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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 sets up the ShaderData structure from the values computed
* by the previous kernels.
*
* It also identifies the rays of state RAY_TO_REGENERATE and enqueues them
* in QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS queue.
*/
ccl_device void kernel_shader_setup(KernelGlobals *kg,
ccl_local_param unsigned int *local_queue_atomics)
{
/* Enqueue RAY_TO_REGENERATE rays into QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS queue. */
if (ccl_local_id(0) == 0 && ccl_local_id(1) == 0) {
*local_queue_atomics = 0;
}
ccl_barrier(CCL_LOCAL_MEM_FENCE);
int ray_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
int queue_index = kernel_split_params.queue_index[QUEUE_ACTIVE_AND_REGENERATED_RAYS];
if (ray_index < queue_index) {
ray_index = get_ray_index(kg,
ray_index,
QUEUE_ACTIVE_AND_REGENERATED_RAYS,
kernel_split_state.queue_data,
kernel_split_params.queue_size,
0);
}
else {
ray_index = QUEUE_EMPTY_SLOT;
}
char enqueue_flag = (IS_STATE(kernel_split_state.ray_state, ray_index, RAY_TO_REGENERATE)) ? 1 :
0;
enqueue_ray_index_local(ray_index,
QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS,
enqueue_flag,
kernel_split_params.queue_size,
local_queue_atomics,
kernel_split_state.queue_data,
kernel_split_params.queue_index);
/* Continue on with shader evaluation. */
if (IS_STATE(kernel_split_state.ray_state, ray_index, RAY_ACTIVE)) {
Intersection isect = kernel_split_state.isect[ray_index];
Ray ray = kernel_split_state.ray[ray_index];
ShaderData *sd = kernel_split_sd(sd, ray_index);
shader_setup_from_ray(kg, sd, &isect, &ray);
#ifdef __VOLUME__
if (sd->flag & SD_HAS_ONLY_VOLUME) {
ASSIGN_RAY_STATE(kernel_split_state.ray_state, ray_index, RAY_HAS_ONLY_VOLUME);
}
#endif
}
}
CCL_NAMESPACE_END
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