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
11class PerlinNoiseBench : public Benchmark {
12    SkISize fSize;
13
14public:
15    PerlinNoiseBench()  {
16        fSize = SkISize::Make(80, 80);
17    }
18
19protected:
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
29private:
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
62DEF_BENCH( return new PerlinNoiseBench(); )
63