Qt provides a platform-independent API to all central platform
functionality: GUI, database access, networking, file handling,
etc.

This port provides OpenGL graphics backend, which is used for
on-screen widgets and QPixmaps. See for details:

http://doc.qt.nokia.com/4.7/qapplication.html#setGraphicsSystem
http://labs.qt.nokia.com/2008/10/22/so-long-and-thanks-for-the-blit/

WWW:	http://qt.nokia.com/products/qt/index.html