
With Arcan and OpenBSD, they are striving for "secure system graphics" given the security focus of the OpenBSD project. In a new post on the project's blog, they outlined some of the challenges in porting this large code-base to this security-minded BSD.
Among the issues encountered were OpenBSD's lack of DRM render nodes and DMA buffers (DMA_BUF) for the DRI/DRM code. The libwayland-server code also hasn't been ported to OpenBSD and does have some security challenges of its own.
But if you are interested in the concept of secure system graphics and/or BSD graphics porting work, check out the Arcan project blog for all of their details on this recent exercise.
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