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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 SK_API Sk1DPathEffect : public SkPathEffect {
public:
virtual bool filterPath(SkPath* dst, const SkPath& src,
SkStrokeRec*, const SkRect*) const override;
protected:
/** Called at the start of each contour, returns the initial offset
into that contour.
*/
virtual SkScalar begin(SkScalar contourLength) const = 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 dist, SkPathMeasure&) const = 0;
#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
bool exposedInAndroidJavaAPI() const override { return true; }
#endif
private:
typedef SkPathEffect INHERITED;
};
class SK_API 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
kLastEnum_Style = kMorph_Style,
};
/** 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)
*/
static sk_sp<SkPathEffect> Make(const SkPath& path, SkScalar advance, SkScalar phase, Style);
virtual bool filterPath(SkPath*, const SkPath&,
SkStrokeRec*, const SkRect*) const override;
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath1DPathEffect)
protected:
SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style);
void flatten(SkWriteBuffer&) const override;
// overrides from Sk1DPathEffect
SkScalar begin(SkScalar contourLength) const override;
SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const override;
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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