diff options
Diffstat (limited to 'intern/cycles/kernel/kernels/opencl/kernel_queue_enqueue.cl')
| -rw-r--r-- | intern/cycles/kernel/kernels/opencl/kernel_queue_enqueue.cl | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/intern/cycles/kernel/kernels/opencl/kernel_queue_enqueue.cl b/intern/cycles/kernel/kernels/opencl/kernel_queue_enqueue.cl new file mode 100644 index 00000000000..3156dc255fb --- /dev/null +++ b/intern/cycles/kernel/kernels/opencl/kernel_queue_enqueue.cl @@ -0,0 +1,106 @@ +/* + * 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 "../../kernel_compat_opencl.h" +#include "../../kernel_math.h" +#include "../../kernel_types.h" +#include "../../kernel_globals.h" +#include "../../kernel_queues.h" + +/* + * The kernel "kernel_queue_enqueue" enqueues rays of + * different ray state into their appropriate Queues; + * 1. Rays that have been determined to hit the background from the + * "kernel_scene_intersect" kernel + * are enqueued in QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS; + * 2. Rays that have been determined to be actively participating in path-iteration will be enqueued into QUEUE_ACTIVE_AND_REGENERATED_RAYS. + * + * The input and output of the kernel is as follows, + * + * ray_state -------------------------------------------|--- kernel_queue_enqueue --|--- Queue_data (QUEUE_ACTIVE_AND_REGENERATED_RAYS & QUEUE_HITBF_BUFF_UPDATE_TOREGEN_RAYS) + * Queue_index(QUEUE_ACTIVE_AND_REGENERATED_RAYS) ------| |--- Queue_index (QUEUE_ACTIVE_AND_REGENERATED_RAYS & QUEUE_HITBF_BUFF_UPDATE_TOREGEN_RAYS) + * Queue_index(QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS) ---| | + * queuesize -------------------------------------------| | + * + * Note on Queues : + * State of queues during the first time this kernel is called : + * At entry, + * Both QUEUE_ACTIVE_AND_REGENERATED_RAYS and QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS will be empty. + * At exit, + * QUEUE_ACTIVE_AND_REGENERATED_RAYS will be filled with RAY_ACTIVE rays + * QUEUE_HITBF_BUFF_UPDATE_TOREGEN_RAYS will be filled with RAY_HIT_BACKGROUND rays. + * + * State of queue during other times this kernel is called : + * At entry, + * QUEUE_ACTIVE_AND_REGENERATED_RAYS will be empty. + * QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS will contain RAY_TO_REGENERATE and RAY_UPDATE_BUFFER rays. + * At exit, + * QUEUE_ACTIVE_AND_REGENERATED_RAYS will be filled with RAY_ACTIVE rays. + * QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS will be filled with RAY_TO_REGENERATE, RAY_UPDATE_BUFFER, RAY_HIT_BACKGROUND rays. + */ +__kernel void kernel_ocl_path_trace_queue_enqueue( + ccl_global int *Queue_data, /* Queue memory */ + ccl_global int *Queue_index, /* Tracks the number of elements in each queue */ + ccl_global char *ray_state, /* Denotes the state of each ray */ + int queuesize) /* Size (capacity) of each queue */ +{ + /* We have only 2 cases (Hit/Not-Hit) */ + ccl_local unsigned int local_queue_atomics[2]; + + int lidx = get_local_id(1) * get_local_size(0) + get_local_id(0); + int ray_index = get_global_id(1) * get_global_size(0) + get_global_id(0); + + if(lidx < 2 ) { + local_queue_atomics[lidx] = 0; + } + barrier(CLK_LOCAL_MEM_FENCE); + + int queue_number = -1; + + if(IS_STATE(ray_state, ray_index, RAY_HIT_BACKGROUND)) { + queue_number = QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS; + } + else if(IS_STATE(ray_state, ray_index, RAY_ACTIVE)) { + queue_number = QUEUE_ACTIVE_AND_REGENERATED_RAYS; + } + + unsigned int my_lqidx; + if(queue_number != -1) { + my_lqidx = get_local_queue_index(queue_number, local_queue_atomics); + } + barrier(CLK_LOCAL_MEM_FENCE); + + if(lidx == 0) { + local_queue_atomics[QUEUE_ACTIVE_AND_REGENERATED_RAYS] = + get_global_per_queue_offset(QUEUE_ACTIVE_AND_REGENERATED_RAYS, + local_queue_atomics, + Queue_index); + local_queue_atomics[QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS] = + get_global_per_queue_offset(QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS, + local_queue_atomics, + Queue_index); + } + barrier(CLK_LOCAL_MEM_FENCE); + + unsigned int my_gqidx; + if(queue_number != -1) { + my_gqidx = get_global_queue_index(queue_number, + queuesize, + my_lqidx, + local_queue_atomics); + Queue_data[my_gqidx] = ray_index; + } +} |