RTreeTest.cpp revision 1f45e934b68a5985b2127ec871ff593c3bfc7c2e
1 2/* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9#include "Test.h" 10#include "SkRandom.h" 11#include "SkRTree.h" 12#include "SkTSort.h" 13 14static const size_t MIN_CHILDREN = 6; 15static const size_t MAX_CHILDREN = 11; 16 17static const size_t NUM_RECTS = 200; 18static const size_t NUM_ITERATIONS = 100; 19static const size_t NUM_QUERIES = 50; 20 21struct DataRect { 22 SkIRect rect; 23 void* data; 24}; 25 26static SkIRect random_rect(SkRandom& rand) { 27 SkIRect rect = {0,0,0,0}; 28 while (rect.isEmpty()) { 29 rect.fLeft = rand.nextS() % 1000; 30 rect.fRight = rand.nextS() % 1000; 31 rect.fTop = rand.nextS() % 1000; 32 rect.fBottom = rand.nextS() % 1000; 33 rect.sort(); 34 } 35 return rect; 36} 37 38static void random_data_rects(SkRandom& rand, DataRect out[], int n) { 39 for (int i = 0; i < n; ++i) { 40 out[i].rect = random_rect(rand); 41 out[i].data = reinterpret_cast<void*>(i); 42 } 43} 44 45static bool verify_query(SkIRect query, DataRect rects[], 46 SkTDArray<void*>& found) { 47 SkTDArray<void*> expected; 48 // manually intersect with every rectangle 49 for (int i = 0; i < NUM_RECTS; ++i) { 50 if (SkIRect::IntersectsNoEmptyCheck(query, rects[i].rect)) { 51 expected.push(rects[i].data); 52 } 53 } 54 55 if (expected.count() != found.count()) { 56 return false; 57 } 58 59 if (0 == expected.count()) { 60 return true; 61 } 62 63 // Just cast to long since sorting by the value of the void*'s was being problematic... 64 SkTQSort(reinterpret_cast<long*>(expected.begin()), 65 reinterpret_cast<long*>(expected.end() - 1)); 66 SkTQSort(reinterpret_cast<long*>(found.begin()), 67 reinterpret_cast<long*>(found.end() - 1)); 68 return found == expected; 69} 70 71static void runQueries(skiatest::Reporter* reporter, SkRandom& rand, DataRect rects[], 72 SkRTree& tree) { 73 for (int i = 0; i < NUM_QUERIES; ++i) { 74 SkTDArray<void*> hits; 75 SkIRect query = random_rect(rand); 76 tree.search(query, &hits); 77 REPORTER_ASSERT(reporter, verify_query(query, rects, hits)); 78 } 79} 80 81static void TestRTree(skiatest::Reporter* reporter) { 82 DataRect rects[NUM_RECTS]; 83 SkRandom rand; 84 SkRTree* rtree = SkRTree::Create(MIN_CHILDREN, MAX_CHILDREN); 85 REPORTER_ASSERT(reporter, NULL != rtree); 86 87 int expectedDepthMin = -1; 88 int expectedDepthMax = -1; 89 90 int tmp = NUM_RECTS; 91 while (tmp > 0) { 92 tmp -= static_cast<int>(pow(static_cast<double>(MAX_CHILDREN), 93 static_cast<double>(expectedDepthMin + 1))); 94 ++expectedDepthMin; 95 } 96 97 tmp = NUM_RECTS; 98 while (tmp > 0) { 99 tmp -= static_cast<int>(pow(static_cast<double>(MIN_CHILDREN), 100 static_cast<double>(expectedDepthMax + 1))); 101 ++expectedDepthMax; 102 } 103 104 for (int i = 0; i < NUM_ITERATIONS; ++i) { 105 random_data_rects(rand, rects, NUM_RECTS); 106 107 // First try bulk-loaded inserts 108 for (int i = 0; i < NUM_RECTS; ++i) { 109 rtree->insert(rects[i].data, rects[i].rect, true); 110 } 111 rtree->flushDeferredInserts(); 112 runQueries(reporter, rand, rects, *rtree); 113 REPORTER_ASSERT(reporter, NUM_RECTS == rtree->getCount()); 114 REPORTER_ASSERT(reporter, expectedDepthMin <= rtree->getDepth() && 115 expectedDepthMax >= rtree->getDepth()); 116 rtree->clear(); 117 REPORTER_ASSERT(reporter, 0 == rtree->getCount()); 118 119 // Then try immediate inserts 120 for (int i = 0; i < NUM_RECTS; ++i) { 121 rtree->insert(rects[i].data, rects[i].rect); 122 } 123 runQueries(reporter, rand, rects, *rtree); 124 REPORTER_ASSERT(reporter, NUM_RECTS == rtree->getCount()); 125 REPORTER_ASSERT(reporter, expectedDepthMin <= rtree->getDepth() && 126 expectedDepthMax >= rtree->getDepth()); 127 rtree->clear(); 128 REPORTER_ASSERT(reporter, 0 == rtree->getCount()); 129 130 // And for good measure try immediate inserts, but in reversed order 131 for (int i = NUM_RECTS - 1; i >= 0; --i) { 132 rtree->insert(rects[i].data, rects[i].rect); 133 } 134 runQueries(reporter, rand, rects, *rtree); 135 REPORTER_ASSERT(reporter, NUM_RECTS == rtree->getCount()); 136 REPORTER_ASSERT(reporter, expectedDepthMin <= rtree->getDepth() && 137 expectedDepthMax >= rtree->getDepth()); 138 rtree->clear(); 139 REPORTER_ASSERT(reporter, 0 == rtree->getCount()); 140 } 141} 142 143#include "TestClassDef.h" 144DEFINE_TESTCLASS("RTree", RTreeTestClass, TestRTree) 145