1 files changed, 75 insertions, 0 deletions
diff --git a/Source/ThirdParty/ANGLE/util/random_utils.cpp b/Source/ThirdParty/ANGLE/util/random_utils.cpp
new file mode 100644
index 000000000..2968a3f91
--- /dev/null
+++ b/Source/ThirdParty/ANGLE/util/random_utils.cpp
@@ -0,0 +1,75 @@
+//
+// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// random_utils:
+//   Helper functions for random number generation.
+//
+
+#include "random_utils.h"
+
+#include <chrono>
+
+#include <cstdlib>
+
+namespace angle
+{
+
+// Seed from clock
+RNG::RNG()
+{
+    long long timeSeed = std::chrono::system_clock::now().time_since_epoch().count();
+    mGenerator.seed(static_cast<unsigned int>(timeSeed));
+}
+
+// Seed from fixed number.
+RNG::RNG(unsigned int seed) : mGenerator(seed)
+{
+}
+
+RNG::~RNG()
+{
+}
+
+void RNG::reseed(unsigned int newSeed)
+{
+    mGenerator.seed(newSeed);
+}
+
+int RNG::randomInt()
+{
+    std::uniform_int_distribution<int> intDistribution;
+    return intDistribution(mGenerator);
+}
+
+int RNG::randomIntBetween(int min, int max)
+{
+    std::uniform_int_distribution<int> intDistribution(min, max);
+    return intDistribution(mGenerator);
+}
+
+unsigned int RNG::randomUInt()
+{
+    std::uniform_int_distribution<unsigned int> uintDistribution;
+    return uintDistribution(mGenerator);
+}
+
+float RNG::randomFloat()
+{
+    std::uniform_real_distribution<float> floatDistribution;
+    return floatDistribution(mGenerator);
+}
+
+float RNG::randomFloatBetween(float min, float max)
+{
+    std::uniform_real_distribution<float> floatDistribution(min, max);
+    return floatDistribution(mGenerator);
+}
+
+float RNG::randomNegativeOneToOne()
+{
+    return randomFloatBetween(-1.0f, 1.0f);
+}
+
+}  // namespace angle