1 /* 2 * Copyright 2016 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 SkNoDrawCanvas_DEFINED 9 #define SkNoDrawCanvas_DEFINED 10 11 #include "include/core/SkBlurTypes.h" 12 #include "include/core/SkCanvas.h" 13 #include "include/core/SkCanvasVirtualEnforcer.h" 14 15 struct SkIRect; 16 17 // SkNoDrawCanvas is a helper for SkCanvas subclasses which do not need to 18 // actually rasterize (e.g., analysis of the draw calls). 19 // 20 // It provides the following simplifications: 21 // 22 // * not backed by any device/pixels 23 // * conservative clipping (clipping calls only use rectangles) 24 // 25 class SK_API SkNoDrawCanvas : public SkCanvasVirtualEnforcer<SkCanvas> { 26 public: 27 SkNoDrawCanvas(int width, int height); 28 SkNoDrawCanvas(const SkIRect&); 29 30 explicit SkNoDrawCanvas(sk_sp<SkBaseDevice> device); 31 32 // Optimization to reset state to be the same as after construction. resetCanvas(int w,int h)33 void resetCanvas(int w, int h) { this->resetForNextPicture(SkIRect::MakeWH(w, h)); } resetCanvas(const SkIRect & rect)34 void resetCanvas(const SkIRect& rect) { this->resetForNextPicture(rect); } 35 36 protected: 37 SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override; 38 bool onDoSaveBehind(const SkRect*) override; 39 40 // No-op overrides for aborting rasterization earlier than SkNullBlitter. onDrawAnnotation(const SkRect &,const char[],SkData *)41 void onDrawAnnotation(const SkRect&, const char[], SkData*) override {} onDrawDRRect(const SkRRect &,const SkRRect &,const SkPaint &)42 void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override {} onDrawDrawable(SkDrawable *,const SkMatrix *)43 void onDrawDrawable(SkDrawable*, const SkMatrix*) override {} onDrawTextBlob(const SkTextBlob *,SkScalar,SkScalar,const SkPaint &)44 void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override {} onDrawPatch(const SkPoint[12],const SkColor[4],const SkPoint[4],SkBlendMode,const SkPaint &)45 void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode, 46 const SkPaint&) override {} 47 onDrawPaint(const SkPaint &)48 void onDrawPaint(const SkPaint&) override {} onDrawBehind(const SkPaint &)49 void onDrawBehind(const SkPaint&) override {} onDrawPoints(PointMode,size_t,const SkPoint[],const SkPaint &)50 void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override {} onDrawRect(const SkRect &,const SkPaint &)51 void onDrawRect(const SkRect&, const SkPaint&) override {} onDrawRegion(const SkRegion &,const SkPaint &)52 void onDrawRegion(const SkRegion&, const SkPaint&) override {} onDrawOval(const SkRect &,const SkPaint &)53 void onDrawOval(const SkRect&, const SkPaint&) override {} onDrawArc(const SkRect &,SkScalar,SkScalar,bool,const SkPaint &)54 void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override {} onDrawRRect(const SkRRect &,const SkPaint &)55 void onDrawRRect(const SkRRect&, const SkPaint&) override {} onDrawPath(const SkPath &,const SkPaint &)56 void onDrawPath(const SkPath&, const SkPaint&) override {} 57 onDrawImage2(const SkImage *,SkScalar,SkScalar,const SkSamplingOptions &,const SkPaint *)58 void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&, 59 const SkPaint*) override {} onDrawImageRect2(const SkImage *,const SkRect &,const SkRect &,const SkSamplingOptions &,const SkPaint *,SrcRectConstraint)60 void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&, 61 const SkPaint*, SrcRectConstraint) override {} onDrawImageLattice2(const SkImage *,const Lattice &,const SkRect &,SkFilterMode,const SkPaint *)62 void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode, 63 const SkPaint*) override {} onDrawAtlas2(const SkImage *,const SkRSXform[],const SkRect[],const SkColor[],int,SkBlendMode,const SkSamplingOptions &,const SkRect *,const SkPaint *)64 void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int, 65 SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override {} 66 onDrawVerticesObject(const SkVertices *,SkBlendMode,const SkPaint &)67 void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override {} onDrawShadowRec(const SkPath &,const SkDrawShadowRec &)68 void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override {} onDrawPicture(const SkPicture *,const SkMatrix *,const SkPaint *)69 void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override {} 70 onDrawEdgeAAQuad(const SkRect &,const SkPoint[4],QuadAAFlags,const SkColor4f &,SkBlendMode)71 void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&, 72 SkBlendMode) override {} onDrawEdgeAAImageSet2(const ImageSetEntry[],int,const SkPoint[],const SkMatrix[],const SkSamplingOptions &,const SkPaint *,SrcRectConstraint)73 void onDrawEdgeAAImageSet2(const ImageSetEntry[], int, const SkPoint[], const SkMatrix[], 74 const SkSamplingOptions&, const SkPaint*, 75 SrcRectConstraint) override {} 76 onDrawBlurImage(const SkImage * image,const SkBlurArg & blurArg)77 bool onDrawBlurImage(const SkImage* image, const SkBlurArg& blurArg) override { return false; } 78 79 private: 80 using INHERITED = SkCanvasVirtualEnforcer<SkCanvas>; 81 }; 82 83 #endif // SkNoDrawCanvas_DEFINED 84