forked from bartvdbraak/blender
57e26627c4
Decoupled ray marching is not supported yet. Transparent shadows are always enabled for volume rendering. Changes in kernel/bvh and kernel/geom are from Sergey. This simiplifies code significantly, and prepares it for record-all transparent shadow function in split kernel.
88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/*
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* Copyright 2011-2017 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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ccl_device void kernel_indirect_background(KernelGlobals *kg)
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{
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/*
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ccl_local unsigned int local_queue_atomics;
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if(ccl_local_id(0) == 0 && ccl_local_id(1) == 0) {
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local_queue_atomics = 0;
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}
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ccl_barrier(CCL_LOCAL_MEM_FENCE);
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// */
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int ray_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
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ray_index = get_ray_index(kg, ray_index,
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QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS,
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kernel_split_state.queue_data,
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kernel_split_params.queue_size,
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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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ccl_global char *ray_state = kernel_split_state.ray_state;
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ccl_global PathState *state = &kernel_split_state.path_state[ray_index];
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PathRadiance *L = &kernel_split_state.path_radiance[ray_index];
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ccl_global Ray *ray = &kernel_split_state.ray[ray_index];
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ccl_global float3 *throughput = &kernel_split_state.throughput[ray_index];
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ccl_global float *L_transparent = &kernel_split_state.L_transparent[ray_index];
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if(IS_STATE(ray_state, ray_index, RAY_HIT_BACKGROUND)) {
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/* eval background shader if nothing hit */
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if(kernel_data.background.transparent && (state->flag & PATH_RAY_CAMERA)) {
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*L_transparent = (*L_transparent) + average((*throughput));
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#ifdef __PASSES__
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if(!(kernel_data.film.pass_flag & PASS_BACKGROUND))
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#endif
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ASSIGN_RAY_STATE(ray_state, ray_index, RAY_UPDATE_BUFFER);
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}
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if(IS_STATE(ray_state, ray_index, RAY_HIT_BACKGROUND)) {
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#ifdef __BACKGROUND__
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/* sample background shader */
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float3 L_background = indirect_background(kg, &kernel_split_state.sd_DL_shadow[ray_index], state, ray);
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path_radiance_accum_background(L, (*throughput), L_background, state->bounce);
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#endif
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ASSIGN_RAY_STATE(ray_state, ray_index, RAY_UPDATE_BUFFER);
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}
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}
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#ifndef __COMPUTE_DEVICE_GPU__
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}
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#endif
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}
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CCL_NAMESPACE_END
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