativeScrollableRect(const RenderLayer&, const RenderLayer* ancestorLayer) const; |
| |
| // Returns list of layers and their clip rects required to clip the given layer, which include clips in the |
| // containing block chain between the given layer and its composited ancestor. |
| Vector<CompositedClipData> computeAncestorClippingStack(const RenderLayer&, const RenderLayer* compositingAncestor) const; |
| |
| bool requiresScrollLayer(RootLayerAttachment) const; |
| bool requiresHorizontalScrollbarLayer() const; |
| bool requiresVerticalScrollbarLayer() const; |
| bool requiresScrollCornerLayer() const; |
| #if ENABLE(RUBBER_BANDING) |
| bool requiresOverhangAreasLayer() const; |
| bool requiresContentShadowLayer() const; |
| #endif |
| |
| // True if the FrameView uses a ScrollingCoordinator. |
| bool hasCoordinatedScrolling() const; |
| |
| // FIXME: make the coordinated/async terminology consistent. |
| bool isAsyncScrollableStickyLayer(const RenderLayer&, const RenderLayer** enclosingAcceleratedOverflowLayer = nullptr) const; |
| |
| bool shouldCompositeOverflowControls() const; |
| |
| #if !LOG_DISABLED |
| const char* logReasonsForCompositing(const RenderLayer&); |
| void logLayerInfo(const RenderLayer&, const char*, int depth); |
| #endif |
| |
| bool documentUsesTiledBacking() const; |
| bool isMainFrameCompositor() const; |
| |
| private: |
| RenderView& m_renderView; |
| Timer m_updateCompositingLayersTimer; |
| |
| ChromeClient::CompositingTriggerFlags m_compositingTriggers { static_cast<ChromeClient::CompositingTriggerFlags>(ChromeClient::AllTriggers) }; |
| bool m_hasAcceleratedCompositing { true }; |
| |
| CompositingPolicy m_compositingPolicy { CompositingPolicy::Normal }; |
| |
| bool m_showDebugBorders { false }; |
| bool m_showRepaintCounter { false }; |
| bool m_acceleratedDrawingEnabled { false }; |
| bool m_displayListDrawingEnabled { false }; |
| |
| bool m_compositing { false }; |
| bool m_flushingLayers { false }; |
| bool m_shouldFlushOnReattach { false }; |
| bool m_forceCompositingMode { false }; |
| bool m_inPostLayoutUpdate { false }; // true when it's OK to trust layout information (e.g. layer sizes and positions) |
| |
| bool m_isTrackingRepaints { false }; // Used for testing. |
| |
| unsigned m_contentLayersCount { 0 }; |
| unsigned m_layersWithTiledBackingCount { 0 }; |
| unsigned m_layerFlushCount { 0 }; |
| unsigned m_compositingUpdateCount { 0 }; |
| |
| RootLayerAttachment m_rootLayerAttachment { RootLayerUnattached }; |
| |
| RefPtr<GraphicsLayer> m_rootContentsLayer; |
| |
| // Enclosing clipping layer for iframe content |
| RefPtr<GraphicsLayer> m_clipLayer; |
| RefPtr<GraphicsLayer> m_scrollContainerLayer; |
| RefPtr<GraphicsLayer> m_scrolledContentsLayer; |
| |
| // Enclosing layer for overflow controls and the clipping layer |
| RefPtr<GraphicsLayer> m_overflowControlsHostLayer; |
| |
| // Layers for overflow controls |
| RefPtr<GraphicsLayer> m_layerForHorizontalScrollbar; |
| RefPtr<GraphicsLayer> m_layerForVerticalScrollbar; |
| RefPtr<GraphicsLayer> m_layerForScrollCorner; |
| #if ENABLE(RUBBER_BANDING) |
| RefPtr<GraphicsLayer> m_layerForOverhangAreas; |
| RefPtr<GraphicsLayer> m_contentShadowLayer; |
| RefPtr<GraphicsLayer> m_layerForTopOverhangArea; |
| RefPtr<GraphicsLayer> m_layerForBottomOverhangArea; |
| RefPtr<GraphicsLayer> m_layerForHeader; |
| RefPtr<GraphicsLayer> m_layerForFooter; |
| #endif |
| |
| std::unique_ptr<GraphicsLayerUpdater> m_layerUpdater; // Updates tiled layer visible area periodically while animations are running. |
| |
| bool m_viewBackgroundIsTransparent { false }; |
| |
| #if !LOG_DISABLED |
| int m_rootLayerUpdateCount { 0 }; |
| int m_obligateCompositedLayerCount { 0 }; // count of layer that have to be composited. |
| int m_secondaryCompositedLayerCount { 0 }; // count of layers that have to be composited because of stacking or overlap. |
| double m_obligatoryBackingStoreBytes { 0 }; |
| double m_secondaryBackingStoreBytes { 0 }; |
| #endif |
| |
| Color m_viewBackgroundColor; |
| Color m_rootExtendedBackgroundColor; |
| |
| HashMap<ScrollingNodeID, WeakPtr<RenderLayer>> m_scrollingNodeToLayerMap; |
| #if PLATFORM(IOS_FAMILY) |
| std::unique_ptr<LegacyWebKitScrollingLayerCoordinator> m_legacyScrollingLayerCoordinator; |
| #endif |
| }; |
| |
| void paintScrollbar(Scrollbar*, GraphicsContext&, const IntRect& clip); |
| |
| WTF::TextStream& operator<<(WTF::TextStream&, CompositingUpdateType); |
| WTF::TextStream& operator<<(WTF::TextStream&, CompositingPolicy); |
| |
| } // namespace WebCore |
| |
| #if ENABLE(TREE_DEBUGGING) |
| // Outside the WebCore namespace for ease of invocation from the debugger. |
| void showGraphicsLayerTreeForCompositor(WebCore::RenderLayerCompositor&); |
| #endif |
