New viewlayer deferred resync code: add utils to ensure resync of whole Scene and Main.

Similar to existing `BKE_main_collection_sync` and `BKE_scene_collection_sync`,
in some cases code does not have access to a specific view layer,
and/or does not know exactly which view layer needs to be in sync,
or just need the full data to be up to date.

2 files changed, 20 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_layer.h b/source/blender/blenkernel/BKE_layer.h
index 8cfc9ef8be9..88a340b11a7 100644
--- a/source/blender/blenkernel/BKE_layer.h
+++ b/source/blender/blenkernel/BKE_layer.h
@@ -585,6 +585,9 @@ struct LayerCollection *BKE_view_layer_active_collection_get(struct ViewLayer *v
 void BKE_view_layer_need_resync_tag(struct ViewLayer *view_layer);
 void BKE_view_layer_synced_ensure(const struct Scene *scene, struct ViewLayer *view_layer);
 
+void BKE_scene_view_layers_synced_ensure(const struct Scene *scene);
+void BKE_main_view_layers_synced_ensure(const struct Main *bmain);
+
 struct ViewLayerAOV *BKE_view_layer_add_aov(struct ViewLayer *view_layer);
 void BKE_view_layer_remove_aov(struct ViewLayer *view_layer, struct ViewLayerAOV *aov);
 void BKE_view_layer_set_active_aov(struct ViewLayer *view_layer, struct ViewLayerAOV *aov);
diff --git a/source/blender/blenkernel/intern/layer.c b/source/blender/blenkernel/intern/layer.c
index 12472cf9dc5..fe11dc99bac 100644
--- a/source/blender/blenkernel/intern/layer.c
+++ b/source/blender/blenkernel/intern/layer.c
@@ -975,6 +975,23 @@ void BKE_view_layer_synced_ensure(const Scene *scene, struct ViewLayer *view_lay
   }
 }
 
+void BKE_scene_view_layers_synced_ensure(const Scene *scene)
+{
+  LISTBASE_FOREACH (ViewLayer *, view_layer, &scene->view_layers) {
+    BKE_view_layer_synced_ensure(scene, view_layer);
+  }
+}
+
+void BKE_main_view_layers_synced_ensure(const Main *bmain)
+{
+  for (const Scene *scene = bmain->scenes.first; scene; scene = scene->id.next) {
+    BKE_scene_view_layers_synced_ensure(scene);
+  }
+
+  /* NOTE: This is not (yet?) covered by the dirty tag and deffered resync system */
+  BKE_layer_collection_local_sync_all(bmain);
+}
+
 static void layer_collection_objects_sync(ViewLayer *view_layer,
                                           LayerCollection *layer,
                                           ListBase *r_lb_new_object_bases,