skia2/include/client/android/SkPixelXorXfermode.h

48 lines
1.4 KiB
C++

/*
* 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 SK_API SkPixelXorXfermode : public SkXfermode {
public:
static SkXfermode* Create(SkColor opColor) {
return new SkPixelXorXfermode(opColor);
}
#if SK_SUPPORT_GPU
const GrFragmentProcessor* getFragmentProcessorForImageFilter(
const GrFragmentProcessor* dst) const override;
GrXPFactory* asXPFactory() const override;
#endif
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPixelXorXfermode)
protected:
void flatten(SkWriteBuffer&) const override;
SkPMColor xferColor(SkPMColor src, SkPMColor dst) const override;
private:
explicit SkPixelXorXfermode(SkColor opColor) {
fOpColor = SkPreMultiplyColor(opColor | 0xFF000000);
}
SkPMColor fOpColor;
typedef SkXfermode INHERITED;
};
#endif