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      1 /*
      2  * Copyright 2012 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 #include "Benchmark.h"
      8 #include "SkCanvas.h"
      9 #include "SkMatrixConvolutionImageFilter.h"
     10 #include "SkPaint.h"
     11 #include "SkRandom.h"
     12 #include "SkString.h"
     13 
     14 static const char* name(SkMatrixConvolutionImageFilter::TileMode mode) {
     15     switch (mode) {
     16         case SkMatrixConvolutionImageFilter::kClamp_TileMode:        return "clamp";
     17         case SkMatrixConvolutionImageFilter::kRepeat_TileMode:       return "repeat";
     18         case SkMatrixConvolutionImageFilter::kClampToBlack_TileMode: return "clampToBlack";
     19     }
     20     return "oops";
     21 }
     22 
     23 class MatrixConvolutionBench : public Benchmark {
     24 public:
     25     MatrixConvolutionBench(SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha)
     26         : fName(SkStringPrintf("matrixconvolution_%s%s",
     27                                name(tileMode),
     28                                convolveAlpha ? "" : "_noConvolveAlpha")) {
     29         SkISize kernelSize = SkISize::Make(3, 3);
     30         SkScalar kernel[9] = {
     31             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
     32             SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
     33             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
     34         };
     35         SkScalar gain = 0.3f, bias = SkIntToScalar(100);
     36         SkIPoint kernelOffset = SkIPoint::Make(1, 1);
     37         fFilter = SkMatrixConvolutionImageFilter::Make(kernelSize, kernel, gain, bias,
     38                                                        kernelOffset, tileMode, convolveAlpha,
     39                                                        nullptr);
     40     }
     41 
     42 protected:
     43     virtual const char* onGetName() {
     44         return fName.c_str();
     45     }
     46 
     47     virtual void onDraw(int loops, SkCanvas* canvas) {
     48         SkPaint paint;
     49         this->setupPaint(&paint);
     50         paint.setAntiAlias(true);
     51         SkRandom rand;
     52         for (int i = 0; i < loops; i++) {
     53             SkRect r = SkRect::MakeWH(rand.nextUScalar1() * 400,
     54                                       rand.nextUScalar1() * 400);
     55             paint.setImageFilter(fFilter);
     56             canvas->drawOval(r, paint);
     57         }
     58     }
     59 
     60 private:
     61     sk_sp<SkImageFilter> fFilter;
     62     SkString fName;
     63 
     64     typedef Benchmark INHERITED;
     65 };
     66 
     67 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClamp_TileMode, true); )
     68 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); )
     69 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); )
     70 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false); )
     71