On Fri, 30 Oct 2009 11:42:06 -0700 Eric Anholt <[email protected]> wrote:
> On Fri, 2009-10-30 at 10:59 -0700, Jesse Barnes wrote: > > I've put up some trees (after learning my lesson about working in > > the main tree) with the latest DRI2 sync/swap bits: > > git://git.freedesktop.org/home/jbarnes/xserver master branch > > git://git.freedesktop.org/home/jbarnes/mesa master branch > > > > They includes support for some new DRI2 requests (proto for which > > is in the dri2-swapbuffers branch of dri2proto), including: > > DRI2SwapBuffers > > DRI2GetMSC > > DRI2WaitMSC > > and > > DRI2WaitSBC > > > > These allow us to support GLX extensions like SGI_video_sync, > > OML_swap_control and SGI_swap_interval. > > > > There have been a few comments about the protocol so far: > > 1) DRI2SwapBuffers > > a) Concern about doing another round trip to fetch new buffers > > following the swap. > > I think this is a valid concern, we could potentially > > respond from the swap with the new buffers, but this would make some > > memory saving optimizations more difficult (e.g. freeing > > buffers if no drawing comes in for a short time after the > > swap). > > You're doing one round-trip anyway, and if users are concerned about > the second one, go use XCB already. (We need to go fix Mesa to do > that). Yeah, I don't think it's a huge deal, but every context switch we add is that much more overhead (especially for low end platforms). -- Jesse Barnes, Intel Open Source Technology Center ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference -- _______________________________________________ Dri-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dri-devel
