include/effects/SkDiscretePathEffect.h

/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkDiscretePathEffect_DEFINED
#define SkDiscretePathEffect_DEFINED

#include "SkPathEffect.h"

/** \class SkDiscretePathEffect

    This path effect chops a path into discrete segments, and randomly displaces them.
*/
class SK_API SkDiscretePathEffect : public SkPathEffect {
public:
    /** Break the path into segments of segLength length, and randomly move the endpoints
        away from the original path by a maximum of deviation.
        Note: works on filled or framed paths
    */
    static SkDiscretePathEffect* Create(SkScalar segLength, SkScalar deviation) {
        return SkNEW_ARGS(SkDiscretePathEffect, (segLength, deviation));
    }

    virtual bool filterPath(SkPath* dst, const SkPath& src,
                            SkStrokeRec*, const SkRect*) const SK_OVERRIDE;

    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiscretePathEffect)

protected:
    SkDiscretePathEffect(SkScalar segLength, SkScalar deviation);
    explicit SkDiscretePathEffect(SkReadBuffer&);
    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;

private:
    SkScalar fSegLength, fPerterb;

    typedef SkPathEffect INHERITED;
};

#endif