| /* |
| * Copyright (C) 2009 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 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. |
| */ |
| |
| #ifndef RenderLayerCompositor_h |
| #define RenderLayerCompositor_h |
| |
| #include "core/rendering/RenderLayer.h" |
| #include "core/rendering/compositing/CompositingReasonFinder.h" |
| #include "platform/graphics/GraphicsLayerClient.h" |
| #include "wtf/HashMap.h" |
| |
| namespace blink { |
| |
| class DocumentLifecycle; |
| class GraphicsLayer; |
| class GraphicsLayerFactory; |
| class Page; |
| class RenderPart; |
| class ScrollingCoordinator; |
| |
| enum CompositingUpdateType { |
| CompositingUpdateNone, |
| CompositingUpdateAfterGeometryChange, |
| CompositingUpdateAfterCompositingInputChange, |
| CompositingUpdateRebuildTree, |
| }; |
| |
| enum CompositingStateTransitionType { |
| NoCompositingStateChange, |
| AllocateOwnCompositedLayerMapping, |
| RemoveOwnCompositedLayerMapping, |
| PutInSquashingLayer, |
| RemoveFromSquashingLayer |
| }; |
| |
| // 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 { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| explicit RenderLayerCompositor(RenderView&); |
| virtual ~RenderLayerCompositor(); |
| |
| void updateIfNeededRecursive(); |
| |
| // Return true if this RenderView is in "compositing mode" (i.e. has one or more |
| // composited RenderLayers) |
| bool inCompositingMode() const; |
| // FIXME: Replace all callers with inCompositingMdoe and remove this function. |
| bool staleInCompositingMode() const; |
| // This will make a compositing layer at the root automatically, and hook up to |
| // the native view/window system. |
| void setCompositingModeEnabled(bool); |
| |
| // Returns true if the accelerated compositing is enabled |
| bool hasAcceleratedCompositing() const { return m_hasAcceleratedCompositing; } |
| bool layerSquashingEnabled() const; |
| |
| bool acceleratedCompositingForOverflowScrollEnabled() const; |
| |
| bool rootShouldAlwaysComposite() const; |
| |
| // Copy the accelerated compositing related flags from Settings |
| void updateAcceleratedCompositingSettings(); |
| |
| // Used to indicate that a compositing update will be needed for the next frame that gets drawn. |
| void setNeedsCompositingUpdate(CompositingUpdateType); |
| |
| void didLayout(); |
| |
| // Whether layer's compositedLayerMapping needs a GraphicsLayer to clip z-order children of the given RenderLayer. |
| bool clipsCompositingDescendants(const RenderLayer*) const; |
| |
| // Whether the given layer needs an extra 'contents' layer. |
| bool needsContentsCompositingLayer(const RenderLayer*) const; |
| |
| bool supportsFixedRootBackgroundCompositing() const; |
| bool needsFixedRootBackgroundLayer(const RenderLayer*) const; |
| GraphicsLayer* fixedRootBackgroundLayer() const; |
| void setNeedsUpdateFixedBackground() { m_needsUpdateFixedBackground = true; } |
| |
| // Issue paint invalidations of the appropriate layers when the given RenderLayer starts or stops being composited. |
| void paintInvalidationOnCompositingChange(RenderLayer*); |
| |
| void fullyInvalidatePaint(); |
| |
| RenderLayer* rootRenderLayer() const; |
| GraphicsLayer* rootGraphicsLayer() const; |
| GraphicsLayer* scrollLayer() const; |
| GraphicsLayer* containerLayer() const; |
| |
| // We don't always have a root transform layer. This function lazily allocates one |
| // and returns it as required. |
| GraphicsLayer* ensureRootTransformLayer(); |
| |
| enum RootLayerAttachment { |
| RootLayerUnattached, |
| RootLayerAttachedViaChromeClient, |
| RootLayerAttachedViaEnclosingFrame |
| }; |
| |
| RootLayerAttachment rootLayerAttachment() const { return m_rootLayerAttachment; } |
| void updateRootLayerAttachment(); |
| void updateRootLayerPosition(); |
| |
| void setIsInWindow(bool); |
| |
| static RenderLayerCompositor* frameContentsCompositor(RenderPart*); |
| // Return true if the layers changed. |
| static bool parentFrameContentLayers(RenderPart*); |
| |
| // Update the geometry of the layers used for clipping and scrolling in frames. |
| void frameViewDidChangeLocation(const IntPoint& contentsOffset); |
| void frameViewDidChangeSize(); |
| void frameViewDidScroll(); |
| void frameViewScrollbarsExistenceDidChange(); |
| void rootFixedBackgroundsChanged(); |
| |
| bool scrollingLayerDidChange(RenderLayer*); |
| |
| String layerTreeAsText(LayerTreeFlags); |
| |
| GraphicsLayer* layerForHorizontalScrollbar() const { return m_layerForHorizontalScrollbar.get(); } |
| GraphicsLayer* layerForVerticalScrollbar() const { return m_layerForVerticalScrollbar.get(); } |
| GraphicsLayer* layerForScrollCorner() const { return m_layerForScrollCorner.get(); } |
| |
| void resetTrackedPaintInvalidationRects(); |
| void setTracksPaintInvalidations(bool); |
| |
| virtual String debugName(const GraphicsLayer*) OVERRIDE; |
| DocumentLifecycle& lifecycle() const; |
| |
| void updatePotentialCompositingReasonsFromStyle(RenderLayer*); |
| |
| // Whether the layer could ever be composited. |
| bool canBeComposited(const RenderLayer*) const; |
| |
| // FIXME: Move allocateOrClearCompositedLayerMapping to CompositingLayerAssigner once we've fixed |
| // the compositing chicken/egg issues. |
| bool allocateOrClearCompositedLayerMapping(RenderLayer*, CompositingStateTransitionType compositedLayerUpdate); |
| |
| void updateDirectCompositingReasons(RenderLayer*); |
| |
| void setOverlayLayer(GraphicsLayer*); |
| |
| bool inOverlayFullscreenVideo() const { return m_inOverlayFullscreenVideo; } |
| |
| private: |
| class OverlapMap; |
| |
| #if ENABLE(ASSERT) |
| void assertNoUnresolvedDirtyBits(); |
| #endif |
| |
| // GraphicsLayerClient implementation |
| virtual void notifyAnimationStarted(const GraphicsLayer*, double) OVERRIDE { } |
| virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect&) OVERRIDE; |
| |
| virtual bool isTrackingPaintInvalidations() const OVERRIDE; |
| |
| // Whether the given RL needs to paint into its own separate backing (and hence would need its own CompositedLayerMapping). |
| bool needsOwnBacking(const RenderLayer*) const; |
| |
| void updateWithoutAcceleratedCompositing(CompositingUpdateType); |
| void updateIfNeeded(); |
| |
| void computeCompositingRequirements(RenderLayer* ancestorLayer, RenderLayer*, OverlapMap&, struct CompositingRecursionData&, bool& descendantHas3DTransform, Vector<RenderLayer*>& unclippedDescendants, IntRect& absoluteDecendantBoundingBox); |
| |
| bool hasAnyAdditionalCompositedLayers(const RenderLayer* rootLayer) const; |
| |
| void ensureRootLayer(); |
| void destroyRootLayer(); |
| |
| void attachRootLayer(RootLayerAttachment); |
| void detachRootLayer(); |
| |
| void updateOverflowControlsLayers(); |
| |
| Page* page() const; |
| |
| GraphicsLayerFactory* graphicsLayerFactory() const; |
| ScrollingCoordinator* scrollingCoordinator() const; |
| |
| void enableCompositingModeIfNeeded(); |
| |
| bool requiresHorizontalScrollbarLayer() const; |
| bool requiresVerticalScrollbarLayer() const; |
| bool requiresScrollCornerLayer() const; |
| |
| void applyOverlayFullscreenVideoAdjustment(); |
| |
| RenderView& m_renderView; |
| OwnPtr<GraphicsLayer> m_rootContentLayer; |
| OwnPtr<GraphicsLayer> m_rootTransformLayer; |
| |
| CompositingReasonFinder m_compositingReasonFinder; |
| |
| CompositingUpdateType m_pendingUpdateType; |
| |
| bool m_hasAcceleratedCompositing; |
| bool m_compositing; |
| |
| // The root layer doesn't composite if it's a non-scrollable frame. |
| // So, after a layout we set this dirty bit to know that we need |
| // to recompute whether the root layer should composite even if |
| // none of its descendants composite. |
| // FIXME: Get rid of all the callers of setCompositingModeEnabled |
| // except the one in updateIfNeeded, then rename this to |
| // m_compositingDirty. |
| bool m_rootShouldAlwaysCompositeDirty; |
| bool m_needsUpdateFixedBackground; |
| bool m_isTrackingPaintInvalidations; // Used for testing. |
| |
| RootLayerAttachment m_rootLayerAttachment; |
| |
| // Enclosing container layer, which clips for iframe content |
| OwnPtr<GraphicsLayer> m_containerLayer; |
| OwnPtr<GraphicsLayer> m_scrollLayer; |
| |
| // Enclosing layer for overflow controls and the clipping layer |
| OwnPtr<GraphicsLayer> m_overflowControlsHostLayer; |
| |
| // Layers for overflow controls |
| OwnPtr<GraphicsLayer> m_layerForHorizontalScrollbar; |
| OwnPtr<GraphicsLayer> m_layerForVerticalScrollbar; |
| OwnPtr<GraphicsLayer> m_layerForScrollCorner; |
| #if USE(RUBBER_BANDING) |
| OwnPtr<GraphicsLayer> m_layerForOverhangShadow; |
| #endif |
| |
| bool m_inOverlayFullscreenVideo; |
| }; |
| |
| } // namespace blink |
| |
| #endif // RenderLayerCompositor_h |