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      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:
     16     PerlinNoiseBench()  {
     17         fSize = SkISize::Make(80, 80);
     18     }
     19 
     20 protected:
     21     const char* onGetName() override {
     22         return "perlinnoise";
     23     }
     24 
     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:
     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 
     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