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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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37 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen( | 37 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen( |
38 HTMLCanvasElement& canvas, | 38 HTMLCanvasElement& canvas, |
39 ExceptionState& exceptionState) { | 39 ExceptionState& exceptionState) { |
40 if (canvas.surfaceLayerBridge()) { | 40 if (canvas.surfaceLayerBridge()) { |
41 exceptionState.throwDOMException( | 41 exceptionState.throwDOMException( |
42 InvalidStateError, | 42 InvalidStateError, |
43 "Cannot transfer control from a canvas for more than one time."); | 43 "Cannot transfer control from a canvas for more than one time."); |
44 return nullptr; | 44 return nullptr; |
45 } | 45 } |
46 | 46 |
47 if (!canvas.createSurfaceLayer()) { | 47 canvas.createLayer(); |
48 exceptionState.throwDOMException( | |
49 V8Error, | |
50 "Offscreen canvas creation failed due to an internal timeout."); | |
51 return nullptr; | |
52 } | |
53 | 48 |
54 return transferControlToOffscreenInternal(canvas, exceptionState); | 49 return transferControlToOffscreenInternal(canvas, exceptionState); |
55 } | 50 } |
56 | 51 |
57 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreenInternal( | 52 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreenInternal( |
58 HTMLCanvasElement& canvas, | 53 HTMLCanvasElement& canvas, |
59 ExceptionState& exceptionState) { | 54 ExceptionState& exceptionState) { |
60 if (canvas.renderingContext()) { | 55 if (canvas.renderingContext()) { |
61 exceptionState.throwDOMException( | 56 exceptionState.throwDOMException( |
62 InvalidStateError, | 57 InvalidStateError, |
63 "Cannot transfer control from a canvas that has a rendering context."); | 58 "Cannot transfer control from a canvas that has a rendering context."); |
64 return nullptr; | 59 return nullptr; |
65 } | 60 } |
66 OffscreenCanvas* offscreenCanvas = | 61 OffscreenCanvas* offscreenCanvas = |
67 OffscreenCanvas::create(canvas.width(), canvas.height()); | 62 OffscreenCanvas::create(canvas.width(), canvas.height()); |
68 | 63 |
69 int canvasId = DOMNodeIds::idForNode(&canvas); | 64 int canvasId = DOMNodeIds::idForNode(&canvas); |
70 offscreenCanvas->setPlaceholderCanvasId(canvasId); | 65 offscreenCanvas->setPlaceholderCanvasId(canvasId); |
71 canvas.registerPlaceholder(canvasId); | 66 canvas.registerPlaceholder(canvasId); |
72 | 67 |
73 CanvasSurfaceLayerBridge* bridge = canvas.surfaceLayerBridge(); | 68 CanvasSurfaceLayerBridge* bridge = canvas.surfaceLayerBridge(); |
74 if (bridge) { | 69 if (bridge) { |
75 // If a bridge exists, it means canvas.createSurfaceLayer() has been called | 70 offscreenCanvas->setFrameSinkId(bridge->getFrameSinkId().client_id(), |
76 // and its SurfaceId has been populated as well. | 71 bridge->getFrameSinkId().sink_id()); |
77 offscreenCanvas->setSurfaceId( | |
78 bridge->getSurfaceId().frame_sink_id().client_id(), | |
79 bridge->getSurfaceId().frame_sink_id().sink_id(), | |
80 bridge->getSurfaceId().local_frame_id().local_id(), | |
81 bridge->getSurfaceId() | |
82 .local_frame_id() | |
83 .nonce() | |
84 .GetHighForSerialization(), | |
85 bridge->getSurfaceId() | |
86 .local_frame_id() | |
87 .nonce() | |
88 .GetLowForSerialization()); | |
89 } | 72 } |
90 return offscreenCanvas; | 73 return offscreenCanvas; |
91 } | 74 } |
92 } | 75 } |
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