1 files changed, 47 insertions, 0 deletions
diff --git a/intern/cycles/test/integrator_tile_test.cpp b/intern/cycles/test/integrator_tile_test.cpp
new file mode 100644
index 00000000000..5bb57b48c3c
--- /dev/null
+++ b/intern/cycles/test/integrator_tile_test.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2011-2021 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "testing/testing.h"
+
+#include "integrator/tile.h"
+#include "util/util_math.h"
+
+CCL_NAMESPACE_BEGIN
+
+TEST(tile_calculate_best_size, Basic)
+{
+  /* Make sure CPU-like case is handled properly. */
+  EXPECT_EQ(tile_calculate_best_size(make_int2(1920, 1080), 1, 1), TileSize(1, 1, 1));
+  EXPECT_EQ(tile_calculate_best_size(make_int2(1920, 1080), 100, 1), TileSize(1, 1, 1));
+
+  /* Enough path states to fit an entire image with all samples. */
+  EXPECT_EQ(tile_calculate_best_size(make_int2(1920, 1080), 1, 1920 * 1080),
+            TileSize(1920, 1080, 1));
+  EXPECT_EQ(tile_calculate_best_size(make_int2(1920, 1080), 100, 1920 * 1080 * 100),
+            TileSize(1920, 1080, 100));
+}
+
+TEST(tile_calculate_best_size, Extreme)
+{
+  EXPECT_EQ(tile_calculate_best_size(make_int2(32, 32), 262144, 131072), TileSize(1, 1, 512));
+  EXPECT_EQ(tile_calculate_best_size(make_int2(32, 32), 1048576, 131072), TileSize(1, 1, 1024));
+  EXPECT_EQ(tile_calculate_best_size(make_int2(32, 32), 10485760, 131072), TileSize(1, 1, 4096));
+
+  EXPECT_EQ(tile_calculate_best_size(make_int2(32, 32), 8192 * 8192 * 2, 1024),
+            TileSize(1, 1, 1024));
+}
+
+CCL_NAMESPACE_END