1 2 /* 3 * Copyright 2006 The Android Open Source Project 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 Sk2DPathEffect_DEFINED 11 #define Sk2DPathEffect_DEFINED 12 13 #include "SkPath.h" 14 #include "SkPathEffect.h" 15 #include "SkMatrix.h" 16 17 class Sk2DPathEffect : public SkPathEffect { 18 public: 19 Sk2DPathEffect(const SkMatrix& mat); 20 21 // overrides 22 virtual bool filterPath(SkPath*, const SkPath&, SkScalar* width) SK_OVERRIDE; 23 24 // overrides from SkFlattenable 25 virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE; 26 virtual Factory getFactory() SK_OVERRIDE; 27 28 protected: 29 /** New virtual, to be overridden by subclasses. 30 This is called once from filterPath, and provides the 31 uv parameter bounds for the path. Subsequent calls to 32 next() will receive u and v values within these bounds, 33 and then a call to end() will signal the end of processing. 34 */ 35 virtual void begin(const SkIRect& uvBounds, SkPath* dst); 36 virtual void next(const SkPoint& loc, int u, int v, SkPath* dst); 37 virtual void end(SkPath* dst); 38 39 /** Low-level virtual called per span of locations in the u-direction. 40 The default implementation calls next() repeatedly with each 41 location. 42 */ 43 virtual void nextSpan(int u, int v, int ucount, SkPath* dst); 44 45 const SkMatrix& getMatrix() const { return fMatrix; } 46 47 // protected so that subclasses can call this during unflattening 48 Sk2DPathEffect(SkFlattenableReadBuffer&); 49 50 SK_DECLARE_FLATTENABLE_REGISTRAR() 51 52 private: 53 SkMatrix fMatrix, fInverse; 54 // illegal 55 Sk2DPathEffect(const Sk2DPathEffect&); 56 Sk2DPathEffect& operator=(const Sk2DPathEffect&); 57 58 static SkFlattenable* CreateProc(SkFlattenableReadBuffer&); 59 60 friend class Sk2DPathEffectBlitter; 61 typedef SkPathEffect INHERITED; 62 }; 63 64 class SkPath2DPathEffect : public Sk2DPathEffect { 65 public: 66 /** 67 * Stamp the specified path to fill the shape, using the matrix to define 68 * the latice. 69 */ 70 SkPath2DPathEffect(const SkMatrix&, const SkPath&); 71 72 static SkFlattenable* CreateProc(SkFlattenableReadBuffer&); 73 74 SK_DECLARE_FLATTENABLE_REGISTRAR() 75 76 protected: 77 SkPath2DPathEffect(SkFlattenableReadBuffer& buffer); 78 79 virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE; 80 virtual Factory getFactory() SK_OVERRIDE; 81 virtual void next(const SkPoint&, int u, int v, SkPath* dst) SK_OVERRIDE; 82 83 private: 84 SkPath fPath; 85 86 typedef Sk2DPathEffect INHERITED; 87 }; 88 89 90 #endif 91