QGLWidget with custom OpenGL context

matrem

Hello,

I'm trying to have my custom context creation works with QGLwidget, by creating a custom QGLContext.

But I'm facing a problem on Linux (so with GLX):
The visual I get from my FrameBuffer configuration ( glXChooseFBConfig / glXGetVisualFromFBConfig ) is not compatible with the one in the QGWidget.
And so the glXCreateWindow needed for glXCreateContextAttribsARB, fails.

I would like to know if it's possible to update or create the QGLWidget from my visual?

Because it's seems important to match the glx concept :

FrameBufferConfiguration creation
Visual retrieving
XWindow creation from visual ( so my qt widget )
GLXWindow creation from FBConfig and XWindow
GLXContext creation from GLXWindow & FBConfig

matrem

I finally solver my problem by :

converting my XVisualInfo in a compatible QGLFormat
constructing my QGLWidget with this format
setDevice to my custom context with the qglwidget instance
setContext on the qglwidget with my custom context

matrem

I wrote a small article to describe that : http://virtrev.blogspot.fr/2012/12/custom-opengl-context-with-qt.html