skia2/include/effects/Sk2DPathEffect.h
djsollen@google.com 54924243c1 Cleanup code related to SkFlattenable::flatten()
The following changes were made by this CL:

1. Make flatten() a protected method as callers should use
   SkFlattenableWriteBuffer to flatten an object
2. Make flatten a const method (including subclasses)
3. Mark subclass implementation of flatten with SK_OVERRIDE
4. Ensure overridden flatten impls call their parent
5. Remove no-op implementations of flatten from subclasses

Additionally, if necessary the unflattening constructor was
also moved to the protected section of the subclasses
header if it was not already there.

git-svn-id: http://skia.googlecode.com/svn/trunk@3540 2bbb7eff-a529-9590-31e7-b0007b416f81
2012-03-29 15:18:04 +00:00

83 lines
2.3 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 Sk2DPathEffect_DEFINED
#define Sk2DPathEffect_DEFINED
#include "SkPath.h"
#include "SkPathEffect.h"
#include "SkMatrix.h"
class Sk2DPathEffect : public SkPathEffect {
public:
Sk2DPathEffect(const SkMatrix& mat);
// overrides
virtual bool filterPath(SkPath*, const SkPath&, SkScalar* width) SK_OVERRIDE;
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Sk2DPathEffect)
protected:
/** New virtual, to be overridden by subclasses.
This is called once from filterPath, and provides the
uv parameter bounds for the path. Subsequent calls to
next() will receive u and v values within these bounds,
and then a call to end() will signal the end of processing.
*/
virtual void begin(const SkIRect& uvBounds, SkPath* dst);
virtual void next(const SkPoint& loc, int u, int v, SkPath* dst);
virtual void end(SkPath* dst);
/** Low-level virtual called per span of locations in the u-direction.
The default implementation calls next() repeatedly with each
location.
*/
virtual void nextSpan(int u, int v, int ucount, SkPath* dst);
const SkMatrix& getMatrix() const { return fMatrix; }
// protected so that subclasses can call this during unflattening
Sk2DPathEffect(SkFlattenableReadBuffer&);
virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
private:
SkMatrix fMatrix, fInverse;
// illegal
Sk2DPathEffect(const Sk2DPathEffect&);
Sk2DPathEffect& operator=(const Sk2DPathEffect&);
friend class Sk2DPathEffectBlitter;
typedef SkPathEffect INHERITED;
};
class SkPath2DPathEffect : public Sk2DPathEffect {
public:
/**
* Stamp the specified path to fill the shape, using the matrix to define
* the latice.
*/
SkPath2DPathEffect(const SkMatrix&, const SkPath&);
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPath2DPathEffect)
protected:
SkPath2DPathEffect(SkFlattenableReadBuffer& buffer);
virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
virtual void next(const SkPoint&, int u, int v, SkPath* dst) SK_OVERRIDE;
private:
SkPath fPath;
typedef Sk2DPathEffect INHERITED;
};
#endif