Add an option to free scene without doing id-counters

This is similar to some other datablocks. Mainly applies to collections,
so freeing scene does not involve changing any non-directly owned data.

There are two main usecases foreseen for the future:

- Less CPU ticks on bmain free, where everything is freed anyway and
  there is no need to preserve id counters.

- Easier freeing of temporary data, including data which is used by
  depsgraph's copy-on-write mechanism.

Neither of those are currently implemented, but will be shortly.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_scene.h b/source/blender/blenkernel/BKE_scene.h
index cd59ef98903..5047070012c 100644
--- a/source/blender/blenkernel/BKE_scene.h
+++ b/source/blender/blenkernel/BKE_scene.h
@@ -71,6 +71,7 @@ struct Base *_setlooper_base_step(struct Scene **sce_iter, struct Base *base);
 void free_avicodecdata(struct AviCodecData *acd);
 void free_qtcodecdata(struct QuicktimeCodecData *acd);
 
+void BKE_scene_free_ex(struct Scene *sce, const bool do_id_user);
 void BKE_scene_free(struct Scene *sce);
 void BKE_scene_init(struct Scene *sce);
 struct Scene *BKE_scene_add(struct Main *bmain, const char *name);