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/*
* 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 "SkRTree.h"
#include "SkTSort.h"
static const size_t MIN_CHILDREN = 6;
static const size_t MAX_CHILDREN = 11;
static const int NUM_RECTS = 200;
static const size_t NUM_ITERATIONS = 100;
static const size_t NUM_QUERIES = 50;
struct DataRect {
SkIRect rect;
void* data;
};
static SkIRect random_rect(SkMWCRandom& rand) {
SkIRect rect = {0,0,0,0};
while (rect.isEmpty()) {
rect.fLeft = rand.nextS() % 1000;
rect.fRight = rand.nextS() % 1000;
rect.fTop = rand.nextS() % 1000;
rect.fBottom = rand.nextS() % 1000;
rect.sort();
}
return rect;
}
static void random_data_rects(SkMWCRandom& 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 runQueries(skiatest::Reporter* reporter, SkMWCRandom& rand, DataRect rects[],
SkRTree& 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 TestRTree(skiatest::Reporter* reporter) {
DataRect rects[NUM_RECTS];
SkMWCRandom rand;
SkRTree* rtree = SkRTree::Create(MIN_CHILDREN, MAX_CHILDREN);
SkAutoUnref au(rtree);
REPORTER_ASSERT(reporter, NULL != rtree);
int expectedDepthMin = -1;
int expectedDepthMax = -1;
int tmp = NUM_RECTS;
while (tmp > 0) {
tmp -= static_cast<int>(pow(static_cast<double>(MAX_CHILDREN),
static_cast<double>(expectedDepthMin + 1)));
++expectedDepthMin;
}
tmp = NUM_RECTS;
while (tmp > 0) {
tmp -= static_cast<int>(pow(static_cast<double>(MIN_CHILDREN),
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) {
rtree->insert(rects[i].data, rects[i].rect, true);
}
rtree->flushDeferredInserts();
runQueries(reporter, rand, rects, *rtree);
REPORTER_ASSERT(reporter, NUM_RECTS == rtree->getCount());
REPORTER_ASSERT(reporter, expectedDepthMin <= rtree->getDepth() &&
expectedDepthMax >= rtree->getDepth());
rtree->clear();
REPORTER_ASSERT(reporter, 0 == rtree->getCount());
// Then try immediate inserts
for (int i = 0; i < NUM_RECTS; ++i) {
rtree->insert(rects[i].data, rects[i].rect);
}
runQueries(reporter, rand, rects, *rtree);
REPORTER_ASSERT(reporter, NUM_RECTS == rtree->getCount());
REPORTER_ASSERT(reporter, expectedDepthMin <= rtree->getDepth() &&
expectedDepthMax >= rtree->getDepth());
rtree->clear();
REPORTER_ASSERT(reporter, 0 == rtree->getCount());
// And for good measure try immediate inserts, but in reversed order
for (int i = NUM_RECTS - 1; i >= 0; --i) {
rtree->insert(rects[i].data, rects[i].rect);
}
runQueries(reporter, rand, rects, *rtree);
REPORTER_ASSERT(reporter, NUM_RECTS == rtree->getCount());
REPORTER_ASSERT(reporter, expectedDepthMin <= rtree->getDepth() &&
expectedDepthMax >= rtree->getDepth());
rtree->clear();
REPORTER_ASSERT(reporter, 0 == rtree->getCount());
}
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("RTree", RTreeTestClass, TestRTree)
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