[Wayland-bugs] [Bug 83984] Add software GL-renderer support to the headless backend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83984

--- Comment #3 from Pekka Paalanen <ppaalanen at gmail.com> ---
Right, I asked around on #dri-devel and looked at Mesa a bit. The null platform
has indeed been replaced by surfaceless, which apparently doesn't support
software renderers. So, it requires implementing sw support in
platform_surfaceless.c in Mesa. platform_wayland.c recently just got sw
support, so maybe there's something to peek on.

Software rendering would be quite useful for CI testing, because the buildbot
would not need a real DRM device and could easily be a virtual machine etc.

However, I suppose if platform_surfaceless can gain sw support later, it would
not be a wasted effort to use platform_surfaceless with a real driver on a
render node now. Getting the gl-renderer into the test suite coverage would be
quite a big improvement.

So, it might make sense to finish bug #83985 first, reverting the bug
dependency.

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