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

[Alexandre Demers]

Then you can count me as working on ARB_viewport_array.

Alexandre Demers

On 2015-02-25 14:25, Marek Olšák wrote:
> 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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