1 /* 2 * Copyright 2006 The Android Open Source Project 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 Sk1DPathEffect_DEFINED 9 #define Sk1DPathEffect_DEFINED 10 11 #include "SkPathEffect.h" 12 #include "SkPath.h" 13 14 class SkPathMeasure; 15 16 // This class is not exported to java. 17 class SK_API Sk1DPathEffect : public SkPathEffect { 18 public: 19 virtual bool filterPath(SkPath* dst, const SkPath& src, 20 SkStrokeRec*, const SkRect*) const override; 21 22 protected: 23 /** Called at the start of each contour, returns the initial offset 24 into that contour. 25 */ 26 virtual SkScalar begin(SkScalar contourLength) const = 0; 27 /** Called with the current distance along the path, with the current matrix 28 for the point/tangent at the specified distance. 29 Return the distance to travel for the next call. If return <= 0, then that 30 contour is done. 31 */ 32 virtual SkScalar next(SkPath* dst, SkScalar dist, SkPathMeasure&) const = 0; 33 34 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK 35 bool exposedInAndroidJavaAPI() const override { return true; } 36 #endif 37 38 private: 39 typedef SkPathEffect INHERITED; 40 }; 41 42 class SK_API SkPath1DPathEffect : public Sk1DPathEffect { 43 public: 44 enum Style { 45 kTranslate_Style, // translate the shape to each position 46 kRotate_Style, // rotate the shape about its center 47 kMorph_Style, // transform each point, and turn lines into curves 48 49 kLastEnum_Style = kMorph_Style, 50 }; 51 52 /** Dash by replicating the specified path. 53 @param path The path to replicate (dash) 54 @param advance The space between instances of path 55 @param phase distance (mod advance) along path for its initial position 56 @param style how to transform path at each point (based on the current 57 position and tangent) 58 */ 59 static SkPathEffect* Create(const SkPath& path, SkScalar advance, SkScalar phase, Style); 60 61 virtual bool filterPath(SkPath*, const SkPath&, 62 SkStrokeRec*, const SkRect*) const override; 63 64 SK_TO_STRING_OVERRIDE() 65 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath1DPathEffect) 66 67 protected: 68 SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style); 69 void flatten(SkWriteBuffer&) const override; 70 71 // overrides from Sk1DPathEffect 72 SkScalar begin(SkScalar contourLength) const override; 73 SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const override; 74 75 private: 76 SkPath fPath; // copied from constructor 77 SkScalar fAdvance; // copied from constructor 78 SkScalar fInitialOffset; // computed from phase 79 Style fStyle; // copied from constructor 80 81 typedef Sk1DPathEffect INHERITED; 82 }; 83 84 #endif 85
