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/*
* Copyright 2011-2017 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.
*/
CCL_NAMESPACE_BEGIN
/* This kernel evaluates ShaderData structure from the values computed
* by the previous kernels.
*/
ccl_device void kernel_shader_eval(KernelGlobals *kg)
{
int ray_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
/* Sorting on cuda split is not implemented */
#ifdef __KERNEL_CUDA__
int queue_index = kernel_split_params.queue_index[QUEUE_ACTIVE_AND_REGENERATED_RAYS];
#else
int queue_index = kernel_split_params.queue_index[QUEUE_SHADER_SORTED_RAYS];
#endif
if(ray_index >= queue_index) {
return;
}
ray_index = get_ray_index(kg, ray_index,
#ifdef __KERNEL_CUDA__
QUEUE_ACTIVE_AND_REGENERATED_RAYS,
#else
QUEUE_SHADER_SORTED_RAYS,
#endif
kernel_split_state.queue_data,
kernel_split_params.queue_size,
0);
if(ray_index == QUEUE_EMPTY_SLOT) {
return;
}
ccl_global char *ray_state = kernel_split_state.ray_state;
if(IS_STATE(ray_state, ray_index, RAY_ACTIVE)) {
RNG rng = kernel_split_state.rng[ray_index];
ccl_global PathState *state = &kernel_split_state.path_state[ray_index];
#ifndef __BRANCHED_PATH__
float rbsdf = path_state_rng_1D_for_decision(kg, &rng, state, PRNG_BSDF);
shader_eval_surface(kg, &kernel_split_state.sd[ray_index], &rng, state, rbsdf, state->flag, SHADER_CONTEXT_MAIN);
#else
ShaderContext ctx = SHADER_CONTEXT_MAIN;
float rbsdf = 0.0f;
if(!kernel_data.integrator.branched || IS_FLAG(ray_state, ray_index, RAY_BRANCHED_INDIRECT)) {
rbsdf = path_state_rng_1D_for_decision(kg, &rng, state, PRNG_BSDF);
}
if(IS_FLAG(ray_state, ray_index, RAY_BRANCHED_INDIRECT)) {
ctx = SHADER_CONTEXT_INDIRECT;
}
shader_eval_surface(kg, &kernel_split_state.sd[ray_index], &rng, state, rbsdf, state->flag, ctx);
shader_merge_closures(&kernel_split_state.sd[ray_index]);
#endif /* __BRANCHED_PATH__ */
kernel_split_state.rng[ray_index] = rng;
}
}
CCL_NAMESPACE_END
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