Refactor ID copying (and to some extent, ID freeing).

This will allow much finer controll over how we copy data-blocks, from
full copy in Main database, to "lighter" ones (out of Main, inside an
already allocated datablock, etc.).

This commit also transfers a llot of what was previously handled by
per-ID-type custom code to generic ID handling code in BKE_library.
Hopefully will avoid in future inconsistencies and missing bits we had
all over the codebase in the past.

It also adds missing copying handling for a few types, most notably
Scene (which where using a fully customized handling previously).

Note that the type of allocation used during copying (regular in Main,
allocated but outside of Main, or not allocated by ID handling code at
all) is stored in ID's, which allows to handle them correctly when
freeing. This needs to be taken care of with caution when doing 'weird'
unusual things with ID copying and/or allocation!

As a final note, while rather noisy, this commit will hopefully not
break too much existing branches, old 'API' has been kept for the main
part, as a wrapper around new code. Cleaning it up will happen later.

Design task : T51804
Phab Diff: D2714

1 files changed, 7 insertions, 6 deletions

diff --git a/source/blender/blenkernel/intern/anim_sys.c b/source/blender/blenkernel/intern/anim_sys.c
index 539901a59d5..6afa251bce7 100644
--- a/source/blender/blenkernel/intern/anim_sys.c
+++ b/source/blender/blenkernel/intern/anim_sys.c
@@ -259,7 +259,7 @@ void BKE_animdata_free(ID *id, const bool do_id_user)
 /* Copying -------------------------------------------- */
 
 /* Make a copy of the given AnimData - to be used when copying datablocks */
-AnimData *BKE_animdata_copy(AnimData *adt, const bool do_action)
+AnimData *BKE_animdata_copy(Main *bmain, AnimData *adt, const bool do_action)
 {
 	AnimData *dadt;
 	
@@ -270,8 +270,9 @@ AnimData *BKE_animdata_copy(AnimData *adt, const bool do_action)
 	
 	/* make a copy of action - at worst, user has to delete copies... */
 	if (do_action) {
-		dadt->action = BKE_action_copy(G.main, adt->action);
-		dadt->tmpact = BKE_action_copy(G.main, adt->tmpact);
+		BLI_assert(bmain != NULL);
+		BKE_id_copy_ex(bmain, (ID *)dadt->action, (ID **)&dadt->action, 0, false);
+		BKE_id_copy_ex(bmain, (ID *)dadt->tmpact, (ID **)&dadt->tmpact, 0, false);
 	}
 	else {
 		id_us_plus((ID *)dadt->action);
@@ -291,7 +292,7 @@ AnimData *BKE_animdata_copy(AnimData *adt, const bool do_action)
 	return dadt;
 }
 
-bool BKE_animdata_copy_id(ID *id_to, ID *id_from, const bool do_action)
+bool BKE_animdata_copy_id(Main *bmain, ID *id_to, ID *id_from, const bool do_action)
 {
 	AnimData *adt;
 
@@ -303,7 +304,7 @@ bool BKE_animdata_copy_id(ID *id_to, ID *id_from, const bool do_action)
 	adt = BKE_animdata_from_id(id_from);
 	if (adt) {
 		IdAdtTemplate *iat = (IdAdtTemplate *)id_to;
-		iat->adt = BKE_animdata_copy(adt, do_action);
+		iat->adt = BKE_animdata_copy(bmain, adt, do_action);
 	}
 
 	return true;
@@ -1347,7 +1348,7 @@ void BKE_keyingset_free_path(KeyingSet *ks, KS_Path *ksp)
 }
 
 /* Copy all KeyingSets in the given list */
-void BKE_keyingsets_copy(ListBase *newlist, ListBase *list)
+void BKE_keyingsets_copy(ListBase *newlist, const ListBase *list)
 {
 	KeyingSet *ksn;
 	KS_Path *kspn;