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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 SK_API SkPixelXorXfermode : public SkXfermode {

 public:

     static SkPixelXorXfermode* Create(SkColor opColor) {

         return SkNEW_ARGS(SkPixelXorXfermode, (opColor));

     }

     SK_TO_STRING_OVERRIDE()

     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPixelXorXfermode)

 protected:

     SkPixelXorXfermode(SkReadBuffer& rb);

     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;

     // override from SkXfermode

     virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const;

 #ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS

 public:

 #endif

     SkPixelXorXfermode(SkColor opColor) : fOpColor(opColor) {}

 private:

     SkColor fOpColor;

     typedef SkXfermode INHERITED;

 };

 #endif