aboutsummaryrefslogtreecommitdiffhomepage
path: root/tests/BBoxHierarchyTest.cpp
blob: a562da24f89c75ce11da4942dc91503eff8e9360 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
 * Copyright 2012 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "Test.h"
#include "SkRandom.h"
#include "SkQuadTree.h"
#include "SkRTree.h"
#include "SkTSort.h"

static const size_t RTREE_MIN_CHILDREN = 6;
static const size_t RTREE_MAX_CHILDREN = 11;
static const size_t QUADTREE_MIN_CHILDREN = 4;
static const size_t QUADTREE_MAX_CHILDREN = 0; // No hard limit for quadtree

static const int NUM_RECTS = 200;
static const size_t NUM_ITERATIONS = 100;
static const size_t NUM_QUERIES = 50;

static const int MAX_SIZE = 1000;

struct DataRect {
    SkIRect rect;
    void* data;
};

static SkIRect random_rect(SkRandom& rand) {
    SkIRect rect = {0,0,0,0};
    while (rect.isEmpty()) {
        rect.fLeft   = rand.nextS() % MAX_SIZE;
        rect.fRight  = rand.nextS() % MAX_SIZE;
        rect.fTop    = rand.nextS() % MAX_SIZE;
        rect.fBottom = rand.nextS() % MAX_SIZE;
        rect.sort();
    }
    return rect;
}

static void random_data_rects(SkRandom& rand, DataRect out[], int n) {
    for (int i = 0; i < n; ++i) {
        out[i].rect = random_rect(rand);
        out[i].data = reinterpret_cast<void*>(i);
    }
}

static bool verify_query(SkIRect query, DataRect rects[],
                         SkTDArray<void*>& found) {
    SkTDArray<void*> expected;
    // manually intersect with every rectangle
    for (int i = 0; i < NUM_RECTS; ++i) {
        if (SkIRect::IntersectsNoEmptyCheck(query, rects[i].rect)) {
            expected.push(rects[i].data);
        }
    }

    if (expected.count() != found.count()) {
        return false;
    }

    if (0 == expected.count()) {
        return true;
    }

    // Just cast to long since sorting by the value of the void*'s was being problematic...
    SkTQSort(reinterpret_cast<long*>(expected.begin()),
             reinterpret_cast<long*>(expected.end() - 1));
    SkTQSort(reinterpret_cast<long*>(found.begin()),
             reinterpret_cast<long*>(found.end() - 1));
    return found == expected;
}

static void run_queries(skiatest::Reporter* reporter, SkRandom& rand, DataRect rects[],
                        SkBBoxHierarchy& tree) {
    for (size_t i = 0; i < NUM_QUERIES; ++i) {
        SkTDArray<void*> hits;
        SkIRect query = random_rect(rand);
        tree.search(query, &hits);
        REPORTER_ASSERT(reporter, verify_query(query, rects, hits));
    }
}

static void tree_test_main(SkBBoxHierarchy* tree, int minChildren, int maxChildren,
                           skiatest::Reporter* reporter) {
    DataRect rects[NUM_RECTS];
    SkRandom rand;
    REPORTER_ASSERT(reporter, NULL != tree);

    int expectedDepthMin = -1;
    int expectedDepthMax = -1;

    int tmp = NUM_RECTS;
    if (maxChildren > 0) {
        while (tmp > 0) {
            tmp -= static_cast<int>(pow(static_cast<double>(maxChildren),
                                    static_cast<double>(expectedDepthMin + 1)));
            ++expectedDepthMin;
        }
    }

    tmp = NUM_RECTS;
    if (minChildren > 0) {
        while (tmp > 0) {
            tmp -= static_cast<int>(pow(static_cast<double>(minChildren),
                                    static_cast<double>(expectedDepthMax + 1)));
            ++expectedDepthMax;
        }
    }

    for (size_t i = 0; i < NUM_ITERATIONS; ++i) {
        random_data_rects(rand, rects, NUM_RECTS);

        // First try bulk-loaded inserts
        for (int i = 0; i < NUM_RECTS; ++i) {
            tree->insert(rects[i].data, rects[i].rect, true);
        }
        tree->flushDeferredInserts();
        run_queries(reporter, rand, rects, *tree);
        REPORTER_ASSERT(reporter, NUM_RECTS == tree->getCount());
        REPORTER_ASSERT(reporter,
            ((expectedDepthMin <= 0) || (expectedDepthMin <= tree->getDepth())) &&
            ((expectedDepthMax <= 0) || (expectedDepthMax >= tree->getDepth())));
        tree->clear();
        REPORTER_ASSERT(reporter, 0 == tree->getCount());

        // Then try immediate inserts
        for (int i = 0; i < NUM_RECTS; ++i) {
            tree->insert(rects[i].data, rects[i].rect);
        }
        run_queries(reporter, rand, rects, *tree);
        REPORTER_ASSERT(reporter, NUM_RECTS == tree->getCount());
        REPORTER_ASSERT(reporter,
            ((expectedDepthMin <= 0) || (expectedDepthMin <= tree->getDepth())) &&
            ((expectedDepthMax <= 0) || (expectedDepthMax >= tree->getDepth())));
        tree->clear();
        REPORTER_ASSERT(reporter, 0 == tree->getCount());

        // And for good measure try immediate inserts, but in reversed order
        for (int i = NUM_RECTS - 1; i >= 0; --i) {
            tree->insert(rects[i].data, rects[i].rect);
        }
        run_queries(reporter, rand, rects, *tree);
        REPORTER_ASSERT(reporter, NUM_RECTS == tree->getCount());
        REPORTER_ASSERT(reporter,
            ((expectedDepthMin < 0) || (expectedDepthMin <= tree->getDepth())) &&
            ((expectedDepthMax < 0) || (expectedDepthMax >= tree->getDepth())));
        tree->clear();
        REPORTER_ASSERT(reporter, 0 == tree->getCount());
    }
}

DEF_TEST(BBoxHierarchy, reporter) {
    // RTree
    {
        SkRTree* rtree = SkRTree::Create(RTREE_MIN_CHILDREN, RTREE_MAX_CHILDREN);
        SkAutoUnref au(rtree);
        tree_test_main(rtree, RTREE_MIN_CHILDREN, RTREE_MAX_CHILDREN, reporter);

        // Rtree that orders input rectangles on deferred insert.
        SkRTree* unsortedRtree = SkRTree::Create(RTREE_MIN_CHILDREN, RTREE_MAX_CHILDREN, 1, false);
        SkAutoUnref auo(unsortedRtree);
        tree_test_main(unsortedRtree, RTREE_MIN_CHILDREN, RTREE_MAX_CHILDREN, reporter);
    }

    // QuadTree
    {
        SkQuadTree* quadtree = SkQuadTree::Create(
            SkIRect::MakeLTRB(-MAX_SIZE, -MAX_SIZE, MAX_SIZE, MAX_SIZE));
        SkAutoUnref au(quadtree);
        tree_test_main(quadtree, QUADTREE_MIN_CHILDREN, QUADTREE_MAX_CHILDREN, reporter);

        // QuadTree that orders input rectangles on deferred insert.
        SkQuadTree* unsortedQuadTree = SkQuadTree::Create(
            SkIRect::MakeLTRB(-MAX_SIZE, -MAX_SIZE, MAX_SIZE, MAX_SIZE));
        SkAutoUnref auo(unsortedQuadTree);
        tree_test_main(unsortedQuadTree, QUADTREE_MIN_CHILDREN, QUADTREE_MAX_CHILDREN, reporter);
    }
}