----- Original Message ----- > Am 11.07.2013 15:50, schrieb Jose Fonseca: > > > > > > ----- Original Message ----- > >> From: Roland Scheidegger <[email protected]> > >> > >> srgb-to-linear is using 3rd degree polynomial for now which should be > >> _just_ > >> good enough. Reverse is using some rational polynomials and is quite > >> accurate, > >> though not hooked into llvmpipe's blend code yet and hence unused > >> (untested). > >> Using a table might also be an option (for srgb-to-linear especially). > >> This does not enable any new features yet because EXT_texture_srgb was > >> already > >> supported via util_format fallbacks, but performance was lacking probably > >> due > >> to the external function call (the table used by the util_format_srgb code > >> may > >> not be all that much slower on its own). > >> Some performance figures (taken from modified gloss, replaced both base > >> and > >> sphere texture to use GL_SRGB instead of GL_RGB, measured on 1Ghz Sandy > >> Bridge, > >> the numbers aren't terribly accurate): > >> > >> normal gloss, aos, 8-wide: 47 fps > >> normal gloss, aos, 4-wide: 48 fps > >> > >> normal gloss, forced to soa, 8-wide: 48 fps > >> normal gloss, forced to soa, 4-wide: 47 fps > >> > >> patched gloss, old code, soa, 8-wide: 21 fps > >> patched gloss, old code, soa, 4-wide: 24 fps > >> > >> patched gloss, new code, soa, 8-wide: 41 fps > >> patched gloss, new code, soa, 4-wide: 38 fps > > > > Indeed, not a big difference. Though these figures seem low overall -- I > > get 72.5275 on my machine. This was with release/profile build, right? > Yes with release build - I get less than half that with debug build. You > got 72.5 on a 1Ghz Sandy Bridge using 1 thread? I was also using llvm 3.1. > > > > > Eitherway the patch looks good. > Actually it does not I forgot to include the actual conversion code. > I'll send out another version :-(.
That's embarrassing! How did I miss that. Jose _______________________________________________ mesa-dev mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-dev
