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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, ExceptionState& excep
tionState, RenderingContext& result) | 14 void HTMLCanvasElementModule::getContext(HTMLCanvasElement& canvas, const String
& type, const CanvasContextCreationAttributes& attributes, RenderingContext& res
ult) |
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 } | |
20 | |
21 CanvasRenderingContext* context = canvas.getCanvasRenderingContext(type, att
ributes); | 16 CanvasRenderingContext* context = canvas.getCanvasRenderingContext(type, att
ributes); |
22 if (context) { | 17 if (context) { |
23 context->setCanvasGetContextResult(result); | 18 context->setCanvasGetContextResult(result); |
24 } | 19 } |
25 } | 20 } |
26 | 21 |
27 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen(HTMLCanvasE
lement& canvas, ExceptionState& exceptionState) | 22 OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen(HTMLCanvasE
lement& canvas, ExceptionState& exceptionState) |
28 { | 23 { |
29 if (!canvas.createSurfaceLayer()) { | 24 if (!canvas.createSurfaceLayer()) { |
30 exceptionState.throwDOMException(V8Error, "Offscreen canvas creation fai
led due to an internal timeout."); | 25 exceptionState.throwDOMException(V8Error, "Offscreen canvas creation fai
led due to an internal timeout."); |
(...skipping 15 matching lines...) Expand all Loading... |
46 CanvasSurfaceLayerBridge* bridge = canvas.surfaceLayerBridge(); | 41 CanvasSurfaceLayerBridge* bridge = canvas.surfaceLayerBridge(); |
47 if (bridge) { | 42 if (bridge) { |
48 // If a bridge exists, it means canvas.createSurfaceLayer() has been cal
led | 43 // If a bridge exists, it means canvas.createSurfaceLayer() has been cal
led |
49 // and its SurfaceId has been populated as well. | 44 // and its SurfaceId has been populated as well. |
50 offscreenCanvas->setSurfaceId(bridge->getSurfaceId().client_id(), bridge
->getSurfaceId().local_id(), bridge->getSurfaceId().nonce()); | 45 offscreenCanvas->setSurfaceId(bridge->getSurfaceId().client_id(), bridge
->getSurfaceId().local_id(), bridge->getSurfaceId().nonce()); |
51 } | 46 } |
52 return offscreenCanvas; | 47 return offscreenCanvas; |
53 } | 48 } |
54 | 49 |
55 } | 50 } |
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