Background Layer options

Fix for #2424
Added adjustable settings to the background layer to override project settings for texture filtering and texture repeating.

Author: zaknafean

addons/dialogic/Modules/Background/subsystem_backgrounds.gd

@@ -92,6 +92,7 @@ func update_background(scene := "", argument := "", fade_time := 0.0, transition
 		old_viewport = background_holder.get_meta('current_viewport', null)
 
 	var new_viewport: SubViewportContainer
+	
 	if scene.ends_with('.tscn') and ResourceLoader.exists(scene):
 		new_viewport = add_background_node(load(scene), background_holder)
 	elif argument:
@@ -175,7 +176,16 @@ func add_background_node(scene:PackedScene, parent:DialogicNode_BackgroundHolder
 	viewport.transparent_bg = true
 	viewport.disable_3d = true
 	viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
-	viewport.canvas_item_default_texture_filter = ProjectSettings.get_setting("rendering/textures/canvas_textures/default_texture_filter")
+
+	if parent.get_parent().get('bg_texture_filter') != null and parent.get_parent().bg_texture_filter > -1:
+		viewport.canvas_item_default_texture_filter = parent.get_parent().bg_texture_filter
+	else:
+		viewport.canvas_item_default_texture_filter = ProjectSettings.get_setting("rendering/textures/canvas_textures/default_texture_filter")
+
+	if parent.get_parent().get('bg_texture_repeat') != null and parent.get_parent().bg_texture_repeat > -1:
+		viewport.canvas_item_default_texture_repeat = parent.get_parent().bg_texture_repeat
+	else:
+		viewport.canvas_item_default_texture_repeat = ProjectSettings.get_setting("rendering/textures/canvas_textures/default_texture_repeat")
 
 	viewport.add_child(b_scene)
 	b_scene.viewport = viewport

addons/dialogic/Modules/DefaultLayoutParts/Layer_FullBackground/full_background_layer.gd

@@ -1,2 +1,31 @@
 @tool
 extends DialogicLayoutLayer
+
+# Awkward way of doing this, but we need a 'none' default to preserve compatiblity
+# These enums are just copies of Viewport.DefaultCanvasItemTextureFilter
+enum DefaultCanvasItemTextureFilter {
+	USE_PROJECT_SETTINGS,
+	NEAREST,
+	LINEAR,
+	LINEAR_WITH_MIPMAPS,
+	NEAREST_WITH_MIPMAPS
+}
+
+# These enums are just copies of Viewport.DefaultCanvasItemTextureRepeat
+enum DefaultCanvasItemTextureRepeat {
+	USE_PROJECT_SETTINGS,
+	DISABLED,
+	ENABLED,
+	REPEAT_MIRROR
+}
+
+
+@export var bg_texture_filter : DefaultCanvasItemTextureFilter = DefaultCanvasItemTextureFilter.USE_PROJECT_SETTINGS
+@export var bg_texture_repeat : DefaultCanvasItemTextureRepeat = DefaultCanvasItemTextureRepeat.USE_PROJECT_SETTINGS
+
+
+func _ready() -> void:
+	# This is a work around to the style editor not accepting negative numbered enums
+	# This allows the enum values to properly match the Viewport defaults
+	bg_texture_filter = bg_texture_filter -1
+	bg_texture_repeat = bg_texture_repeat -1