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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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/offscreencanvas/OffscreenCanvas.h" | 5 #include "modules/offscreencanvas/OffscreenCanvas.h" |
6 | 6 |
7 #include "core/dom/ExceptionCode.h" | 7 #include "core/dom/ExceptionCode.h" |
8 #include "core/html/canvas/CanvasContextCreationAttributes.h" | 8 #include "core/html/canvas/CanvasContextCreationAttributes.h" |
9 #include "modules/offscreencanvas/OffscreenCanvasRenderingContext.h" | 9 #include "modules/offscreencanvas/OffscreenCanvasRenderingContext.h" |
10 #include "modules/offscreencanvas/OffscreenCanvasRenderingContextFactory.h" | 10 #include "modules/offscreencanvas/OffscreenCanvasRenderingContextFactory.h" |
11 #include "modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h" | 11 #include "modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h" |
12 #include "wtf/MathExtras.h" | 12 #include "wtf/MathExtras.h" |
13 | 13 |
14 namespace blink { | 14 namespace blink { |
15 | 15 |
16 OffscreenCanvas::OffscreenCanvas(const IntSize& size) | 16 OffscreenCanvas::OffscreenCanvas(const IntSize& size) |
17 : m_size(size) | 17 : m_canvasId(-1) // DOMNodeIds starts from 0, using -1 to indicate no associ ated canvas element. |
18 , m_size(size) | |
18 { } | 19 { } |
19 | 20 |
20 OffscreenCanvas::~OffscreenCanvas() | 21 OffscreenCanvas::~OffscreenCanvas() |
21 { } | 22 { } |
22 | 23 |
23 OffscreenCanvas* OffscreenCanvas::create(unsigned width, unsigned height) | 24 OffscreenCanvas* OffscreenCanvas::create(unsigned width, unsigned height) |
24 { | 25 { |
25 return new OffscreenCanvas(IntSize(clampTo<int>(width), clampTo<int>(height) )); | 26 return new OffscreenCanvas(IntSize(clampTo<int>(width), clampTo<int>(height) )); |
26 } | 27 } |
27 | 28 |
28 void OffscreenCanvas::setWidth(unsigned width) | 29 void OffscreenCanvas::setWidth(unsigned width) |
29 { | 30 { |
30 m_size.setWidth(clampTo<int>(width)); | 31 m_size.setWidth(clampTo<int>(width)); |
31 } | 32 } |
32 | 33 |
33 void OffscreenCanvas::setHeight(unsigned height) | 34 void OffscreenCanvas::setHeight(unsigned height) |
34 { | 35 { |
35 m_size.setHeight(clampTo<int>(height)); | 36 m_size.setHeight(clampTo<int>(height)); |
36 } | 37 } |
37 | 38 |
39 void OffscreenCanvas::setNeutered() | |
40 { | |
41 m_isNeutered = true; | |
Justin Novosad
2016/04/12 18:10:23
Add "ASSERT(!m_context);"
xidachen
2016/04/12 19:35:14
Done.
| |
42 m_size.setWidth(0); | |
Justin Novosad
2016/04/12 18:10:23
Why do we need to reset m_size? This has observabl
xidachen
2016/04/12 19:35:14
When an offscreenCanvas gets transferred to worker
| |
43 m_size.setHeight(0); | |
44 } | |
45 | |
38 OffscreenCanvasRenderingContext2D* OffscreenCanvas::getContext(const String& id, const CanvasContextCreationAttributes& attributes) | 46 OffscreenCanvasRenderingContext2D* OffscreenCanvas::getContext(const String& id, const CanvasContextCreationAttributes& attributes) |
Justin Novosad
2016/04/12 18:10:23
This method need to throw an InvalidStateError exc
xidachen
2016/04/12 19:35:14
Done.
| |
39 { | 47 { |
40 OffscreenCanvasRenderingContext::ContextType contextType = OffscreenCanvasRe nderingContext::contextTypeFromId(id); | 48 OffscreenCanvasRenderingContext::ContextType contextType = OffscreenCanvasRe nderingContext::contextTypeFromId(id); |
41 | 49 |
42 // Unknown type. | 50 // Unknown type. |
43 if (contextType == OffscreenCanvasRenderingContext::ContextTypeCount) | 51 if (contextType == OffscreenCanvasRenderingContext::ContextTypeCount) |
44 return nullptr; | 52 return nullptr; |
45 | 53 |
46 OffscreenCanvasRenderingContextFactory* factory = getRenderingContextFactory (contextType); | 54 OffscreenCanvasRenderingContextFactory* factory = getRenderingContextFactory (contextType); |
47 if (!factory) | 55 if (!factory) |
48 return nullptr; | 56 return nullptr; |
49 | 57 |
50 if (m_context) { | 58 if (m_context) { |
51 if (m_context->getContextType() != contextType) { | 59 if (m_context->getContextType() != contextType) { |
52 factory->onError(this, "OffscreenCanvas has an existing context of a different type"); | 60 factory->onError(this, "OffscreenCanvas has an existing context of a different type"); |
53 return nullptr; | 61 return nullptr; |
54 } | 62 } |
55 } else { | 63 } else { |
56 m_context = factory->create(this, attributes); | 64 m_context = factory->create(this, attributes); |
57 } | 65 } |
58 | 66 |
59 // TODO: When there're more than one context type implemented in the future, | 67 // TODO: When there're more than one context type implemented in the future, |
60 // the return type here should be changed to base class of all Offscreen | 68 // the return type here should be changed to base class of all Offscreen |
61 // context types. | 69 // context types. |
62 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); | 70 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); |
63 } | 71 } |
64 | 72 |
65 ImageBitmap* OffscreenCanvas::transferToImageBitmap(ExceptionState& exceptionSta te) | 73 ImageBitmap* OffscreenCanvas::transferToImageBitmap(ExceptionState& exceptionSta te) |
Justin Novosad
2016/04/12 18:10:23
Same here: throw if neutered + test.
xidachen
2016/04/12 19:35:14
Done.
| |
66 { | 74 { |
67 if (!m_context) { | 75 if (!m_context) { |
68 exceptionState.throwDOMException(InvalidStateError, "Cannot transfer an ImageBitmap from an OffscreenCanvas with no context"); | 76 exceptionState.throwDOMException(InvalidStateError, "Cannot transfer an ImageBitmap from an OffscreenCanvas with no context"); |
69 return nullptr; | 77 return nullptr; |
70 } | 78 } |
71 ImageBitmap* image = m_context->transferToImageBitmap(exceptionState); | 79 ImageBitmap* image = m_context->transferToImageBitmap(exceptionState); |
72 if (!image) { | 80 if (!image) { |
73 // Undocumented exception (not in spec) | 81 // Undocumented exception (not in spec) |
74 exceptionState.throwDOMException(V8GeneralError, "Out of memory"); | 82 exceptionState.throwDOMException(V8GeneralError, "Out of memory"); |
75 } | 83 } |
76 return image; | 84 return image; |
77 } | 85 } |
78 | 86 |
79 OffscreenCanvasRenderingContext2D* OffscreenCanvas::renderingContext() const | 87 OffscreenCanvasRenderingContext2D* OffscreenCanvas::renderingContext() const |
Justin Novosad
2016/04/12 18:10:23
ASSERT(!m_isNeutered);
xidachen
2016/04/12 19:35:14
Done.
| |
80 { | 88 { |
81 // TODO: When there're more than one context type implemented in the future, | 89 // TODO: When there're more than one context type implemented in the future, |
82 // the return type here should be changed to base class of all Offscreen | 90 // the return type here should be changed to base class of all Offscreen |
83 // context types. | 91 // context types. |
84 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); | 92 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); |
85 } | 93 } |
86 | 94 |
87 OffscreenCanvas::ContextFactoryVector& OffscreenCanvas::renderingContextFactorie s() | 95 OffscreenCanvas::ContextFactoryVector& OffscreenCanvas::renderingContextFactorie s() |
88 { | 96 { |
89 DEFINE_STATIC_LOCAL(ContextFactoryVector, s_contextFactories, (OffscreenCanv asRenderingContext::ContextTypeCount)); | 97 DEFINE_STATIC_LOCAL(ContextFactoryVector, s_contextFactories, (OffscreenCanv asRenderingContext::ContextTypeCount)); |
(...skipping 10 matching lines...) Expand all Loading... | |
100 { | 108 { |
101 OffscreenCanvasRenderingContext::ContextType type = renderingContextFactory- >getContextType(); | 109 OffscreenCanvasRenderingContext::ContextType type = renderingContextFactory- >getContextType(); |
102 ASSERT(type < OffscreenCanvasRenderingContext::ContextTypeCount); | 110 ASSERT(type < OffscreenCanvasRenderingContext::ContextTypeCount); |
103 ASSERT(!renderingContextFactories()[type]); | 111 ASSERT(!renderingContextFactories()[type]); |
104 renderingContextFactories()[type] = renderingContextFactory; | 112 renderingContextFactories()[type] = renderingContextFactory; |
105 } | 113 } |
106 | 114 |
107 DEFINE_TRACE(OffscreenCanvas) | 115 DEFINE_TRACE(OffscreenCanvas) |
108 { | 116 { |
109 visitor->trace(m_context); | 117 visitor->trace(m_context); |
110 visitor->trace(m_canvas); | |
111 } | 118 } |
112 | 119 |
113 } // namespace blink | 120 } // namespace blink |
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