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 SK_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 private: 35 typedef SkPathEffect INHERITED; 36 }; 37 38 class SK_API SkPath1DPathEffect : public Sk1DPathEffect { 39 public: 40 enum Style { 41 kTranslate_Style, // translate the shape to each position 42 kRotate_Style, // rotate the shape about its center 43 kMorph_Style, // transform each point, and turn lines into curves 44 45 kStyleCount 46 }; 47 48 /** Dash by replicating the specified path. 49 @param path The path to replicate (dash) 50 @param advance The space between instances of path 51 @param phase distance (mod advance) along path for its initial position 52 @param style how to transform path at each point (based on the current 53 position and tangent) 54 */ 55 static SkPath1DPathEffect* Create(const SkPath& path, SkScalar advance, SkScalar phase, 56 Style style) { 57 return SkNEW_ARGS(SkPath1DPathEffect, (path, advance, phase, style)); 58 } 59 60 virtual bool filterPath(SkPath*, const SkPath&, 61 SkStrokeRec*, const SkRect*) const SK_OVERRIDE; 62 63 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath1DPathEffect) 64 65 protected: 66 SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style); 67 #ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING 68 explicit SkPath1DPathEffect(SkReadBuffer& buffer); 69 #endif 70 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; 71 72 // overrides from Sk1DPathEffect 73 virtual SkScalar begin(SkScalar contourLength) const SK_OVERRIDE; 74 virtual SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const SK_OVERRIDE; 75 76 private: 77 SkPath fPath; // copied from constructor 78 SkScalar fAdvance; // copied from constructor 79 SkScalar fInitialOffset; // computed from phase 80 Style fStyle; // copied from constructor 81 82 typedef Sk1DPathEffect INHERITED; 83 }; 84 85 #endif 86
