1 /* 2 * Copyright 2013 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 "SkPerlinNoiseShader.h" 10 #include "SkShader.h" 11 12 class PerlinNoiseBench : public Benchmark { 13 SkISize fSize; 14 15 public: PerlinNoiseBench()16 PerlinNoiseBench() { 17 fSize = SkISize::Make(80, 80); 18 } 19 20 protected: onGetName()21 const char* onGetName() override { 22 return "perlinnoise"; 23 } 24 onDraw(int loops,SkCanvas * canvas)25 void onDraw(int loops, SkCanvas* canvas) override { 26 this->test(loops, canvas, 0, 0, 0.1f, 0.1f, 3, 0, false); 27 } 28 29 private: drawClippedRect(SkCanvas * canvas,int x,int y,const SkPaint & paint)30 void drawClippedRect(SkCanvas* canvas, int x, int y, const SkPaint& paint) { 31 canvas->save(); 32 canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), 33 SkIntToScalar(fSize.width()), SkIntToScalar(fSize.height()))); 34 SkRect r = SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), 35 SkIntToScalar(fSize.width()), 36 SkIntToScalar(fSize.height())); 37 canvas->drawRect(r, paint); 38 canvas->restore(); 39 } 40 test(int loops,SkCanvas * canvas,int x,int y,float baseFrequencyX,float baseFrequencyY,int numOctaves,float seed,bool stitchTiles)41 void test(int loops, SkCanvas* canvas, int x, int y, 42 float baseFrequencyX, float baseFrequencyY, int numOctaves, float seed, 43 bool stitchTiles) { 44 SkPaint paint; 45 paint.setShader(SkPerlinNoiseShader::MakeFractalNoise(baseFrequencyX, baseFrequencyY, 46 numOctaves, seed, 47 stitchTiles ? &fSize : nullptr)); 48 for (int i = 0; i < loops; i++) { 49 this->drawClippedRect(canvas, x, y, paint); 50 } 51 } 52 53 typedef Benchmark INHERITED; 54 }; 55 56 /////////////////////////////////////////////////////////////////////////////// 57 58 DEF_BENCH( return new PerlinNoiseBench(); ) 59