1 2 /* 3 * Copyright 2012 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 9 10 #ifndef SKDEBUGCANVAS_H_ 11 #define SKDEBUGCANVAS_H_ 12 13 #include "SkCanvas.h" 14 #include "SkDrawCommand.h" 15 #include "SkPathOps.h" 16 #include "SkPicture.h" 17 #include "SkTArray.h" 18 #include "SkString.h" 19 20 class SkTexOverrideFilter; 21 22 class SK_API SkDebugCanvas : public SkCanvas { 23 public: 24 SkDebugCanvas(int width, int height); 25 virtual ~SkDebugCanvas(); 26 27 void toggleFilter(bool toggle) { fFilter = toggle; } 28 29 void setMegaVizMode(bool megaVizMode) { fMegaVizMode = megaVizMode; } 30 bool getMegaVizMode() const { return fMegaVizMode; } 31 32 /** 33 * Enable or disable overdraw visualization 34 */ 35 void setOverdrawViz(bool overdrawViz) { fOverdrawViz = overdrawViz; } 36 bool getOverdrawViz() const { return fOverdrawViz; } 37 38 void setOutstandingSaveCount(int saveCount) { fOutstandingSaveCount = saveCount; } 39 int getOutstandingSaveCount() const { return fOutstandingSaveCount; } 40 41 bool getAllowSimplifyClip() const { return fAllowSimplifyClip; } 42 43 void setPicture(SkPicture* picture) { fPicture = picture; } 44 45 /** 46 * Enable or disable texure filtering override 47 */ 48 void overrideTexFiltering(bool overrideTexFiltering, SkPaint::FilterLevel level); 49 50 /** 51 Executes all draw calls to the canvas. 52 @param canvas The canvas being drawn to 53 */ 54 void draw(SkCanvas* canvas); 55 56 /** 57 Executes the draw calls up to the specified index. 58 @param canvas The canvas being drawn to 59 @param index The index of the final command being executed 60 */ 61 void drawTo(SkCanvas* canvas, int index); 62 63 /** 64 Returns the most recently calculated transformation matrix 65 */ 66 const SkMatrix& getCurrentMatrix() { 67 return fMatrix; 68 } 69 70 /** 71 Returns the most recently calculated clip 72 */ 73 const SkIRect& getCurrentClip() { 74 return fClip; 75 } 76 77 /** 78 Returns the index of the last draw command to write to the pixel at (x,y) 79 */ 80 int getCommandAtPoint(int x, int y, int index); 81 82 /** 83 Removes the command at the specified index 84 @param index The index of the command to delete 85 */ 86 void deleteDrawCommandAt(int index); 87 88 /** 89 Returns the draw command at the given index. 90 @param index The index of the command 91 */ 92 SkDrawCommand* getDrawCommandAt(int index); 93 94 /** 95 Sets the draw command for a given index. 96 @param index The index to overwrite 97 @param command The new command 98 */ 99 void setDrawCommandAt(int index, SkDrawCommand* command); 100 101 /** 102 Returns information about the command at the given index. 103 @param index The index of the command 104 */ 105 SkTDArray<SkString*>* getCommandInfo(int index); 106 107 /** 108 Returns the visibility of the command at the given index. 109 @param index The index of the command 110 */ 111 bool getDrawCommandVisibilityAt(int index); 112 113 /** 114 Returns the vector of draw commands 115 */ 116 SK_ATTR_DEPRECATED("please use getDrawCommandAt and getSize instead") 117 const SkTDArray<SkDrawCommand*>& getDrawCommands() const; 118 119 /** 120 Returns the vector of draw commands. Do not use this entry 121 point - it is going away! 122 */ 123 SkTDArray<SkDrawCommand*>& getDrawCommands(); 124 125 /** 126 * Returns the string vector of draw commands 127 */ 128 SkTArray<SkString>* getDrawCommandsAsStrings() const; 129 130 /** 131 * Returns an array containing an offset (in the SkPicture) for each command 132 */ 133 SkTDArray<size_t>* getDrawCommandOffsets() const; 134 135 /** 136 Returns length of draw command vector. 137 */ 138 int getSize() const { 139 return fCommandVector.count(); 140 } 141 142 /** 143 Toggles the visibility / execution of the draw command at index i with 144 the value of toggle. 145 */ 146 void toggleCommand(int index, bool toggle); 147 148 void setBounds(int width, int height) { 149 fWidth = width; 150 fHeight = height; 151 } 152 153 void setUserMatrix(SkMatrix matrix) { 154 fUserMatrix = matrix; 155 } 156 157 SkString clipStackData() const { return fClipStackData; } 158 159 //////////////////////////////////////////////////////////////////////////////// 160 // Inherited from SkCanvas 161 //////////////////////////////////////////////////////////////////////////////// 162 163 virtual void clear(SkColor) SK_OVERRIDE; 164 165 virtual void drawBitmap(const SkBitmap&, SkScalar left, SkScalar top, 166 const SkPaint*) SK_OVERRIDE; 167 168 virtual void drawBitmapRectToRect(const SkBitmap&, const SkRect* src, 169 const SkRect& dst, const SkPaint* paint, 170 DrawBitmapRectFlags flags) SK_OVERRIDE; 171 172 virtual void drawBitmapMatrix(const SkBitmap&, const SkMatrix&, 173 const SkPaint*) SK_OVERRIDE; 174 175 virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, 176 const SkRect& dst, const SkPaint*) SK_OVERRIDE; 177 178 virtual void drawData(const void*, size_t) SK_OVERRIDE; 179 180 virtual void beginCommentGroup(const char* description) SK_OVERRIDE; 181 182 virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE; 183 184 virtual void endCommentGroup() SK_OVERRIDE; 185 186 virtual void drawOval(const SkRect& oval, const SkPaint&) SK_OVERRIDE; 187 188 virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE; 189 190 virtual void drawPath(const SkPath& path, const SkPaint&) SK_OVERRIDE; 191 192 virtual void drawPoints(PointMode, size_t count, const SkPoint pts[], 193 const SkPaint&) SK_OVERRIDE; 194 195 virtual void drawRect(const SkRect& rect, const SkPaint&) SK_OVERRIDE; 196 197 virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE; 198 199 virtual void drawSprite(const SkBitmap&, int left, int top, 200 const SkPaint*) SK_OVERRIDE; 201 202 virtual void drawVertices(VertexMode, int vertexCount, 203 const SkPoint vertices[], const SkPoint texs[], 204 const SkColor colors[], SkXfermode*, 205 const uint16_t indices[], int indexCount, 206 const SkPaint&) SK_OVERRIDE; 207 208 static const int kVizImageHeight = 256; 209 static const int kVizImageWidth = 256; 210 211 virtual bool isClipEmpty() const SK_OVERRIDE { return false; } 212 virtual bool isClipRect() const SK_OVERRIDE { return true; } 213 #ifdef SK_SUPPORT_LEGACY_GETCLIPTYPE 214 virtual ClipType getClipType() const SK_OVERRIDE { 215 return kRect_ClipType; 216 } 217 #endif 218 virtual bool getClipBounds(SkRect* bounds) const SK_OVERRIDE { 219 if (NULL != bounds) { 220 bounds->setXYWH(0, 0, 221 SkIntToScalar(this->imageInfo().fWidth), 222 SkIntToScalar(this->imageInfo().fHeight)); 223 } 224 return true; 225 } 226 virtual bool getClipDeviceBounds(SkIRect* bounds) const SK_OVERRIDE { 227 if (NULL != bounds) { 228 bounds->setLargest(); 229 } 230 return true; 231 } 232 233 protected: 234 virtual void willSave(SaveFlags) SK_OVERRIDE; 235 virtual SaveLayerStrategy willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK_OVERRIDE; 236 virtual void willRestore() SK_OVERRIDE; 237 238 virtual void didConcat(const SkMatrix&) SK_OVERRIDE; 239 virtual void didSetMatrix(const SkMatrix&) SK_OVERRIDE; 240 241 virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE; 242 virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y, 243 const SkPaint&) SK_OVERRIDE; 244 virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[], 245 const SkPaint&) SK_OVERRIDE; 246 virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[], 247 SkScalar constY, const SkPaint&) SK_OVERRIDE; 248 virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path, 249 const SkMatrix* matrix, const SkPaint&) SK_OVERRIDE; 250 virtual void onPushCull(const SkRect& cullRect) SK_OVERRIDE; 251 virtual void onPopCull() SK_OVERRIDE; 252 253 virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE; 254 virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE; 255 virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE; 256 virtual void onClipRegion(const SkRegion& region, SkRegion::Op) SK_OVERRIDE; 257 258 virtual void onDrawPicture(const SkPicture* picture) SK_OVERRIDE; 259 260 void markActiveCommands(int index); 261 262 private: 263 SkTDArray<SkDrawCommand*> fCommandVector; 264 SkPicture* fPicture; 265 int fWidth; 266 int fHeight; 267 bool fFilter; 268 bool fMegaVizMode; 269 int fIndex; 270 SkMatrix fUserMatrix; 271 SkMatrix fMatrix; 272 SkIRect fClip; 273 274 SkString fClipStackData; 275 bool fCalledAddStackData; 276 SkPath fSaveDevPath; 277 278 bool fOverdrawViz; 279 SkDrawFilter* fOverdrawFilter; 280 281 bool fOverrideTexFiltering; 282 SkTexOverrideFilter* fTexOverrideFilter; 283 284 /** 285 Number of unmatched save() calls at any point during a draw. 286 If there are any saveLayer() calls outstanding, we need to resolve 287 all of them, which in practice means resolving all save() calls, 288 to avoid corruption of our canvas. 289 */ 290 int fOutstandingSaveCount; 291 292 /** 293 The active saveLayer commands at a given point in the renderering. 294 Only used when "mega" visualization is enabled. 295 */ 296 SkTDArray<SkDrawCommand*> fActiveLayers; 297 298 /** 299 The active cull commands at a given point in the rendering. 300 Only used when "mega" visualization is enabled. 301 */ 302 SkTDArray<SkDrawCommand*> fActiveCulls; 303 304 /** 305 Adds the command to the classes vector of commands. 306 @param command The draw command for execution 307 */ 308 void addDrawCommand(SkDrawCommand* command); 309 310 /** 311 Applies any panning and zooming the user has specified before 312 drawing anything else into the canvas. 313 */ 314 void applyUserTransform(SkCanvas* canvas); 315 316 size_t getOpID() const { 317 if (NULL != fPicture) { 318 return fPicture->EXPERIMENTAL_curOpID(); 319 } 320 return 0; 321 } 322 323 void resetClipStackData() { fClipStackData.reset(); fCalledAddStackData = false; } 324 325 void addClipStackData(const SkPath& devPath, const SkPath& operand, SkRegion::Op elementOp); 326 void addPathData(const SkPath& path, const char* pathName); 327 bool lastClipStackData(const SkPath& devPath); 328 void outputConicPoints(const SkPoint* pts, SkScalar weight); 329 void outputPoints(const SkPoint* pts, int count); 330 void outputPointsCommon(const SkPoint* pts, int count); 331 void outputScalar(SkScalar num); 332 333 typedef SkCanvas INHERITED; 334 }; 335 336 #endif 337
