/*
 * 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