New option for arithmetic mode

gm/xfermodeimagefilter.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkArithmeticMode.h"
 #include "SkOffsetImageFilter.h"
+#include "SkValidateImageFilter.h"
 #include "SkXfermodeImageFilter.h"
 #include "SkBitmapSource.h"
 
 #define WIDTH 600
 #define HEIGHT 600
 #define MARGIN 12
 
 namespace skiagm {
 
 class XfermodeImageFilterGM : public GM {
@@ skipping 115 matching lines @@
             SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background));
             paint.setImageFilter(filter);
             drawClippedBitmap(canvas, fBitmap, paint, x, y);
             x += fBitmap.width() + MARGIN;
             if (x + fBitmap.width() > WIDTH) {
                 x = 0;
                 y += fBitmap.height() + MARGIN;
             }
         }
         // Test arithmetic mode as image filter
-        SkAutoTUnref<SkXfermode> mode(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0));
-        SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background));
+        SkAutoTUnref<SkXfermode> mode(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0, false));
+        SkAutoTUnref<SkImageFilter> xferFilter(SkXfermodeImageFilter::Create(mode, background));
+        SkAutoTUnref<SkImageFilter> filter(SkValidateImageFilter::Create(xferFilter));
         paint.setImageFilter(filter);
         drawClippedBitmap(canvas, fBitmap, paint, x, y);
         x += fBitmap.width() + MARGIN;
         if (x + fBitmap.width() > WIDTH) {
             x = 0;
             y += fBitmap.height() + MARGIN;
         }
         // Test NULL mode
         filter.reset(SkXfermodeImageFilter::Create(NULL, background));
         paint.setImageFilter(filter);
@@ skipping 59 matching lines @@
 private:
     SkBitmap fBitmap, fCheckerboard;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new XfermodeImageFilterGM; );
 
 }