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1 /* | 1 /* |
2 * Copyright (C) 2009 Apple Inc. All rights reserved. | 2 * Copyright (C) 2009 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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25 | 25 |
26 #ifndef CanvasRenderingContext_h | 26 #ifndef CanvasRenderingContext_h |
27 #define CanvasRenderingContext_h | 27 #define CanvasRenderingContext_h |
28 | 28 |
29 #include "core/CoreExport.h" | 29 #include "core/CoreExport.h" |
30 #include "core/html/HTMLCanvasElement.h" | 30 #include "core/html/HTMLCanvasElement.h" |
31 #include "core/html/canvas/CanvasContextCreationAttributes.h" | 31 #include "core/html/canvas/CanvasContextCreationAttributes.h" |
32 #include "core/layout/HitTestCanvasResult.h" | 32 #include "core/layout/HitTestCanvasResult.h" |
33 #include "core/offscreencanvas/OffscreenCanvas.h" | 33 #include "core/offscreencanvas/OffscreenCanvas.h" |
34 #include "platform/graphics/ColorBehavior.h" | 34 #include "platform/graphics/ColorBehavior.h" |
| 35 #include "public/platform/WebThread.h" |
35 #include "third_party/skia/include/core/SkColorSpace.h" | 36 #include "third_party/skia/include/core/SkColorSpace.h" |
36 #include "third_party/skia/include/core/SkImageInfo.h" | 37 #include "third_party/skia/include/core/SkImageInfo.h" |
37 #include "wtf/HashSet.h" | 38 #include "wtf/HashSet.h" |
38 #include "wtf/Noncopyable.h" | 39 #include "wtf/Noncopyable.h" |
39 #include "wtf/text/StringHash.h" | 40 #include "wtf/text/StringHash.h" |
40 | 41 |
41 class SkCanvas; | 42 class SkCanvas; |
42 | 43 |
43 namespace blink { | 44 namespace blink { |
44 | 45 |
45 class CanvasImageSource; | 46 class CanvasImageSource; |
46 class HTMLCanvasElement; | 47 class HTMLCanvasElement; |
47 class ImageData; | 48 class ImageData; |
48 class ImageBitmap; | 49 class ImageBitmap; |
49 class WebLayer; | 50 class WebLayer; |
50 | 51 |
51 enum CanvasColorSpace { | 52 enum CanvasColorSpace { |
52 kLegacyCanvasColorSpace, | 53 kLegacyCanvasColorSpace, |
53 kSRGBCanvasColorSpace, | 54 kSRGBCanvasColorSpace, |
54 kLinearRGBCanvasColorSpace, | 55 kLinearRGBCanvasColorSpace, |
55 }; | 56 }; |
56 | 57 |
57 class CORE_EXPORT CanvasRenderingContext | 58 class CORE_EXPORT CanvasRenderingContext |
58 : public GarbageCollectedFinalized<CanvasRenderingContext>, | 59 : public GarbageCollectedFinalized<CanvasRenderingContext>, |
59 public ScriptWrappable { | 60 public ScriptWrappable, |
| 61 public WebThread::TaskObserver { |
60 WTF_MAKE_NONCOPYABLE(CanvasRenderingContext); | 62 WTF_MAKE_NONCOPYABLE(CanvasRenderingContext); |
61 USING_PRE_FINALIZER(CanvasRenderingContext, dispose); | 63 USING_PRE_FINALIZER(CanvasRenderingContext, dispose); |
62 | 64 |
63 public: | 65 public: |
64 virtual ~CanvasRenderingContext() {} | 66 virtual ~CanvasRenderingContext() {} |
65 | 67 |
66 // A Canvas can either be "2D" or "webgl" but never both. If you request a 2D | 68 // A Canvas can either be "2D" or "webgl" but never both. If you request a 2D |
67 // canvas and the existing context is already 2D, just return that. If the | 69 // canvas and the existing context is already 2D, just return that. If the |
68 // existing context is WebGL, then destroy it before creating a new 2D | 70 // existing context is WebGL, then destroy it before creating a new 2D |
69 // context. Vice versa when requesting a WebGL canvas. Requesting a context | 71 // context. Vice versa when requesting a WebGL canvas. Requesting a context |
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96 virtual ContextType getContextType() const = 0; | 98 virtual ContextType getContextType() const = 0; |
97 virtual bool isAccelerated() const { return false; } | 99 virtual bool isAccelerated() const { return false; } |
98 virtual bool shouldAntialias() const { return false; } | 100 virtual bool shouldAntialias() const { return false; } |
99 virtual void setIsHidden(bool) = 0; | 101 virtual void setIsHidden(bool) = 0; |
100 virtual bool isContextLost() const { return true; } | 102 virtual bool isContextLost() const { return true; } |
101 virtual void setCanvasGetContextResult(RenderingContext&) { NOTREACHED(); }; | 103 virtual void setCanvasGetContextResult(RenderingContext&) { NOTREACHED(); }; |
102 virtual void setOffscreenCanvasGetContextResult(OffscreenRenderingContext&) { | 104 virtual void setOffscreenCanvasGetContextResult(OffscreenRenderingContext&) { |
103 NOTREACHED(); | 105 NOTREACHED(); |
104 } | 106 } |
105 virtual bool isPaintable() const = 0; | 107 virtual bool isPaintable() const = 0; |
| 108 virtual void didDraw(const SkIRect& dirtyRect); |
106 | 109 |
107 // Return true if the content is updated. | 110 // Return true if the content is updated. |
108 virtual bool paintRenderingResultsToCanvas(SourceDrawingBuffer) { | 111 virtual bool paintRenderingResultsToCanvas(SourceDrawingBuffer) { |
109 return false; | 112 return false; |
110 } | 113 } |
111 | 114 |
112 virtual WebLayer* platformLayer() const { return nullptr; } | 115 virtual WebLayer* platformLayer() const { return nullptr; } |
113 | 116 |
114 enum LostContextMode { | 117 enum LostContextMode { |
115 NotLostContext, | 118 NotLostContext, |
116 | 119 |
117 // Lost context occurred at the graphics system level. | 120 // Lost context occurred at the graphics system level. |
118 RealLostContext, | 121 RealLostContext, |
119 | 122 |
120 // Lost context provoked by WEBGL_lose_context. | 123 // Lost context provoked by WEBGL_lose_context. |
121 WebGLLoseContextLostContext, | 124 WebGLLoseContextLostContext, |
122 | 125 |
123 // Lost context occurred due to internal implementation reasons. | 126 // Lost context occurred due to internal implementation reasons. |
124 SyntheticLostContext, | 127 SyntheticLostContext, |
125 }; | 128 }; |
126 virtual void loseContext(LostContextMode) {} | 129 virtual void loseContext(LostContextMode) {} |
127 | 130 |
| 131 // WebThread::TaskObserver implementation |
| 132 void didProcessTask() override; |
| 133 void willProcessTask() final {} |
| 134 |
128 // Canvas2D-specific interface | 135 // Canvas2D-specific interface |
129 virtual bool is2d() const { return false; } | 136 virtual bool is2d() const { return false; } |
130 virtual void restoreCanvasMatrixClipStack(SkCanvas*) const {} | 137 virtual void restoreCanvasMatrixClipStack(SkCanvas*) const {} |
131 virtual void reset() {} | 138 virtual void reset() {} |
132 virtual void clearRect(double x, double y, double width, double height) {} | 139 virtual void clearRect(double x, double y, double width, double height) {} |
133 virtual void didSetSurfaceSize() {} | 140 virtual void didSetSurfaceSize() {} |
134 virtual void setShouldAntialias(bool) {} | 141 virtual void setShouldAntialias(bool) {} |
135 virtual unsigned hitRegionsCount() const { return 0; } | 142 virtual unsigned hitRegionsCount() const { return 0; } |
136 virtual void setFont(const String&) {} | 143 virtual void setFont(const String&) {} |
137 virtual void styleDidChange(const ComputedStyle* oldStyle, | 144 virtual void styleDidChange(const ComputedStyle* oldStyle, |
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186 | 193 |
187 private: | 194 private: |
188 void dispose(); | 195 void dispose(); |
189 | 196 |
190 Member<HTMLCanvasElement> m_canvas; | 197 Member<HTMLCanvasElement> m_canvas; |
191 Member<OffscreenCanvas> m_offscreenCanvas; | 198 Member<OffscreenCanvas> m_offscreenCanvas; |
192 HashSet<String> m_cleanURLs; | 199 HashSet<String> m_cleanURLs; |
193 HashSet<String> m_dirtyURLs; | 200 HashSet<String> m_dirtyURLs; |
194 CanvasColorSpace m_colorSpace; | 201 CanvasColorSpace m_colorSpace; |
195 CanvasContextCreationAttributes m_creationAttributes; | 202 CanvasContextCreationAttributes m_creationAttributes; |
| 203 bool m_finalizeFrameScheduled = false; |
196 }; | 204 }; |
197 | 205 |
198 } // namespace blink | 206 } // namespace blink |
199 | 207 |
200 #endif | 208 #endif |
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