[Mesa-dev] [RFC 0/6] Remove stubbed GLX_SGIX_swap_{barrier, group}

[Ian Romanick]

On 03/05/2018 10:48 AM, Emil Velikov wrote:
> Hi all,
> 
> It seems like these two extensions were never implemented or advertised.
> Be that in:
>  - glx/dri
>  - glx/apple
>  - classic xlib-glx
>  - gallium xlib-glx
> 
> Yet, the entry points were available, hence apps might have linked
> against it.

If an app was linking with an extension entry point instead of using
glXGetProcAddress, it is the app's bug.

> Furthermore I cannot see any users of those on my system and a courtesy 
> google search. Additionally the Nvidia driver (checked version 390.25) 
> does not implement/advertise them either.
> 
> That said, I'm fairly confident that we can safely remove the no-op 
> stubs. Even though that the entry points were statically exposed.
> 
> Brian, Ian,
> 
> Do you have any recollection about these experimental SGI extensions?

Ajax and I had talked about implementing swap_group a few times, but
there were some technical challenges that we were too lazy to tackle.  I
think that's about as far as any of it ever got.

> Thanks
> Emil
> 
> Cc: Ian Romanick <ian.d.romanick at intel.com>
> Cc: Brian Paul <brianp at vmware.com>
> 
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