On Mon, Jul 20, 2015 at 3:53 PM, Brian Paul <bri...@vmware.com> wrote: > On 07/20/2015 01:19 PM, Ilia Mirkin wrote: > >> On Mon, Jul 20, 2015 at 2:44 PM, Ilia Mirkin <imir...@alum.mit.edu> wrote: >>> >>> Hi Brian, >>> >>> You marked off ARB_copy_image (and ARB_clear_texture) as in-progress >>> by VMware some months ago -- has there been any movement on that? It >>> appears that Bioshock Infinite requires ARB_copy_image so might be >>> nice to get that added in. >>> >>> The complication in implementing ARB_copy_image was that st/mesa will >>> pick potentially different PIPE_FORMAT enums for the same internal >>> format, depending on the parameters to the glTexImage call. A >>> developer (irc handle Leftmost, I forget his real name, sorry) tried >>> to wrestle with the issues this presents, but as I recall ended up >>> coming up short. >>> >>> The final implementation probably needs some combination of >>> resource_copy_region and blit. I think resource_copy_region currently >>> is spec'd to require identical formats in src and dst, but that could >>> be relaxed. >>> >>> Anyways, would be interested in hearing whether you guys have made any >>> progress, or if you had thoughts on proper implementation. >>> >>> Cheers, >>> >>> -ilia >> >> >> As an aside, here's a very naive implementation of the ext, which >> fails for lots of reasons not the least of which is that we default to >> BGRA instead of RGBA. Perhaps we could create a resource_copy_region >> version that also takes (or knows about) swizzles... that should also >> cover many (all?) of the situations I think. > > > One of our interns did the implementation (with some contributions from me). > I need to do a lot of clean-up before posting the patches here though. I > was hoping to do that in the next month or two. If you need it sooner, I'll > can see what I can do.
As there's a decent chance that tessellation and subroutine support will land in the next release (thus exposing GL 4.1 in several drivers), and there is an actual released game that requires ARB_copy_image, it would definitely be nice to see support land before the next mesa release is branched off, which should happen in about a month's time I guess. Cheers, -ilia _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
