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1 
2 /*
3  * Copyright 2011 Google Inc.
4  *
5  * Use of this source code is governed by a BSD-style license that can be
6  * found in the LICENSE file.
7  */
8 #include "SkNWayCanvas.h"
9 
SkNWayCanvas(int width,int height)10 SkNWayCanvas::SkNWayCanvas(int width, int height)
11         : INHERITED(width, height) {}
12 
~SkNWayCanvas()13 SkNWayCanvas::~SkNWayCanvas() {
14     this->removeAll();
15 }
16 
addCanvas(SkCanvas * canvas)17 void SkNWayCanvas::addCanvas(SkCanvas* canvas) {
18     if (canvas) {
19         canvas->ref();
20         *fList.append() = canvas;
21     }
22 }
23 
removeCanvas(SkCanvas * canvas)24 void SkNWayCanvas::removeCanvas(SkCanvas* canvas) {
25     int index = fList.find(canvas);
26     if (index >= 0) {
27         canvas->unref();
28         fList.removeShuffle(index);
29     }
30 }
31 
removeAll()32 void SkNWayCanvas::removeAll() {
33     fList.unrefAll();
34     fList.reset();
35 }
36 
37 ///////////////////////////////////////////////////////////////////////////
38 // These are forwarded to the N canvases we're referencing
39 
40 class SkNWayCanvas::Iter {
41 public:
Iter(const SkTDArray<SkCanvas * > & list)42     Iter(const SkTDArray<SkCanvas*>& list) : fList(list) {
43         fIndex = 0;
44     }
next()45     bool next() {
46         if (fIndex < fList.count()) {
47             fCanvas = fList[fIndex++];
48             return true;
49         }
50         return false;
51     }
operator ->()52     SkCanvas* operator->() { return fCanvas; }
53 
54 private:
55     const SkTDArray<SkCanvas*>& fList;
56     int fIndex;
57     SkCanvas* fCanvas;
58 };
59 
willSave()60 void SkNWayCanvas::willSave() {
61     Iter iter(fList);
62     while (iter.next()) {
63         iter->save();
64     }
65 
66     this->INHERITED::willSave();
67 }
68 
willSaveLayer(const SkRect * bounds,const SkPaint * paint,SaveFlags flags)69 SkCanvas::SaveLayerStrategy SkNWayCanvas::willSaveLayer(const SkRect* bounds, const SkPaint* paint,
70                                                         SaveFlags flags) {
71     Iter iter(fList);
72     while (iter.next()) {
73         iter->saveLayer(bounds, paint, flags);
74     }
75 
76     this->INHERITED::willSaveLayer(bounds, paint, flags);
77     // No need for a layer.
78     return kNoLayer_SaveLayerStrategy;
79 }
80 
willRestore()81 void SkNWayCanvas::willRestore() {
82     Iter iter(fList);
83     while (iter.next()) {
84         iter->restore();
85     }
86     this->INHERITED::willRestore();
87 }
88 
didConcat(const SkMatrix & matrix)89 void SkNWayCanvas::didConcat(const SkMatrix& matrix) {
90     Iter iter(fList);
91     while (iter.next()) {
92         iter->concat(matrix);
93     }
94     this->INHERITED::didConcat(matrix);
95 }
96 
didSetMatrix(const SkMatrix & matrix)97 void SkNWayCanvas::didSetMatrix(const SkMatrix& matrix) {
98     Iter iter(fList);
99     while (iter.next()) {
100         iter->setMatrix(matrix);
101     }
102     this->INHERITED::didSetMatrix(matrix);
103 }
104 
onClipRect(const SkRect & rect,SkRegion::Op op,ClipEdgeStyle edgeStyle)105 void SkNWayCanvas::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
106     Iter iter(fList);
107     while (iter.next()) {
108         iter->clipRect(rect, op, kSoft_ClipEdgeStyle == edgeStyle);
109     }
110     this->INHERITED::onClipRect(rect, op, edgeStyle);
111 }
112 
onClipRRect(const SkRRect & rrect,SkRegion::Op op,ClipEdgeStyle edgeStyle)113 void SkNWayCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
114     Iter iter(fList);
115     while (iter.next()) {
116         iter->clipRRect(rrect, op, kSoft_ClipEdgeStyle == edgeStyle);
117     }
118     this->INHERITED::onClipRRect(rrect, op, edgeStyle);
119 }
120 
onClipPath(const SkPath & path,SkRegion::Op op,ClipEdgeStyle edgeStyle)121 void SkNWayCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
122     Iter iter(fList);
123     while (iter.next()) {
124         iter->clipPath(path, op, kSoft_ClipEdgeStyle == edgeStyle);
125     }
126     this->INHERITED::onClipPath(path, op, edgeStyle);
127 }
128 
onClipRegion(const SkRegion & deviceRgn,SkRegion::Op op)129 void SkNWayCanvas::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
130     Iter iter(fList);
131     while (iter.next()) {
132         iter->clipRegion(deviceRgn, op);
133     }
134     this->INHERITED::onClipRegion(deviceRgn, op);
135 }
136 
clear(SkColor color)137 void SkNWayCanvas::clear(SkColor color) {
138     Iter iter(fList);
139     while (iter.next()) {
140         iter->clear(color);
141     }
142 }
143 
drawPaint(const SkPaint & paint)144 void SkNWayCanvas::drawPaint(const SkPaint& paint) {
145     Iter iter(fList);
146     while (iter.next()) {
147         iter->drawPaint(paint);
148     }
149 }
150 
drawPoints(PointMode mode,size_t count,const SkPoint pts[],const SkPaint & paint)151 void SkNWayCanvas::drawPoints(PointMode mode, size_t count, const SkPoint pts[],
152                         const SkPaint& paint) {
153     Iter iter(fList);
154     while (iter.next()) {
155         iter->drawPoints(mode, count, pts, paint);
156     }
157 }
158 
drawRect(const SkRect & rect,const SkPaint & paint)159 void SkNWayCanvas::drawRect(const SkRect& rect, const SkPaint& paint) {
160     Iter iter(fList);
161     while (iter.next()) {
162         iter->drawRect(rect, paint);
163     }
164 }
165 
drawOval(const SkRect & rect,const SkPaint & paint)166 void SkNWayCanvas::drawOval(const SkRect& rect, const SkPaint& paint) {
167     Iter iter(fList);
168     while (iter.next()) {
169         iter->drawOval(rect, paint);
170     }
171 }
172 
drawRRect(const SkRRect & rrect,const SkPaint & paint)173 void SkNWayCanvas::drawRRect(const SkRRect& rrect, const SkPaint& paint) {
174     Iter iter(fList);
175     while (iter.next()) {
176         iter->drawRRect(rrect, paint);
177     }
178 }
179 
onDrawDRRect(const SkRRect & outer,const SkRRect & inner,const SkPaint & paint)180 void SkNWayCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
181                                 const SkPaint& paint) {
182     Iter iter(fList);
183     while (iter.next()) {
184         iter->drawDRRect(outer, inner, paint);
185     }
186 }
187 
drawPath(const SkPath & path,const SkPaint & paint)188 void SkNWayCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
189     Iter iter(fList);
190     while (iter.next()) {
191         iter->drawPath(path, paint);
192     }
193 }
194 
drawBitmap(const SkBitmap & bitmap,SkScalar x,SkScalar y,const SkPaint * paint)195 void SkNWayCanvas::drawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y,
196                               const SkPaint* paint) {
197     Iter iter(fList);
198     while (iter.next()) {
199         iter->drawBitmap(bitmap, x, y, paint);
200     }
201 }
202 
drawBitmapRectToRect(const SkBitmap & bitmap,const SkRect * src,const SkRect & dst,const SkPaint * paint,DrawBitmapRectFlags flags)203 void SkNWayCanvas::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
204                                   const SkRect& dst, const SkPaint* paint,
205                                   DrawBitmapRectFlags flags) {
206     Iter iter(fList);
207     while (iter.next()) {
208         iter->drawBitmapRectToRect(bitmap, src, dst, paint, flags);
209     }
210 }
211 
drawBitmapMatrix(const SkBitmap & bitmap,const SkMatrix & m,const SkPaint * paint)212 void SkNWayCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m,
213                                     const SkPaint* paint) {
214     Iter iter(fList);
215     while (iter.next()) {
216         iter->drawBitmapMatrix(bitmap, m, paint);
217     }
218 }
219 
drawBitmapNine(const SkBitmap & bitmap,const SkIRect & center,const SkRect & dst,const SkPaint * paint)220 void SkNWayCanvas::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
221                                   const SkRect& dst, const SkPaint* paint) {
222     Iter iter(fList);
223     while (iter.next()) {
224         iter->drawBitmapNine(bitmap, center, dst, paint);
225     }
226 }
227 
drawSprite(const SkBitmap & bitmap,int x,int y,const SkPaint * paint)228 void SkNWayCanvas::drawSprite(const SkBitmap& bitmap, int x, int y,
229                               const SkPaint* paint) {
230     Iter iter(fList);
231     while (iter.next()) {
232         iter->drawSprite(bitmap, x, y, paint);
233     }
234 }
235 
onDrawText(const void * text,size_t byteLength,SkScalar x,SkScalar y,const SkPaint & paint)236 void SkNWayCanvas::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
237                               const SkPaint& paint) {
238     Iter iter(fList);
239     while (iter.next()) {
240         iter->drawText(text, byteLength, x, y, paint);
241     }
242 }
243 
onDrawPosText(const void * text,size_t byteLength,const SkPoint pos[],const SkPaint & paint)244 void SkNWayCanvas::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
245                                  const SkPaint& paint) {
246     Iter iter(fList);
247     while (iter.next()) {
248         iter->drawPosText(text, byteLength, pos, paint);
249     }
250 }
251 
onDrawPosTextH(const void * text,size_t byteLength,const SkScalar xpos[],SkScalar constY,const SkPaint & paint)252 void SkNWayCanvas::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
253                                   SkScalar constY, const SkPaint& paint) {
254     Iter iter(fList);
255     while (iter.next()) {
256         iter->drawPosTextH(text, byteLength, xpos, constY, paint);
257     }
258 }
259 
onDrawTextOnPath(const void * text,size_t byteLength,const SkPath & path,const SkMatrix * matrix,const SkPaint & paint)260 void SkNWayCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
261                                     const SkMatrix* matrix, const SkPaint& paint) {
262     Iter iter(fList);
263     while (iter.next()) {
264         iter->drawTextOnPath(text, byteLength, path, matrix, paint);
265     }
266 }
267 
onDrawTextBlob(const SkTextBlob * blob,SkScalar x,SkScalar y,const SkPaint & paint)268 void SkNWayCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
269                                   const SkPaint &paint) {
270     Iter iter(fList);
271     while (iter.next()) {
272         iter->drawTextBlob(blob, x, y, paint);
273     }
274 }
275 
onDrawPicture(const SkPicture * picture,const SkMatrix * matrix,const SkPaint * paint)276 void SkNWayCanvas::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix,
277                                  const SkPaint* paint) {
278     Iter iter(fList);
279     while (iter.next()) {
280         iter->drawPicture(picture, matrix, paint);
281     }
282 }
283 
drawVertices(VertexMode vmode,int vertexCount,const SkPoint vertices[],const SkPoint texs[],const SkColor colors[],SkXfermode * xmode,const uint16_t indices[],int indexCount,const SkPaint & paint)284 void SkNWayCanvas::drawVertices(VertexMode vmode, int vertexCount,
285                           const SkPoint vertices[], const SkPoint texs[],
286                           const SkColor colors[], SkXfermode* xmode,
287                           const uint16_t indices[], int indexCount,
288                           const SkPaint& paint) {
289     Iter iter(fList);
290     while (iter.next()) {
291         iter->drawVertices(vmode, vertexCount, vertices, texs, colors, xmode,
292                            indices, indexCount, paint);
293     }
294 }
295 
onDrawPatch(const SkPoint cubics[12],const SkColor colors[4],const SkPoint texCoords[4],SkXfermode * xmode,const SkPaint & paint)296 void SkNWayCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
297                                const SkPoint texCoords[4], SkXfermode* xmode,
298                                const SkPaint& paint) {
299     Iter iter(fList);
300     while (iter.next()) {
301         iter->drawPatch(cubics, colors, texCoords, xmode, paint);
302     }
303 }
304 
drawData(const void * data,size_t length)305 void SkNWayCanvas::drawData(const void* data, size_t length) {
306     Iter iter(fList);
307     while (iter.next()) {
308         iter->drawData(data, length);
309     }
310 }
311 
setDrawFilter(SkDrawFilter * filter)312 SkDrawFilter* SkNWayCanvas::setDrawFilter(SkDrawFilter* filter) {
313     Iter iter(fList);
314     while (iter.next()) {
315         iter->setDrawFilter(filter);
316     }
317     return this->INHERITED::setDrawFilter(filter);
318 }
319 
beginCommentGroup(const char * description)320 void SkNWayCanvas::beginCommentGroup(const char* description) {
321     Iter iter(fList);
322     while (iter.next()) {
323         iter->beginCommentGroup(description);
324     }
325 }
326 
addComment(const char * kywd,const char * value)327 void SkNWayCanvas::addComment(const char* kywd, const char* value) {
328     Iter iter(fList);
329     while (iter.next()) {
330         iter->addComment(kywd, value);
331     }
332 }
333 
endCommentGroup()334 void SkNWayCanvas::endCommentGroup() {
335     Iter iter(fList);
336     while (iter.next()) {
337         iter->endCommentGroup();
338     }
339 }
340