SkDiscretePathEffect.h revision 6bac947cd5bc460dd9166ada6310d678fd2e39f8 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SkDiscretePathEffect_DEFINED
18#define SkDiscretePathEffect_DEFINED
19
20#include "SkPathEffect.h"
21
22/** \class SkDiscretePathEffect
23
24    This path effect chops a path into discrete segments, and randomly displaces them.
25*/
26class SkDiscretePathEffect : public SkPathEffect {
27public:
28    /** Break the path into segments of segLength length, and randomly move the endpoints
29        away from the original path by a maximum of deviation.
30        Note: works on filled or framed paths
31    */
32    SkDiscretePathEffect(SkScalar segLength, SkScalar deviation);
33
34    // overrides for SkPathEffect
35    //  This method is not exported to java.
36    virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width);
37
38    // overrides for SkFlattenable
39    //  This method is not exported to java.
40    virtual Factory getFactory();
41    //  This method is not exported to java.
42    virtual void flatten(SkFlattenableWriteBuffer&);
43
44    static SkFlattenable* CreateProc(SkFlattenableReadBuffer&);
45
46protected:
47    SkDiscretePathEffect(SkFlattenableReadBuffer&);
48
49private:
50    SkScalar fSegLength, fPerterb;
51
52    typedef SkPathEffect INHERITED;
53};
54
55#endif
56
57