Cycles: Support adding Lightgroups from the object/world properties

Currently, only Lightgroups that exist in the current view layer can be
selected from object or world properties.

The internal UI code already has support for search fields that accept
unknown input, so I just added that to the API and use it for lightgroups.

When a lightgroup is entered that does not exist in the current view layer
(e.g. because it's completely new, because the view layer was switched or
because it was deleted earlier), a new button next to it becomes active and
adds it to the view layer when pressed.

Differential Revision: https://developer.blender.org/D14540

1 files changed, 8 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/layer.c b/source/blender/blenkernel/intern/layer.c
index c99bf885074..1cc1839d2d0 100644
--- a/source/blender/blenkernel/intern/layer.c
+++ b/source/blender/blenkernel/intern/layer.c
@@ -2535,11 +2535,17 @@ static void viewlayer_lightgroup_active_set(ViewLayer *view_layer, ViewLayerLigh
   }
 }
 
-struct ViewLayerLightgroup *BKE_view_layer_add_lightgroup(struct ViewLayer *view_layer)
+struct ViewLayerLightgroup *BKE_view_layer_add_lightgroup(struct ViewLayer *view_layer,
+                                                          const char *name)
 {
   ViewLayerLightgroup *lightgroup;
   lightgroup = MEM_callocN(sizeof(ViewLayerLightgroup), __func__);
-  BLI_strncpy(lightgroup->name, DATA_("Lightgroup"), sizeof(lightgroup->name));
+  if (name && name[0]) {
+    BLI_strncpy(lightgroup->name, name, sizeof(lightgroup->name));
+  }
+  else {
+    BLI_strncpy(lightgroup->name, DATA_("Lightgroup"), sizeof(lightgroup->name));
+  }
   BLI_addtail(&view_layer->lightgroups, lightgroup);
   viewlayer_lightgroup_active_set(view_layer, lightgroup);
   viewlayer_lightgroup_make_name_unique(view_layer, lightgroup);