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/*
* 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 Sk1DPathEffect_DEFINED
#define Sk1DPathEffect_DEFINED
#include "SkPathEffect.h"
#include "SkPath.h"
class SkPathMeasure;
// This class is not exported to java.
class Sk1DPathEffect : public SkPathEffect {
public:
// override from SkPathEffect
virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width);
protected:
/** Called at the start of each contour, returns the initial offset
into that contour.
*/
virtual SkScalar begin(SkScalar contourLength) = 0;
/** Called with the current distance along the path, with the current matrix
for the point/tangent at the specified distance.
Return the distance to travel for the next call. If return <= 0, then that
contour is done.
*/
virtual SkScalar next(SkPath* dst, SkScalar distance, SkPathMeasure&) = 0;
private:
typedef SkPathEffect INHERITED;
};
class SkPath1DPathEffect : public Sk1DPathEffect {
public:
enum Style {
kTranslate_Style, // translate the shape to each position
kRotate_Style, // rotate the shape about its center
kMorph_Style, // transform each point, and turn lines into curves
kStyleCount
};
/** Dash by replicating the specified path.
@param path The path to replicate (dash)
@param advance The space between instances of path
@param phase distance (mod advance) along path for its initial position
@param style how to transform path at each point (based on the current
position and tangent)
*/
SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style);
// override from SkPathEffect
virtual bool filterPath(SkPath*, const SkPath&, SkScalar* width) SK_OVERRIDE;
static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
return SkNEW_ARGS(SkPath1DPathEffect, (buffer));
}
SK_DECLARE_FLATTENABLE_REGISTRAR()
protected:
SkPath1DPathEffect(SkFlattenableReadBuffer& buffer);
// overrides from Sk1DPathEffect
virtual SkScalar begin(SkScalar contourLength) SK_OVERRIDE;
virtual SkScalar next(SkPath*, SkScalar distance, SkPathMeasure&) SK_OVERRIDE;
// overrides from SkFlattenable
virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
virtual Factory getFactory() SK_OVERRIDE { return CreateProc; }
private:
SkPath fPath; // copied from constructor
SkScalar fAdvance; // copied from constructor
SkScalar fInitialOffset; // computed from phase
Style fStyle; // copied from constructor
typedef Sk1DPathEffect INHERITED;
};
#endif
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