[Mesa-dev] [PATCH v2 0/9] radeonsi, radv: fix cube map coordinate derivatives

[Marek Olšák]

On Thu, Jan 12, 2017 at 4:39 PM, Nicolai Hähnle <nhaehnle at gmail.com> wrote:
> Hi all,
>
> once more without the change to the offset, and with a small fix on
> patch #5: while munging radv and radeonsi versions of prepare_cube_coords
> together, I accidentally went back to touching all four coordinates.
> This is fixed now.
>
> With Bas' testing on radv and more thorough piglit/cts testing on
> radeonsi, this looks correct now. I admit I still don't understand
> understand the 0.5 vs. 1.5 offset issue, but (a) we now stick to the
> magic 1.5 that was used before, (b) the tests look good, and (c) I'd
> like to land this for 17.0, so...

I think I've seen 1.5 somewhere in internal docs.

Marek