[Nouveau] [RFC PATCH 00/11] Implement ARB_cull_distance

[Tobias Klausmann]

On 25.05.2015 07:17, Dave Airlie wrote:
> On 25 May 2015 at 08:11, Marek Olšák <maraeo at gmail.com> wrote:
>> It's the same on Radeon. There are 2x ClipOrCullDistance output
>> vectors and a mask saying it should clip or cull or do nothing.
>>
>> Marek
>>
> My thinking was gallium should have a single semantic and a mask in
> the shader definition maybe.
>
> though it doesn't solve the does nvidia do the right thing with
> cull[0] and clip[0], and what is the right thing.
>
> Dave.

I'm still convinced that both clip[0] and cull[0] should be possible. 
Plus i have written a shader_test for this a while ago which you pushed 
to piglit (fs-cull-and-clip-distance-different.shader_test). If i 
remember right nvidia passed that test just fine.