[Bf-blender-cvs] [f8bed5ccdcc] master: GPencil: New API to remove grease pencil material settings

[Antonioya]

Commit: f8bed5ccdccdd36e0ce4bfb8c95c50a30207da59
Author: Antonioya
Date:   Thu May 2 16:26:57 2019 +0200
Branches: master
https://developer.blender.org/rBf8bed5ccdccdd36e0ce4bfb8c95c50a30207da59

GPencil: New API to remove grease pencil material settings

This is required for some add-ons

Example use:
ma = bpy.data.materials[0]
# create settings
bpy.data.materials.create_gpencil_data(ma)
# remove settings
bpy.data.materials.remove_gpencil_data(ma)

Related to T63707

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

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

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

diff --git a/source/blender/makesrna/intern/rna_main_api.c b/source/blender/makesrna/intern/rna_main_api.c
index d5347e77348..b21cd3324b8 100644
--- a/source/blender/makesrna/intern/rna_main_api.c
+++ b/source/blender/makesrna/intern/rna_main_api.c
@@ -273,6 +273,15 @@ static void rna_Main_materials_gpencil_data(Main *UNUSED(bmain), PointerRNA *id_
   BKE_material_init_gpencil_settings(ma);
 }
 
+static void rna_Main_materials_gpencil_remove(Main *UNUSED(bmain), PointerRNA *id_ptr)
+{
+  ID *id = id_ptr->data;
+  Material *ma = (Material *)id;
+  if (ma->gp_style) {
+    MEM_SAFE_FREE(ma->gp_style);
+  }
+}
+
 static const EnumPropertyItem *rna_Main_nodetree_type_itemf(bContext *UNUSED(C),
                                                             PointerRNA *UNUSED(ptr),
                                                             PropertyRNA *UNUSED(prop),
@@ -850,6 +859,11 @@ void RNA_def_main_materials(BlenderRNA *brna, PropertyRNA *cprop)
   parm = RNA_def_pointer(func, "material", "Material", "", "Material");
   RNA_def_parameter_flags(parm, PROP_NEVER_NULL, PARM_REQUIRED | PARM_RNAPTR);
 
+  func = RNA_def_function(srna, "remove_gpencil_data", "rna_Main_materials_gpencil_remove");
+  RNA_def_function_ui_description(func, "Remove grease pencil material settings");
+  parm = RNA_def_pointer(func, "material", "Material", "", "Material");
+  RNA_def_parameter_flags(parm, PROP_NEVER_NULL, PARM_REQUIRED | PARM_RNAPTR);
+
   func = RNA_def_function(srna, "remove", "rna_Main_ID_remove");
   RNA_def_function_flag(func, FUNC_USE_REPORTS);
   RNA_def_function_ui_description(func, "Remove a material from the current blendfile");