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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012 Apple Inc. All rights reserv
ed. | 2 * Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012 Apple Inc. All rights reserv
ed. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
(...skipping 15 matching lines...) Expand all Loading... |
26 #ifndef CanvasRenderingContext2D_h | 26 #ifndef CanvasRenderingContext2D_h |
27 #define CanvasRenderingContext2D_h | 27 #define CanvasRenderingContext2D_h |
28 | 28 |
29 #include "bindings/core/v8/ScriptWrappable.h" | 29 #include "bindings/core/v8/ScriptWrappable.h" |
30 #include "bindings/modules/v8/UnionTypesModules.h" | 30 #include "bindings/modules/v8/UnionTypesModules.h" |
31 #include "core/html/canvas/CanvasContextCreationAttributes.h" | 31 #include "core/html/canvas/CanvasContextCreationAttributes.h" |
32 #include "core/html/canvas/CanvasRenderingContext.h" | 32 #include "core/html/canvas/CanvasRenderingContext.h" |
33 #include "core/html/canvas/CanvasRenderingContextFactory.h" | 33 #include "core/html/canvas/CanvasRenderingContextFactory.h" |
34 #include "core/svg/SVGResourceClient.h" | 34 #include "core/svg/SVGResourceClient.h" |
35 #include "modules/ModulesExport.h" | 35 #include "modules/ModulesExport.h" |
| 36 #include "modules/canvas2d/BaseRenderingContext2D.h" |
36 #include "modules/canvas2d/Canvas2DContextAttributes.h" | 37 #include "modules/canvas2d/Canvas2DContextAttributes.h" |
37 #include "modules/canvas2d/CanvasPathMethods.h" | |
38 #include "modules/canvas2d/CanvasRenderingContext2DState.h" | 38 #include "modules/canvas2d/CanvasRenderingContext2DState.h" |
39 #include "platform/graphics/GraphicsTypes.h" | 39 #include "platform/graphics/GraphicsTypes.h" |
40 #include "platform/heap/GarbageCollected.h" | 40 #include "platform/heap/GarbageCollected.h" |
41 #include "public/platform/WebThread.h" | 41 #include "public/platform/WebThread.h" |
42 #include "wtf/Vector.h" | 42 #include "wtf/Vector.h" |
43 #include "wtf/text/WTFString.h" | 43 #include "wtf/text/WTFString.h" |
44 | 44 |
45 namespace blink { class WebLayer; } | 45 namespace blink { class WebLayer; } |
46 | 46 |
47 namespace blink { | 47 namespace blink { |
48 | 48 |
49 class CanvasImageSource; | 49 class CanvasImageSource; |
50 class Element; | 50 class Element; |
51 class ExceptionState; | 51 class ExceptionState; |
52 class FloatRect; | 52 class FloatRect; |
53 class FloatSize; | 53 class FloatSize; |
54 class Font; | 54 class Font; |
55 class FontMetrics; | 55 class FontMetrics; |
56 class HitRegion; | 56 class HitRegion; |
57 class HitRegionOptions; | 57 class HitRegionOptions; |
58 class HitRegionManager; | 58 class HitRegionManager; |
59 class ImageData; | |
60 class Path2D; | 59 class Path2D; |
61 class SVGMatrixTearOff; | 60 class SVGMatrixTearOff; |
62 class TextMetrics; | 61 class TextMetrics; |
63 | 62 |
64 typedef HTMLImageElementOrHTMLVideoElementOrHTMLCanvasElementOrImageBitmap Canva
sImageSourceUnion; | 63 typedef HTMLImageElementOrHTMLVideoElementOrHTMLCanvasElementOrImageBitmap Canva
sImageSourceUnion; |
65 | 64 |
66 class MODULES_EXPORT CanvasRenderingContext2D final : public CanvasRenderingCont
ext, public CanvasPathMethods, public WebThread::TaskObserver, public SVGResourc
eClient { | 65 class MODULES_EXPORT CanvasRenderingContext2D final : public CanvasRenderingCont
ext, public BaseRenderingContext2D, public WebThread::TaskObserver, public SVGRe
sourceClient { |
67 DEFINE_WRAPPERTYPEINFO(); | 66 DEFINE_WRAPPERTYPEINFO(); |
| 67 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(CanvasRenderingContext2D); |
68 WILL_BE_USING_PRE_FINALIZER(CanvasRenderingContext2D, dispose); | 68 WILL_BE_USING_PRE_FINALIZER(CanvasRenderingContext2D, dispose); |
69 public: | 69 public: |
70 class Factory : public CanvasRenderingContextFactory { | 70 class Factory : public CanvasRenderingContextFactory { |
71 WTF_MAKE_NONCOPYABLE(Factory); | 71 WTF_MAKE_NONCOPYABLE(Factory); |
72 public: | 72 public: |
73 Factory() {} | 73 Factory() {} |
74 ~Factory() override {} | 74 ~Factory() override {} |
75 | 75 |
76 PassOwnPtrWillBeRawPtr<CanvasRenderingContext> create(HTMLCanvasElement*
canvas, const CanvasContextCreationAttributes& attrs, Document& document) overr
ide | 76 PassOwnPtrWillBeRawPtr<CanvasRenderingContext> create(HTMLCanvasElement*
canvas, const CanvasContextCreationAttributes& attrs, Document& document) overr
ide |
77 { | 77 { |
78 return adoptPtrWillBeNoop(new CanvasRenderingContext2D(canvas, attrs
, document)); | 78 return adoptPtrWillBeNoop(new CanvasRenderingContext2D(canvas, attrs
, document)); |
79 } | 79 } |
80 CanvasRenderingContext::ContextType contextType() const override { retur
n CanvasRenderingContext::Context2d; } | 80 CanvasRenderingContext::ContextType contextType() const override { retur
n CanvasRenderingContext::Context2d; } |
81 void onError(HTMLCanvasElement*, const String& error) override { } | 81 void onError(HTMLCanvasElement*, const String& error) override { } |
82 }; | 82 }; |
83 | 83 |
84 ~CanvasRenderingContext2D() override; | 84 ~CanvasRenderingContext2D() override; |
85 | 85 |
86 void strokeStyle(StringOrCanvasGradientOrCanvasPattern&) const; | |
87 void setStrokeStyle(const StringOrCanvasGradientOrCanvasPattern&); | |
88 | |
89 void fillStyle(StringOrCanvasGradientOrCanvasPattern&) const; | |
90 void setFillStyle(const StringOrCanvasGradientOrCanvasPattern&); | |
91 | |
92 double lineWidth() const; | |
93 void setLineWidth(double); | |
94 | |
95 String lineCap() const; | |
96 void setLineCap(const String&); | |
97 | |
98 String lineJoin() const; | |
99 void setLineJoin(const String&); | |
100 | |
101 double miterLimit() const; | |
102 void setMiterLimit(double); | |
103 | |
104 const Vector<double>& getLineDash() const; | |
105 void setLineDash(const Vector<double>&); | |
106 | |
107 double lineDashOffset() const; | |
108 void setLineDashOffset(double); | |
109 | |
110 double shadowOffsetX() const; | |
111 void setShadowOffsetX(double); | |
112 | |
113 double shadowOffsetY() const; | |
114 void setShadowOffsetY(double); | |
115 | |
116 double shadowBlur() const; | |
117 void setShadowBlur(double); | |
118 | |
119 String shadowColor() const; | |
120 void setShadowColor(const String&); | |
121 | |
122 double globalAlpha() const; | |
123 void setGlobalAlpha(double); | |
124 | |
125 bool isContextLost() const override; | 86 bool isContextLost() const override; |
126 | 87 |
127 bool shouldAntialias() const; | |
128 void setShouldAntialias(bool) override; | 88 void setShouldAntialias(bool) override; |
129 | 89 |
130 String globalCompositeOperation() const; | |
131 void setGlobalCompositeOperation(const String&); | |
132 | |
133 String filter() const; | |
134 void setFilter(const String&); | |
135 | |
136 void save(); | |
137 void restore(); | |
138 | |
139 PassRefPtrWillBeRawPtr<SVGMatrixTearOff> currentTransform() const; | |
140 void setCurrentTransform(PassRefPtrWillBeRawPtr<SVGMatrixTearOff>); | |
141 | |
142 void scale(double sx, double sy); | |
143 void rotate(double angleInRadians); | |
144 void translate(double tx, double ty); | |
145 void transform(double m11, double m12, double m21, double m22, double dx, do
uble dy); | |
146 void setTransform(double m11, double m12, double m21, double m22, double dx,
double dy); | |
147 void resetTransform(); | |
148 | |
149 void beginPath(); | |
150 | |
151 void fill(const String& winding = "nonzero"); | |
152 void fill(Path2D*, const String& winding = "nonzero"); | |
153 void stroke(); | |
154 void stroke(Path2D*); | |
155 void clip(const String& winding = "nonzero"); | |
156 void clip(Path2D*, const String& winding = "nonzero"); | |
157 | |
158 bool isPointInPath(const double x, const double y, const String& winding = "
nonzero"); | |
159 bool isPointInPath(Path2D*, const double x, const double y, const String& wi
nding = "nonzero"); | |
160 bool isPointInStroke(const double x, const double y); | |
161 bool isPointInStroke(Path2D*, const double x, const double y); | |
162 | |
163 void scrollPathIntoView(); | 90 void scrollPathIntoView(); |
164 void scrollPathIntoView(Path2D*); | 91 void scrollPathIntoView(Path2D*); |
165 | 92 |
166 void clearRect(double x, double y, double width, double height) override; | 93 void clearRect(double x, double y, double width, double height) override; |
167 void fillRect(double x, double y, double width, double height); | |
168 void strokeRect(double x, double y, double width, double height); | |
169 | |
170 void drawImage(const CanvasImageSourceUnion&, double x, double y, ExceptionS
tate&); | |
171 void drawImage(const CanvasImageSourceUnion&, double x, double y, double wid
th, double height, ExceptionState&); | |
172 void drawImage(const CanvasImageSourceUnion&, double sx, double sy, double s
w, double sh, double dx, double dy, double dw, double dh, ExceptionState&); | |
173 void drawImage(CanvasImageSource*, double sx, double sy, double sw, double s
h, double dx, double dy, double dw, double dh, ExceptionState&); | |
174 | |
175 CanvasGradient* createLinearGradient(double x0, double y0, double x1, double
y1); | |
176 CanvasGradient* createRadialGradient(double x0, double y0, double r0, double
x1, double y1, double r1, ExceptionState&); | |
177 CanvasPattern* createPattern(const CanvasImageSourceUnion&, const String& re
petitionType, ExceptionState&); | |
178 | |
179 ImageData* createImageData(ImageData*) const; | |
180 ImageData* createImageData(double width, double height, ExceptionState&) con
st; | |
181 ImageData* getImageData(double sx, double sy, double sw, double sh, Exceptio
nState&) const; | |
182 void putImageData(ImageData*, double dx, double dy, ExceptionState&); | |
183 void putImageData(ImageData*, double dx, double dy, double dirtyX, double di
rtyY, double dirtyWidth, double dirtyHeight, ExceptionState&); | |
184 | 94 |
185 void reset() override; | 95 void reset() override; |
186 | 96 |
187 String font() const; | 97 String font() const; |
188 void setFont(const String&) override; | 98 void setFont(const String&) override; |
189 | 99 |
190 String textAlign() const; | 100 String textAlign() const; |
191 void setTextAlign(const String&); | 101 void setTextAlign(const String&); |
192 | 102 |
193 String textBaseline() const; | 103 String textBaseline() const; |
194 void setTextBaseline(const String&); | 104 void setTextBaseline(const String&); |
195 | 105 |
196 String direction() const; | 106 String direction() const; |
197 void setDirection(const String&); | 107 void setDirection(const String&); |
198 | 108 |
199 void fillText(const String& text, double x, double y); | 109 void fillText(const String& text, double x, double y); |
200 void fillText(const String& text, double x, double y, double maxWidth); | 110 void fillText(const String& text, double x, double y, double maxWidth); |
201 void strokeText(const String& text, double x, double y); | 111 void strokeText(const String& text, double x, double y); |
202 void strokeText(const String& text, double x, double y, double maxWidth); | 112 void strokeText(const String& text, double x, double y, double maxWidth); |
203 TextMetrics* measureText(const String& text); | 113 TextMetrics* measureText(const String& text); |
204 | 114 |
205 bool imageSmoothingEnabled() const; | |
206 void setImageSmoothingEnabled(bool); | |
207 String imageSmoothingQuality() const; | |
208 void setImageSmoothingQuality(const String&); | |
209 | |
210 void getContextAttributes(Canvas2DContextAttributes&) const; | 115 void getContextAttributes(Canvas2DContextAttributes&) const; |
211 | 116 |
212 void drawFocusIfNeeded(Element*); | 117 void drawFocusIfNeeded(Element*); |
213 void drawFocusIfNeeded(Path2D*, Element*); | 118 void drawFocusIfNeeded(Path2D*, Element*); |
214 | 119 |
215 void addHitRegion(const HitRegionOptions&, ExceptionState&); | 120 void addHitRegion(const HitRegionOptions&, ExceptionState&); |
216 void removeHitRegion(const String& id); | 121 void removeHitRegion(const String& id); |
217 void clearHitRegions(); | 122 void clearHitRegions(); |
218 HitRegion* hitRegionAtPoint(const FloatPoint&); | 123 HitRegion* hitRegionAtPoint(const FloatPoint&); |
219 unsigned hitRegionsCount() const override; | 124 unsigned hitRegionsCount() const override; |
220 | 125 |
221 void loseContext(LostContextMode) override; | 126 void loseContext(LostContextMode) override; |
222 void didSetSurfaceSize() override; | 127 void didSetSurfaceSize() override; |
223 | 128 |
224 void restoreCanvasMatrixClipStack(SkCanvas*) const override; | 129 void restoreCanvasMatrixClipStack(SkCanvas*) const override; |
225 | 130 |
226 // TaskObserver implementation | 131 // TaskObserver implementation |
227 void didProcessTask() override; | 132 void didProcessTask() override; |
228 void willProcessTask() override { } | 133 void willProcessTask() override { } |
229 | 134 |
230 void styleDidChange(const ComputedStyle* oldStyle, const ComputedStyle& newS
tyle) override; | 135 void styleDidChange(const ComputedStyle* oldStyle, const ComputedStyle& newS
tyle) override; |
231 | 136 |
232 // SVGResourceClient implementation | 137 // SVGResourceClient implementation |
233 void filterNeedsInvalidation() override; | 138 void filterNeedsInvalidation() override; |
234 | 139 |
| 140 // BaseRenderingContext2D implementation |
| 141 bool originClean() const final; |
| 142 void setOriginTainted() final; |
| 143 bool wouldTaintOrigin(CanvasImageSource* source) final { return CanvasRender
ingContext::wouldTaintOrigin(source); } |
| 144 |
| 145 int width() const final; |
| 146 int height() const final; |
| 147 |
| 148 bool hasImageBuffer() const final; |
| 149 ImageBuffer* imageBuffer() const final; |
| 150 |
| 151 bool parseColorOrCurrentColor(Color&, const String& colorString) const final
; |
| 152 |
| 153 SkCanvas* drawingCanvas() const final; |
| 154 SkCanvas* existingDrawingCanvas() const final; |
| 155 void disableDeferral(DisableDeferralReason) final; |
| 156 |
| 157 AffineTransform baseTransform() const final; |
| 158 void didDraw(const SkIRect& dirtyRect) final; |
| 159 |
| 160 bool stateHasFilter() final; |
| 161 SkImageFilter* stateGetFilter() final; |
| 162 |
| 163 void validateStateStack() final; |
| 164 |
235 private: | 165 private: |
236 friend class CanvasRenderingContext2DAutoRestoreSkCanvas; | 166 friend class CanvasRenderingContext2DAutoRestoreSkCanvas; |
237 | 167 |
238 CanvasRenderingContext2D(HTMLCanvasElement*, const CanvasContextCreationAttr
ibutes& attrs, Document&); | 168 CanvasRenderingContext2D(HTMLCanvasElement*, const CanvasContextCreationAttr
ibutes& attrs, Document&); |
239 | 169 |
240 void dispose(); | 170 void dispose(); |
241 | 171 |
242 CanvasRenderingContext2DState& modifiableState(); | |
243 const CanvasRenderingContext2DState& state() const { return *m_stateStack.la
st(); } | |
244 | |
245 void setShadow(const FloatSize& offset, double blur, RGBA32 color); | |
246 | |
247 void dispatchContextLostEvent(Timer<CanvasRenderingContext2D>*); | 172 void dispatchContextLostEvent(Timer<CanvasRenderingContext2D>*); |
248 void dispatchContextRestoredEvent(Timer<CanvasRenderingContext2D>*); | 173 void dispatchContextRestoredEvent(Timer<CanvasRenderingContext2D>*); |
249 void tryRestoreContextEvent(Timer<CanvasRenderingContext2D>*); | 174 void tryRestoreContextEvent(Timer<CanvasRenderingContext2D>*); |
250 | 175 |
251 bool computeDirtyRect(const FloatRect& localBounds, SkIRect*); | |
252 bool computeDirtyRect(const FloatRect& localBounds, const SkIRect& transform
edClipBounds, SkIRect*); | |
253 void didDraw(const SkIRect&); | |
254 | |
255 SkCanvas* drawingCanvas() const; | |
256 | |
257 void unwindStateStack(); | 176 void unwindStateStack(); |
258 void realizeSaves(); | |
259 | 177 |
260 void pruneLocalFontCache(size_t targetSize); | 178 void pruneLocalFontCache(size_t targetSize); |
261 void schedulePruneLocalFontCacheIfNeeded(); | 179 void schedulePruneLocalFontCacheIfNeeded(); |
262 | 180 |
263 bool shouldDrawImageAntialiased(const FloatRect& destRect) const; | |
264 | |
265 template<typename DrawFunc, typename ContainsFunc> | |
266 bool draw(const DrawFunc&, const ContainsFunc&, const SkRect& bounds, Canvas
RenderingContext2DState::PaintType, CanvasRenderingContext2DState::ImageType = C
anvasRenderingContext2DState::NoImage); | |
267 void drawPathInternal(const Path&, CanvasRenderingContext2DState::PaintType,
SkPath::FillType = SkPath::kWinding_FillType); | |
268 void drawImageInternal(SkCanvas*, CanvasImageSource*, Image*, const FloatRec
t& srcRect, const FloatRect& dstRect, const SkPaint*); | |
269 void clipInternal(const Path&, const String& windingRuleString); | |
270 | |
271 bool isPointInPathInternal(const Path&, const double x, const double y, cons
t String& windingRuleString); | |
272 bool isPointInStrokeInternal(const Path&, const double x, const double y); | |
273 | |
274 void scrollPathIntoViewInternal(const Path&); | 181 void scrollPathIntoViewInternal(const Path&); |
275 | 182 |
276 void drawTextInternal(const String&, double x, double y, CanvasRenderingCont
ext2DState::PaintType, double* maxWidth = nullptr); | 183 void drawTextInternal(const String&, double x, double y, CanvasRenderingCont
ext2DState::PaintType, double* maxWidth = nullptr); |
277 | 184 |
278 const Font& accessFont(); | 185 const Font& accessFont(); |
279 int getFontBaseline(const FontMetrics&) const; | 186 int getFontBaseline(const FontMetrics&) const; |
280 | 187 |
281 void clearCanvas(); | |
282 bool rectContainsTransformedRect(const FloatRect&, const SkIRect&) const; | |
283 | |
284 void inflateStrokeRect(FloatRect&) const; | |
285 | |
286 template<typename DrawFunc> | |
287 void compositedDraw(const DrawFunc&, SkCanvas*, CanvasRenderingContext2DStat
e::PaintType, CanvasRenderingContext2DState::ImageType); | |
288 | |
289 void drawFocusIfNeededInternal(const Path&, Element*); | 188 void drawFocusIfNeededInternal(const Path&, Element*); |
290 bool focusRingCallIsValid(const Path&, Element*); | 189 bool focusRingCallIsValid(const Path&, Element*); |
291 void drawFocusRing(const Path&); | 190 void drawFocusRing(const Path&); |
292 void updateElementAccessibility(const Path&, Element*); | 191 void updateElementAccessibility(const Path&, Element*); |
293 | 192 |
294 void validateStateStack(); | |
295 | |
296 enum DrawType { | |
297 ClipFill, // Fill that is already known to cover the current clip | |
298 UntransformedUnclippedFill | |
299 }; | |
300 | |
301 void checkOverdraw(const SkRect&, const SkPaint*, CanvasRenderingContext2DSt
ate::ImageType, DrawType); | |
302 | |
303 CanvasRenderingContext::ContextType contextType() const override { return Ca
nvasRenderingContext::Context2d; } | 193 CanvasRenderingContext::ContextType contextType() const override { return Ca
nvasRenderingContext::Context2d; } |
304 bool is2d() const override { return true; } | 194 bool is2d() const override { return true; } |
305 bool isAccelerated() const override; | 195 bool isAccelerated() const override; |
306 bool hasAlpha() const override { return m_hasAlpha; } | 196 bool hasAlpha() const override { return m_hasAlpha; } |
307 void setIsHidden(bool) override; | 197 void setIsHidden(bool) override; |
308 void stop() final; | 198 void stop() final; |
309 DECLARE_VIRTUAL_TRACE(); | 199 DECLARE_VIRTUAL_TRACE(); |
310 | 200 |
311 virtual bool isTransformInvertible() const; | 201 virtual bool isTransformInvertible() const; |
312 | 202 |
313 WebLayer* platformLayer() const override; | 203 WebLayer* platformLayer() const override; |
314 | 204 |
315 WillBeHeapVector<OwnPtrWillBeMember<CanvasRenderingContext2DState>> m_stateS
tack; | |
316 PersistentWillBeMember<HitRegionManager> m_hitRegionManager; | 205 PersistentWillBeMember<HitRegionManager> m_hitRegionManager; |
317 AntiAliasingMode m_clipAntialiasing; | |
318 bool m_hasAlpha; | 206 bool m_hasAlpha; |
319 LostContextMode m_contextLostMode; | 207 LostContextMode m_contextLostMode; |
320 bool m_contextRestorable; | 208 bool m_contextRestorable; |
321 unsigned m_tryRestoreContextAttemptCount; | 209 unsigned m_tryRestoreContextAttemptCount; |
322 Timer<CanvasRenderingContext2D> m_dispatchContextLostEventTimer; | 210 Timer<CanvasRenderingContext2D> m_dispatchContextLostEventTimer; |
323 Timer<CanvasRenderingContext2D> m_dispatchContextRestoredEventTimer; | 211 Timer<CanvasRenderingContext2D> m_dispatchContextRestoredEventTimer; |
324 Timer<CanvasRenderingContext2D> m_tryRestoreContextEventTimer; | 212 Timer<CanvasRenderingContext2D> m_tryRestoreContextEventTimer; |
325 | 213 |
326 HashMap<String, Font> m_fontsResolvedUsingCurrentStyle; | 214 HashMap<String, Font> m_fontsResolvedUsingCurrentStyle; |
327 bool m_pruneLocalFontCacheScheduled; | 215 bool m_pruneLocalFontCacheScheduled; |
328 ListHashSet<String> m_fontLRUList; | 216 ListHashSet<String> m_fontLRUList; |
329 }; | 217 }; |
330 | 218 |
331 DEFINE_TYPE_CASTS(CanvasRenderingContext2D, CanvasRenderingContext, context, con
text->is2d(), context.is2d()); | 219 DEFINE_TYPE_CASTS(CanvasRenderingContext2D, CanvasRenderingContext, context, con
text->is2d(), context.is2d()); |
332 | 220 |
333 } // namespace blink | 221 } // namespace blink |
334 | 222 |
335 #endif // CanvasRenderingContext2D_h | 223 #endif // CanvasRenderingContext2D_h |
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