Graphic card drivers do not support OpenGL 2.0

[Mazzon Alex]

When i run FOS, the program shows a blank window and following messages log in debug:

getProcAddress: Unable to resolve 'glGenRenderbuffersEXT'
getProcAddress: Unable to resolve 'glBindRenderbuffer'
getProcAddress: Unable to resolve 'glBindRenderbufferOES'
getProcAddress: Unable to resolve 'glBindRenderbufferARB'
getProcAddress: Unable to resolve 'glBindRenderbufferEXT'
getProcAddress: Unable to resolve 'glRenderbufferStorage'
getProcAddress: Unable to resolve 'glRenderbufferStorageOES'
...

Ideally FOS must reconize this issue and ask the user to install the graphic card drivers.

See: http://stackoverflow.com/questions/20530157/issue-with-compiling-qtquick-applications-with-qt5-2mingwopengl

See also the slot sceneGraphError() in the QtQuick2ApplicationViewer which is actually connected to the signal but it seems like the signal doesn't get fired.

Read http://qt-project.org/wiki/Qt-5-on-Windows-ANGLE-and-OpenGL for more info about OpenGL and ANGLE