Added check and warning about non-power-of-2 textures

2 files changed, 56 insertions, 0 deletions

diff --git a/test/unit/CMakeLists.txt b/test/unit/CMakeLists.txt
index df92b9c..b7051fb 100644
--- a/test/unit/CMakeLists.txt
+++ b/test/unit/CMakeLists.txt
@@ -177,6 +177,7 @@ set(UT_SOURCES
 main.cpp
 app/app_test.cpp
 graphics/engine/lightman_test.cpp
+math/func_test.cpp
 math/geometry_test.cpp
 math/matrix_test.cpp
 math/vector_test.cpp
diff --git a/test/unit/math/func_test.cpp b/test/unit/math/func_test.cpp
new file mode 100644
index 0000000..00a564b
--- /dev/null
+++ b/test/unit/math/func_test.cpp
@@ -0,0 +1,55 @@
+// * This file is part of the COLOBOT source code
+// * Copyright (C) 2012, Polish Portal of Colobot (PPC)
+// *
+// * This program is free software: you can redistribute it and/or modify
+// * it under the terms of the GNU General Public License as published by
+// * the Free Software Foundation, either version 3 of the License, or
+// * (at your option) any later version.
+// *
+// * This program is distributed in the hope that it will be useful,
+// * but WITHOUT ANY WARRANTY; without even the implied warranty of
+// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// * GNU General Public License for more details.
+// *
+// * You should have received a copy of the GNU General Public License
+// * along with this program. If not, see  http://www.gnu.org/licenses/.
+
+/*
+  Unit tests for math functions.
+ */
+
+#include "math/func.h"
+
+#include "gtest/gtest.h"
+
+
+TEST(IsPowerOfTwo, TestDifferentValues)
+{
+    EXPECT_FALSE(Math::IsPowerOfTwo(0));
+    EXPECT_TRUE(Math::IsPowerOfTwo(1));
+    EXPECT_TRUE(Math::IsPowerOfTwo(2));
+    EXPECT_FALSE(Math::IsPowerOfTwo(3));
+    EXPECT_TRUE(Math::IsPowerOfTwo(4));
+
+    EXPECT_FALSE(Math::IsPowerOfTwo(31));
+    EXPECT_TRUE(Math::IsPowerOfTwo(32));
+    EXPECT_FALSE(Math::IsPowerOfTwo(33));
+
+    EXPECT_FALSE(Math::IsPowerOfTwo(1234));
+}
+
+TEST(NextPowerOfTwo, TestDifferentValues)
+{
+    EXPECT_EQ(2, Math::NextPowerOfTwo(2));
+    EXPECT_EQ(4, Math::NextPowerOfTwo(3));
+    EXPECT_EQ(4, Math::NextPowerOfTwo(4));
+    EXPECT_EQ(8, Math::NextPowerOfTwo(5));
+
+    EXPECT_EQ(8, Math::NextPowerOfTwo(7));
+    EXPECT_EQ(8, Math::NextPowerOfTwo(8));
+    EXPECT_EQ(16, Math::NextPowerOfTwo(9));
+
+    EXPECT_EQ(32, Math::NextPowerOfTwo(31));
+    EXPECT_EQ(32, Math::NextPowerOfTwo(32));
+    EXPECT_EQ(64, Math::NextPowerOfTwo(33));
+}