Change random number generator for tests to SkMWCRandom

tests/RTreeTest.cpp

 
 /*
  * 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(SkRandom& rand) {
+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(SkRandom& rand, DataRect out[], int n) {
+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
@@ skipping 12 matching lines @@
     }
 
     // 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, SkRandom& rand, DataRect rects[],
+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];
-    SkRandom rand;
+    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),
@@ skipping 42 matching lines @@
         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)