Add Xfermode bench. Also clear before rendering in bench (rather than after).

bench/benchmain.cpp

 
 /*
  * 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 "BenchTimer.h"
@@ skipping 804 matching lines @@
                         canvas->ref();
                         break;
                     }
                     case kNormal_benchModes:
                         canvas = new SkCanvas(device);
                         break;
                     default:
                         SkASSERT(0);
                 }
                 device->unref();
+                canvas->clear(SK_ColorWHITE);
             }
             SkAutoUnref canvasUnref(canvas);
 
             if (NULL != canvas) {
                 if (doClip) {
                     performClip(canvas, dim.fX, dim.fY);
                 }
                 if (doScale) {
                     performScale(canvas, dim.fX, dim.fY);
                 }
@@ skipping 86 matching lines @@
             if (repeatDraw > 1) {
                 SkString result = timerData.getResult(logPerIter, printMin, repeatDraw, configName,
                                                       timerWall, truncatedTimerWall, timerCpu,
                                                       truncatedTimerCpu,
                                                       timerGpu && NULL != context);
                 logger.logProgress(result);
             }
             if (outDir.size() > 0 && kNonRendering_Backend != backend) {
                 saveFile(bench->getName(), configName, outDir.c_str(),
                          device->accessBitmap(false));
-                canvas->clear(SK_ColorWHITE);
             }
         }
         if (loggedBenchStart) {
             logger.logProgress(SkString("\n"));
         }
     }
 #if SK_SUPPORT_GPU
 #if GR_CACHE_STATS
     for (int i = 0; i <= GrContextFactory::kLastGLContextType; ++i) {
         GrContextFactory::GLContextType ctxType = (GrContextFactory::GLContextType)i;
@@ skipping 13 matching lines @@
     }
 
     return 0;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif