1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkNoSaveLayerCanvas_DEFINED 9 #define SkNoSaveLayerCanvas_DEFINED 10 11 #include "SkCanvas.h" 12 #include "SkRRect.h" 13 14 // The NoSaveLayerCanvas is used to play back SkPictures when the saveLayer 15 // functionality isn't required (e.g., during analysis of the draw calls). 16 // It also simplifies the clipping calls to only use rectangles. 17 class SK_API SkNoSaveLayerCanvas : public SkCanvas { 18 public: 19 SkNoSaveLayerCanvas(SkBaseDevice* device) : INHERITED(device) {} 20 21 protected: 22 virtual SaveLayerStrategy willSaveLayer(const SkRect* bounds, const SkPaint* paint, 23 SaveFlags flags) SK_OVERRIDE { 24 this->INHERITED::willSaveLayer(bounds, paint, flags); 25 return kNoLayer_SaveLayerStrategy; 26 } 27 28 // disable aa for speed 29 virtual void onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE { 30 this->INHERITED::onClipRect(rect, op, kHard_ClipEdgeStyle); 31 } 32 33 // for speed, just respect the bounds, and disable AA. May give us a few 34 // false positives and negatives. 35 virtual void onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE { 36 this->updateClipConservativelyUsingBounds(path.getBounds(), op, 37 path.isInverseFillType()); 38 } 39 virtual void onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE { 40 this->updateClipConservativelyUsingBounds(rrect.getBounds(), op, false); 41 } 42 43 private: 44 typedef SkCanvas INHERITED; 45 }; 46 47 #endif // SkNoSaveLayerCanvas_DEFINED 48
