Finally fixed font texture

ArkaLabel.gd

@@ -0,0 +1,20 @@
+@tool
+extends Label
+
+class_name ArkaLabel
+
+func _ready() -> void:
+	set_notify_transform(true)
+	material = load("res://ArkanoidMaterial.tres").duplicate()
+	theme = load("res://MainTheme.tres")
+	theme_type_variation = "Arkanoid"
+	material.set_shader_parameter("rect_global_position", global_position / get_viewport_rect().size)
+	material.set_shader_parameter("rect_size", get_rect().size)
+
+func _notification(what: int) -> void:
+	if what == NOTIFICATION_TRANSFORM_CHANGED:
+		var pos = global_position / get_viewport_rect().size
+		print(pos)
+		material.set_shader_parameter("rect_global_position", pos)
+		material.set_shader_parameter("rect_size", get_rect().size)
+