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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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22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 */ | 24 */ |
25 | 25 |
26 #include "core/html/canvas/CanvasRenderingContext.h" | 26 #include "core/html/canvas/CanvasRenderingContext.h" |
27 | 27 |
28 #include "core/html/canvas/CanvasContextCreationAttributes.h" | 28 #include "core/html/canvas/CanvasContextCreationAttributes.h" |
29 #include "core/html/canvas/CanvasImageSource.h" | 29 #include "core/html/canvas/CanvasImageSource.h" |
30 #include "platform/RuntimeEnabledFeatures.h" | 30 #include "platform/RuntimeEnabledFeatures.h" |
31 #include "platform/weborigin/SecurityOrigin.h" | 31 #include "platform/weborigin/SecurityOrigin.h" |
| 32 #include "public/platform/Platform.h" |
32 | 33 |
33 constexpr const char* kLegacyCanvasColorSpaceName = "legacy-srgb"; | 34 constexpr const char* kLegacyCanvasColorSpaceName = "legacy-srgb"; |
34 constexpr const char* kSRGBCanvasColorSpaceName = "srgb"; | 35 constexpr const char* kSRGBCanvasColorSpaceName = "srgb"; |
35 constexpr const char* kLinearRGBCanvasColorSpaceName = "linear-rgb"; | 36 constexpr const char* kLinearRGBCanvasColorSpaceName = "linear-rgb"; |
36 constexpr const char* kRec2020CanvasColorSpaceName = "rec-2020"; | 37 constexpr const char* kRec2020CanvasColorSpaceName = "rec-2020"; |
37 constexpr const char* kP3CanvasColorSpaceName = "p3"; | 38 constexpr const char* kP3CanvasColorSpaceName = "p3"; |
38 | 39 |
39 namespace blink { | 40 namespace blink { |
40 | 41 |
41 CanvasRenderingContext::CanvasRenderingContext( | 42 CanvasRenderingContext::CanvasRenderingContext( |
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140 case kLinearRGBCanvasColorSpace: | 141 case kLinearRGBCanvasColorSpace: |
141 case kRec2020CanvasColorSpace: | 142 case kRec2020CanvasColorSpace: |
142 case kP3CanvasColorSpace: | 143 case kP3CanvasColorSpace: |
143 return kRGBA_F16_SkColorType; | 144 return kRGBA_F16_SkColorType; |
144 default: | 145 default: |
145 return kN32_SkColorType; | 146 return kN32_SkColorType; |
146 } | 147 } |
147 } | 148 } |
148 | 149 |
149 void CanvasRenderingContext::dispose() { | 150 void CanvasRenderingContext::dispose() { |
| 151 if (m_finalizeFrameScheduled) { |
| 152 Platform::current()->currentThread()->removeTaskObserver(this); |
| 153 } |
| 154 |
150 // HTMLCanvasElement and CanvasRenderingContext have a circular reference. | 155 // HTMLCanvasElement and CanvasRenderingContext have a circular reference. |
151 // When the pair is no longer reachable, their destruction order is non- | 156 // When the pair is no longer reachable, their destruction order is non- |
152 // deterministic, so the first of the two to be destroyed needs to notify | 157 // deterministic, so the first of the two to be destroyed needs to notify |
153 // the other in order to break the circular reference. This is to avoid | 158 // the other in order to break the circular reference. This is to avoid |
154 // an error when CanvasRenderingContext2D::didProcessTask() is invoked | 159 // an error when CanvasRenderingContext::didProcessTask() is invoked |
155 // after the HTMLCanvasElement is destroyed. | 160 // after the HTMLCanvasElement is destroyed. |
156 if (canvas()) { | 161 if (canvas()) { |
157 canvas()->detachContext(); | 162 canvas()->detachContext(); |
158 m_canvas = nullptr; | 163 m_canvas = nullptr; |
159 } | 164 } |
160 if (offscreenCanvas()) { | 165 if (offscreenCanvas()) { |
161 offscreenCanvas()->detachContext(); | 166 offscreenCanvas()->detachContext(); |
162 m_offscreenCanvas = nullptr; | 167 m_offscreenCanvas = nullptr; |
163 } | 168 } |
164 } | 169 } |
165 | 170 |
| 171 void CanvasRenderingContext::didDraw(const SkIRect& dirtyRect) { |
| 172 canvas()->didDraw(SkRect::Make(dirtyRect)); |
| 173 if (!m_finalizeFrameScheduled) { |
| 174 m_finalizeFrameScheduled = true; |
| 175 Platform::current()->currentThread()->addTaskObserver(this); |
| 176 } |
| 177 } |
| 178 |
| 179 void CanvasRenderingContext::didProcessTask() { |
| 180 Platform::current()->currentThread()->removeTaskObserver(this); |
| 181 m_finalizeFrameScheduled = false; |
| 182 |
| 183 if (!canvas()) |
| 184 return; |
| 185 |
| 186 // The end of a script task that drew content to the canvas is the point |
| 187 // at which the current frame may be considered complete. |
| 188 canvas()->finalizeFrame(); |
| 189 } |
| 190 |
166 CanvasRenderingContext::ContextType CanvasRenderingContext::contextTypeFromId( | 191 CanvasRenderingContext::ContextType CanvasRenderingContext::contextTypeFromId( |
167 const String& id) { | 192 const String& id) { |
168 if (id == "2d") | 193 if (id == "2d") |
169 return Context2d; | 194 return Context2d; |
170 if (id == "experimental-webgl") | 195 if (id == "experimental-webgl") |
171 return ContextExperimentalWebgl; | 196 return ContextExperimentalWebgl; |
172 if (id == "webgl") | 197 if (id == "webgl") |
173 return ContextWebgl; | 198 return ContextWebgl; |
174 if (id == "webgl2") | 199 if (id == "webgl2") |
175 return ContextWebgl2; | 200 return ContextWebgl2; |
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216 } | 241 } |
217 return taintOrigin; | 242 return taintOrigin; |
218 } | 243 } |
219 | 244 |
220 DEFINE_TRACE(CanvasRenderingContext) { | 245 DEFINE_TRACE(CanvasRenderingContext) { |
221 visitor->trace(m_canvas); | 246 visitor->trace(m_canvas); |
222 visitor->trace(m_offscreenCanvas); | 247 visitor->trace(m_offscreenCanvas); |
223 } | 248 } |
224 | 249 |
225 } // namespace blink | 250 } // namespace blink |
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