Depsgraph: Begin work on making depsgraph per-scene-layer

This is a first step towards proper depsgraph "ownership", where
we would allow scene to be in multiple states dependent on active
workspace or scene layer.

This commit introduces a basic API to get proper dependency graph
for a given scene layer. It also renames scene->depsgraph to
depsgraph_legacy, so it's easier to search0-n-replace in the future.

1 files changed, 11 insertions, 5 deletions

diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index 3b2287a7921..7b103a3c56e 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -255,7 +255,7 @@ Scene *BKE_scene_copy(Main *bmain, Scene *sce, int type)
 
 		scen->ed = NULL;
 		scen->theDag = NULL;
-		scen->depsgraph = NULL;
+		scen->depsgraph_legacy = NULL;
 		scen->obedit = NULL;
 		scen->fps_info = NULL;
 
@@ -583,8 +583,8 @@ void BKE_scene_free_ex(Scene *sce, const bool do_id_user)
 	}
 	
 	DEG_scene_graph_free(sce);
-	if (sce->depsgraph)
-		DEG_graph_free(sce->depsgraph);
+	if (sce->depsgraph_legacy)
+		DEG_graph_free(sce->depsgraph_legacy);
 
 	MEM_SAFE_FREE(sce->fps_info);
 
@@ -1542,7 +1542,7 @@ void BKE_scene_update_tagged(EvaluationContext *eval_ctx, Main *bmain, Scene *sc
 	 *
 	 * in the future this should handle updates for all datablocks, not
 	 * only objects and scenes. - brecht */
-	DEG_evaluate_on_refresh(eval_ctx, scene->depsgraph, scene);
+	DEG_evaluate_on_refresh(eval_ctx, scene->depsgraph_legacy, scene);
 	/* TODO(sergey): This is to beocme a node in new depsgraph. */
 	BKE_mask_update_scene(bmain, scene);
 
@@ -1604,7 +1604,7 @@ void BKE_scene_update_for_newframe(EvaluationContext *eval_ctx, Main *bmain, Sce
 	BKE_main_id_tag_idcode(bmain, ID_LA, LIB_TAG_DOIT, false);
 
 	/* BKE_object_handle_update() on all objects, groups and sets */
-	DEG_evaluate_on_framechange(eval_ctx, bmain, sce->depsgraph, ctime);
+	DEG_evaluate_on_framechange(eval_ctx, bmain, sce->depsgraph_legacy, ctime);
 
 	/* update sound system animation (TODO, move to depsgraph) */
 	BKE_sound_update_scene(bmain, sce);
@@ -2250,3 +2250,9 @@ int BKE_scene_multiview_num_videos_get(const RenderData *rd)
 		return BKE_scene_multiview_num_views_get(rd);
 	}
 }
+
+Depsgraph* BKE_scene_get_depsgraph(Scene *scene, SceneLayer *scene_layer)
+{
+	(void) scene_layer;
+	return scene->depsgraph_legacy;
+}