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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" |
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28 void OffscreenCanvas::setWidth(unsigned width) | 28 void OffscreenCanvas::setWidth(unsigned width) |
29 { | 29 { |
30 m_size.setWidth(clampTo<int>(width)); | 30 m_size.setWidth(clampTo<int>(width)); |
31 } | 31 } |
32 | 32 |
33 void OffscreenCanvas::setHeight(unsigned height) | 33 void OffscreenCanvas::setHeight(unsigned height) |
34 { | 34 { |
35 m_size.setHeight(clampTo<int>(height)); | 35 m_size.setHeight(clampTo<int>(height)); |
36 } | 36 } |
37 | 37 |
38 void OffscreenCanvas::setNeutered() | 38 OffscreenCanvasRenderingContext2D* OffscreenCanvas::getContext(const String& id,
const CanvasContextCreationAttributes& attributes) |
39 { | 39 { |
40 ASSERT(!m_context); | |
41 m_isNeutered = true; | |
42 m_size.setWidth(0); | |
43 m_size.setHeight(0); | |
44 } | |
45 | |
46 OffscreenCanvasRenderingContext2D* OffscreenCanvas::getContext(const String& id,
const CanvasContextCreationAttributes& attributes, ExceptionState& exceptionSta
te) | |
47 { | |
48 if (m_isNeutered) { | |
49 exceptionState.throwDOMException(InvalidStateError, "Cannot get context
of a neutered OffscreenCanvas"); | |
50 return nullptr; | |
51 } | |
52 | |
53 OffscreenCanvasRenderingContext::ContextType contextType = OffscreenCanvasRe
nderingContext::contextTypeFromId(id); | 40 OffscreenCanvasRenderingContext::ContextType contextType = OffscreenCanvasRe
nderingContext::contextTypeFromId(id); |
54 | 41 |
55 // Unknown type. | 42 // Unknown type. |
56 if (contextType == OffscreenCanvasRenderingContext::ContextTypeCount) | 43 if (contextType == OffscreenCanvasRenderingContext::ContextTypeCount) |
57 return nullptr; | 44 return nullptr; |
58 | 45 |
59 OffscreenCanvasRenderingContextFactory* factory = getRenderingContextFactory
(contextType); | 46 OffscreenCanvasRenderingContextFactory* factory = getRenderingContextFactory
(contextType); |
60 if (!factory) | 47 if (!factory) |
61 return nullptr; | 48 return nullptr; |
62 | 49 |
63 if (m_context) { | 50 if (m_context) { |
64 if (m_context->getContextType() != contextType) { | 51 if (m_context->getContextType() != contextType) { |
65 factory->onError(this, "OffscreenCanvas has an existing context of a
different type"); | 52 factory->onError(this, "OffscreenCanvas has an existing context of a
different type"); |
66 return nullptr; | 53 return nullptr; |
67 } | 54 } |
68 } else { | 55 } else { |
69 m_context = factory->create(this, attributes); | 56 m_context = factory->create(this, attributes); |
70 } | 57 } |
71 | 58 |
72 // TODO: When there're more than one context type implemented in the future, | 59 // TODO: When there're more than one context type implemented in the future, |
73 // the return type here should be changed to base class of all Offscreen | 60 // the return type here should be changed to base class of all Offscreen |
74 // context types. | 61 // context types. |
75 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); | 62 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); |
76 } | 63 } |
77 | 64 |
78 ImageBitmap* OffscreenCanvas::transferToImageBitmap(ExceptionState& exceptionSta
te) | 65 ImageBitmap* OffscreenCanvas::transferToImageBitmap(ExceptionState& exceptionSta
te) |
79 { | 66 { |
80 if (m_isNeutered) { | |
81 exceptionState.throwDOMException(InvalidStateError, "Cannot transfer an
ImageBitmap from a neutered OffscreenCanvas"); | |
82 return nullptr; | |
83 } | |
84 if (!m_context) { | 67 if (!m_context) { |
85 exceptionState.throwDOMException(InvalidStateError, "Cannot transfer an
ImageBitmap from an OffscreenCanvas with no context"); | 68 exceptionState.throwDOMException(InvalidStateError, "Cannot transfer an
ImageBitmap from an OffscreenCanvas with no context"); |
86 return nullptr; | 69 return nullptr; |
87 } | 70 } |
88 ImageBitmap* image = m_context->transferToImageBitmap(exceptionState); | 71 ImageBitmap* image = m_context->transferToImageBitmap(exceptionState); |
89 if (!image) { | 72 if (!image) { |
90 // Undocumented exception (not in spec) | 73 // Undocumented exception (not in spec) |
91 exceptionState.throwDOMException(V8GeneralError, "Out of memory"); | 74 exceptionState.throwDOMException(V8GeneralError, "Out of memory"); |
92 } | 75 } |
93 return image; | 76 return image; |
94 } | 77 } |
95 | 78 |
96 OffscreenCanvasRenderingContext2D* OffscreenCanvas::renderingContext() const | 79 OffscreenCanvasRenderingContext2D* OffscreenCanvas::renderingContext() const |
97 { | 80 { |
98 ASSERT(!m_isNeutered); | |
99 // TODO: When there're more than one context type implemented in the future, | 81 // TODO: When there're more than one context type implemented in the future, |
100 // the return type here should be changed to base class of all Offscreen | 82 // the return type here should be changed to base class of all Offscreen |
101 // context types. | 83 // context types. |
102 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); | 84 return static_cast<OffscreenCanvasRenderingContext2D*>(m_context.get()); |
103 } | 85 } |
104 | 86 |
105 OffscreenCanvas::ContextFactoryVector& OffscreenCanvas::renderingContextFactorie
s() | 87 OffscreenCanvas::ContextFactoryVector& OffscreenCanvas::renderingContextFactorie
s() |
106 { | 88 { |
107 DEFINE_STATIC_LOCAL(ContextFactoryVector, s_contextFactories, (OffscreenCanv
asRenderingContext::ContextTypeCount)); | 89 DEFINE_STATIC_LOCAL(ContextFactoryVector, s_contextFactories, (OffscreenCanv
asRenderingContext::ContextTypeCount)); |
108 return s_contextFactories; | 90 return s_contextFactories; |
109 } | 91 } |
110 | 92 |
111 OffscreenCanvasRenderingContextFactory* OffscreenCanvas::getRenderingContextFact
ory(int type) | 93 OffscreenCanvasRenderingContextFactory* OffscreenCanvas::getRenderingContextFact
ory(int type) |
112 { | 94 { |
113 ASSERT(type < OffscreenCanvasRenderingContext::ContextTypeCount); | 95 ASSERT(type < OffscreenCanvasRenderingContext::ContextTypeCount); |
114 return renderingContextFactories()[type].get(); | 96 return renderingContextFactories()[type].get(); |
115 } | 97 } |
116 | 98 |
117 void OffscreenCanvas::registerRenderingContextFactory(PassOwnPtr<OffscreenCanvas
RenderingContextFactory> renderingContextFactory) | 99 void OffscreenCanvas::registerRenderingContextFactory(PassOwnPtr<OffscreenCanvas
RenderingContextFactory> renderingContextFactory) |
118 { | 100 { |
119 OffscreenCanvasRenderingContext::ContextType type = renderingContextFactory-
>getContextType(); | 101 OffscreenCanvasRenderingContext::ContextType type = renderingContextFactory-
>getContextType(); |
120 ASSERT(type < OffscreenCanvasRenderingContext::ContextTypeCount); | 102 ASSERT(type < OffscreenCanvasRenderingContext::ContextTypeCount); |
121 ASSERT(!renderingContextFactories()[type]); | 103 ASSERT(!renderingContextFactories()[type]); |
122 renderingContextFactories()[type] = renderingContextFactory; | 104 renderingContextFactories()[type] = renderingContextFactory; |
123 } | 105 } |
124 | 106 |
125 DEFINE_TRACE(OffscreenCanvas) | 107 DEFINE_TRACE(OffscreenCanvas) |
126 { | 108 { |
127 visitor->trace(m_context); | 109 visitor->trace(m_context); |
| 110 visitor->trace(m_canvas); |
128 } | 111 } |
129 | 112 |
130 } // namespace blink | 113 } // namespace blink |
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