add rounded-join option to bigpath bench

bench/BigPathBench.cpp

 /*
  * Copyright 2015 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"
 #include "SkPath.h"
 #include "SkString.h"
 
 static void make_path(SkPath& path) {
     #include "BigPathBench.inc"
 }
 
 enum Align {
     kLeft_Align,
     kMiddle_Align,
     kRight_Align
 };
 
 const char* gAlignName[] = { "left", "middle", "right" };
 
 // Inspired by crbug.com/455429
 class BigPathBench : public Benchmark {
     SkPath      fPath;
     SkString    fName;
     Align       fAlign;
+    bool        fRound;
 
 public:
-    BigPathBench(Align align) : fAlign(align) {
+    BigPathBench(Align align, bool round) : fAlign(align), fRound(round) {
         fName.printf("bigpath_%s", gAlignName[fAlign]);
+        if (round) {
+            fName.append("_round");
+        }
     }
 
 protected:
     const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }
 
     SkIPoint onGetSize() SK_OVERRIDE {
         return SkIPoint::Make(640, 100);
     }
 
     void onPreDraw() SK_OVERRIDE {
         make_path(fPath);
     }
 
     void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeWidth(2);
+        if (fRound) {
+            paint.setStrokeJoin(SkPaint::kRound_Join);
+        }
         this->setupPaint(&paint);
 
         const SkRect r = fPath.getBounds();
         switch (fAlign) {
             case kLeft_Align:
                 canvas->translate(-r.left(), 0);
                 break;
             case kMiddle_Align:
                 break;
             case kRight_Align:
                 canvas->translate(640 - r.right(), 0);
                 break;
         }
 
         for (int i = 0; i < loops; i++) {
             canvas->drawPath(fPath, paint);
         }
     }
 
 private:
     typedef Benchmark INHERITED;
 };
 
-DEF_BENCH( return new BigPathBench(kLeft_Align); )
-DEF_BENCH( return new BigPathBench(kMiddle_Align); )
-DEF_BENCH( return new BigPathBench(kRight_Align); )
+DEF_BENCH( return new BigPathBench(kLeft_Align,     false); )
+DEF_BENCH( return new BigPathBench(kMiddle_Align,   false); )
+DEF_BENCH( return new BigPathBench(kRight_Align,    false); )
 
+DEF_BENCH( return new BigPathBench(kLeft_Align,     true); )
+DEF_BENCH( return new BigPathBench(kMiddle_Align,   true); )
+DEF_BENCH( return new BigPathBench(kRight_Align,    true); )
+