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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 
     11 class PerlinNoiseBench : public Benchmark {
     12     SkISize fSize;
     13 
     14 public:
     15     PerlinNoiseBench()  {
     16         fSize = SkISize::Make(80, 80);
     17     }
     18 
     19 protected:
     20     virtual const char* onGetName() SK_OVERRIDE {
     21         return "perlinnoise";
     22     }
     23 
     24     virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
     25         this->test(loops, canvas, 0, 0, SkPerlinNoiseShader::kFractalNoise_Type,
     26                    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(const int loops, SkCanvas* canvas, int x, int y, SkPerlinNoiseShader::Type type,
     42               float baseFrequencyX, float baseFrequencyY, int numOctaves, float seed,
     43               bool stitchTiles) {
     44         SkShader* shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ?
     45             SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves,
     46                                                     seed, stitchTiles ? &fSize : NULL) :
     47             SkPerlinNoiseShader::CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves,
     48                                                  seed, stitchTiles ? &fSize : NULL);
     49         SkPaint paint;
     50         paint.setShader(shader)->unref();
     51 
     52         for (int i = 0; i < loops; i++) {
     53             this->drawClippedRect(canvas, x, y, paint);
     54         }
     55     }
     56 
     57     typedef Benchmark INHERITED;
     58 };
     59 
     60 ///////////////////////////////////////////////////////////////////////////////
     61 
     62 DEF_BENCH( return new PerlinNoiseBench(); )
     63