forked from bartvdbraak/blender
84ad20acef
This commit re-shuffles code in split kernel once again and makes it so common parts which is in the headers is only responsible to making all the work needed for specified ray index. Getting ray index, checking for it's validity and enqueuing tasks are now happening in the device specified part of the kernel. This actually makes sense because enqueuing is indeed device-specified and i.e. with CUDA we'll want to enqueue kernels from kernel and avoid CPU roundtrip. TODO: - Kernel comments are still placed in the common header files, but since queue related stuff is not passed to those functions those comments might need to be split as well. Just currently read them considering that they're also covering the way how all devices are invoking the common code path. - Arguments might need to be wrapped into KernelGlobals, so we don't ened to pass all them around as function arguments.
91 lines
3.5 KiB
Common Lisp
91 lines
3.5 KiB
Common Lisp
/*
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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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#include "split/kernel_direct_lighting.h"
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__kernel void kernel_ocl_path_trace_direct_lighting(
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ccl_global char *globals,
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ccl_constant KernelData *data,
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ccl_global char *shader_data, /* Required for direct lighting */
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ccl_global char *shader_DL, /* Required for direct lighting */
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ccl_global uint *rng_coop, /* Required for direct lighting */
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ccl_global PathState *PathState_coop, /* Required for direct lighting */
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ccl_global int *ISLamp_coop, /* Required for direct lighting */
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ccl_global Ray *LightRay_coop, /* Required for direct lighting */
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ccl_global BsdfEval *BSDFEval_coop, /* Required for direct lighting */
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ccl_global char *ray_state, /* Denotes the state of each ray */
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ccl_global int *Queue_data, /* Queue memory */
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ccl_global int *Queue_index, /* Tracks the number of elements in each queue */
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int queuesize) /* Size (capacity) of each queue */
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{
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ccl_local unsigned int local_queue_atomics;
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if(get_local_id(0) == 0 && get_local_id(1) == 0) {
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local_queue_atomics = 0;
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}
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barrier(CLK_LOCAL_MEM_FENCE);
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char enqueue_flag = 0;
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int ray_index = get_global_id(1) * get_global_size(0) + get_global_id(0);
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ray_index = get_ray_index(ray_index,
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QUEUE_ACTIVE_AND_REGENERATED_RAYS,
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Queue_data,
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queuesize,
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0);
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#ifdef __COMPUTE_DEVICE_GPU__
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/* If we are executing on a GPU device, we exit all threads that are not
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* required.
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*
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* If we are executing on a CPU device, then we need to keep all threads
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* active since we have barrier() calls later in the kernel. CPU devices,
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* expect all threads to execute barrier statement.
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*/
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if(ray_index == QUEUE_EMPTY_SLOT) {
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return;
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}
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#endif
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#ifndef __COMPUTE_DEVICE_GPU__
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if(ray_index != QUEUE_EMPTY_SLOT) {
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#endif
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enqueue_flag = kernel_direct_lighting(globals,
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data,
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shader_data,
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shader_DL,
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rng_coop,
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PathState_coop,
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ISLamp_coop,
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LightRay_coop,
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BSDFEval_coop,
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ray_state,
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ray_index);
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#ifndef __COMPUTE_DEVICE_GPU__
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}
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#endif
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#ifdef __EMISSION__
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/* Enqueue RAY_SHADOW_RAY_CAST_DL rays. */
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enqueue_ray_index_local(ray_index,
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QUEUE_SHADOW_RAY_CAST_DL_RAYS,
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enqueue_flag,
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queuesize,
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&local_queue_atomics,
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Queue_data,
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Queue_index);
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#endif
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}
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