From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 79223] extra vsync when reading back pixels in xbmc
Date: Sun, 25 May 2014 20:20:36 +0000 [thread overview]
Message-ID: <bug-79223-502-qvXb9sIXjR@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-79223-502@http.bugs.freedesktop.org/>
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https://bugs.freedesktop.org/show_bug.cgi?id=79223
--- Comment #2 from Pierre Ossman <pierre-bugzilla@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?
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next prev parent reply other threads:[~2014-05-25 20:20 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-25 19:10 [Bug 79223] New: extra vsync when reading back pixels in xbmc bugzilla-daemon
2014-05-25 19:10 ` [Bug 79223] " bugzilla-daemon
2014-05-25 20:20 ` bugzilla-daemon [this message]
2014-05-28 3:09 ` bugzilla-daemon
2014-05-28 5:46 ` bugzilla-daemon
2014-05-28 7:03 ` bugzilla-daemon
2014-05-30 13:15 ` bugzilla-daemon
2014-05-30 13:21 ` bugzilla-daemon
2014-05-30 13:35 ` bugzilla-daemon
2014-05-30 13:47 ` bugzilla-daemon
2014-05-30 20:04 ` bugzilla-daemon
2014-05-30 21:23 ` bugzilla-daemon
2014-06-01 18:21 ` bugzilla-daemon
2014-06-02 7:07 ` bugzilla-daemon
2014-06-02 15:48 ` bugzilla-daemon
2014-06-02 19:24 ` bugzilla-daemon
2014-06-02 19:26 ` bugzilla-daemon
2014-06-03 6:34 ` bugzilla-daemon
2014-06-03 15:07 ` bugzilla-daemon
2019-11-19 8:49 ` bugzilla-daemon
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