Well that's a dodgy application on my part.. it now works sync'd with it ..
How should I do this without changing the kernel i810 module? is there an way from the OpenGL level to do this that I could propogate down? Dave. Dave Airlie said: > > Nice one, that gets rid of my tearing - thanks Matthew, > > it works except now I get some jumpiness on my screen when a new texture > is coming on, I've got 5 rotating reels of 4 textured quads and when the > new ones are about to come on the top of the reel it seems to jump a > bit... > > Not sure if the fullscreen would help here.. I need to time each render > and see if this one takes a lot longer than the others.. > > Dave. > > Sottek, Matthew J said: >> >> The easiest way to get rid of tearing is to make the ring buffer wait >> before the back->front blit. This is a very simple mechanism that will >> work even for windowed 3d, and if you are running just one 3d client >> the wait time should not alter your performance much. Or rather, >> the performance decrease should not be different than any other >> "correct" rendering. >> >> Just add a GFXCMDPARSER_LOAD_SCAN_LINES_INCL and a >> GFXCMDPARSER_WAIT_FOR_EVENT prior to the blit. This will hold the blit >> as long as it would tear on the screen. Small windows will not have to >> wait for a vblank, they only wait while the current scan >> intersects the blit. >> >> If you don't want to do that, you can just use the wait for event to >> block until the vblank as I mentioned before. >> >> This will make the rendering at least correct, you can then work on >> the page flipping as an optimization for full screen. >> >> -Matt >> >> >> >> -----Original Message----- >> From: Dave Airlie [mailto:[EMAIL PROTECTED]] >> Sent: Monday, December 16, 2002 6:57 PM >> To: [EMAIL PROTECTED] >> Cc: [EMAIL PROTECTED] >> Subject: Re: [Dri-devel] [PATCH] i810 cleanup >> >> >> >> Well the i830 page flip code is using async flips, the main thing I >> want to use page flipping for on my i815 is sync'ed flips so I don't >> see the tearing that is so really obvious and gives people headaches.. >> (don't need to be getting sued here!!). >> >> It's not the timing I'm worried about it's the tearing, it can be slow >> as long as its not really ugly... >> >> the i815 can't do async page flipping properly anyways there is a bug >> in the silicon I would assume they fixed it for the i830 ... >> >> Also my current application is a single 3D window taking up the full >> screen, I doubt I'll ever any 2d windows interfering which is handy >> for me... >> >> My major issue now is finding a CVS tree which works for me on my >> development platform that I can then add code to. >> >> As my patch doesn't affect anything other than cleanup can you check >> it in? >> >> Dave. >> >>> The 830 page flipping code is turned off for some good reasons: >>> - I haven't seen it work without really visible corruption on the >> flip >>> - >>> typically flashing and blank areas >>> >>> - It isn't actually all that fast - there is a delay while >> (presumably) >>> the >>> ramdac cache or fifo drains - this is comparable to the time to blit >>> the >>> window itself. The crossover point was about 300x300 on my test >>> box, >>> but would vary for different machines. >>> >>> - Because of the above, it is necessary to wait for the flip to >> finish >>> before >>> clearing the backbuffer & starting the next frame, otherwise you see >>> this happen. Actually this invalidates my explanation of the delay >>> -- the fact that you can see the clear implies that the ramdac is >>> still grabbing new values from the frontbuffer, so I don't really >>> know what the delay arises from. >>> >>> Keith >> >> >> -- >> David Airlie, Software Engineer >> http://www.skynet.ie/~airlied / [EMAIL PROTECTED] >> pam_smb / Linux DecStation / Linux VAX / ILUG person >> >> >> >> >> >> ------------------------------------------------------- >> This sf.net email is sponsored by: >> With Great Power, Comes Great Responsibility >> Learn to use your power at OSDN's High Performance Computing Channel >> http://hpc.devchannel.org/ >> _______________________________________________ >> Dri-devel mailing list >> [EMAIL PROTECTED] >> https://lists.sourceforge.net/lists/listinfo/dri-devel > > > -- > David Airlie, Software Engineer > http://www.skynet.ie/~airlied / [EMAIL PROTECTED] > pam_smb / Linux DecStation / Linux VAX / ILUG person > > > > > > ------------------------------------------------------- > This sf.net email is sponsored by: > With Great Power, Comes Great Responsibility > Learn to use your power at OSDN's High Performance Computing Channel > http://hpc.devchannel.org/ > _______________________________________________ > Dri-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/dri-devel -- David Airlie, Software Engineer http://www.skynet.ie/~airlied / [EMAIL PROTECTED] pam_smb / Linux DecStation / Linux VAX / ILUG person ------------------------------------------------------- This sf.net email is sponsored by: With Great Power, Comes Great Responsibility Learn to use your power at OSDN's High Performance Computing Channel http://hpc.devchannel.org/ _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
