OpenGL with export display

  • Hello,
    I use a computer without X server, and I want to run Qt-4.8.4 OpenGL demos and examples while exporting the display on another computer running an X server with OpenGL 4.4.

    I tested these demos :

    and I also tested all the examples/opengl programs :
    2dpainting, framebufferobject, framebufferobject2, grabber, hellogl, overpainting, pbuffers, pbuffers2, samplebuffers and textures.

    Only the grabber example worked. The other ones either crashed, were totally empty or displayed only non-OpenGL elements.
    The boxes demo displayed an error MessageBox saying that I needed OpenGL 1.5 to run it, whereas the distant machine has OpenGL 4.0.

    Is this normal ? Is there a way to use OpenGL with Qt on a remote display ?

    Thank you

  • Lifetime Qt Champion

    Hi and welcome to devnet,

    For this use case, I'd recommend asking this on the interest mailing list you'll find there Qt's developers/maintainers (this forum is more user oriented)

  • I'm kinda surprised that there was one example worked. it seems to me that without x windows, opengl driver should not work at all.

    egl can support offline rendering, but it's not supported by nvidia driver I think.

    you can use mesa to do offline rendering and send it to remote computer in form of a video. and display the video on the other side.

    I knew someone did a remote opengl es on raspberry pi, can't find the link anymore.

    basically he sends opengl es commands via tcp.

  • X runs on the distant computer, so I think everything should work... Moreover, some OpenGL without Qt applications work, so OpenGL does not seem to be the problem....

Log in to reply

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.