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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" |
11 | 11 |
12 namespace blink { | 12 namespace blink { |
13 | 13 |
14 void HTMLCanvasElementModule::getContext(HTMLCanvasElement& canvas, const String
& type, const CanvasContextCreationAttributes& attributes, RenderingContext& res
ult) | 14 void HTMLCanvasElementModule::getContext(HTMLCanvasElement& canvas, const String
& type, const CanvasContextCreationAttributes& attributes, ExceptionState& excep
tionState, RenderingContext& result) |
15 { | 15 { |
| 16 if (canvas.surfaceLayerBridge()) { |
| 17 // The existence of canvas surfaceLayerBridge indicates that HTMLCanvasE
lement.transferControlToOffscreen() has been called. |
| 18 exceptionState.throwDOMException(InvalidStateError, "Cannot get context
from a canvas that has transferred its control to offscreen."); |
| 19 return; |
| 20 } |
| 21 |
16 CanvasRenderingContext* context = canvas.getCanvasRenderingContext(type, att
ributes); | 22 CanvasRenderingContext* context = canvas.getCanvasRenderingContext(type, att
ributes); |
17 if (context) { | 23 if (context) { |
18 context->setCanvasGetContextResult(result); | 24 context->setCanvasGetContextResult(result); |
19 } | 25 } |
20 } | 26 } |
21 | 27 |
22 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen(HTMLCanvasE
lement& canvas, ExceptionState& exceptionState) | 28 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen(HTMLCanvasE
lement& canvas, ExceptionState& exceptionState) |
23 { | 29 { |
24 if (!canvas.createSurfaceLayer()) { | 30 if (!canvas.createSurfaceLayer()) { |
25 exceptionState.throwDOMException(V8Error, "Offscreen canvas creation fai
led due to an internal timeout."); | 31 exceptionState.throwDOMException(V8Error, "Offscreen canvas creation fai
led due to an internal timeout."); |
(...skipping 15 matching lines...) Expand all Loading... |
41 CanvasSurfaceLayerBridge* bridge = canvas.surfaceLayerBridge(); | 47 CanvasSurfaceLayerBridge* bridge = canvas.surfaceLayerBridge(); |
42 if (bridge) { | 48 if (bridge) { |
43 // If a bridge exists, it means canvas.createSurfaceLayer() has been cal
led | 49 // If a bridge exists, it means canvas.createSurfaceLayer() has been cal
led |
44 // and its SurfaceId has been populated as well. | 50 // and its SurfaceId has been populated as well. |
45 offscreenCanvas->setSurfaceId(bridge->getSurfaceId().client_id(), bridge
->getSurfaceId().local_id(), bridge->getSurfaceId().nonce()); | 51 offscreenCanvas->setSurfaceId(bridge->getSurfaceId().client_id(), bridge
->getSurfaceId().local_id(), bridge->getSurfaceId().nonce()); |
46 } | 52 } |
47 return offscreenCanvas; | 53 return offscreenCanvas; |
48 } | 54 } |
49 | 55 |
50 } | 56 } |
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