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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 class MatrixConvolutionBench : public Benchmark {
     15 public:
     16     MatrixConvolutionBench(SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha)
     17         : fName("matrixconvolution") {
     18         SkISize kernelSize = SkISize::Make(3, 3);
     19         SkScalar kernel[9] = {
     20             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
     21             SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
     22             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
     23         };
     24         SkScalar gain = 0.3f, bias = SkIntToScalar(100);
     25         SkIPoint kernelOffset = SkIPoint::Make(1, 1);
     26         fFilter = SkMatrixConvolutionImageFilter::Create(kernelSize, kernel, gain, bias, kernelOffset, tileMode, convolveAlpha);
     27     }
     28 
     29     ~MatrixConvolutionBench() {
     30         fFilter->unref();
     31     }
     32 
     33 protected:
     34     virtual const char* onGetName() {
     35         return fName.c_str();
     36     }
     37 
     38     virtual void onDraw(const int loops, SkCanvas* canvas) {
     39         SkPaint paint;
     40         this->setupPaint(&paint);
     41         paint.setAntiAlias(true);
     42         SkRandom rand;
     43         for (int i = 0; i < loops; i++) {
     44             SkRect r = SkRect::MakeWH(rand.nextUScalar1() * 400,
     45                                       rand.nextUScalar1() * 400);
     46             paint.setImageFilter(fFilter);
     47             canvas->drawOval(r, paint);
     48         }
     49     }
     50 
     51 private:
     52     typedef Benchmark INHERITED;
     53     SkMatrixConvolutionImageFilter* fFilter;
     54     SkString fName;
     55 };
     56 
     57 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClamp_TileMode, true); )
     58 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); )
     59 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); )
     60 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false); )
     61