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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "modules/canvas/HTMLCanvasElementModule.h" | 5 #include "modules/canvas/HTMLCanvasElementModule.h" |
6 | 6 |
7 #include "core/dom/DOMNodeIds.h" | 7 #include "core/dom/DOMNodeIds.h" |
8 #include "core/html/canvas/CanvasContextCreationAttributes.h" | 8 #include "core/html/canvas/CanvasContextCreationAttributes.h" |
9 #include "core/html/canvas/CanvasRenderingContext.h" | 9 #include "core/html/canvas/CanvasRenderingContext.h" |
10 #include "core/offscreencanvas/OffscreenCanvas.h" | 10 #include "core/offscreencanvas/OffscreenCanvas.h" |
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30 CanvasRenderingContext* context = | 30 CanvasRenderingContext* context = |
31 canvas.getCanvasRenderingContext(type, attributes); | 31 canvas.getCanvasRenderingContext(type, attributes); |
32 if (context) { | 32 if (context) { |
33 context->setCanvasGetContextResult(result); | 33 context->setCanvasGetContextResult(result); |
34 } | 34 } |
35 } | 35 } |
36 | 36 |
37 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen( | 37 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen( |
38 HTMLCanvasElement& canvas, | 38 HTMLCanvasElement& canvas, |
39 ExceptionState& exceptionState) { | 39 ExceptionState& exceptionState) { |
| 40 if (canvas.surfaceLayerBridge()) { |
| 41 exceptionState.throwDOMException( |
| 42 InvalidStateError, |
| 43 "Cannot transfer control from a canvas for more than one time."); |
| 44 return nullptr; |
| 45 } |
| 46 |
40 if (!canvas.createSurfaceLayer()) { | 47 if (!canvas.createSurfaceLayer()) { |
41 exceptionState.throwDOMException( | 48 exceptionState.throwDOMException( |
42 V8Error, | 49 V8Error, |
43 "Offscreen canvas creation failed due to an internal timeout."); | 50 "Offscreen canvas creation failed due to an internal timeout."); |
44 return nullptr; | 51 return nullptr; |
45 } | 52 } |
46 | 53 |
47 return transferControlToOffscreenInternal(canvas, exceptionState); | 54 return transferControlToOffscreenInternal(canvas, exceptionState); |
48 } | 55 } |
49 | 56 |
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66 // and its SurfaceId has been populated as well. | 73 // and its SurfaceId has been populated as well. |
67 offscreenCanvas->setSurfaceId( | 74 offscreenCanvas->setSurfaceId( |
68 bridge->getSurfaceId().frame_sink_id().client_id(), | 75 bridge->getSurfaceId().frame_sink_id().client_id(), |
69 bridge->getSurfaceId().frame_sink_id().sink_id(), | 76 bridge->getSurfaceId().frame_sink_id().sink_id(), |
70 bridge->getSurfaceId().local_frame_id().local_id(), | 77 bridge->getSurfaceId().local_frame_id().local_id(), |
71 bridge->getSurfaceId().local_frame_id().nonce()); | 78 bridge->getSurfaceId().local_frame_id().nonce()); |
72 } | 79 } |
73 return offscreenCanvas; | 80 return offscreenCanvas; |
74 } | 81 } |
75 } | 82 } |
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