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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 "core/offscreencanvas/OffscreenCanvas.h" | 5 #include "core/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 "core/html/canvas/CanvasRenderingContext.h" | 9 #include "core/html/canvas/CanvasRenderingContext.h" |
10 #include "core/html/canvas/CanvasRenderingContextFactory.h" | 10 #include "core/html/canvas/CanvasRenderingContextFactory.h" |
11 #include "platform/graphics/ImageBuffer.h" | 11 #include "platform/graphics/ImageBuffer.h" |
| 12 #include "platform/graphics/OffscreenCanvasFrameDispatcherImpl.h" |
12 #include "wtf/MathExtras.h" | 13 #include "wtf/MathExtras.h" |
13 #include <memory> | 14 #include <memory> |
14 | 15 |
15 namespace blink { | 16 namespace blink { |
16 | 17 |
17 OffscreenCanvas::OffscreenCanvas(const IntSize& size) | 18 OffscreenCanvas::OffscreenCanvas(const IntSize& size) |
18 : m_size(size) | 19 : m_size(size) |
19 , m_originClean(true) | 20 , m_originClean(true) |
20 { | 21 { |
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 { |
| 31 // If this OffscreenCanvas is transferred control by an html canvas, |
| 32 // its size is determined by html canvas's size and cannot be resized. |
| 33 if (m_canvasId >= 0) |
| 34 return; |
30 m_size.setWidth(clampTo<int>(width)); | 35 m_size.setWidth(clampTo<int>(width)); |
31 } | 36 } |
32 | 37 |
33 void OffscreenCanvas::setHeight(unsigned height) | 38 void OffscreenCanvas::setHeight(unsigned height) |
34 { | 39 { |
| 40 // Same comment as above. |
| 41 if (m_canvasId >= 0) |
| 42 return; |
35 m_size.setHeight(clampTo<int>(height)); | 43 m_size.setHeight(clampTo<int>(height)); |
36 } | 44 } |
37 | 45 |
38 void OffscreenCanvas::setNeutered() | 46 void OffscreenCanvas::setNeutered() |
39 { | 47 { |
40 ASSERT(!m_context); | 48 ASSERT(!m_context); |
41 m_isNeutered = true; | 49 m_isNeutered = true; |
42 m_size.setWidth(0); | 50 m_size.setWidth(0); |
43 m_size.setHeight(0); | 51 m_size.setHeight(0); |
44 } | 52 } |
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127 return m_originClean && !m_disableReadingFromCanvas; | 135 return m_originClean && !m_disableReadingFromCanvas; |
128 } | 136 } |
129 | 137 |
130 bool OffscreenCanvas::isPaintable() const | 138 bool OffscreenCanvas::isPaintable() const |
131 { | 139 { |
132 if (!m_context) | 140 if (!m_context) |
133 return ImageBuffer::canCreateImageBuffer(m_size); | 141 return ImageBuffer::canCreateImageBuffer(m_size); |
134 return m_context->isPaintable(); | 142 return m_context->isPaintable(); |
135 } | 143 } |
136 | 144 |
| 145 OffscreenCanvasFrameDispatcher* OffscreenCanvas::getOrCreateFrameDispatcher() |
| 146 { |
| 147 if (!m_frameDispatcher) |
| 148 m_frameDispatcher = wrapUnique(new OffscreenCanvasFrameDispatcherImpl(m_
clientId, m_localId, m_nonce, width(), height())); |
| 149 return m_frameDispatcher.get(); |
| 150 } |
| 151 |
137 DEFINE_TRACE(OffscreenCanvas) | 152 DEFINE_TRACE(OffscreenCanvas) |
138 { | 153 { |
139 visitor->trace(m_context); | 154 visitor->trace(m_context); |
140 } | 155 } |
141 | 156 |
142 } // namespace blink | 157 } // namespace blink |
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