[Bf-blender-cvs] [101d04f41ff] master: Fix T103564: creating a color attribute doesn't make it active

[Philipp Oeser]

Commit: 101d04f41ffbb72bf20e7c2b15f1bb868328cd03
Author: Philipp Oeser
Date:   Mon Jan 2 15:27:00 2023 +0100
Branches: master
https://developer.blender.org/rB101d04f41ffbb72bf20e7c2b15f1bb868328cd03

Fix T103564: creating a color attribute doesn't make it active

This was the case when done via the py-API.

Now also set active_color_attribute / default_color_attribute on newly
created attributes (in case none exist yet).

Maniphest Tasks: T103564

Differential Revision: https://developer.blender.org/D16898

===================================================================

M	source/blender/makesrna/intern/rna_attribute.c

===================================================================

diff --git a/source/blender/makesrna/intern/rna_attribute.c b/source/blender/makesrna/intern/rna_attribute.c
index f2afbdcce2b..67d0e8adef5 100644
--- a/source/blender/makesrna/intern/rna_attribute.c
+++ b/source/blender/makesrna/intern/rna_attribute.c
@@ -389,6 +389,17 @@ static PointerRNA rna_AttributeGroup_new(
     ID *id, ReportList *reports, const char *name, const int type, const int domain)
 {
   CustomDataLayer *layer = BKE_id_attribute_new(id, name, type, domain, reports);
+
+  if ((GS(id->name) == ID_ME) && ELEM(layer->type, CD_PROP_COLOR, CD_PROP_BYTE_COLOR)) {
+    Mesh *mesh = (Mesh *)id;
+    if (!mesh->active_color_attribute) {
+      mesh->active_color_attribute = BLI_strdup(layer->name);
+    }
+    if (!mesh->default_color_attribute) {
+      mesh->default_color_attribute = BLI_strdup(layer->name);
+    }
+  }
+
   DEG_id_tag_update(id, ID_RECALC_GEOMETRY);
   WM_main_add_notifier(NC_GEOM | ND_DATA, id);