[Mesa-dev] [RFT PATCH 2/2] nv20: enable ARB_texture_border_clamp support

[Ilia Mirkin]

On Tue, Jun 27, 2017 at 1:11 PM, Ian Romanick <idr at freedesktop.org> wrote:
> On 06/27/2017 02:59 AM, Timothy Arceri wrote:
>> Just curious. Can this extension be added to NV04 and NV10? As those are
>> the only drivers that don't currently support it.
>>
>> I have cards I could test those with, but don't have an NV20.
>
> I just sent out an updated series that I tested on NV20.  Thanks for
> reminding me. :)
>
> I *think* NV10 can do this, but the implementation would be... painful.
> NV10 (and on) supports texture borders... that extra one pixel of pixels
> on each side that's outside the usual [0,1]x[0,1] sampling range.  I
> believe this extension could be supported by creating every texture with
> a border and filling the border with the GL border color.

That's right, they support the border inside the texture. I think that
was killed in mesa though, and I have no interest in reinstating it :)