star-sf

Set of surface and volume scattering functions
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test_ssf_blinn_distribution.c (2706B)

      1 /* Copyright (C) 2016-2018, 2021-2025 |Méso|Star> (contact@meso-star.com)
      2  *
      3  * This program is free software: you can redistribute it and/or modify
      4  * it under the terms of the GNU General Public License as published by
      5  * the Free Software Foundation, either version 3 of the License, or
      6  * (at your option) any later version.
      7  *
      8  * This program is distributed in the hope that it will be useful,
      9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
     11  * GNU General Public License for more details.
     12  *
     13  * You should have received a copy of the GNU General Public License
     14  * along with this program. If not, see <http://www.gnu.org/licenses/>. */
     15 
     16 #define _POSIX_C_SOURCE 200112L /* nextafter support */
     17 
     18 #include "ssf.h"
     19 #include "test_ssf_utils.h"
     20 
     21 int
     22 main(int argc, char** argv)
     23 {
     24   struct mem_allocator allocator;
     25   struct ssp_rng* rng;
     26   struct ssf_microfacet_distribution* distrib;
     27   struct ssf_microfacet_distribution* dummy;
     28   const size_t NTESTS = 5;
     29   size_t itest;
     30   (void)argc, (void)argv;
     31 
     32   mem_init_proxy_allocator(&allocator, &mem_default_allocator);
     33   CHK(ssp_rng_create(&allocator, SSP_RNG_THREEFRY, &rng) == RES_OK);
     34 
     35   CHK(ssf_microfacet_distribution_create
     36     (&allocator, &ssf_blinn_distribution, &distrib) == RES_OK);
     37   CHK(ssf_microfacet_distribution_create
     38     (&allocator, &microfacet_dummy, &dummy) == RES_OK);
     39 
     40   CHK(ssf_blinn_distribution_setup(NULL, -1) == RES_BAD_ARG);
     41   CHK(ssf_blinn_distribution_setup(distrib, -1) == RES_BAD_ARG);
     42   CHK(ssf_blinn_distribution_setup(NULL, 8) == RES_BAD_ARG);
     43   CHK(ssf_blinn_distribution_setup(distrib, 8) == RES_OK);
     44   CHK(ssf_blinn_distribution_setup(distrib, 0) == RES_OK);
     45   CHK(ssf_blinn_distribution_setup(dummy, 0) == RES_BAD_ARG);
     46 
     47   CHK(ssf_blinn_distribution_setup
     48     (distrib, SSF_BLINN_DISTRIBUTION_MAX_EXPONENT) ==RES_OK);
     49   CHK(ssf_blinn_distribution_setup
     50     (distrib, nextafter(SSF_BLINN_DISTRIBUTION_MAX_EXPONENT, DBL_MAX)) ==
     51      RES_BAD_ARG);
     52   CHK(ssf_blinn_distribution_setup(distrib, nextafter(0,-1)) == RES_BAD_ARG);
     53   CHK(ssf_blinn_distribution_setup(distrib, 32.32) == RES_OK);
     54 
     55   FOR_EACH(itest, 0, NTESTS) {
     56     const double exponent = ssp_rng_uniform_double
     57       (rng, 0, SSF_BLINN_DISTRIBUTION_MAX_EXPONENT);
     58     CHK(ssf_blinn_distribution_setup(distrib, exponent) == RES_OK);
     59     check_microfacet_distribution(distrib, rng);
     60   }
     61 
     62   CHK(ssf_microfacet_distribution_ref_put(distrib) == RES_OK);
     63   CHK(ssf_microfacet_distribution_ref_put(dummy) == RES_OK);
     64   CHK(ssp_rng_ref_put(rng) == RES_OK);
     65 
     66   check_memory_allocator(&allocator);
     67   mem_shutdown_proxy_allocator(&allocator);
     68   CHK(mem_allocated_size() == 0);
     69   return 0;
     70 }