Depsgraph: completely move customdata_mask to the ID node.

Move all mask-related fields from Object and OperationDepsNode
to Object_Runtime and IDDepsNode. Auto-apply DEG_TAG_GEOMETRY
if the mask changes after DEG rebuild. Update DEG API and all
code that uses it.

This fixes "source mesh data is not ready" errors from Data
Transfer modifier when parameters are changed in the UI after
the recent mesh_get_eval_final fix.

Reviewers: sergey

Differential Revision: https://developer.blender.org/D4025

1 files changed, 22 insertions, 0 deletions

diff --git a/source/blender/depsgraph/intern/depsgraph_query.cc b/source/blender/depsgraph/intern/depsgraph_query.cc
index 946917afb26..c6ade6ac4c3 100644
--- a/source/blender/depsgraph/intern/depsgraph_query.cc
+++ b/source/blender/depsgraph/intern/depsgraph_query.cc
@@ -122,6 +122,28 @@ uint32_t DEG_get_eval_flags_for_id(const Depsgraph *graph, ID *id)
 	return id_node->eval_flags;
 }
 
+uint64_t DEG_get_customdata_mask_for_object(const Depsgraph *graph, Object *ob)
+{
+	if (graph == NULL) {
+		/* Happens when converting objects to mesh from a python script
+		 * after modifying scene graph.
+		 *
+		 * Currently harmless because it's only called for temporary
+		 * objects which are out of the DAG anyway.
+		 */
+		return 0;
+	}
+
+	const DEG::Depsgraph *deg_graph = reinterpret_cast<const DEG::Depsgraph *>(graph);
+	const DEG::IDDepsNode *id_node = deg_graph->find_id_node(DEG_get_original_id(&ob->id));
+	if (id_node == NULL) {
+		/* TODO(sergey): Does it mean we need to check set scene? */
+		return 0;
+	}
+
+	return id_node->customdata_mask;
+}
+
 Scene *DEG_get_evaluated_scene(const Depsgraph *graph)
 {
 	const DEG::Depsgraph *deg_graph =