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

[Ian Romanick]

On 03/05/2018 11:08 AM, Ian Romanick wrote:
> 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.

I should have also said...

Acked-by: Ian Romanick <ian.d.romanick at intel.com>

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