will use config string this time

src/net/torvald/terrarumtypewriterbitmap/gdx/TerrarumTypewriterBitmap.kt

@@ -1,12 +1,26 @@
 package net.torvald.terrarumtypewriterbitmap.gdx
 
 import com.badlogic.gdx.graphics.g2d.BitmapFont
+import java.io.File
+import java.io.Reader
 
 /**
+ * Config File Syntax:
+ *
+ * ```
+ * identifier,image file name,relative codepoint
+ * # working example:
+ * intl_qwerty_typewriter,typewriter_intl_qwerty.tga,0
+ * ko_kr_3set-390_typewriter,typewriter_ko_3set-390.tga,16
+ * ```
+ *
+ * // the Relative Codepoint of 16 should point to U+F3000
+ *
  * Created by minjaesong on 2021-11-04.
  */
 class TerrarumTypewriterBitmap(
         fontDir: String,
+        configFile: Reader,
         val flipY: Boolean = false,
         var errorOnUnknownChar: Boolean = false,
         val textCacheSize: Int = 256,