[Mesa-dev] State of Geometry shader instancing on radeonsi

[Marek Olšák]

Nobody is working on ARB_gpu_shader5 for radeonsi.

Marek



On Wed, Feb 25, 2015 at 6:41 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> On Wed, Feb 25, 2015 at 11:24 AM, Alexandre Demers
> <alexandre.f.demers at gmail.com> wrote:
>> Hi everyone,
>>
>> I'd like to know if someone is working on Geometry shader instancing
>> for radeonsi or if there is already a work in progress somewhere I
>> would have missed. I might be interested in giving it a try and then
>> on GL_ARB_viewport_array.
>
> While there's no harm in working on GS instancing on its own, note
> that it's only a small part of the ARB_gpu_shader5 extension, so won't
> be immediately useful until the other pieces are completed (which will
> mostly involve adding LLVM support for the ops in question if they're
> not there yet, and then wiring them up).
>
> ARB_viewport_array is a much more self-contained extension. Note that
> ARB_fragment_layer_viewport will automatically get enabled once you
> claim multiple viewports, so make sure to make gl_ViewportIndex work
> in fp as well if you decide to do it. You may have to pass it as a
> varying "by hand", not sure... IIRC I had to do that in r600. There
> are piglits that cover the various cases.
>
> [Hopefully Marek and/or some of the other AMD guys will pipe up if
> they've worked on any of these things and just haven't published yet.]
>
>   -ilia
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