forked from bartvdbraak/blender
Brecht Van Lommel
5bb677e592
This was originally done with the first sample in the kernel for better performance, but it doesn't work anymore with atomics. Any benefit was very minor anyway, too small to measure it seems.
110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/*
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* Copyright 2011-2015 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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CCL_NAMESPACE_BEGIN
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/* This kernel Initializes structures needed in path-iteration kernels.
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*
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* Note on Queues:
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* All slots in queues are initialized to queue empty slot;
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* The number of elements in the queues is initialized to 0;
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*/
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#ifndef __KERNEL_CPU__
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ccl_device void kernel_data_init(
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#else
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void KERNEL_FUNCTION_FULL_NAME(data_init)(
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#endif
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KernelGlobals *kg,
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ccl_constant KernelData *data,
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ccl_global void *split_data_buffer,
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int num_elements,
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ccl_global char *ray_state,
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#ifdef __KERNEL_OPENCL__
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KERNEL_BUFFER_PARAMS,
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#endif
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int start_sample,
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int end_sample,
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int sx, int sy, int sw, int sh, int offset, int stride,
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ccl_global int *Queue_index, /* Tracks the number of elements in queues */
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int queuesize, /* size (capacity) of the queue */
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ccl_global char *use_queues_flag, /* flag to decide if scene-intersect kernel should use queues to fetch ray index */
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ccl_global unsigned int *work_pools, /* Work pool for each work group */
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unsigned int num_samples,
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ccl_global float *buffer)
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{
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#ifdef KERNEL_STUB
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STUB_ASSERT(KERNEL_ARCH, data_init);
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#else
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#ifdef __KERNEL_OPENCL__
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kg->data = data;
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#endif
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kernel_split_params.tile.x = sx;
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kernel_split_params.tile.y = sy;
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kernel_split_params.tile.w = sw;
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kernel_split_params.tile.h = sh;
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kernel_split_params.tile.start_sample = start_sample;
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kernel_split_params.tile.num_samples = num_samples;
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kernel_split_params.tile.offset = offset;
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kernel_split_params.tile.stride = stride;
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kernel_split_params.tile.buffer = buffer;
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kernel_split_params.total_work_size = sw * sh * num_samples;
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kernel_split_params.work_pools = work_pools;
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kernel_split_params.queue_index = Queue_index;
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kernel_split_params.queue_size = queuesize;
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kernel_split_params.use_queues_flag = use_queues_flag;
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split_data_init(kg, &kernel_split_state, num_elements, split_data_buffer, ray_state);
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#ifdef __KERNEL_OPENCL__
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kernel_set_buffer_pointers(kg, KERNEL_BUFFER_ARGS);
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kernel_set_buffer_info(kg);
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#endif
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int thread_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
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/* Initialize queue data and queue index. */
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if(thread_index < queuesize) {
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for(int i = 0; i < NUM_QUEUES; i++) {
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kernel_split_state.queue_data[i * queuesize + thread_index] = QUEUE_EMPTY_SLOT;
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}
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}
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if(thread_index == 0) {
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for(int i = 0; i < NUM_QUEUES; i++) {
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Queue_index[i] = 0;
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}
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/* The scene-intersect kernel should not use the queues very first time.
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* since the queue would be empty.
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*/
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*use_queues_flag = 0;
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}
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#endif /* KERENL_STUB */
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}
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CCL_NAMESPACE_END
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