On Thu, Mar 23, 2017 at 2:57 PM, Ilia Mirkin <imir...@alum.mit.edu> wrote: > On Thu, Mar 23, 2017 at 2:45 PM, Lyude Paul <ly...@redhat.com> wrote: >> On Thu, 2017-03-23 at 14:22 -0400, Alex Deucher wrote: >>> On Thu, Mar 23, 2017 at 2:18 PM, Marek Olšák <mar...@gmail.com> >>> wrote: >>> > Is there any user of this extension? >>> >>> Based on the spec, it seems like it would be useful for glamor. No >>> idea is anyone has code to use it yet. >> Actually me, robclark and airlied were talking specifically about using >> this for glamor and trying to implement it on other platforms using >> rectangular primitives. No idea if that'll work (especially since I'm >> new here), but it sounds promising enough to try :). >> >> Once I get this patch series upstream I'll probably look into writing >> an implementation for softpipe and some other drivers > > Seems like there are a bunch of ways of achieving the same thing, > namely a rectangle being drawn: > - new rectangle primitive
Didn't Marek send out an RFC for a rectangle interface, at least in gallium at some point recently? Alex > - NV_fill_rectangle > - EXT_window_rectangles or scissors + overdrawn triangle > > The latter only works for a single rectangle, but I doubt it's too > useful to have multiple ones drawn anyways. > > I've already implemented EXT_window_rectangles on nouveau, and my > understanding is that it should be easy on SI+. This support goes back > to nv50, and with minor modifications to the ext, could go as far back > as nv30, if not earlier. (As-is it requires something semi-silly which > prevents implementation there.) > > NV_fill_rectangle functionality is only available on GM200+, which are > quite recent GPUs (GTX 950+). I'm not aware of a way to do rectangle > primitives on NVIDIA GPUs (i.e. specifying them as 3 points) without > NV_fill_rectangle functionality. All NVIDIA GPUs do support QUADS, but > I'm not sure if they're rasterized in one go or two. > > None of this is for or against any particular approach, merely > providing some information. > > Cheers, > > -ilia _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
