experimental speedup some xfermodes with Sk4f

bench/XfermodeBench.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 "Benchmark.h"
 #include "SkCanvas.h"
@@ skipping 28 matching lines @@
             paint.setXfermode(fXfermode.get());
             paint.setColor(random.nextU());
             SkScalar w = random.nextRangeScalar(SkIntToScalar(kMinSize), SkIntToScalar(kMaxSize));
             SkScalar h = random.nextRangeScalar(SkIntToScalar(kMinSize), SkIntToScalar(kMaxSize));
             SkRect rect = SkRect::MakeXYWH(
                 random.nextUScalar1() * (size.fWidth - w),
                 random.nextUScalar1() * (size.fHeight - h),
                 w,
                 h
             );
-            canvas->drawRect(rect, paint);
+            for (int j = 0; j < 1000; ++j) {
+                canvas->drawRect(rect, paint);
+            }
         }
     }
 
 private:
     enum {
         kMinSize = 50,
         kMaxSize = 100,
     };
     SkAutoTUnref<SkXfermode> fXfermode;
     SkString fName;
@@ skipping 58 matching lines @@
 BENCH(SkXfermode::kDifference_Mode)
 BENCH(SkXfermode::kExclusion_Mode)
 BENCH(SkXfermode::kMultiply_Mode)
 
 BENCH(SkXfermode::kHue_Mode)
 BENCH(SkXfermode::kSaturation_Mode)
 BENCH(SkXfermode::kColor_Mode)
 BENCH(SkXfermode::kLuminosity_Mode)
 
 DEF_BENCH(return new XferCreateBench;)