New chrome-inspired benchmark

bench/ChromeBench.cpp

Index: bench/ChromeBench.cpp 
=================================================================== 
--- bench/ChromeBench.cpp	(revision 4236) 
+++ bench/ChromeBench.cpp	(working copy) 
@@ -5,8 +5,10 @@ 
 * found in the LICENSE file. 
 */ 
 #include "SkBenchmark.h" 
+#include "SkBlurMaskFilter.h" 
 #include "SkCanvas.h" 
 #include "SkPaint.h" 
+#include "SkShader.h" 
 #include "SkString.h" 
 
 /** 
@@ -491,11 +493,80 @@ 
 typedef SkBenchmark INHERITED; 
 }; 
 
+/// Emulate http://wrapbootstrap.com/preview/WB003517L: tiled alpha-blended 
+/// pattern scrolling from frame to frame. 
+/// TODO: add soft clipping? 
+class AnimateBarBench : public SkBenchmark { 
+ SkPaint fPaint; 
+ SkPath fClipPath; 
+ bool fInit; 
+ enum { 
+ W = 800, 
+ H = 600 
+ }; 
+public: 
+ AnimateBarBench(void* param) : INHERITED(param), fInit(false) { } 
+ 
+protected: 
+ 
+ virtual const char* onGetName() { return "chrome_animateBar"; } 
+ virtual void onDraw(SkCanvas* canvas) { 
+ // Avoid drawing during the constructor 
+ if (!fInit) { 
+ setup(); 
+ } 
+ SkRect r = SkRect::MakeWH(SkIntToScalar(800), SkIntToScalar(20)); 
+ SkMatrix m; 
+ m.reset(); 
+ canvas->clipPath(fClipPath, SkRegion::kReplace_Op, true); 
+ for (int i = 0; i < SkBENCHLOOP(200); i++) { 
+ SkShader* s = fPaint.getShader(); 
+ m.setTranslateX(SkIntToScalar(i)); 
+ s->setLocalMatrix(m); 
+ canvas->drawRect(r, fPaint); 
+ } 
+ } 
+ 
+ virtual SkIPoint onGetSize() { return SkIPoint::Make(W, H); } 
+ 
+private: 
+ 
+ void setup() { 
+ this->setupPaint(&fPaint); 
+ fPaint.setAntiAlias(true); 
+ SkMaskFilter* mf = SkBlurMaskFilter::Create(2.0f, 
+ SkBlurMaskFilter::kInner_BlurStyle, 0); 
+ fPaint.setMaskFilter(mf)->unref(); 
+ SkBitmap bm; 
+ bm.setConfig(SkBitmap::kARGB_8888_Config, 40, 40); 
+ bm.allocPixels(); 
+ bm.eraseColor(0); 
+ SkShader* s = SkShader::CreateBitmapShader(bm, 
+ SkShader::kRepeat_TileMode, SkShader::kClamp_TileMode); 
+ fPaint.setShader(s)->unref(); 
+ 
+ SkRect clipRect; 
+ clipRect.set(SkIntToScalar(0), SkIntToScalar(0), 
+ SkIntToScalar(800), SkIntToScalar(20)); 
+ fClipPath.addRoundRect(clipRect, SkIntToScalar(5), SkIntToScalar(5)); 
+ 
+ fInit = true; 
+ } 
+ 
+ typedef SkBenchmark INHERITED; 
+}; 
+ 
+ 
+ 
 static SkBenchmark* ScrollGmailFactory(void* p) { 
 return SkNEW_ARGS(ScrollGmailBench, (p)); 
 } 
+static SkBenchmark* AnimateBarFactory(void* p) { 
+ return SkNEW_ARGS(AnimateBarBench, (p)); 
+} 
 
 // Disabled this benchmark: it takes 15x longer than any other benchmark 
 // and is probably not giving us important information. 
 //static BenchRegistry gScrollGmailReg(ScrollGmailFactory); 
 
+static BenchRegistry gAnimateBarReg(AnimateBarFactory);