6d10f8bda1
- change filterPath to safely handle if src and dst are aliases Bug: skia:8254 Change-Id: I125d19404ca0a610f73271abb5c5455d1d50f9ed Reviewed-on: https://skia-review.googlesource.com/147466 Commit-Queue: Mike Reed <reed@google.com> Commit-Queue: Kevin Lubick <kjlubick@google.com> Reviewed-by: Kevin Lubick <kjlubick@google.com> Auto-Submit: Mike Reed <reed@google.com>
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/*
|
|
* 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 "SkFlattenable.h"
|
|
#include "SkPathEffect.h"
|
|
#include "SkPath.h"
|
|
|
|
class SkPathMeasure;
|
|
|
|
// This class is not exported to java.
|
|
class SK_API Sk1DPathEffect : public SkPathEffect {
|
|
public:
|
|
protected:
|
|
bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*) const override;
|
|
|
|
/** 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);
|
|
|
|
Factory getFactory() const override { return CreateProc; }
|
|
|
|
protected:
|
|
SkPath1DPathEffect(const SkPath& path, SkScalar advance, SkScalar phase, Style);
|
|
void flatten(SkWriteBuffer&) const override;
|
|
bool onFilterPath(SkPath*, const SkPath&, SkStrokeRec*, const SkRect*) const override;
|
|
|
|
// overrides from Sk1DPathEffect
|
|
SkScalar begin(SkScalar contourLength) const override;
|
|
SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const override;
|
|
|
|
private:
|
|
static sk_sp<SkFlattenable> CreateProc(SkReadBuffer&);
|
|
friend class SkFlattenable::PrivateInitializer;
|
|
|
|
SkPath fPath; // copied from constructor
|
|
SkScalar fAdvance; // copied from constructor
|
|
SkScalar fInitialOffset; // computed from phase
|
|
Style fStyle; // copied from constructor
|
|
|
|
typedef Sk1DPathEffect INHERITED;
|
|
};
|
|
|
|
#endif
|