diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/effects/SkPixelXorXfermode.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/effects/SkPixelXorXfermode.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,39 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#include "SkPixelXorXfermode.h"
+#include "SkColorPriv.h"
+#include "SkReadBuffer.h"
+#include "SkWriteBuffer.h"
+#include "SkString.h"
+
+// we always return an opaque color, 'cause I don't know what to do with
+// the alpha-component and still return a valid premultiplied color.
+SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) const {
+    SkPMColor res = src ^ dst ^ fOpColor;
+    res |= (SK_A32_MASK << SK_A32_SHIFT);   // force it to be opaque
+    return res;
+}
+
+void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const {
+    this->INHERITED::flatten(wb);
+    wb.writeColor(fOpColor);
+}
+
+SkPixelXorXfermode::SkPixelXorXfermode(SkReadBuffer& rb)
+        : INHERITED(rb) {
+    fOpColor = rb.readColor();
+}
+
+#ifndef SK_IGNORE_TO_STRING
+void SkPixelXorXfermode::toString(SkString* str) const {
+    str->append("SkPixelXorXfermode: ");
+    str->appendHex(fOpColor);
+}
+#endif