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1 /* | 1 /* |
2 * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved. |
3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> | 3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
4 * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved. | 4 * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved. |
5 * | 5 * |
6 * Redistribution and use in source and binary forms, with or without | 6 * Redistribution and use in source and binary forms, with or without |
7 * modification, are permitted provided that the following conditions | 7 * modification, are permitted provided that the following conditions |
8 * are met: | 8 * are met: |
9 * 1. Redistributions of source code must retain the above copyright | 9 * 1. Redistributions of source code must retain the above copyright |
10 * notice, this list of conditions and the following disclaimer. | 10 * notice, this list of conditions and the following disclaimer. |
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24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 */ | 26 */ |
27 | 27 |
28 #ifndef HTMLCanvasElement_h | 28 #ifndef HTMLCanvasElement_h |
29 #define HTMLCanvasElement_h | 29 #define HTMLCanvasElement_h |
30 | 30 |
31 #include "bindings/core/v8/ScriptValue.h" | 31 #include "bindings/core/v8/ScriptValue.h" |
32 #include "bindings/core/v8/UnionTypesCore.h" | 32 #include "bindings/core/v8/UnionTypesCore.h" |
33 #include "core/CoreExport.h" | 33 #include "core/CoreExport.h" |
| 34 #include "core/dom/DOMTypedArray.h" |
34 #include "core/dom/Document.h" | 35 #include "core/dom/Document.h" |
35 #include "core/dom/DocumentVisibilityObserver.h" | 36 #include "core/dom/DocumentVisibilityObserver.h" |
36 #include "core/fileapi/FileCallback.h" | 37 #include "core/fileapi/FileCallback.h" |
37 #include "core/html/HTMLElement.h" | 38 #include "core/html/HTMLElement.h" |
38 #include "core/html/canvas/CanvasImageSource.h" | 39 #include "core/html/canvas/CanvasImageSource.h" |
39 #include "platform/geometry/FloatRect.h" | 40 #include "platform/geometry/FloatRect.h" |
40 #include "platform/geometry/IntSize.h" | 41 #include "platform/geometry/IntSize.h" |
41 #include "platform/graphics/GraphicsTypes.h" | 42 #include "platform/graphics/GraphicsTypes.h" |
42 #include "platform/graphics/GraphicsTypes3D.h" | 43 #include "platform/graphics/GraphicsTypes3D.h" |
43 #include "platform/graphics/ImageBufferClient.h" | 44 #include "platform/graphics/ImageBufferClient.h" |
44 #include "platform/heap/Handle.h" | 45 #include "platform/heap/Handle.h" |
| 46 #include "public/platform/WebThread.h" |
45 | 47 |
46 #define CanvasDefaultInterpolationQuality InterpolationLow | 48 #define CanvasDefaultInterpolationQuality InterpolationLow |
47 | 49 |
48 namespace blink { | 50 namespace blink { |
49 | 51 |
50 class AffineTransform; | 52 class AffineTransform; |
51 class CanvasContextCreationAttributes; | 53 class CanvasContextCreationAttributes; |
52 class CanvasRenderingContext; | 54 class CanvasRenderingContext; |
53 class CanvasRenderingContextFactory; | 55 class CanvasRenderingContextFactory; |
54 class GraphicsContext; | 56 class GraphicsContext; |
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71 DEFINE_INLINE_VIRTUAL_TRACE() { } | 73 DEFINE_INLINE_VIRTUAL_TRACE() { } |
72 }; | 74 }; |
73 | 75 |
74 class CORE_EXPORT HTMLCanvasElement final : public HTMLElement, public DocumentV
isibilityObserver, public CanvasImageSource, public ImageBufferClient { | 76 class CORE_EXPORT HTMLCanvasElement final : public HTMLElement, public DocumentV
isibilityObserver, public CanvasImageSource, public ImageBufferClient { |
75 DEFINE_WRAPPERTYPEINFO(); | 77 DEFINE_WRAPPERTYPEINFO(); |
76 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLCanvasElement); | 78 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLCanvasElement); |
77 public: | 79 public: |
78 DECLARE_NODE_FACTORY(HTMLCanvasElement); | 80 DECLARE_NODE_FACTORY(HTMLCanvasElement); |
79 ~HTMLCanvasElement() override; | 81 ~HTMLCanvasElement() override; |
80 | 82 |
| 83 static WebThread* getToBlobThreadInstance(); |
| 84 |
81 void addObserver(CanvasObserver*); | 85 void addObserver(CanvasObserver*); |
82 void removeObserver(CanvasObserver*); | 86 void removeObserver(CanvasObserver*); |
83 | 87 |
84 // Attributes and functions exposed to script | 88 // Attributes and functions exposed to script |
85 int width() const { return size().width(); } | 89 int width() const { return size().width(); } |
86 int height() const { return size().height(); } | 90 int height() const { return size().height(); } |
87 | 91 |
88 const IntSize& size() const { return m_size; } | 92 const IntSize& size() const { return m_size; } |
89 | 93 |
90 void setWidth(int); | 94 void setWidth(int); |
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107 ScriptValue getContext(ScriptState*, const String&, const CanvasContextCreat
ionAttributes&); | 111 ScriptValue getContext(ScriptState*, const String&, const CanvasContextCreat
ionAttributes&); |
108 // Called by Document::getCSSCanvasContext as well as above getContext(). | 112 // Called by Document::getCSSCanvasContext as well as above getContext(). |
109 CanvasRenderingContext* getCanvasRenderingContext(const String&, const Canva
sContextCreationAttributes&); | 113 CanvasRenderingContext* getCanvasRenderingContext(const String&, const Canva
sContextCreationAttributes&); |
110 | 114 |
111 bool isPaintable() const; | 115 bool isPaintable() const; |
112 | 116 |
113 static String toEncodingMimeType(const String& mimeType); | 117 static String toEncodingMimeType(const String& mimeType); |
114 String toDataURL(const String& mimeType, const ScriptValue& qualityArgument,
ExceptionState&) const; | 118 String toDataURL(const String& mimeType, const ScriptValue& qualityArgument,
ExceptionState&) const; |
115 String toDataURL(const String& mimeType, ExceptionState& exceptionState) con
st { return toDataURL(mimeType, ScriptValue(), exceptionState); } | 119 String toDataURL(const String& mimeType, ExceptionState& exceptionState) con
st { return toDataURL(mimeType, ScriptValue(), exceptionState); } |
116 | 120 |
117 void toBlob(FileCallback*, const String& mimeType, const ScriptValue& qualit
yArgument, ExceptionState&) const; | 121 void toBlob(FileCallback*, const String& mimeType, const ScriptValue& qualit
yArgument, ExceptionState&); |
118 void toBlob(FileCallback* callback, const String& mimeType, ExceptionState&
exceptionState) { return toBlob(callback, mimeType, ScriptValue(), exceptionStat
e); } | 122 void toBlob(FileCallback* callback, const String& mimeType, ExceptionState&
exceptionState) { return toBlob(callback, mimeType, ScriptValue(), exceptionStat
e); } |
119 | 123 |
120 // Used for rendering | 124 // Used for rendering |
121 void didDraw(const FloatRect&); | 125 void didDraw(const FloatRect&); |
122 void notifyObserversCanvasChanged(const FloatRect&); | 126 void notifyObserversCanvasChanged(const FloatRect&); |
123 | 127 |
124 void paint(GraphicsContext*, const LayoutRect&); | 128 void paint(GraphicsContext*, const LayoutRect&); |
125 | 129 |
126 SkCanvas* drawingCanvas() const; | 130 SkCanvas* drawingCanvas() const; |
127 void disableDeferral() const; | 131 void disableDeferral() const; |
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204 PassOwnPtr<ImageBufferSurface> createImageBufferSurface(const IntSize& devic
eSize, int* msaaSampleCount); | 208 PassOwnPtr<ImageBufferSurface> createImageBufferSurface(const IntSize& devic
eSize, int* msaaSampleCount); |
205 void createImageBuffer(); | 209 void createImageBuffer(); |
206 void createImageBufferInternal(PassOwnPtr<ImageBufferSurface> externalSurfac
e); | 210 void createImageBufferInternal(PassOwnPtr<ImageBufferSurface> externalSurfac
e); |
207 bool shouldUseDisplayList(const IntSize& deviceSize); | 211 bool shouldUseDisplayList(const IntSize& deviceSize); |
208 | 212 |
209 void setSurfaceSize(const IntSize&); | 213 void setSurfaceSize(const IntSize&); |
210 | 214 |
211 bool paintsIntoCanvasBuffer() const; | 215 bool paintsIntoCanvasBuffer() const; |
212 | 216 |
213 ImageData* toImageData(SourceDrawingBuffer) const; | 217 ImageData* toImageData(SourceDrawingBuffer) const; |
214 String toDataURLInternal(const String& mimeType, const double* quality, Sour
ceDrawingBuffer) const; | 218 String toDataURLInternal(const String& mimeType, const double& quality, Sour
ceDrawingBuffer) const; |
| 219 |
| 220 static void encodeImageAsync(DOMUint8ClampedArray* imagedata, IntSize imageS
ize, FileCallback*, const String& mimeType, double quality); |
| 221 static void createBlobAndCall(PassOwnPtr<Vector<char>> encodedImage, const S
tring& mimeType, FileCallback*); |
215 | 222 |
216 WillBeHeapHashSet<RawPtrWillBeWeakMember<CanvasObserver>> m_observers; | 223 WillBeHeapHashSet<RawPtrWillBeWeakMember<CanvasObserver>> m_observers; |
217 | 224 |
218 IntSize m_size; | 225 IntSize m_size; |
219 | 226 |
220 OwnPtrWillBeMember<CanvasRenderingContext> m_context; | 227 OwnPtrWillBeMember<CanvasRenderingContext> m_context; |
221 | 228 |
222 bool m_ignoreReset; | 229 bool m_ignoreReset; |
223 bool m_accelerationDisabled; | 230 bool m_accelerationDisabled; |
224 FloatRect m_dirtyRect; | 231 FloatRect m_dirtyRect; |
225 | 232 |
226 mutable intptr_t m_externallyAllocatedMemory; | 233 mutable intptr_t m_externallyAllocatedMemory; |
227 | 234 |
228 bool m_originClean; | 235 bool m_originClean; |
229 | 236 |
230 // It prevents HTMLCanvasElement::buffer() from continuously re-attempting t
o allocate an imageBuffer | 237 // It prevents HTMLCanvasElement::buffer() from continuously re-attempting t
o allocate an imageBuffer |
231 // after the first attempt failed. | 238 // after the first attempt failed. |
232 mutable bool m_didFailToCreateImageBuffer; | 239 mutable bool m_didFailToCreateImageBuffer; |
233 bool m_imageBufferIsClear; | 240 bool m_imageBufferIsClear; |
234 OwnPtr<ImageBuffer> m_imageBuffer; | 241 OwnPtr<ImageBuffer> m_imageBuffer; |
235 | 242 |
236 mutable RefPtr<Image> m_copiedImage; // FIXME: This is temporary for platfor
ms that have to copy the image buffer to render (and for CSSCanvasValue). | 243 mutable RefPtr<Image> m_copiedImage; // FIXME: This is temporary for platfor
ms that have to copy the image buffer to render (and for CSSCanvasValue). |
237 }; | 244 }; |
238 | 245 |
239 } // namespace blink | 246 } // namespace blink |
240 | 247 |
241 #endif // HTMLCanvasElement_h | 248 #endif // HTMLCanvasElement_h |
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