[Mesa-dev] Fwd: [Mesa-users] Issues with removal of classic OSMesa

[Dave Airlie]

On Thu, 7 Jan 2021 at 21:11, Andreas Fänger <a.faenger at e-sign.com> wrote:
>
> >> don’t know why the current softpipe/swrast implementation shouldn’t be conformant.
>
> >Interesting I hadn't known we had a correct impl in mesa, the features.txt has said "softpipe and llvmpipe advertise 16x anisotropy but simply ignore the setting"
> >so I never dug any deeper. I'll consider a port of this to llvmpipe at some point, making it efficient might be tricky.
>
> It seems that features.txt hasn't been updated regarding this functionality; softpipe has "real" anisotropy since 2011.
>
> > I'll consider a port of this to llvmpipe at some point, making it efficient might be tricky.
> That would be great. As anisotropic filtering is often an option which can be set by a user, I guess most people turn it off to get higher framerates. But in our use case, high quality renderings are required, so we accept the longer render times to get the best quality; hopefully a llvmpipe port would be faster than the old swrast implementation (we are only using the fixed rendering pipeline/no shaders in conjunction with the OpenMP patch for speeding up GL_POLYGON_SMOOTH_HINT)
>
> Andreas

https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8804

Is my first pass at writing the code for this I've no idea if this is
anyway correct, but I'm just letting everyone know I've started
working on it, and mipmap_tunnel doesn't look immediately wrong.

Dave.