[Mesa-dev] Remove classic drivers or fork src/mesa for gallium?

[Adam Jackson]

On Sun, 2020-03-29 at 09:45 -0700, Kristian Høgsberg wrote:

> As for loading, doesn't glvnd solve that?

It could. It does not. Right now there's not a (good) way for the DDX
driver to communicate a preferred implementation name to the GLX
client. xserver's glx just knows it needs an implementation named mesa,
and nvidia's glx, nvidia. Not a hard thing to wire up, and in fact you
can give multiple names and the client side will try them in sequence
so fallback stands a chance of working.

Now, if we're doing that, we should maybe consider using glvnd's
libGLdispatch directly, as I think right now we have an ugly double-
indirection between glHamSandwichEXT and _mesa_HamSandwichEXT if you're
building for glvnd. The only thing in the world besides Mesa that cares
about glapi and what a DRI driver interface is is xserver, and that's a
detail I'd like to eliminate and the new EGL-backed GLX in Xwayland
gets really close to eliminating it. But if nobody else gets excited
that much about fixing GLX, I completely understand.

- ajax