/* This function has cost me 5 days of trying to find some
 * way to make gtk/pango/gdk do this. I’m only using
 * this way because 2 gtk/pango developers said this is the
 * only way at this time. So if you change it.. Your changes
 * better f*cking work :P
 */

Source: Direct link to the source code
Software: Guifications
Programming language: C