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
12class PerlinNoiseBench : public Benchmark {
13    SkISize fSize;
14
15public:
16    PerlinNoiseBench()  {
17        fSize = SkISize::Make(80, 80);
18    }
19
20protected:
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
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(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
58DEF_BENCH( return new PerlinNoiseBench(); )
59