third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h - Issue 2255683005: Determine if OffscreenCanvas is paintable in different rendering contexts

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Issue 2255683005: Determine if OffscreenCanvas is paintable in different rendering contexts (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@Canvas2DTypecast

Patch Set: enum Created 4 years, 4 months ago

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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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74 virtual bool shouldAntialias() const { return false; }	74 virtual bool shouldAntialias() const { return false; }

75 virtual bool hasAlpha() const { return true; }	75 virtual bool hasAlpha() const { return true; }

76 virtual void setIsHidden(bool) = 0;	76 virtual void setIsHidden(bool) = 0;

77 virtual bool isContextLost() const { return true; }	77 virtual bool isContextLost() const { return true; }

78 virtual void setCanvasGetContextResult(RenderingContext&) { NOTREACHED(); };	78 virtual void setCanvasGetContextResult(RenderingContext&) { NOTREACHED(); };

79 virtual void setOffscreenCanvasGetContextResult(OffscreenRenderingContext&) { NOTREACHED(); }	79 virtual void setOffscreenCanvasGetContextResult(OffscreenRenderingContext&) { NOTREACHED(); }

80	80

81 // Return true if the content is updated.	81 // Return true if the content is updated.

82 virtual bool paintRenderingResultsToCanvas(SourceDrawingBuffer) { return fal se; }	82 virtual bool paintRenderingResultsToCanvas(SourceDrawingBuffer) { return fal se; }

83	83

	84 // Note: this function is strictly for OffscreenCanvas only.

	85 virtual bool isPaintable() const = 0;

	86

84 virtual WebLayer* platformLayer() const { return nullptr; }	87 virtual WebLayer* platformLayer() const { return nullptr; }

85	88

86 enum LostContextMode {	89 enum LostContextMode {

87 NotLostContext,	90 NotLostContext,

88	91

89 // Lost context occurred at the graphics system level.	92 // Lost context occurred at the graphics system level.

90 RealLostContext,	93 RealLostContext,

91	94

92 // Lost context provoked by WEBGL_lose_context.	95 // Lost context provoked by WEBGL_lose_context.

93 WebGLLoseContextLostContext,	96 WebGLLoseContextLostContext,

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143	146

144 Member<HTMLCanvasElement> m_canvas;	147 Member<HTMLCanvasElement> m_canvas;

145 Member<OffscreenCanvas> m_offscreenCanvas;	148 Member<OffscreenCanvas> m_offscreenCanvas;

146 HashSet<String> m_cleanURLs;	149 HashSet<String> m_cleanURLs;

147 HashSet<String> m_dirtyURLs;	150 HashSet<String> m_dirtyURLs;

148 };	151 };

149	152

150 } // namespace blink	153 } // namespace blink

151	154

152 #endif	155 #endif

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