1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* 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 {
WTF_MAKE_NONCOPYABLE(RenderLayerBacking); WTF_MAKE_FAST_ALLOCATED;
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;
void updateContentsScale(float);
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
|
