ImageCacheBench.cpp revision c289743864e2ab926a95e617a5cd1d29b26d1825 
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
8#include "SkBenchmark.h"
9#include "SkScaledImageCache.h"
10
11class ImageCacheBench : public SkBenchmark {
12    SkScaledImageCache  fCache;
13    SkBitmap            fBM;
14
15    enum {
16        DIM = 1,
17        CACHE_COUNT = 500
18    };
19public:
20    ImageCacheBench(void* param) : INHERITED(param) , fCache(CACHE_COUNT * 100) {
21        fBM.setConfig(SkBitmap::kARGB_8888_Config, DIM, DIM);
22        fBM.allocPixels();
23    }
24
25    void populateCache() {
26        SkScalar scale = 1;
27        for (int i = 0; i < CACHE_COUNT; ++i) {
28            SkBitmap tmp;
29            tmp.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
30            tmp.allocPixels();
31            fCache.unlock(fCache.addAndLock(fBM, scale, scale, tmp));
32            scale += 1;
33        }
34    }
35
36protected:
37    virtual const char* onGetName() SK_OVERRIDE {
38        return "imagecache";
39    }
40
41    virtual void onDraw(SkCanvas*) SK_OVERRIDE {
42        if (fCache.getBytesUsed() == 0) {
43            this->populateCache();
44        }
45
46        SkBitmap tmp;
47        // search for a miss (-1 scale)
48        for (int i = 0; i < this->getLoops(); ++i) {
49            (void)fCache.findAndLock(fBM, -1, -1, &tmp);
50        }
51    }
52
53private:
54    typedef SkBenchmark INHERITED;
55};
56
57///////////////////////////////////////////////////////////////////////////////
58
59DEF_BENCH( return new ImageCacheBench(p); )
60