Xerxes Rånby wrote

katzii wrote

Thank you for your answer, Sven. I will just go for the newer PI and try this out. If this doesn't work, I will do my best to fix this, since I really enjoy this particular use case :) So if patches are generally accepted, I would love to put the work into this.

Cheers

* VideoCore 6 on the Raspberry Pi 4 is only supported by the Mesa 3D drivers.
If you try to force use of the Broadcom driver then the Broadcom driver will issue an error statement that raspberry pi 4 is not supported and quit your application.

* Running OpenGL or OpenGL ES initialized using EGL without X11 on Raspberry Pi 4 is possible using the Linux Kernel Modesetting driver (KMS) API in combination with the Mesa Generic Buffer Management (GBM) API.

* KMS Cube is Mesa 3D example application that initialized EGL using GBM and KMS https://gitlab.freedesktop.org/mesa/kmscube/ This application work directly from console if you compile it and run it on a Raspberry Pi 4.

* JOGL needs to be extended in order to  support initialization of EGL using GBM/KMS. However some attempts have already been made to implement support for GBM/KMS for other linux systems:

https://jogamp.org/bugzilla/show_bug.cgi?id=1156 - Newt EGL/GBM (KMS) driver
* https://github.com/Zubnix/jogl/commits/master <- proof of concept implementation of NEWT GBM/KMS driver, try this


Cheers
Xerxes