Depsgraph: Bring back visibility checks based on collection restrict flags

The title says it all actually, the idea is to speedup the following case:

- Visible duplicator of a restricted collection (reported as T56512),

One of the questionable change is that none of the view layer bases is
ignored now. This ensures corresponding objects will have copy-on-write
component evaluated, making it possible to access those pointers. The
evaluation of those objects is skipped.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D3641

11 files changed, 196 insertions, 116 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder.cc b/source/blender/depsgraph/intern/builder/deg_builder.cc
index 8f5925a5ce3..0549ec76f3c 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder.cc
@@ -34,6 +34,8 @@
 #include "DNA_object_types.h"
 #include "DNA_ID.h"
 
+#include "BLI_stack.h"
+
 extern "C" {
 #include "BKE_animsys.h"
 }
@@ -43,6 +45,8 @@ extern "C" {
 #include "intern/eval/deg_eval_copy_on_write.h"
 #include "intern/nodes/deg_node.h"
 #include "intern/nodes/deg_node_id.h"
+#include "intern/nodes/deg_node_component.h"
+#include "intern/nodes/deg_node_operation.h"
 
 #include "util/deg_util_foreach.h"
 
@@ -50,8 +54,61 @@ extern "C" {
 
 namespace DEG {
 
+namespace {
+
+void deg_graph_build_flush_layers(Depsgraph *graph)
+{
+	BLI_Stack *stack = BLI_stack_new(sizeof(OperationDepsNode*),
+	                                 "DEG flush layers stack");
+	foreach (OperationDepsNode *op_node, graph->operations) {
+		op_node->done = 0;
+		op_node->num_links_pending = 0;
+		foreach (DepsRelation *rel, op_node->outlinks) {
+			if ((rel->from->type == DEG_NODE_TYPE_OPERATION) &&
+			    (rel->flag & DEPSREL_FLAG_CYCLIC) == 0)
+			{
+				++op_node->num_links_pending;
+			}
+		}
+		if (op_node->num_links_pending == 0) {
+			BLI_stack_push(stack, &op_node);
+			op_node->done = 1;
+		}
+	}
+	while (!BLI_stack_is_empty(stack)) {
+		OperationDepsNode *op_node;
+		BLI_stack_pop(stack, &op_node);
+		/* Flush layers to parents. */
+		foreach (DepsRelation *rel, op_node->inlinks) {
+			if (rel->from->type == DEG_NODE_TYPE_OPERATION) {
+				OperationDepsNode *op_from = (OperationDepsNode *)rel->from;
+				op_from->owner->owner->is_visible |=
+				        op_node->owner->owner->is_visible;
+			}
+		}
+		/* Schedule parent nodes. */
+		foreach (DepsRelation *rel, op_node->inlinks) {
+			if (rel->from->type == DEG_NODE_TYPE_OPERATION) {
+				OperationDepsNode *op_from = (OperationDepsNode *)rel->from;
+				if ((rel->flag & DEPSREL_FLAG_CYCLIC) == 0) {
+					BLI_assert(op_from->num_links_pending > 0);
+					--op_from->num_links_pending;
+				}
+				if (op_from->num_links_pending == 0 && op_from->done == 0) {
+					BLI_stack_push(stack, &op_from);
+					op_from->done = 1;
+				}
+			}
+		}
+	}
+	BLI_stack_free(stack);
+}
+
+}  // namespace
+
 void deg_graph_build_finalize(Main *bmain, Depsgraph *graph)
 {
+	deg_graph_build_flush_layers(graph);
 	/* Re-tag IDs for update if it was tagged before the relations
 	 * update tag.
 	 */
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc b/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc
index 8d2960d1587..45c8bb5c93d 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc
@@ -141,6 +141,8 @@ DepsgraphNodeBuilder::DepsgraphNodeBuilder(Main *bmain, Depsgraph *graph)
       graph_(graph),
       scene_(NULL),
       view_layer_(NULL),
+      view_layer_index_(-1),
+      collection_(NULL),
       cow_id_hash_(NULL)
 {
 }
@@ -394,7 +396,7 @@ void DepsgraphNodeBuilder::build_id(ID *id) {
 			build_camera((Camera *)id);
 			break;
 		case ID_GR:
-			build_collection(DEG_COLLECTION_OWNER_UNKNOWN, (Collection *)id);
+			build_collection((Collection *)id);
 			break;
 		case ID_OB:
 			build_object(-1, (Object *)id, DEG_ID_LINKED_INDIRECTLY);
@@ -445,46 +447,49 @@ void DepsgraphNodeBuilder::build_id(ID *id) {
 	}
 }
 
-void DepsgraphNodeBuilder::build_collection(
-        eDepsNode_CollectionOwner owner_type,
-        Collection *collection)
+void DepsgraphNodeBuilder::build_collection(Collection *collection)
 {
 	if (built_map_.checkIsBuiltAndTag(collection)) {
+		/* NOTE: Currently collections restrict flags only depend on collection
+		 * itself and do not depend on a "context" (like, particle system
+		 * visibility).
+		 *
+		 * If we ever change this, we need to update restrict flag here for an
+		 * already built collection.
+		 */
 		return;
 	}
-	const bool allow_restrict_flags = (owner_type == DEG_COLLECTION_OWNER_SCENE);
-	if (allow_restrict_flags) {
-		const int restrict_flag = (graph_->mode == DAG_EVAL_VIEWPORT)
-		        ? COLLECTION_RESTRICT_VIEW
-		        : COLLECTION_RESTRICT_RENDER;
-		if (collection->flag & restrict_flag) {
-			return;
-		}
-	}
+	Collection *current_state_collection = collection_;
+	collection_ = collection;
+	const int restrict_flag = (graph_->mode == DAG_EVAL_VIEWPORT)
+	        ? COLLECTION_RESTRICT_VIEW
+	        : COLLECTION_RESTRICT_RENDER;
+	const bool is_parent_collection_restricted =
+	        (current_state_collection == NULL)
+	                ? false
+	                : (current_state_collection->flag & restrict_flag);
+	const bool is_collection_restricted = (collection->flag & restrict_flag);
+	const bool is_collection_visible =
+	        !is_collection_restricted && !is_parent_collection_restricted;
 	/* Collection itself. */
-	add_id_node(&collection->id);
+	IDDepsNode *id_node = add_id_node(&collection->id);
+	id_node->is_visible = is_collection_visible;
 	/* Build collection objects. */
 	LISTBASE_FOREACH (CollectionObject *, cob, &collection->gobject) {
-		if (allow_restrict_flags) {
-			const int restrict_flag = (
-			        (graph_->mode == DAG_EVAL_VIEWPORT) ?
-			        OB_RESTRICT_VIEW :
-			        OB_RESTRICT_RENDER);
-			if (cob->ob->restrictflag & restrict_flag) {
-				continue;
-			}
-		}
-		build_object(-1, cob->ob, DEG_ID_LINKED_INDIRECTLY);
+		build_object(
+		        -1, cob->ob, DEG_ID_LINKED_INDIRECTLY, is_collection_visible);
 	}
 	/* Build child collections. */
 	LISTBASE_FOREACH (CollectionChild *, child, &collection->children) {
-		build_collection(owner_type, child->collection);
+		build_collection(child->collection);
 	}
+	collection_ = current_state_collection;
 }
 
 void DepsgraphNodeBuilder::build_object(int base_index,
                                         Object *object,
-                                        eDepsNode_LinkedState_Type linked_state)
+                                        eDepsNode_LinkedState_Type linked_state,
+                                        bool is_visible)
 {
 	const bool has_object = built_map_.checkIsBuiltAndTag(object);
 	/* Skip rest of components if the ID node was already there. */
@@ -497,11 +502,13 @@ void DepsgraphNodeBuilder::build_object(int base_index,
 			build_object_flags(base_index, object, linked_state);
 		}
 		id_node->linked_state = max(id_node->linked_state, linked_state);
+		id_node->is_visible |= is_visible;
 		return;
 	}
 	/* Create ID node for object and begin init. */
 	IDDepsNode *id_node = add_id_node(&object->id);
 	id_node->linked_state = linked_state;
+	id_node->is_visible = is_visible;
 	object->customdata_mask = 0;
 	/* Various flags, flushing from bases/collections. */
 	build_object_flags(base_index, object, linked_state);
@@ -562,7 +569,7 @@ void DepsgraphNodeBuilder::build_object(int base_index,
 	}
 	/* Object dupligroup. */
 	if (object->dup_group != NULL) {
-		build_collection(DEG_COLLECTION_OWNER_OBJECT, object->dup_group);
+		build_collection(object->dup_group);
 	}
 }
 
@@ -953,7 +960,7 @@ void DepsgraphNodeBuilder::build_rigidbody(Scene *scene)
 
 	/* objects - simulation participants */
 	if (rbw->group) {
-		build_collection(DEG_COLLECTION_OWNER_OBJECT, rbw->group);
+		build_collection(rbw->group);
 
 		FOREACH_COLLECTION_OBJECT_RECURSIVE_BEGIN(rbw->group, object)
 		{
@@ -1029,7 +1036,7 @@ void DepsgraphNodeBuilder::build_particles(Object *object)
 				break;
 			case PART_DRAW_GR:
 				if (part->dup_group != NULL) {
-					build_collection(DEG_COLLECTION_OWNER_OBJECT, part->dup_group);
+					build_collection(part->dup_group);
 				}
 				break;
 		}
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_nodes.h b/source/blender/depsgraph/intern/builder/deg_builder_nodes.h
index 66293a91e85..aacb0670a41 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_nodes.h
+++ b/source/blender/depsgraph/intern/builder/deg_builder_nodes.h
@@ -163,11 +163,11 @@ struct DepsgraphNodeBuilder {
 	void build_view_layer(Scene *scene,
 	                      ViewLayer *view_layer,
 	                      eDepsNode_LinkedState_Type linked_state);
-	void build_collection(eDepsNode_CollectionOwner owner_type,
-	                      Collection *collection);
+	void build_collection(Collection *collection);
 	void build_object(int base_index,
 	                  Object *object,
-	                  eDepsNode_LinkedState_Type linked_state);
+	                  eDepsNode_LinkedState_Type linked_state,
+	                  bool is_visible = true);
 	void build_object_flags(int base_index,
 	                        Object *object,
 	                        eDepsNode_LinkedState_Type linked_state);
@@ -245,6 +245,10 @@ protected:
 	Scene *scene_;
 	ViewLayer *view_layer_;
 	int view_layer_index_;
+	/* NOTE: Collection are possibly built recursively, so be careful when
+	 * setting the current state.
+	 */
+	Collection *collection_;
 
 	GHash *cow_id_hash_;
 	BuilderMap built_map_;
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_nodes_view_layer.cc b/source/blender/depsgraph/intern/builder/deg_builder_nodes_view_layer.cc
index 3d7b2d6d232..409df45de27 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_nodes_view_layer.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_nodes_view_layer.cc
@@ -75,7 +75,7 @@ void DepsgraphNodeBuilder::build_layer_collections(ListBase *lb)
 			continue;
 		}
 		if ((lc->flag & LAYER_COLLECTION_EXCLUDE) == 0) {
-			build_collection(DEG_COLLECTION_OWNER_SCENE, lc->collection);
+			build_collection(lc->collection);
 		}
 		build_layer_collections(&lc->layer_collections);
 	}
@@ -108,10 +108,9 @@ void DepsgraphNodeBuilder::build_view_layer(
 		BASE_ENABLED_VIEWPORT : BASE_ENABLED_RENDER;
 	LISTBASE_FOREACH(Base *, base, &view_layer->object_bases) {
 		/* object itself */
-		if (base->flag & base_flag) {
-			build_object(base_index, base->object, linked_state);
-			base->object->select_color = select_color++;
-		}
+		const bool is_object_visible = (base->flag & base_flag);
+		build_object(base_index, base->object, linked_state, is_object_visible);
+		base->object->select_color = select_color++;
 		++base_index;
 	}
 	build_layer_collections(&view_layer->layer_collections);
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
index 2efe14557a6..f4259803c91 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
@@ -409,7 +409,7 @@ void DepsgraphRelationBuilder::build_id(ID *id)
 			build_camera((Camera *)id);
 			break;
 		case ID_GR:
-			build_collection(DEG_COLLECTION_OWNER_UNKNOWN, NULL, (Collection *)id);
+			build_collection(NULL, (Collection *)id);
 			break;
 		case ID_OB:
 			build_object(NULL, (Object *)id);
@@ -458,37 +458,19 @@ void DepsgraphRelationBuilder::build_id(ID *id)
 }
 
 void DepsgraphRelationBuilder::build_collection(
-        eDepsNode_CollectionOwner owner_type,
         Object *object,
         Collection *collection)
 {
-	const bool allow_restrict_flags = (owner_type == DEG_COLLECTION_OWNER_SCENE);
-	if (allow_restrict_flags) {
-		const int restrict_flag = (graph_->mode == DAG_EVAL_VIEWPORT)
-		        ? COLLECTION_RESTRICT_VIEW
-		        : COLLECTION_RESTRICT_RENDER;
-		if (collection->flag & restrict_flag) {
-			return;
-		}
-	}
 	const bool group_done = built_map_.checkIsBuiltAndTag(collection);
 	OperationKey object_transform_final_key(object != NULL ? &object->id : NULL,
 	                                        DEG_NODE_TYPE_TRANSFORM,
 	                                        DEG_OPCODE_TRANSFORM_FINAL);
 	if (!group_done) {
 		LISTBASE_FOREACH (CollectionObject *, cob, &collection->gobject) {
-			if (allow_restrict_flags) {
-				const int restrict_flag = (graph_->mode == DAG_EVAL_VIEWPORT)
-				        ? OB_RESTRICT_VIEW
-				        : OB_RESTRICT_RENDER;
-				if (cob->ob->restrictflag & restrict_flag) {
-					continue;
-				}
-			}
 			build_object(NULL, cob->ob);
 		}
 		LISTBASE_FOREACH (CollectionChild *, child, &collection->children) {
-			build_collection(owner_type, NULL, child->collection);
+			build_collection(NULL, child->collection);
 		}
 	}
 	if (object != NULL) {
@@ -617,7 +599,7 @@ void DepsgraphRelationBuilder::build_object(Base *base, Object *object)
 	}
 	/* Object dupligroup. */
 	if (object->dup_group != NULL) {
-		build_collection(DEG_COLLECTION_OWNER_OBJECT, object, object->dup_group);
+		build_collection(object, object->dup_group);
 	}
 }
 
@@ -1495,7 +1477,7 @@ void DepsgraphRelationBuilder::build_rigidbody(Scene *scene)
 
 	/* objects - simulation participants */
 	if (rbw->group) {
-		build_collection(DEG_COLLECTION_OWNER_OBJECT, NULL, rbw->group);
+		build_collection(NULL, rbw->group);
 
 		FOREACH_COLLECTION_OBJECT_RECURSIVE_BEGIN(rbw->group, object)
 		{
@@ -1677,7 +1659,7 @@ void DepsgraphRelationBuilder::build_particles(Object *object)
 				break;
 			case PART_DRAW_GR:
 				if (part->dup_group != NULL) {
-					build_collection(DEG_COLLECTION_OWNER_OBJECT, NULL, part->dup_group);
+					build_collection(NULL, part->dup_group);
 					LISTBASE_FOREACH (CollectionObject *, go, &part->dup_group->gobject) {
 						build_particles_visualization_object(object,
 						                                     psys,
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.h b/source/blender/depsgraph/intern/builder/deg_builder_relations.h
index d4f1271b217..20b425c81e3 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.h
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.h
@@ -203,9 +203,7 @@ struct DepsgraphRelationBuilder
 	void build_id(ID *id);
 	void build_layer_collections(ListBase *lb);
 	void build_view_layer(Scene *scene, ViewLayer *view_layer);
-	void build_collection(eDepsNode_CollectionOwner owner_type,
-	                      Object *object,
-	                      Collection *collection);
+	void build_collection(Object *object, Collection *collection);
 	void build_object(Base *base, Object *object);
 	void build_object_flags(Base *base, Object *object);
 	void build_object_data(Object *object);
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc
index 78d1a930eb7..360e823d1bd 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc
@@ -79,7 +79,7 @@ void DepsgraphRelationBuilder::build_layer_collections(ListBase *lb)
 			continue;
 		}
 		if ((lc->flag & LAYER_COLLECTION_EXCLUDE) == 0) {
-			build_collection(DEG_COLLECTION_OWNER_SCENE, NULL, lc->collection);
+			build_collection(NULL, lc->collection);
 		}
 		build_layer_collections(&lc->layer_collections);
 	}
@@ -94,12 +94,8 @@ void DepsgraphRelationBuilder::build_view_layer(Scene *scene, ViewLayer *view_la
 	 * passed to the evaluation functions. During relations builder we only
 	 * do NULL-pointer check of the base, so it's fine to pass original one.
 	 */
-	const int base_flag = (graph_->mode == DAG_EVAL_VIEWPORT) ?
-		BASE_ENABLED_VIEWPORT : BASE_ENABLED_RENDER;
 	LISTBASE_FOREACH (Base *, base, &view_layer->object_bases) {
-		if (base->flag & base_flag) {
-			build_object(base, base->object);
-		}
+		build_object(base, base->object);
 	}
 
 	build_layer_collections(&view_layer->layer_collections);
diff --git a/source/blender/depsgraph/intern/depsgraph_types.h b/source/blender/depsgraph/intern/depsgraph_types.h
index b19eb619fac..534376653e9 100644
--- a/source/blender/depsgraph/intern/depsgraph_types.h
+++ b/source/blender/depsgraph/intern/depsgraph_types.h
@@ -280,15 +280,4 @@ typedef enum eDepsOperation_Code {
 } eDepsOperation_Code;
 const char *operationCodeAsString(eDepsOperation_Code opcode);
 
-typedef enum eDepsNode_CollectionOwner {
-	/* Unknown owner of collection, collection is pulled directly, maybe
-	 * via driver.
-	 */
-	DEG_COLLECTION_OWNER_UNKNOWN,
-	/* Collection belongs to a scene. */
-	DEG_COLLECTION_OWNER_SCENE,
-	/* Collection is used by object, as a dupli-system. */
-	DEG_COLLECTION_OWNER_OBJECT,
-} eDepsNode_CollectionOwner;
-
 }  // namespace DEG
diff --git a/source/blender/depsgraph/intern/eval/deg_eval.cc b/source/blender/depsgraph/intern/eval/deg_eval.cc
index f911383b273..fb8b8e73ef6 100644
--- a/source/blender/depsgraph/intern/eval/deg_eval.cc
+++ b/source/blender/depsgraph/intern/eval/deg_eval.cc
@@ -103,6 +103,19 @@ typedef struct CalculatePengindData {
 	Depsgraph *graph;
 } CalculatePengindData;
 
+static bool check_operation_node_visible(OperationDepsNode *op_node)
+{
+	const ComponentDepsNode *comp_node = op_node->owner;
+	/* Special exception, copy on write component is to be always evaluated,
+	 * to keep copied "database" in a consistent state.
+	 */
+	if (comp_node->type == DEG_NODE_TYPE_COPY_ON_WRITE) {
+		return true;
+	}
+	const IDDepsNode *id_node = comp_node->owner;
+	return id_node->is_visible;
+}
+
 static void calculate_pending_func(
         void *__restrict data_v,
         const int i,
@@ -111,21 +124,35 @@ static void calculate_pending_func(
 	CalculatePengindData *data = (CalculatePengindData *)data_v;
 	Depsgraph *graph = data->graph;
 	OperationDepsNode *node = graph->operations[i];
-
+	/* Update counters, applies for both visible and invisible IDs. */
 	node->num_links_pending = 0;
 	node->scheduled = false;
-
-	/* count number of inputs that need updates */
-	if ((node->flag & DEPSOP_FLAG_NEEDS_UPDATE) != 0) {
-		foreach (DepsRelation *rel, node->inlinks) {
-			if (rel->from->type == DEG_NODE_TYPE_OPERATION &&
-			    (rel->flag & DEPSREL_FLAG_CYCLIC) == 0)
-			{
-				OperationDepsNode *from = (OperationDepsNode *)rel->from;
-				if ((from->flag & DEPSOP_FLAG_NEEDS_UPDATE) != 0) {
-					++node->num_links_pending;
-				}
+	/* Invisible IDs requires no pending operations. */
+	if (!check_operation_node_visible(node)) {
+		return;
+	}
+	/* No need to bother with anything if node is not tagged for update. */
+	if ((node->flag & DEPSOP_FLAG_NEEDS_UPDATE) == 0) {
+		return;
+	}
+	foreach (DepsRelation *rel, node->inlinks) {
+		if (rel->from->type == DEG_NODE_TYPE_OPERATION &&
+		    (rel->flag & DEPSREL_FLAG_CYCLIC) == 0)
+		{
+			OperationDepsNode *from = (OperationDepsNode *)rel->from;
+			/* TODO(sergey): This is how old layer system was checking for the
+			 * calculation, but how is it possible that visible object depends
+			 * on an invisible? This is something what is prohibited after
+			 * deg_graph_build_flush_layers().
+			 */
+			if (!check_operation_node_visible(from)) {
+				continue;
+			}
+			/* No need to vait for operation which is up to date. */
+			if ((from->flag & DEPSOP_FLAG_NEEDS_UPDATE) == 0) {
+				continue;
 			}
+			++node->num_links_pending;
 		}
 	}
 }
@@ -166,30 +193,44 @@ static void schedule_node(TaskPool *pool, Depsgraph *graph,
                           OperationDepsNode *node, bool dec_parents,
                           const int thread_id)
 {
-	if ((node->flag & DEPSOP_FLAG_NEEDS_UPDATE) != 0) {
-		if (dec_parents) {
-			BLI_assert(node->num_links_pending > 0);
-			atomic_sub_and_fetch_uint32(&node->num_links_pending, 1);
+	/* No need to schedule nodes of invisible ID. */
+	if (!check_operation_node_visible(node)) {
+		return;
+	}
+	/* No need to schedule operations which are not tagged for update, they are
+	 * considered to be up to date.
+	 */
+	if ((node->flag & DEPSOP_FLAG_NEEDS_UPDATE) == 0) {
+		return;
+	}
+	/* TODO(sergey): This is not strictly speaking safe to read
+	 * num_links_pending.
+  */
+	if (dec_parents) {
+		BLI_assert(node->num_links_pending > 0);
+		atomic_sub_and_fetch_uint32(&node->num_links_pending, 1);
+	}
+	/* Cal not schedule operation while its dependencies are not yet
+	 * evaluated.
+	 */
+	if (node->num_links_pending != 0) {
+		return;
+	}
+	bool is_scheduled = atomic_fetch_and_or_uint8(
+	        (uint8_t *)&node->scheduled, (uint8_t)true);
+	if (!is_scheduled) {
+		if (node->is_noop()) {
+			/* skip NOOP node, schedule children right away */
+			schedule_children(pool, graph, node, thread_id);
 		}
-
-		if (node->num_links_pending == 0) {
-			bool is_scheduled = atomic_fetch_and_or_uint8(
-			        (uint8_t *)&node->scheduled, (uint8_t)true);
-			if (!is_scheduled) {
-				if (node->is_noop()) {
-					/* skip NOOP node, schedule children right away */
-					schedule_children(pool, graph, node, thread_id);
-				}
-				else {
-					/* children are scheduled once this task is completed */
-					BLI_task_pool_push_from_thread(pool,
-					                               deg_task_run_func,
-					                               node,
-					                               false,
-					                               TASK_PRIORITY_HIGH,
-					                               thread_id);
-				}
-			}
+		else {
+			/* children are scheduled once this task is completed */
+			BLI_task_pool_push_from_thread(pool,
+			                               deg_task_run_func,
+			                               node,
+			                               false,
+			                               TASK_PRIORITY_HIGH,
+			                               thread_id);
 		}
 	}
 }
diff --git a/source/blender/depsgraph/intern/nodes/deg_node_id.cc b/source/blender/depsgraph/intern/nodes/deg_node_id.cc
index 3a164a50692..f2464cf98bd 100644
--- a/source/blender/depsgraph/intern/nodes/deg_node_id.cc
+++ b/source/blender/depsgraph/intern/nodes/deg_node_id.cc
@@ -104,6 +104,7 @@ void IDDepsNode::init(const ID *id, const char *UNUSED(subdata))
 	id_orig = (ID *)id;
 	eval_flags = 0;
 	linked_state = DEG_ID_LINKED_INDIRECTLY;
+	is_visible = true;
 
 	components = BLI_ghash_new(id_deps_node_hash_key,
 	                           id_deps_node_hash_key_cmp,
@@ -171,7 +172,8 @@ string IDDepsNode::identifier() const
 	BLI_snprintf(orig_ptr, sizeof(orig_ptr), "%p", id_orig);
 	BLI_snprintf(cow_ptr, sizeof(cow_ptr), "%p", id_cow);
 	return string(nodeTypeAsString(type)) + " : " + name +
-	        " (orig: " + orig_ptr + ", eval: " + cow_ptr + ")";
+	        " (orig: " + orig_ptr + ", eval: " + cow_ptr +
+	        ", is_visible " + (is_visible ? "true" : "false") + ")";
 }
 
 ComponentDepsNode *IDDepsNode::find_component(eDepsNode_Type type,
diff --git a/source/blender/depsgraph/intern/nodes/deg_node_id.h b/source/blender/depsgraph/intern/nodes/deg_node_id.h
index 12dbc16b4fa..8af7b80973b 100644
--- a/source/blender/depsgraph/intern/nodes/deg_node_id.h
+++ b/source/blender/depsgraph/intern/nodes/deg_node_id.h
@@ -77,6 +77,11 @@ struct IDDepsNode : public DepsNode {
 
 	eDepsNode_LinkedState_Type linked_state;
 
+	/* Indicates the datablock is visible, meaning, it is to be evaluated by
+	 * the dependency graph.
+	 */
+	bool is_visible;
+
 	DEG_DEPSNODE_DECLARE;
 };