forked from bartvdbraak/blender
91 lines
3.4 KiB
C
91 lines
3.4 KiB
C
/*
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* Copyright 2011-2016 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 enqueues rays of different ray state into their
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* appropriate queues:
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*
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* 1. Rays that have been determined to hit the background from the
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* "kernel_scene_intersect" kernel are enqueued in
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* QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS;
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* 2. Rays that have been determined to be actively participating in pat
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* -iteration will be enqueued into QUEUE_ACTIVE_AND_REGENERATED_RAYS.
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*
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* State of queue during other times this kernel is called:
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* At entry,
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* - QUEUE_ACTIVE_AND_REGENERATED_RAYS will be empty.
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* - QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS will contain RAY_TO_REGENERATE
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* and RAY_UPDATE_BUFFER rays.
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* At exit,
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* - QUEUE_ACTIVE_AND_REGENERATED_RAYS will be filled with RAY_ACTIVE rays.
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* - QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS will be filled with
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* RAY_TO_REGENERATE, RAY_UPDATE_BUFFER, RAY_HIT_BACKGROUND rays.
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*/
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ccl_device void kernel_queue_enqueue(KernelGlobals *kg,
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ccl_local_param QueueEnqueueLocals *locals)
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{
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/* We have only 2 cases (Hit/Not-Hit) */
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int lidx = ccl_local_id(1) * ccl_local_size(0) + ccl_local_id(0);
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int ray_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
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if(lidx == 0) {
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locals->queue_atomics[0] = 0;
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locals->queue_atomics[1] = 0;
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}
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ccl_barrier(CCL_LOCAL_MEM_FENCE);
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int queue_number = -1;
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if(IS_STATE(kernel_split_state.ray_state, ray_index, RAY_HIT_BACKGROUND) ||
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IS_STATE(kernel_split_state.ray_state, ray_index, RAY_UPDATE_BUFFER)) {
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queue_number = QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS;
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}
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else if(IS_STATE(kernel_split_state.ray_state, ray_index, RAY_ACTIVE) ||
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IS_STATE(kernel_split_state.ray_state, ray_index, RAY_REGENERATED)) {
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queue_number = QUEUE_ACTIVE_AND_REGENERATED_RAYS;
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}
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unsigned int my_lqidx;
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if(queue_number != -1) {
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my_lqidx = get_local_queue_index(queue_number, locals->queue_atomics);
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}
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ccl_barrier(CCL_LOCAL_MEM_FENCE);
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if(lidx == 0) {
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locals->queue_atomics[QUEUE_ACTIVE_AND_REGENERATED_RAYS] =
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get_global_per_queue_offset(QUEUE_ACTIVE_AND_REGENERATED_RAYS,
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locals->queue_atomics,
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kernel_split_params.queue_index);
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locals->queue_atomics[QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS] =
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get_global_per_queue_offset(QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS,
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locals->queue_atomics,
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kernel_split_params.queue_index);
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}
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ccl_barrier(CCL_LOCAL_MEM_FENCE);
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unsigned int my_gqidx;
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if(queue_number != -1) {
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my_gqidx = get_global_queue_index(queue_number,
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kernel_split_params.queue_size,
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my_lqidx,
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locals->queue_atomics);
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kernel_split_state.queue_data[my_gqidx] = ray_index;
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}
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}
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CCL_NAMESPACE_END
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