Fix missing Cycles 3D viewport updates when editing materials, lamps.

This introduces a new depsgraph API for getting updated datablocks,
rather than getting it from bpy.data.

* depsgraph.ids_updated gives a list of all datablocks in the depsgraph
  which have been updated.
* depsgraph.id_type_updated('TYPE') is true if any datablock of the given
  type has been added, removed or modified.

More API updates are coming to properly handle multiple depsgraphs and
finer update granularity, but this should make Cycles work again.

1 files changed, 18 insertions, 2 deletions

diff --git a/source/blender/depsgraph/DEG_depsgraph_query.h b/source/blender/depsgraph/DEG_depsgraph_query.h
index 99c5d2dc291..7a4d9a19335 100644
--- a/source/blender/depsgraph/DEG_depsgraph_query.h
+++ b/source/blender/depsgraph/DEG_depsgraph_query.h
@@ -66,7 +66,8 @@ float DEG_get_ctime(const Depsgraph *graph);
 /* ********************* DEG evaluated data ******************* */
 
 /* Check if given ID type was tagged for update. */
-bool DEG_id_type_tagged(struct Main *bmain, short id_type);
+bool DEG_id_type_updated(const struct Depsgraph *depsgraph, short id_type);
+bool DEG_id_type_any_updated(const struct Depsgraph *depsgraph);
 
 /* Get additional evaluation flags for the given ID. */
 short DEG_get_eval_flags_for_id(const struct Depsgraph *graph, struct ID *id);
@@ -96,7 +97,7 @@ struct Object *DEG_get_original_object(struct Object *object);
 /* Get original version of given evaluated ID datablock. */
 struct ID *DEG_get_original_id(struct ID *id);
 
-/* ************************ DEG iterators ********************* */
+/* ************************ DEG object iterators ********************* */
 
 enum {
 	DEG_ITER_OBJECT_FLAG_LINKED_DIRECTLY   = (1 << 0),
@@ -181,6 +182,21 @@ void DEG_iterator_objects_end(struct BLI_Iterator *iter);
 #define DEG_OBJECT_ITER_FOR_RENDER_ENGINE_END                             \
 	DEG_OBJECT_ITER_END
 
+
+/* ************************ DEG ID iterators ********************* */
+
+typedef struct DEGIDIterData {
+	struct Depsgraph *graph;
+	bool only_updated;
+
+	size_t id_node_index;
+	size_t num_id_nodes;
+} DEGIDIterData;
+
+void DEG_iterator_ids_begin(struct BLI_Iterator *iter, DEGIDIterData *data);
+void DEG_iterator_ids_next(struct BLI_Iterator *iter);
+void DEG_iterator_ids_end(struct BLI_Iterator *iter);
+
 /* ************************ DEG traversal ********************* */
 
 typedef void (*DEGForeachIDCallback)(ID *id, void *user_data);