GPencil: Fix User count error when use python to create object

The user count was 2, when the real value must be 1.

The problem was the datablock was created with one user by default.

See: D5131
Reviewers: @mont29

1 files changed, 12 insertions, 2 deletions

diff --git a/source/blender/makesrna/intern/rna_main_api.c b/source/blender/makesrna/intern/rna_main_api.c
index 1a5e5fa9634..f0f22d21078 100644
--- a/source/blender/makesrna/intern/rna_main_api.c
+++ b/source/blender/makesrna/intern/rna_main_api.c
@@ -664,6 +664,16 @@ static LightProbe *rna_Main_lightprobe_new(Main *bmain, const char *name)
   return probe;
 }
 
+static bGPdata *rna_Main_gpencils_new(Main *bmain, const char *name)
+{
+  char safe_name[MAX_ID_NAME - 2];
+  rna_idname_validate(name, safe_name);
+
+  bGPdata *gpd = BKE_gpencil_data_addnew(bmain, safe_name);
+  id_us_min(&gpd->id);
+  return gpd;
+}
+
 /* tag functions, all the same */
 #  define RNA_MAIN_ID_TAG_FUNCS_DEF(_func_name, _listbase_name, _id_type) \
     static void rna_Main_##_func_name##_tag(Main *bmain, bool value) \
@@ -1866,8 +1876,8 @@ void RNA_def_main_gpencil(BlenderRNA *brna, PropertyRNA *cprop)
   parm = RNA_def_boolean(func, "value", 0, "Value", "");
   RNA_def_parameter_flags(parm, 0, PARM_REQUIRED);
 
-  func = RNA_def_function(srna, "new", "BKE_gpencil_data_addnew");
-  RNA_def_function_flag(func, FUNC_NO_SELF | FUNC_USE_MAIN);
+  func = RNA_def_function(srna, "new", "rna_Main_gpencils_new");
+  RNA_def_function_ui_description(func, "Add a new grease pencil datablock to the main database");
   parm = RNA_def_string(func, "name", "GreasePencil", 0, "", "New name for the data-block");
   RNA_def_parameter_flags(parm, 0, PARM_REQUIRED);
   /* return type */