From: Chong Yidong <cyd@stupidchicken.com>
To: Lars Magne Ingebrigtsen <larsi@gnus.org>
Cc: 7799@debbugs.gnu.org
Subject: bug#7799: 24.0.50; Animated images display strangely
Date: Sun, 14 Aug 2011 15:21:19 -0400 [thread overview]
Message-ID: <87aabbg5ow.fsf@stupidchicken.com> (raw)
In-Reply-To: <m38vr2a1qm.fsf@stories.gnus.org> (Lars Magne Ingebrigtsen's message of "Tue, 09 Aug 2011 20:17:21 +0200")
Lars Magne Ingebrigtsen <larsi@gnus.org> writes:
> It's much better than it used to be, but I'm still seeing some glitches.
>
> http://icanhascheezburger.files.wordpress.com/2011/08/0848b876-a808-4614-ac26-9285d46cc5f7.gif
>
> One single frame in the animation looks broken. That seems to be the
> case with all my test cases where the image displays buggily. (But
> most animated gifs display properly now.) Could it be a off-by-one
> error of some kind?
Looks like there is off-spec behavior going on---not that the gif89a is
very descriptive in the first place. The "buggy" frame is one which has
disposal method 2, defined in the gif89a spec as
2 - Restore to background color. The area used by the
graphic must be restored to the background color.
And that's exactly what Emacs does, but it looks like web browsers are
rendering the background frame instead, under some circumstances. I'll
take a look when I have the time.
prev parent reply other threads:[~2011-08-14 19:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 5:04 bug#7799: 24.0.50; Animated images display strangely Lars Magne Ingebrigtsen
2011-08-08 18:24 ` Chong Yidong
2011-08-09 18:17 ` Lars Magne Ingebrigtsen
2011-08-09 23:11 ` Andy Moreton
2011-08-14 19:21 ` Chong Yidong [this message]
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