https://bugs.freedesktop.org/show_bug.cgi?id=79223
--- Comment #2 from Pierre Ossman <pierre-bugzilla at ossman.eu> --- Ok, so it is glReadPixels() that is waiting for vsync. I added some measurements around that call and it is definitely where the delay happens. For good measure I removed the mapping (step 2) and the extra render (step 4). So it does seem that glReadPixels() is simply broken and isn't doing the nice asynchronous read is it supposed to. Oddly enough I could not reproduce the problem with a simple test program. So there is something else required to provoke the issue. Ideas? -- You are receiving this mail because: You are the assignee for the bug. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20140525/6260310a/attachment.html>
