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Diffstat (limited to 'intern/cycles/test/integrator_adaptive_sampling_test.cpp')
-rw-r--r-- | intern/cycles/test/integrator_adaptive_sampling_test.cpp | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/intern/cycles/test/integrator_adaptive_sampling_test.cpp b/intern/cycles/test/integrator_adaptive_sampling_test.cpp new file mode 100644 index 00000000000..3ed6a23125d --- /dev/null +++ b/intern/cycles/test/integrator_adaptive_sampling_test.cpp @@ -0,0 +1,116 @@ +/* + * 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/adaptive_sampling.h" +#include "util/util_vector.h" + +CCL_NAMESPACE_BEGIN + +TEST(AdaptiveSampling, schedule_samples) +{ + AdaptiveSampling adaptive_sampling; + adaptive_sampling.use = true; + adaptive_sampling.min_samples = 0; + adaptive_sampling.adaptive_step = 4; + + for (int sample = 2; sample < 32; ++sample) { + for (int num_samples = 8; num_samples < 32; ++num_samples) { + const int num_samples_aligned = adaptive_sampling.align_samples(sample, num_samples); + /* NOTE: `sample + num_samples_aligned` is the number of samples after rendering, so need + * to convert this to the 0-based index of the last sample. */ + EXPECT_TRUE(adaptive_sampling.need_filter(sample + num_samples_aligned - 1)); + } + } +} + +TEST(AdaptiveSampling, align_samples) +{ + AdaptiveSampling adaptive_sampling; + adaptive_sampling.use = true; + adaptive_sampling.min_samples = 11 /* rounded of sqrt(128) */; + adaptive_sampling.adaptive_step = 4; + + /* Filtering will happen at the following samples: + * 15, 19, 23, 27, 31, 35, 39, 43 */ + + /* Requested sample and number of samples will result in number of samples lower than + * `min_samples`. */ + EXPECT_EQ(adaptive_sampling.align_samples(0, 4), 4); + EXPECT_EQ(adaptive_sampling.align_samples(0, 7), 7); + + /* Request number of samples higher than the minimum samples before filter, but prior to the + * first sample at which filtering will happen. */ + EXPECT_EQ(adaptive_sampling.align_samples(0, 15), 15); + + /* When rendering many samples from the very beginning, limit number of samples by the first + * sample at which filtering is to happen. */ + EXPECT_EQ(adaptive_sampling.align_samples(0, 16), 16); + EXPECT_EQ(adaptive_sampling.align_samples(0, 17), 16); + EXPECT_EQ(adaptive_sampling.align_samples(0, 20), 16); + EXPECT_EQ(adaptive_sampling.align_samples(0, 60), 16); + + /* Similar to above, but start sample is not 0. */ + EXPECT_EQ(adaptive_sampling.align_samples(9, 8), 7); + EXPECT_EQ(adaptive_sampling.align_samples(9, 20), 7); + EXPECT_EQ(adaptive_sampling.align_samples(9, 60), 7); + + /* Start sample is past the minimum required samples, but prior to the first filter sample. */ + EXPECT_EQ(adaptive_sampling.align_samples(12, 6), 4); + EXPECT_EQ(adaptive_sampling.align_samples(12, 20), 4); + EXPECT_EQ(adaptive_sampling.align_samples(12, 60), 4); + + /* Start sample is the sample which is to be filtered. */ + EXPECT_EQ(adaptive_sampling.align_samples(15, 4), 1); + EXPECT_EQ(adaptive_sampling.align_samples(15, 6), 1); + EXPECT_EQ(adaptive_sampling.align_samples(15, 10), 1); + EXPECT_EQ(adaptive_sampling.align_samples(58, 2), 2); + + /* Start sample is past the sample which is to be filtered. */ + EXPECT_EQ(adaptive_sampling.align_samples(16, 3), 3); + EXPECT_EQ(adaptive_sampling.align_samples(16, 4), 4); + EXPECT_EQ(adaptive_sampling.align_samples(16, 5), 4); + EXPECT_EQ(adaptive_sampling.align_samples(16, 10), 4); + + /* Should never exceed requested number of samples. */ + EXPECT_EQ(adaptive_sampling.align_samples(15, 2), 1); + EXPECT_EQ(adaptive_sampling.align_samples(16, 2), 2); + EXPECT_EQ(adaptive_sampling.align_samples(17, 2), 2); + EXPECT_EQ(adaptive_sampling.align_samples(18, 2), 2); +} + +TEST(AdaptiveSampling, need_filter) +{ + AdaptiveSampling adaptive_sampling; + adaptive_sampling.use = true; + adaptive_sampling.min_samples = 11 /* rounded of sqrt(128) */; + adaptive_sampling.adaptive_step = 4; + + const vector<int> expected_samples_to_filter = { + {15, 19, 23, 27, 31, 35, 39, 43, 47, 51, 55, 59}}; + + vector<int> actual_samples_to_filter; + for (int sample = 0; sample < 60; ++sample) { + if (adaptive_sampling.need_filter(sample)) { + actual_samples_to_filter.push_back(sample); + } + } + + EXPECT_EQ(actual_samples_to_filter, expected_samples_to_filter); +} + +CCL_NAMESPACE_END |