1 files changed, 77 insertions, 0 deletions
diff --git a/intern/cycles/kernel/split/kernel_indirect_subsurface.h b/intern/cycles/kernel/split/kernel_indirect_subsurface.h
new file mode 100644
index 00000000000..a56e85abeb9
--- /dev/null
+++ b/intern/cycles/kernel/split/kernel_indirect_subsurface.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2011-2017 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.
+ */
+
+CCL_NAMESPACE_BEGIN
+
+ccl_device void kernel_indirect_subsurface(KernelGlobals *kg)
+{
+	int thread_index = ccl_global_id(1) * ccl_global_size(0) + ccl_global_id(0);
+	if(thread_index == 0) {
+		/* We will empty both queues in this kernel. */
+		kernel_split_params.queue_index[QUEUE_ACTIVE_AND_REGENERATED_RAYS] = 0;
+		kernel_split_params.queue_index[QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS] = 0;
+	}
+
+	int ray_index;
+	get_ray_index(kg, thread_index,
+	              QUEUE_ACTIVE_AND_REGENERATED_RAYS,
+	              kernel_split_state.queue_data,
+	              kernel_split_params.queue_size,
+	              1);
+	ray_index = get_ray_index(kg, thread_index,
+	                          QUEUE_HITBG_BUFF_UPDATE_TOREGEN_RAYS,
+	                          kernel_split_state.queue_data,
+	                          kernel_split_params.queue_size,
+	                          1);
+
+#ifdef __SUBSURFACE__
+
+	if(ray_index == QUEUE_EMPTY_SLOT) {
+		return;
+	}
+
+	ccl_global char *ray_state = kernel_split_state.ray_state;
+	ccl_global PathState *state = &kernel_split_state.path_state[ray_index];
+	PathRadiance *L = &kernel_split_state.path_radiance[ray_index];
+	ccl_global Ray *ray = &kernel_split_state.ray[ray_index];
+	ccl_global float3 *throughput = &kernel_split_state.throughput[ray_index];
+
+	if(IS_STATE(ray_state, ray_index, RAY_UPDATE_BUFFER)) {
+		ccl_addr_space SubsurfaceIndirectRays *ss_indirect = &kernel_split_state.ss_rays[ray_index];
+		kernel_path_subsurface_accum_indirect(ss_indirect, L);
+
+		/* Trace indirect subsurface rays by restarting the loop. this uses less
+		 * stack memory than invoking kernel_path_indirect.
+		 */
+		if(ss_indirect->num_rays) {
+			kernel_path_subsurface_setup_indirect(kg,
+			                                      ss_indirect,
+			                                      state,
+			                                      ray,
+			                                      L,
+			                                      throughput);
+			ASSIGN_RAY_STATE(ray_state, ray_index, RAY_REGENERATED);
+		}
+		else {
+			ASSIGN_RAY_STATE(ray_state, ray_index, RAY_UPDATE_BUFFER);
+		}
+	}
+
+#endif  /* __SUBSURFACE__ */
+
+}
+
+CCL_NAMESPACE_END