distinguish distinct matrixconvolution benchmarks

bench/MatrixConvolutionBench.cpp

 /*
  * Copyright 2012 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 "SkMatrixConvolutionImageFilter.h"
 #include "SkPaint.h"
 #include "SkRandom.h"
 #include "SkString.h"
 
+static const char* name(SkMatrixConvolutionImageFilter::TileMode mode) {
+    switch (mode) {
+        case SkMatrixConvolutionImageFilter::kClamp_TileMode:        return "clamp";
+        case SkMatrixConvolutionImageFilter::kRepeat_TileMode:       return "repeat";
+        case SkMatrixConvolutionImageFilter::kClampToBlack_TileMode: return "clampToBlack";
+    }
+    return "oops";
+}
+
 class MatrixConvolutionBench : public Benchmark {
 public:
     MatrixConvolutionBench(SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha)
-        : fName("matrixconvolution") {
+        : fName(SkStringPrintf("matrixconvolution_%s%s",
+                               name(tileMode),
+                               convolveAlpha ? "" : "_noConvolveAlpha")) {
         SkISize kernelSize = SkISize::Make(3, 3);
         SkScalar kernel[9] = {
             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
             SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
         };
         SkScalar gain = 0.3f, bias = SkIntToScalar(100);
         SkIPoint kernelOffset = SkIPoint::Make(1, 1);
-        fFilter = SkMatrixConvolutionImageFilter::Make(kernelSize, kernel, gain, bias, 
+        fFilter = SkMatrixConvolutionImageFilter::Make(kernelSize, kernel, gain, bias,
                                                        kernelOffset, tileMode, convolveAlpha,
                                                        nullptr);
     }
 
 protected:
     virtual const char* onGetName() {
         return fName.c_str();
     }
 
     virtual void onDraw(int loops, SkCanvas* canvas) {
@@ skipping 13 matching lines @@
     sk_sp<SkImageFilter> fFilter;
     SkString fName;
 
     typedef Benchmark INHERITED;
 };
 
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClamp_TileMode, true); )
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); )
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); )
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false); )