OpenGL with export display
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 ?
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....