text: /*
   * 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 "bench/Benchmark.h"
  #include "include/core/SkCanvas.h"
  #include "include/core/SkPaint.h"
  #include "include/core/SkString.h"
  #include "include/core/SkTileMode.h"
  #include "include/effects/SkImageFilters.h"
  #include "include/utils/SkRandom.h"
  
  #include "tools/ToolUtils.h"
  
  class MatrixConvolutionBench : public Benchmark {
   public:
    MatrixConvolutionBench(bool bigKernel, SkTileMode tileMode, bool convolveAlpha)
        : fName(SkStringPrintf(
              "matrixconvolution_%s%s%s", bigKernel ? "bigKernel_" : "",
              ToolUtils::tilemode_name(tileMode), convolveAlpha ? "" : "_noConvolveAlpha")) {
      if (bigKernel) {
        SkISize kernelSize = SkISize::Make(9, 9);
        SkScalar kernel[81];
        for (int i = 0; i < 81; i++) {
          kernel[i] = SkIntToScalar(1);
        }
        kernel[40] = SkIntToScalar(-79);
        SkScalar gain = 0.3f, bias = SkIntToScalar(100);
        SkIPoint kernelOffset = SkIPoint::Make(4, 4);
        fFilter = SkImageFilters::MatrixConvolution(
            kernelSize, kernel, gain, bias, kernelOffset, tileMode, convolveAlpha, nullptr);
      } else {
        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 = SkImageFilters::MatrixConvolution(
            kernelSize, kernel, gain, bias, kernelOffset, tileMode, convolveAlpha, nullptr);
      }
    }
  
   protected:
    const char* onGetName() override { return fName.c_str(); }
  
    void onDraw(int loops, SkCanvas* canvas) override {
      SkPaint paint;
      this->setupPaint(&paint);
      paint.setImageFilter(fFilter);
      paint.setAntiAlias(true);
  
      SkRandom rand;
      for (int i = 0; i < loops; i++) {
        SkRect r = SkRect::MakeWH(rand.nextUScalar1() * 400, rand.nextUScalar1() * 400);
        canvas->drawOval(r, paint);
      }
    }
  
   private:
    sk_sp<SkImageFilter> fFilter;
    SkString fName;
  
    using INHERITED = Benchmark;
  };
  
  DEF_BENCH(return new MatrixConvolutionBench(false, SkTileMode::kClamp, true);)
  DEF_BENCH(return new MatrixConvolutionBench(false, SkTileMode::kRepeat, true);)
  DEF_BENCH(return new MatrixConvolutionBench(false, SkTileMode::kMirror, true);)
  DEF_BENCH(return new MatrixConvolutionBench(false, SkTileMode::kDecal, true);)
  DEF_BENCH(return new MatrixConvolutionBench(false, SkTileMode::kDecal, false);)
  
  DEF_BENCH(return new MatrixConvolutionBench(true, SkTileMode::kClamp, true);)
  DEF_BENCH(return new MatrixConvolutionBench(true, SkTileMode::kRepeat, true);)
  DEF_BENCH(return new MatrixConvolutionBench(true, SkTileMode::kMirror, true);)
  DEF_BENCH(return new MatrixConvolutionBench(true, SkTileMode::kDecal, true);)
  DEF_BENCH(return new MatrixConvolutionBench(true, SkTileMode::kDecal, false);)
  