QT and OpenGL transform. matrices

Hi! Is here anybody who knows how to correctly convert QT world matrix format to OpenGL one for 2D case? QT uses folowing format:
[http://doc.trolltech.com/3.2/qwmatrix.html#details](http:// <a href=) " target=“_blank”> http://doc.trolltech.com/3.2/qwmatrix.html#details </a>