[Bf-blender-cvs] [c544df997ed] master: Fix user counting when ungrouping a node group.
Maxim Vasiliev
noreply at git.blender.org
Mon Apr 6 16:30:37 CEST 2020
Commit: c544df997ed9869ee053f1b45e1da6d8bf5f5e9c
Author: Maxim Vasiliev
Date: Mon Apr 6 16:23:43 2020 +0200
Branches: master
https://developer.blender.org/rBc544df997ed9869ee053f1b45e1da6d8bf5f5e9c
Fix user counting when ungrouping a node group.
Existing code for ungrouping did not correctly handle user counters:
- counter for the group was not decremented
- counters for containing nodes were not incremented
The latter resulted in losing some nodes after orphan cleaning or several save/reload cycles.
The bug did not have destructive consequences until recently,
because it was compensated by another bug (fixed in rBe993667a46c2).
Maniphest Tasks: T74665, T74682
Differential Revision: https://developer.blender.org/D7332
===================================================================
M source/blender/editors/space_node/node_group.c
===================================================================
diff --git a/source/blender/editors/space_node/node_group.c b/source/blender/editors/space_node/node_group.c
index 2a4c6147d5d..3a0ef45a68d 100644
--- a/source/blender/editors/space_node/node_group.c
+++ b/source/blender/editors/space_node/node_group.c
@@ -193,11 +193,11 @@ static int node_group_ungroup(Main *bmain, bNodeTree *ntree, bNode *gnode)
}
/* wgroup is a temporary copy of the NodeTree we're merging in
- * - all of wgroup's nodes are transferred across to their new home
+ * - all of wgroup's nodes are copied across to their new home
* - ngroup (i.e. the source NodeTree) is left unscathed
- * - temp copy. don't change ID usercount
+ * - temp copy. do change ID usercount for the copies
*/
- wgroup = ntreeCopyTree_ex_new_pointers(ngroup, bmain, false);
+ wgroup = ntreeCopyTree_ex_new_pointers(ngroup, bmain, true);
/* Add the nodes into the ntree */
for (node = wgroup->nodes.first; node; node = nextnode) {
@@ -351,8 +351,8 @@ static int node_group_ungroup(Main *bmain, bNodeTree *ntree, bNode *gnode)
nodeRemoveNode(bmain, ntree, node, false);
}
- /* delete the group instance */
- nodeRemoveNode(bmain, ntree, gnode, false);
+ /* delete the group instance and dereference group tree */
+ nodeRemoveNode(bmain, ntree, gnode, true);
ntree->update |= NTREE_UPDATE_NODES | NTREE_UPDATE_LINKS;
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