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 "SkCanvas.h" 12 #include "SkVertices.h" 13 14 struct SkIRect; 15 16 // SkNoDrawCanvas is a helper for SkCanvas subclasses which do not need to 17 // actually rasterize (e.g., analysis of the draw calls). 18 // 19 // It provides the following simplifications: 20 // 21 // * not backed by any device/pixels 22 // * conservative clipping (clipping calls only use rectangles) 23 // 24 class SK_API SkNoDrawCanvas : public SkCanvas { 25 public: 26 SkNoDrawCanvas(int width, int height); 27 28 // TODO: investigate the users of this ctor. 29 SkNoDrawCanvas(const SkIRect&); 30 31 // Optimization to reset state to be the same as after construction. resetCanvas(int width,int height)32 void resetCanvas(int width, int height) { 33 resetForNextPicture(SkIRect::MakeWH(width, height)); 34 } 35 36 protected: 37 SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override; 38 39 // No-op overrides for aborting rasterization earlier than SkNullBlitter. onDrawDRRect(const SkRRect &,const SkRRect &,const SkPaint &)40 void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override {} onDrawDrawable(SkDrawable *,const SkMatrix *)41 void onDrawDrawable(SkDrawable*, const SkMatrix*) override {} onDrawText(const void *,size_t,SkScalar,SkScalar,const SkPaint &)42 void onDrawText(const void*, size_t, SkScalar, SkScalar, const SkPaint&) override {} onDrawPosText(const void *,size_t,const SkPoint[],const SkPaint &)43 void onDrawPosText(const void*, size_t, const SkPoint[], const SkPaint&) override {} onDrawPosTextH(const void *,size_t,const SkScalar[],SkScalar,const SkPaint &)44 void onDrawPosTextH(const void*, size_t, const SkScalar[], SkScalar, const SkPaint&) override {} onDrawTextOnPath(const void *,size_t,const SkPath &,const SkMatrix *,const SkPaint &)45 void onDrawTextOnPath(const void*, size_t, const SkPath&, const SkMatrix*, 46 const SkPaint&) override {} onDrawTextRSXform(const void *,size_t,const SkRSXform[],const SkRect *,const SkPaint &)47 void onDrawTextRSXform(const void*, size_t, const SkRSXform[], const SkRect*, 48 const SkPaint&) override {} onDrawTextBlob(const SkTextBlob *,SkScalar,SkScalar,const SkPaint &)49 void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override {} onDrawPatch(const SkPoint[12],const SkColor[4],const SkPoint[4],SkBlendMode,const SkPaint &)50 void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode, 51 const SkPaint&) override {} 52 onDrawPaint(const SkPaint &)53 void onDrawPaint(const SkPaint&) override {} onDrawPoints(PointMode,size_t,const SkPoint[],const SkPaint &)54 void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override {} onDrawRect(const SkRect &,const SkPaint &)55 void onDrawRect(const SkRect&, const SkPaint&) override {} onDrawRegion(const SkRegion &,const SkPaint &)56 void onDrawRegion(const SkRegion&, const SkPaint&) override {} onDrawOval(const SkRect &,const SkPaint &)57 void onDrawOval(const SkRect&, const SkPaint&) override {} onDrawArc(const SkRect &,SkScalar,SkScalar,bool,const SkPaint &)58 void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override {} onDrawRRect(const SkRRect &,const SkPaint &)59 void onDrawRRect(const SkRRect&, const SkPaint&) override {} onDrawPath(const SkPath &,const SkPaint &)60 void onDrawPath(const SkPath&, const SkPaint&) override {} onDrawBitmap(const SkBitmap &,SkScalar,SkScalar,const SkPaint *)61 void onDrawBitmap(const SkBitmap&, SkScalar, SkScalar, const SkPaint*) override {} onDrawBitmapRect(const SkBitmap &,const SkRect *,const SkRect &,const SkPaint *,SrcRectConstraint)62 void onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect&, const SkPaint*, 63 SrcRectConstraint) override {} onDrawImage(const SkImage *,SkScalar,SkScalar,const SkPaint *)64 void onDrawImage(const SkImage*, SkScalar, SkScalar, const SkPaint*) override {} onDrawImageRect(const SkImage *,const SkRect *,const SkRect &,const SkPaint *,SrcRectConstraint)65 void onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*, 66 SrcRectConstraint) override {} onDrawImageNine(const SkImage *,const SkIRect &,const SkRect &,const SkPaint *)67 void onDrawImageNine(const SkImage*, const SkIRect&, const SkRect&, const SkPaint*) override {} onDrawBitmapNine(const SkBitmap &,const SkIRect &,const SkRect &,const SkPaint *)68 void onDrawBitmapNine(const SkBitmap&, const SkIRect&, const SkRect&, 69 const SkPaint*) override {} onDrawImageLattice(const SkImage *,const Lattice &,const SkRect &,const SkPaint *)70 void onDrawImageLattice(const SkImage*, const Lattice&, const SkRect&, 71 const SkPaint*) override {} onDrawBitmapLattice(const SkBitmap &,const Lattice &,const SkRect &,const SkPaint *)72 void onDrawBitmapLattice(const SkBitmap&, const Lattice&, const SkRect&, 73 const SkPaint*) override {} onDrawVerticesObject(const SkVertices *,SkBlendMode,const SkPaint &)74 void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override {} onDrawAtlas(const SkImage *,const SkRSXform[],const SkRect[],const SkColor[],int,SkBlendMode,const SkRect *,const SkPaint *)75 void onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], 76 int, SkBlendMode, const SkRect*, const SkPaint*) override {} 77 78 private: 79 typedef SkCanvas INHERITED; 80 }; 81 82 #endif // SkNoDrawCanvas_DEFINED 83