include/graphics/SkDiscretePathEffect.h

/* include/graphics/SkDiscretePathEffect.h
**
** Copyright 2006, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License"); 
** you may not use this file except in compliance with the License. 
** You may obtain a copy of the License at 
**
**     http://www.apache.org/licenses/LICENSE-2.0 
**
** Unless required by applicable law or agreed to in writing, software 
** distributed under the License is distributed on an "AS IS" BASIS, 
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
** See the License for the specific language governing permissions and 
** limitations under the License.
*/

#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 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
    */
    SkDiscretePathEffect(SkScalar segLength, SkScalar deviation);

    // overrides for SkPathEffect
    //  This method is not exported to java.
    virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width);

    // overrides for SkFlattenable
    //  This method is not exported to java.
    virtual Factory getFactory();
    //  This method is not exported to java.
    virtual void flatten(SkWBuffer&);

protected:
    SkDiscretePathEffect(SkRBuffer&);

private:
    SkScalar fSegLength, fPerterb;

    static SkFlattenable* CreateProc(SkRBuffer&);
    
    typedef SkPathEffect INHERITED;
};

#endif