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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" | |
13 #include "wtf/MathExtras.h" | 12 #include "wtf/MathExtras.h" |
14 #include <memory> | 13 #include <memory> |
15 | 14 |
16 namespace blink { | 15 namespace blink { |
17 | 16 |
18 OffscreenCanvas::OffscreenCanvas(const IntSize& size) | 17 OffscreenCanvas::OffscreenCanvas(const IntSize& size) |
19 : m_size(size) | 18 : m_size(size) |
20 , m_originClean(true) | 19 , m_originClean(true) |
21 { | 20 { |
22 } | 21 } |
23 | 22 |
24 OffscreenCanvas* OffscreenCanvas::create(unsigned width, unsigned height) | 23 OffscreenCanvas* OffscreenCanvas::create(unsigned width, unsigned height) |
25 { | 24 { |
26 return new OffscreenCanvas(IntSize(clampTo<int>(width), clampTo<int>(height)
)); | 25 return new OffscreenCanvas(IntSize(clampTo<int>(width), clampTo<int>(height)
)); |
27 } | 26 } |
28 | 27 |
29 void OffscreenCanvas::setWidth(unsigned width) | 28 void OffscreenCanvas::setWidth(unsigned width) |
30 { | 29 { |
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; | |
35 m_size.setWidth(clampTo<int>(width)); | 30 m_size.setWidth(clampTo<int>(width)); |
36 } | 31 } |
37 | 32 |
38 void OffscreenCanvas::setHeight(unsigned height) | 33 void OffscreenCanvas::setHeight(unsigned height) |
39 { | 34 { |
40 // Same comment as above. | |
41 if (m_canvasId >= 0) | |
42 return; | |
43 m_size.setHeight(clampTo<int>(height)); | 35 m_size.setHeight(clampTo<int>(height)); |
44 } | 36 } |
45 | 37 |
46 void OffscreenCanvas::setNeutered() | 38 void OffscreenCanvas::setNeutered() |
47 { | 39 { |
48 ASSERT(!m_context); | 40 ASSERT(!m_context); |
49 m_isNeutered = true; | 41 m_isNeutered = true; |
50 m_size.setWidth(0); | 42 m_size.setWidth(0); |
51 m_size.setHeight(0); | 43 m_size.setHeight(0); |
52 } | 44 } |
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135 return m_originClean && !m_disableReadingFromCanvas; | 127 return m_originClean && !m_disableReadingFromCanvas; |
136 } | 128 } |
137 | 129 |
138 bool OffscreenCanvas::isPaintable() const | 130 bool OffscreenCanvas::isPaintable() const |
139 { | 131 { |
140 if (!m_context) | 132 if (!m_context) |
141 return ImageBuffer::canCreateImageBuffer(m_size); | 133 return ImageBuffer::canCreateImageBuffer(m_size); |
142 return m_context->isPaintable(); | 134 return m_context->isPaintable(); |
143 } | 135 } |
144 | 136 |
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 | |
152 DEFINE_TRACE(OffscreenCanvas) | 137 DEFINE_TRACE(OffscreenCanvas) |
153 { | 138 { |
154 visitor->trace(m_context); | 139 visitor->trace(m_context); |
155 } | 140 } |
156 | 141 |
157 } // namespace blink | 142 } // namespace blink |
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