GP: Add new Userprefs parameter to reverse layer list

This allows to configure the system as any other 2D software with the layers in a Top/Down order.

2 files changed, 8 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_userdef_types.h b/source/blender/makesdna/DNA_userdef_types.h
index 7c28ff9301f..a18ed19a306 100644
--- a/source/blender/makesdna/DNA_userdef_types.h
+++ b/source/blender/makesdna/DNA_userdef_types.h
@@ -883,8 +883,9 @@ typedef enum eText_Draw_Options {
 /* Grease Pencil Settings.
  * UserDef.gp_settings */
 typedef enum eGP_UserdefSettings {
-	GP_PAINT_DOSMOOTH		= (1 << 0),
-	GP_PAINT_DOSIMPLIFY		= (1 << 1),
+	GP_PAINT_DOSMOOTH		    = (1 << 0),
+	GP_PAINT_DOSIMPLIFY		    = (1 << 1),
+	GP_PAINT_REVERSE_LAYERS     = (1 << 2),
 } eGP_UserdefSettings;
 
 enum {
diff --git a/source/blender/makesrna/intern/rna_userdef.c b/source/blender/makesrna/intern/rna_userdef.c
index 8f3d3342f43..ad0d5cee797 100644
--- a/source/blender/makesrna/intern/rna_userdef.c
+++ b/source/blender/makesrna/intern/rna_userdef.c
@@ -3994,6 +3994,11 @@ static void rna_def_userdef_edit(BlenderRNA *brna)
 	RNA_def_property_boolean_sdna(prop, NULL, "gp_settings", GP_PAINT_DOSIMPLIFY);
 	RNA_def_property_ui_text(prop, "Grease Pencil Simplify Stroke", "Simplify the final stroke");
 
+	prop = RNA_def_property(srna, "use_grease_pencil_reverse_layers", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "gp_settings", GP_PAINT_REVERSE_LAYERS);
+	RNA_def_property_ui_text(prop, "Layers list Top-Down",
+		"Order the grease pencil list of layers from Top to Down (require restart)");
+	
 	prop = RNA_def_property(srna, "grease_pencil_eraser_radius", PROP_INT, PROP_PIXEL);
 	RNA_def_property_int_sdna(prop, NULL, "gp_eraser");
 	RNA_def_property_range(prop, 1, 500);