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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_background_buffer_update.h"
__kernel void kernel_ocl_path_trace_background_buffer_update(
ccl_global char *kg,
ccl_constant KernelData *data,
ccl_global float *per_sample_output_buffers,
ccl_global uint *rng_state,
ccl_global uint *rng_coop, /* Required for buffer Update */
ccl_global float3 *throughput_coop, /* Required for background hit processing */
PathRadiance *PathRadiance_coop, /* Required for background hit processing and buffer Update */
ccl_global Ray *Ray_coop, /* Required for background hit processing */
ccl_global PathState *PathState_coop, /* Required for background hit processing */
ccl_global float *L_transparent_coop, /* Required for background hit processing and buffer Update */
ccl_global char *ray_state, /* Stores information on the current state of a ray */
int sw, int sh, int sx, int sy, int stride,
int rng_state_offset_x,
int rng_state_offset_y,
int rng_state_stride,
ccl_global unsigned int *work_array, /* Denotes work of each ray */
ccl_global int *Queue_data, /* Queues memory */
ccl_global int *Queue_index, /* Tracks the number of elements in each queue */
int queuesize, /* Size (capacity) of each queue */
int end_sample,
int start_sample,
#ifdef __WORK_STEALING__
ccl_global unsigned int *work_pool_wgs,
unsigned int num_samples,
#endif
#ifdef __KERNEL_DEBUG__
DebugData *debugdata_coop,
#endif
int parallel_samples) /* Number of samples to be processed in parallel */
{
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);
int ray_index = get_global_id(1) * get_global_size(0) + get_global_id(0);
if(ray_index == 0) {
/* We will empty this queue in this kernel. */
Queue_index[QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS] = 0;
}
char enqueue_flag = 0;
ray_index = get_ray_index(ray_index,
QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS,
Queue_data,
queuesize,
1);
#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_background_buffer_update((KernelGlobals *)kg,
per_sample_output_buffers,
rng_state,
rng_coop,
throughput_coop,
PathRadiance_coop,
Ray_coop,
PathState_coop,
L_transparent_coop,
ray_state,
sw, sh, sx, sy, stride,
rng_state_offset_x,
rng_state_offset_y,
rng_state_stride,
work_array,
end_sample,
start_sample,
#ifdef __WORK_STEALING__
work_pool_wgs,
num_samples,
#endif
#ifdef __KERNEL_DEBUG__
debugdata_coop,
#endif
parallel_samples,
ray_index);
#ifndef __COMPUTE_DEVICE_GPU__
}
#endif
/* Enqueue RAY_REGENERATED rays into QUEUE_ACTIVE_AND_REGENERATED_RAYS;
* These rays will be made active during next SceneIntersectkernel.
*/
enqueue_ray_index_local(ray_index,
QUEUE_ACTIVE_AND_REGENERATED_RAYS,
enqueue_flag,
queuesize,
&local_queue_atomics,
Queue_data,
Queue_index);
}
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