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) 2010 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 LayerRendererChromium_h
#define LayerRendererChromium_h
#if USE(ACCELERATED_COMPOSITING)
#include "CanvasLayerChromium.h"
#include "ContentLayerChromium.h"
#include "IntRect.h"
#include "LayerChromium.h"
#include "PluginLayerChromium.h"
#include "RenderSurfaceChromium.h"
#include "SkBitmap.h"
#include "VideoLayerChromium.h"
#include <wtf/HashMap.h>
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
#if PLATFORM(CG)
#include <CoreGraphics/CGContext.h>
#include <wtf/RetainPtr.h>
#endif
namespace WebCore {
class GraphicsContext3D;
// Class that handles drawing of composited render layers using GL.
class LayerRendererChromium : public RefCounted<LayerRendererChromium> {
public:
static PassRefPtr<LayerRendererChromium> create(PassRefPtr<GraphicsContext3D> graphicsContext3D);
~LayerRendererChromium();
GraphicsContext3D* context();
// updates size of root texture, if needed, and scrolls the backbuffer.
void prepareToDrawLayers(const IntRect& visibleRect, const IntRect& contentRect, const IntPoint& scrollPosition);
// updates a rectangle within the root layer texture
void updateRootLayerTextureRect(const IntRect& updateRect);
// draws the current layers onto the backbuffer
void drawLayers(const IntRect& visibleRect, const IntRect& contentRect);
// waits for rendering to finish
void finish();
// puts backbuffer onscreen
void present();
void setRootLayer(PassRefPtr<LayerChromium> layer) { m_rootLayer = layer; }
LayerChromium* rootLayer() { return m_rootLayer.get(); }
void transferRootLayer(LayerRendererChromium* other) { other->m_rootLayer = m_rootLayer.release(); }
bool hardwareCompositing() const { return m_hardwareCompositing; }
void setRootLayerCanvasSize(const IntSize&);
GraphicsContext* rootLayerGraphicsContext() const { return m_rootLayerGraphicsContext.get(); }
unsigned createLayerTexture();
void deleteLayerTexture(unsigned);
static void debugGLCall(GraphicsContext3D*, const char* command, const char* file, int line);
const TransformationMatrix& projectionMatrix() const { return m_projectionMatrix; }
void useShader(unsigned);
bool checkTextureSize(const IntSize&);
const LayerChromium::SharedValues* layerSharedValues() const { return m_layerSharedValues.get(); }
const ContentLayerChromium::SharedValues* contentLayerSharedValues() const { return m_contentLayerSharedValues.get(); }
const CanvasLayerChromium::SharedValues* canvasLayerSharedValues() const { return m_canvasLayerSharedValues.get(); }
const VideoLayerChromium::SharedValues* videoLayerSharedValues() const { return m_videoLayerSharedValues.get(); }
const PluginLayerChromium::SharedValues* pluginLayerSharedValues() const { return m_pluginLayerSharedValues.get(); }
void resizeOnscreenContent(const IntSize&);
IntSize rootLayerTextureSize() const { return IntSize(m_rootLayerTextureWidth, m_rootLayerTextureHeight); }
IntRect rootLayerContentRect() const { return m_rootContentRect; }
void getFramebufferPixels(void *pixels, const IntRect& rect);
private:
explicit LayerRendererChromium(PassRefPtr<GraphicsContext3D> graphicsContext3D);
void updateLayersRecursive(LayerChromium* layer, const TransformationMatrix& parentMatrix, Vector<LayerChromium*>& renderSurfaceLayerList, Vector<LayerChromium*>& layerList);
void drawLayer(LayerChromium*, RenderSurfaceChromium*);
bool isLayerVisible(LayerChromium*, const TransformationMatrix&, const IntRect& visibleRect);
void setScissorToRect(const IntRect&);
void setDrawViewportRect(const IntRect&, bool flipY);
bool useRenderSurface(RenderSurfaceChromium*);
bool makeContextCurrent();
static bool compareLayerZ(const LayerChromium*, const LayerChromium*);
bool initializeSharedObjects();
void cleanupSharedObjects();
unsigned m_rootLayerTextureId;
int m_rootLayerTextureWidth;
int m_rootLayerTextureHeight;
// Shader uniform locations used by layers whose contents are the results of a
// previous rendering operation.
unsigned m_textureLayerShaderProgram;
int m_textureLayerShaderSamplerLocation;
int m_textureLayerShaderMatrixLocation;
int m_textureLayerShaderAlphaLocation;
TransformationMatrix m_projectionMatrix;
RefPtr<LayerChromium> m_rootLayer;
IntPoint m_scrollPosition;
bool m_hardwareCompositing;
unsigned m_currentShader;
RenderSurfaceChromium* m_currentRenderSurface;
unsigned m_offscreenFramebufferId;
#if PLATFORM(SKIA)
OwnPtr<skia::PlatformCanvas> m_rootLayerCanvas;
OwnPtr<PlatformContextSkia> m_rootLayerSkiaContext;
OwnPtr<GraphicsContext> m_rootLayerGraphicsContext;
#elif PLATFORM(CG)
Vector<uint8_t> m_rootLayerBackingStore;
RetainPtr<CGContextRef> m_rootLayerCGContext;
OwnPtr<GraphicsContext> m_rootLayerGraphicsContext;
#endif
IntSize m_rootLayerCanvasSize;
IntRect m_rootVisibleRect;
IntRect m_rootContentRect;
// Maximum texture dimensions supported.
int m_maxTextureSize;
// Store values that are shared between instances of each layer type
// associated with this instance of the compositor. Since there can be
// multiple instances of the compositor running in the same renderer process
// we cannot store these values in static variables.
OwnPtr<LayerChromium::SharedValues> m_layerSharedValues;
OwnPtr<ContentLayerChromium::SharedValues> m_contentLayerSharedValues;
OwnPtr<CanvasLayerChromium::SharedValues> m_canvasLayerSharedValues;
OwnPtr<VideoLayerChromium::SharedValues> m_videoLayerSharedValues;
OwnPtr<PluginLayerChromium::SharedValues> m_pluginLayerSharedValues;
RefPtr<GraphicsContext3D> m_context;
RenderSurfaceChromium* m_defaultRenderSurface;
};
// Setting DEBUG_GL_CALLS to 1 will call glGetError() after almost every GL
// call made by the compositor. Useful for debugging rendering issues but
// will significantly degrade performance.
#define DEBUG_GL_CALLS 0
#if DEBUG_GL_CALLS && !defined ( NDEBUG )
#define GLC(context, x) { (x), LayerRendererChromium::debugGLCall(context, #x, __FILE__, __LINE__); }
#else
#define GLC(context, x) (x)
#endif
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif
|
