General points
==============

One global entry point for each module:

g_i18n_list_functions()

 function : language : vtable


Tool:

 gi18n-updatedb

Input Method Module
===================

 Functions:

 Callbacks:

   Set the status area contents
   Set the preedit string contents
   Position the caret
   Begin preediting
   End preediting

Shaping Module
=============

 Segment input text
 Turn characters into glyphs
 Provide line-break information 
 

Output Modules
==============

 Position/justify glyphs