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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.
*/
CCL_NAMESPACE_BEGIN
/* This kernel Initializes structures needed in path-iteration kernels.
*
* Note on Queues:
* All slots in queues are initialized to queue empty slot;
* The number of elements in the queues is initialized to 0;
*/
#ifndef __KERNEL_CPU__
ccl_device void kernel_data_init(
#else
void KERNEL_FUNCTION_FULL_NAME(data_init)(
#endif
KernelGlobals *kg,
ccl_constant KernelData *data,
ccl_global void *split_data_buffer,
int num_elements,
ccl_global char *ray_state,
#ifdef __KERNEL_OPENCL__
KERNEL_BUFFER_PARAMS,
#endif
int start_sample,
int end_sample,
int sx, int sy, int sw, int sh, int offset, int stride,
ccl_global int *Queue_index, /* Tracks the number of elements in queues */
int queuesize, /* size (capacity) of the queue */
ccl_global char *use_queues_flag, /* flag to decide if scene-intersect kernel should use queues to fetch ray index */
ccl_global unsigned int *work_pools, /* Work pool for each work group */
unsigned int num_samples,
ccl_global float *buffer)
{
#ifdef KERNEL_STUB
STUB_ASSERT(KERNEL_ARCH, data_init);
#else
#ifdef __KERNEL_OPENCL__
kg->data = data;
#endif
kernel_split_params.tile.x = sx;
kernel_split_params.tile.y = sy;
kernel_split_params.tile.w = sw;
kernel_split_params.tile.h = sh;
kernel_split_params.tile.start_sample = start_sample;
kernel_split_params.tile.num_samples = num_samples;
kernel_split_params.tile.offset = offset;
kernel_split_params.tile.stride = stride;
kernel_split_params.tile.buffer = buffer;
kernel_split_params.total_work_size = sw * sh * num_samples;
kernel_split_params.work_pools = work_pools;
kernel_split_params.queue_index = Queue_index;
kernel_split_params.queue_size = queuesize;
kernel_split_params.use_queues_flag = use_queues_flag;
split_data_init(kg, &kernel_split_state, num_elements, split_data_buffer, ray_state);
#ifdef __KERNEL_OPENCL__
kernel_set_buffer_pointers(kg, KERNEL_BUFFER_ARGS);
kernel_set_buffer_info(kg);
#endif
int thread_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
/* Initialize queue data and queue index. */
if(thread_index < queuesize) {
for(int i = 0; i < NUM_QUEUES; i++) {
kernel_split_state.queue_data[i * queuesize + thread_index] = QUEUE_EMPTY_SLOT;
}
}
if(thread_index == 0) {
for(int i = 0; i < NUM_QUEUES; i++) {
Queue_index[i] = 0;
}
/* The scene-intersect kernel should not use the queues very first time.
* since the queue would be empty.
*/
*use_queues_flag = 0;
}
#endif /* KERENL_STUB */
}
CCL_NAMESPACE_END
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