SkDiscretePathEffect.h revision 4bbdeac58cc928dc66296bde3bd06e78070d96b7 
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 SkDiscretePathEffect_DEFINED
9#define SkDiscretePathEffect_DEFINED
10
11#include "SkPathEffect.h"
12
13/** \class SkDiscretePathEffect
14
15    This path effect chops a path into discrete segments, and randomly displaces them.
16*/
17class SK_API SkDiscretePathEffect : public SkPathEffect {
18public:
19    /** Break the path into segments of segLength length, and randomly move the endpoints
20        away from the original path by a maximum of deviation.
21        Note: works on filled or framed paths
22    */
23    SkDiscretePathEffect(SkScalar segLength, SkScalar deviation);
24
25    virtual bool filterPath(SkPath* dst, const SkPath& src,
26                            SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
27
28    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiscretePathEffect)
29
30protected:
31    SkDiscretePathEffect(SkFlattenableReadBuffer&);
32    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
33
34private:
35    SkScalar fSegLength, fPerterb;
36
37    typedef SkPathEffect INHERITED;
38};
39
40#endif
41