ImageCacheTest.cpp revision d6bab0238655dbab24dfe92bd0b16b464310a8c7 
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 "Test.h"
9#include "SkScaledImageCache.h"
10
11static void make_bm(SkBitmap* bm, int w, int h) {
12    bm->setConfig(SkBitmap::kARGB_8888_Config, w, h);
13    bm->allocPixels();
14}
15
16static void TestImageCache(skiatest::Reporter* reporter) {
17    static const int COUNT = 10;
18    static const int DIM = 256;
19    static const size_t defLimit = DIM * DIM * 4 * COUNT + 1024;    // 1K slop
20    SkScaledImageCache cache(defLimit);
21    SkScaledImageCache::ID* id;
22
23    SkBitmap bm[COUNT];
24
25    SkScalar scale = 2;
26    for (int i = 0; i < COUNT; ++i) {
27        SkBitmap tmp;
28
29        make_bm(&bm[i], DIM, DIM);
30        id = cache.findAndLock(bm[i], scale, scale, &tmp);
31        REPORTER_ASSERT(reporter, NULL == id);
32
33        make_bm(&tmp, DIM, DIM);
34        id = cache.addAndLock(bm[i], scale, scale, tmp);
35        REPORTER_ASSERT(reporter, NULL != id);
36
37        SkBitmap tmp2;
38        SkScaledImageCache::ID* id2 = cache.findAndLock(bm[i], scale, scale,
39                                                        &tmp2);
40        REPORTER_ASSERT(reporter, id == id2);
41        REPORTER_ASSERT(reporter, tmp.pixelRef() == tmp2.pixelRef());
42        REPORTER_ASSERT(reporter, tmp.width() == tmp2.width());
43        REPORTER_ASSERT(reporter, tmp.height() == tmp2.height());
44        cache.unlock(id2);
45
46        cache.unlock(id);
47    }
48
49    // stress test, should trigger purges
50    for (size_t i = 0; i < COUNT * 100; ++i) {
51        scale += 1;
52
53        SkBitmap tmp;
54
55        make_bm(&tmp, DIM, DIM);
56        id = cache.addAndLock(bm[0], scale, scale, tmp);
57        REPORTER_ASSERT(reporter, NULL != id);
58        cache.unlock(id);
59    }
60
61    cache.setByteLimit(0);
62}
63
64#include "TestClassDef.h"
65DEFINE_TESTCLASS("ImageCache", TestImageCacheClass, TestImageCache)
66
67DEF_TEST(ImageCache_doubleAdd, r) {
68    // Adding the same key twice should be safe.
69    SkScaledImageCache cache(1024);
70
71    SkBitmap original;
72    original.setConfig(SkBitmap::kARGB_8888_Config, 40, 40);
73    original.allocPixels();
74
75    SkBitmap scaled;
76    scaled.setConfig(SkBitmap::kARGB_8888_Config, 20, 20);
77    scaled.allocPixels();
78
79    SkScaledImageCache::ID* id1 = cache.addAndLock(original, 0.5f, 0.5f, scaled);
80    SkScaledImageCache::ID* id2 = cache.addAndLock(original, 0.5f, 0.5f, scaled);
81    // We don't really care if id1 == id2 as long as unlocking both works.
82    cache.unlock(id1);
83    cache.unlock(id2);
84}
85