On Mon, Feb 24, 2014 at 5:03 PM, Ilia Mirkin <imir...@alum.mit.edu> wrote: > On Mon, Feb 24, 2014 at 3:38 AM, Dave Airlie <airl...@gmail.com> wrote: >> I've taken a quick look at ARB_texture_query_levels, >> >> and the HW generally seems to implement this by returning it in the W >> channel of RESINFO, which would map to the TXQ instruction, >> >> So my initial implementation added a LEVQ TGSI instruction but I do >> think this isn't representative of the hw and I should add it to TXQ >> with maybe a CAP to say it supports levels. > > Is there even hw that supports TXQ but doesn't return the levels info > in W? A quick grep suggests that llvmpipe, ilo, nv50+, r600+ support > TXQ. I assume that llvmpipe shouldn't be an issue, nv50+ has it, and I > believe you've indicated that r600+ has it. So the question is whether > ilo can do it or not... looking at the i965 code, it seems like ir_txs > and ir_query_levels are handled with the same shader opcode. And > there's a comment "/* # levels is in .w */"... Yes, GENs supported by ilo have it in W of RESINFO.
> > -ilia > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/mesa-dev -- o...@lunarg.com _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
