Qt is a cross-platform application and UI framework for developers
using C++ or QML, a CSS/JavaScript-like language.

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

http://qt-project.org/doc/qt-4.8/qapplication.html#setGraphicsSystem
http://blog.qt.digia.com/blog/2008/10/22/so-long-and-thanks-for-the-blit

WWW: http://qt-project.org