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author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/rendering/RenderLayerBacking.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/rendering/RenderLayerBacking.h')
-rw-r--r-- | Source/WebCore/rendering/RenderLayerBacking.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderLayerBacking.h b/Source/WebCore/rendering/RenderLayerBacking.h new file mode 100644 index 0000000..c5489f3 --- /dev/null +++ b/Source/WebCore/rendering/RenderLayerBacking.h @@ -0,0 +1,208 @@ +/* + * 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 RenderLayerBacking_h +#define RenderLayerBacking_h + +#if USE(ACCELERATED_COMPOSITING) + +#include "FloatPoint.h" +#include "FloatPoint3D.h" +#include "GraphicsLayer.h" +#include "GraphicsLayerClient.h" +#include "RenderLayer.h" +#include "TransformationMatrix.h" + +namespace WebCore { + +class KeyframeList; +class RenderLayerCompositor; + +enum CompositingLayerType { + NormalCompositingLayer, // non-tiled layer with backing store + TiledCompositingLayer, // tiled layer (always has backing store) + MediaCompositingLayer, // layer that contains an image, video, webGL or plugin + ContainerCompositingLayer // layer with no backing store +}; + +// RenderLayerBacking controls the compositing behavior for a single RenderLayer. +// It holds the various GraphicsLayers, and makes decisions about intra-layer rendering +// optimizations. +// +// There is one RenderLayerBacking for each RenderLayer that is composited. + +class RenderLayerBacking : public GraphicsLayerClient, public Noncopyable { +public: + RenderLayerBacking(RenderLayer*); + ~RenderLayerBacking(); + + RenderLayer* owningLayer() const { return m_owningLayer; } + + enum UpdateDepth { CompositingChildren, AllDescendants }; + void updateAfterLayout(UpdateDepth, bool isUpdateRoot); + + // Returns true if layer configuration changed. + bool updateGraphicsLayerConfiguration(); + // Update graphics layer position and bounds. + void updateGraphicsLayerGeometry(); // make private + // Update contents and clipping structure. + void updateInternalHierarchy(); // make private + void updateDrawsContent(); + + GraphicsLayer* graphicsLayer() const { return m_graphicsLayer.get(); } + + // Layer to clip children + bool hasClippingLayer() const { return m_clippingLayer != 0; } + GraphicsLayer* clippingLayer() const { return m_clippingLayer.get(); } + + // Layer to get clipped by ancestor + bool hasAncestorClippingLayer() const { return m_ancestorClippingLayer != 0; } + GraphicsLayer* ancestorClippingLayer() const { return m_ancestorClippingLayer.get(); } + + bool hasContentsLayer() const { return m_foregroundLayer != 0; } + GraphicsLayer* foregroundLayer() const { return m_foregroundLayer.get(); } + + bool hasMaskLayer() const { return m_maskLayer != 0; } + + GraphicsLayer* parentForSublayers() const { return m_clippingLayer ? m_clippingLayer.get() : m_graphicsLayer.get(); } + GraphicsLayer* childForSuperlayers() const { return m_ancestorClippingLayer ? m_ancestorClippingLayer.get() : m_graphicsLayer.get(); } + + // RenderLayers with backing normally short-circuit paintLayer() because + // their content is rendered via callbacks from GraphicsLayer. However, the document + // layer is special, because it has a GraphicsLayer to act as a container for the GraphicsLayers + // for descendants, but its contents usually render into the window (in which case this returns true). + // This returns false for other layers, and when the document layer actually needs to paint into its backing store + // for some reason. + bool paintingGoesToWindow() const; + + void setContentsNeedDisplay(); + // r is in the coordinate space of the layer's render object + void setContentsNeedDisplayInRect(const IntRect& r); + + // Notification from the renderer that its content changed. + void contentChanged(RenderLayer::ContentChangeType); + + // Interface to start, finish, suspend and resume animations and transitions + bool startTransition(double timeOffset, int property, const RenderStyle* fromStyle, const RenderStyle* toStyle); + void transitionPaused(double timeOffset, int property); + void transitionFinished(int property); + + bool startAnimation(double timeOffset, const Animation* anim, const KeyframeList& keyframes); + void animationPaused(double timeOffset, const String& name); + void animationFinished(const String& name); + + void suspendAnimations(double time = 0); + void resumeAnimations(); + + IntRect compositedBounds() const; + void setCompositedBounds(const IntRect&); + void updateCompositedBounds(); + + void updateAfterWidgetResize(); + + FloatPoint graphicsLayerToContentsCoordinates(const GraphicsLayer*, const FloatPoint&); + FloatPoint contentsToGraphicsLayerCoordinates(const GraphicsLayer*, const FloatPoint&); + + // GraphicsLayerClient interface + virtual void notifyAnimationStarted(const GraphicsLayer*, double startTime); + virtual void notifySyncRequired(const GraphicsLayer*); + + virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& clip); + + virtual bool showDebugBorders() const; + virtual bool showRepaintCounter() const; + + IntRect contentsBox() const; + + // For informative purposes only. + CompositingLayerType compositingLayerType() const; + +private: + void createGraphicsLayer(); + void destroyGraphicsLayer(); + + RenderBoxModelObject* renderer() const { return m_owningLayer->renderer(); } + RenderLayerCompositor* compositor() const { return m_owningLayer->compositor(); } + + bool updateClippingLayers(bool needsAncestorClip, bool needsDescendantClip); + bool updateForegroundLayer(bool needsForegroundLayer); + bool updateMaskLayer(bool needsMaskLayer); + + GraphicsLayerPaintingPhase paintingPhaseForPrimaryLayer() const; + + IntSize contentOffsetInCompostingLayer() const; + // Result is transform origin in pixels. + FloatPoint3D computeTransformOrigin(const IntRect& borderBox) const; + // Result is perspective origin in pixels. + FloatPoint computePerspectiveOrigin(const IntRect& borderBox) const; + + void updateLayerOpacity(const RenderStyle*); + void updateLayerTransform(const RenderStyle*); + + // Return the opacity value that this layer should use for compositing. + float compositingOpacity(float rendererOpacity) const; + + // Returns true if this compositing layer has no visible content. + bool isSimpleContainerCompositingLayer() const; + // Returns true if this layer has content that needs to be rendered by painting into the backing store. + bool containsPaintedContent() const; + // Returns true if the RenderLayer just contains an image that we can composite directly. + bool isDirectlyCompositedImage() const; + void updateImageContents(); + + bool rendererHasBackground() const; + const Color rendererBackgroundColor() const; + + bool hasNonCompositingDescendants() const; + + void paintIntoLayer(RenderLayer* rootLayer, GraphicsContext*, const IntRect& paintDirtyRect, + PaintBehavior paintBehavior, GraphicsLayerPaintingPhase, RenderObject* paintingRoot); + + static int graphicsLayerToCSSProperty(AnimatedPropertyID); + static AnimatedPropertyID cssToGraphicsLayerProperty(int); + +#ifndef NDEBUG + String nameForLayer() const; +#endif + +private: + RenderLayer* m_owningLayer; + + OwnPtr<GraphicsLayer> m_ancestorClippingLayer; // only used if we are clipped by an ancestor which is not a stacking context + OwnPtr<GraphicsLayer> m_graphicsLayer; + OwnPtr<GraphicsLayer> m_foregroundLayer; // only used in cases where we need to draw the foreground separately + OwnPtr<GraphicsLayer> m_clippingLayer; // only used if we have clipping on a stacking context, with compositing children + OwnPtr<GraphicsLayer> m_maskLayer; // only used if we have a mask + + IntRect m_compositedBounds; + + bool m_artificiallyInflatedBounds; // bounds had to be made non-zero to make transform-origin work +}; + +} // namespace WebCore + +#endif // USE(ACCELERATED_COMPOSITING) + +#endif // RenderLayerBacking_h |