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diff --git a/skia/include/SkPixelXorXfermode.h b/skia/include/SkPixelXorXfermode.h
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+++ b/skia/include/SkPixelXorXfermode.h
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+/*
+ * Copyright (C) 2007 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#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&);
+
+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
+