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/*
* Copyright 2007 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 SkPixelXorXfermode_DEFINED
#define SkPixelXorXfermode_DEFINED
#include "SkXfermode.h"
/** SkPixelXorXfermode implements a simple pixel xor (op ^ src ^ dst).
This transformation does not follow premultiplied conventions, therefore
this proc *always* returns an opaque color (alpha == 255). Thus it is
not really usefull for operating on blended colors.
*/
class SkPixelXorXfermode : public SkXfermode {
public:
SkPixelXorXfermode(SkColor opColor) : fOpColor(opColor) {}
// override from SkFlattenable
virtual Factory getFactory();
virtual void flatten(SkFlattenableWriteBuffer&);
static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
return SkNEW_ARGS(SkPixelXorXfermode, (buffer));
}
SK_DECLARE_FLATTENABLE_REGISTRAR()
protected:
// override from SkXfermode
virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst);
private:
SkColor fOpColor;
SkPixelXorXfermode(SkFlattenableReadBuffer& rb);
// our private factory
static SkFlattenable* Create(SkFlattenableReadBuffer&);
typedef SkXfermode INHERITED;
};
#endif
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