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/*
* Copyright 2011-2015 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 "split/kernel_direct_lighting.h"
__kernel void kernel_ocl_path_trace_direct_lighting(
ccl_global char *globals,
ccl_constant KernelData *data,
ccl_global char *shader_data, /* Required for direct lighting */
ccl_global char *shader_DL, /* Required for direct lighting */
ccl_global uint *rng_coop, /* Required for direct lighting */
ccl_global PathState *PathState_coop, /* Required for direct lighting */
ccl_global int *ISLamp_coop, /* Required for direct lighting */
ccl_global Ray *LightRay_coop, /* Required for direct lighting */
ccl_global BsdfEval *BSDFEval_coop, /* Required for direct lighting */
ccl_global char *ray_state, /* Denotes the state of each ray */
ccl_global int *Queue_data, /* Queue memory */
ccl_global int *Queue_index, /* Tracks the number of elements in each queue */
int queuesize) /* Size (capacity) of each queue */
{
ccl_local unsigned int local_queue_atomics;
if(get_local_id(0) == 0 && get_local_id(1) == 0) {
local_queue_atomics = 0;
}
barrier(CLK_LOCAL_MEM_FENCE);
char enqueue_flag = 0;
int ray_index = get_global_id(1) * get_global_size(0) + get_global_id(0);
ray_index = get_ray_index(ray_index,
QUEUE_ACTIVE_AND_REGENERATED_RAYS,
Queue_data,
queuesize,
0);
#ifdef __COMPUTE_DEVICE_GPU__
/* If we are executing on a GPU device, we exit all threads that are not
* required.
*
* If we are executing on a CPU device, then we need to keep all threads
* active since we have barrier() calls later in the kernel. CPU devices,
* expect all threads to execute barrier statement.
*/
if(ray_index == QUEUE_EMPTY_SLOT) {
return;
}
#endif
#ifndef __COMPUTE_DEVICE_GPU__
if(ray_index != QUEUE_EMPTY_SLOT) {
#endif
enqueue_flag = kernel_direct_lighting(globals,
data,
shader_data,
shader_DL,
rng_coop,
PathState_coop,
ISLamp_coop,
LightRay_coop,
BSDFEval_coop,
ray_state,
ray_index);
#ifndef __COMPUTE_DEVICE_GPU__
}
#endif
#ifdef __EMISSION__
/* Enqueue RAY_SHADOW_RAY_CAST_DL rays. */
enqueue_ray_index_local(ray_index,
QUEUE_SHADOW_RAY_CAST_DL_RAYS,
enqueue_flag,
queuesize,
&local_queue_atomics,
Queue_data,
Queue_index);
#endif
}
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