GNU bug report logs - #14700
24.3.50; Animated ImageMagick images doesn't work

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Package: emacs;

Reported by: Lars Magne Ingebrigtsen <larsi <at> gnus.org>

Date: Sun, 23 Jun 2013 19:40:02 UTC

Severity: normal

Tags: fixed

Merged with 7978

Found in versions 24.0.50, 24.3.50

Fixed in version 24.4

Done: Lars Magne Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Sun, 23 Jun 2013 19:40:02 GMT) Full text and rfc822 format available.

Acknowledgement sent to Lars Magne Ingebrigtsen <larsi <at> gnus.org>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Sun, 23 Jun 2013 19:40:03 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; Animated ImageMagick images doesn't work
Date: Sun, 23 Jun 2013 21:39:13 +0200

With the current bzr Emacs, the current doesn't display an animated
image:

(url-retrieve "https://i.chzbgr.com/maxW500/7589318912/hB9FE64E7/"
	      (lambda (&rest ignore)
		(search-forward "\n\n")
		(let ((image (create-image
			      (buffer-substring (point) (point-max))
			      'imagemagick t)))
		  (pop-to-buffer "*image*")
		  (erase-buffer)
		  (delete-all-overlays)
		  (put-image image (point) "*")
		  (image-animate image nil 60))))

If you change `imagemagick' to `gif', you get an animated image.

Looking at the code, it looks like the ImageMagick code should possibly
work, but I'm not quite sure.  There's at least stuff in there that
tries to respect the index parameter.



In GNU Emacs 24.3.50.8 (x86_64-unknown-linux-gnu, X toolkit, Xaw scroll bars)
 of 2013-06-23 on stories
Bzr revision: 113145 larsi <at> gnus.org-20130623182930-lbfbp0tsxjke9tss
Windowing system distributor `The X.Org Foundation', version 11.0.11204000
System Description:	Debian GNU/Linux 7.0 (wheezy)

Important settings:
  value of $LANG: en_US
  locale-coding-system: iso-latin-1-unix
  default enable-multibyte-characters: t

Major mode: Group

Minor modes in effect:
  diff-auto-refine-mode: t
  gnus-topic-mode: t
  gnus-undo-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t

Recent input:
C-x b <return> H-o C-a C-k C-k C-M-x C-x C-s <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> C-h f <return> 
C-x i C-g C-x o C-e <left> <left> <left> <left> <left> 
<return> C-x 1 <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> C-e 
<left> <left> <left> <left> <left> <left> <left> C-h 
f <return> C-x o <return> <return> C-x o C-x 1 C-s 
i m a g e - a n i m a t e - t i m e o u t C-s <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <return> ( m e s s a g e SPC 
" % s " SPC n ) C-M-x H-o g H-o H-o H-o H-o H-o H-o 
H-o H-o H-o H-o H-o H-o H-o H-o H-o C-a C-k C-k C-M-x 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> C-s 
s h o w - f r a m C-s C-s <down> <down> <down> <down> 
<down> <down> <down> <down> C-a C-y C-M-x H-o g H-o 
<up> C-k C-k C-M-x C-x C-s C-x b i m a <return> C-x 
b s h <return> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <up> 
H-o H-o <down> <down> <up> <left> <left> <left> <left> 
<left> <left> <left> <left> <right> M-d n i l C-M-x 
H-o g H-o C-_ C-_ C-M-x C-x C-s H-o g g g <down> i 
<switch-frame> <switch-frame> H-o H-o H-o C-x 2 C-x 
o C-x b <return> C-x o <switch-frame> q M-x r e p o 
<tab> r <tab> b <tab> <return>

Recent messages:
35
image-show-frame
Saving file /home/larsi/src/emacs/trunk/lisp/image.el...
Wrote /home/larsi/src/emacs/trunk/lisp/image.el
shr-rescale-image
Undo! [2 times]
shr-rescale-image
(No changes need to be saved)
Browsing https://i.chzbgr.com/maxW500/7589318912/hB9FE64E7/...
Making completion list...

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/home/larsi/mgnus/lisp/mm-view hides /home/larsi/src/emacs/trunk/lisp/gnus/mm-view
/home/larsi/mgnus/lisp/gnus-html hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-html
/home/larsi/mgnus/lisp/gnus-uu hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-uu
/home/larsi/mgnus/lisp/deuglify hides /home/larsi/src/emacs/trunk/lisp/gnus/deuglify
/home/larsi/mgnus/lisp/spam-stat hides /home/larsi/src/emacs/trunk/lisp/gnus/spam-stat
/home/larsi/mgnus/lisp/nndir hides /home/larsi/src/emacs/trunk/lisp/gnus/nndir
/home/larsi/mgnus/lisp/gnus-kill hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-kill
/home/larsi/mgnus/lisp/gnus-ems hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-ems
/home/larsi/mgnus/lisp/gnus-group hides /home/larsi/src/emacs/trunk/lisp/gnus/gnus-group
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/home/larsi/mgnus/lisp/rfc2047 hides /home/larsi/src/emacs/trunk/lisp/gnus/rfc2047
/home/larsi/mgnus/lisp/gmm-utils hides /home/larsi/src/emacs/trunk/lisp/gnus/gmm-utils
/home/larsi/mgnus/lisp/utf7 hides /home/larsi/src/emacs/trunk/lisp/gnus/utf7
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/home/larsi/mgnus/lisp/time-date hides /home/larsi/src/emacs/trunk/lisp/calendar/time-date
/home/larsi/mgnus/lisp/parse-time hides /home/larsi/src/emacs/trunk/lisp/calendar/parse-time

Features:
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gnus-util mm-util mail-prsvr password-cache url-vars mailcap warnings
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image-mode easymenu timezone w3m-hist w3m-fb w3m-ems wid-edit w3m-ccl
ccl w3m-favicon w3m-image w3m-proc w3m-util cl-macs gv add-log mail-extr
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font-lock syntax facemenu font-core frame cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew
greek romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process gfilenotify dynamic-setting
system-font-setting font-render-setting x-toolkit x multi-tty emacs)

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Mon, 24 Jun 2013 00:22:02 GMT) Full text and rfc822 format available.

Message #8 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Sun, 23 Jun 2013 20:21:06 -0400

Lars Magne Ingebrigtsen wrote:

> With the current bzr Emacs, the current doesn't display an animated
> image:
>
> (url-retrieve "https://i.chzbgr.com/maxW500/7589318912/hB9FE64E7/"

I see you like cheeseburgers...

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=7978

see also

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10747

Merged 7978 14700. Request was from Glenn Morris <rgm <at> gnu.org> to control <at> debbugs.gnu.org. (Mon, 24 Jun 2013 00:23:02 GMT) Full text and rfc822 format available.

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Mon, 24 Jun 2013 08:03:01 GMT) Full text and rfc822 format available.

Message #13 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Mon, 24 Jun 2013 10:02:24 +0200

Glenn Morris <rgm <at> gnu.org> writes:

>> (url-retrieve "https://i.chzbgr.com/maxW500/7589318912/hB9FE64E7/"
>
> I see you like cheeseburgers...

The internet is for cats.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Wed, 14 Aug 2013 14:19:02 GMT) Full text and rfc822 format available.

Message #16 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Wed, 14 Aug 2013 16:18:27 +0200

I've checked in a fix that will actually animate ImageMagick images
now.  (It previously computed the index and everything, but didn't
actually use it for anything.)

So the example code in this bug now "works".  But it's really ugly.  It
displays the same bugs as gif animation did before Chong Yidong fixed it
in 2011.  Looking at those fixes, it looks like is has something to do
with...  er...  transparent colours and...  something.

I'm trying to google to see whether anybody has written some code to use
ImageMagick to display animated gifs to see whether there's any way to
make ImageMagick compute all this stuff itself, but so far I've come up
short.

Anybody?

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Wed, 14 Aug 2013 16:15:03 GMT) Full text and rfc822 format available.

Message #19 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Wed, 14 Aug 2013 12:14:09 -0400

Lars Magne Ingebrigtsen wrote:

> ImageMagick to display animated gifs to see whether there's any way to
> make ImageMagick compute all this stuff itself, but so far I've come up
> short.

There's an "animate" command-line program that is part of ImageMagick,
and it seems to do fine on the examples from
http://www.imagemagick.org/Usage/anim_basics/

So maybe the source of that will have clues...

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Thu, 15 Aug 2013 14:00:05 GMT) Full text and rfc822 format available.

Message #22 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Thu, 15 Aug 2013 15:59:10 +0200

Glenn Morris <rgm <at> gnu.org> writes:

> There's an "animate" command-line program that is part of ImageMagick,
> and it seems to do fine on the examples from
> http://www.imagemagick.org/Usage/anim_basics/
>
> So maybe the source of that will have clues...

Thanks.  I've started reading the source code now.  Unfortunately, it's
written in an oldee-stylee C manner, meaning that no function is less
than 1500 lines...  *sigh*

I've looked at Chong's code in gif_load again, though, and I think I
understand what's going on now.  Animated gifs are basically just a
series of normal gifs, but wherever there's a transparent gif, we're
supposed to show the data from the previous gif.  So to display image X,
we have to compute all images from 0 to X and apply the transparencies.

Doing this in imagemagick_load in the same manner shouldn't be too
difficult, I think.  The information is available -- i.e., we just need
to know what the transparent colour is, and then the rest is just
looping and constructing the resulting image.

Reusing the code in gif_load directly doesn't seem like the best option
(it's creating X structures directly, if I interpret it correctly), so I
think I'll have a whack at implementing a imagemagick_compute_scene
function by peeking at Chong's code heavily.

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Thu, 15 Aug 2013 15:12:02 GMT) Full text and rfc822 format available.

Message #25 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Thu, 15 Aug 2013 17:11:38 +0200

Lars Magne Ingebrigtsen <larsi <at> gnus.org> writes:

> Doing this in imagemagick_load in the same manner shouldn't be too
> difficult, I think. 

I've now implemented this and checked in the new function.  It's too
slow to be usable as is, though.  It needs a cached representation of
the previously computed image, but I'm not quite sure where to stash
that...

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Thu, 15 Aug 2013 15:45:01 GMT) Full text and rfc822 format available.

Message #28 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Thu, 15 Aug 2013 17:44:27 +0200

Lars Magne Ingebrigtsen <larsi <at> gnus.org> writes:

> I've now implemented this and checked in the new function.  It's too
> slow to be usable as is, though.  It needs a cached representation of
> the previously computed image, but I'm not quite sure where to stash
> that...

I've confirmed that caching the previously computed data makes this
usable.  But I'm still not sure where to cache things.  Ideally, this
would be a "per-image" cache, so that we can have several animated
images at the same time.  But the way the animation is called, it kinda
creates a new image every time.

Hm.  Perhaps that's where to fix this?  Make the animation function
cache the data in the image structure somehow?

Anybody got other ideas?

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Thu, 15 Aug 2013 16:08:02 GMT) Full text and rfc822 format available.

Message #31 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Thu, 15 Aug 2013 18:07:27 +0200

Lars Magne Ingebrigtsen <larsi <at> gnus.org> writes:

> I've confirmed that caching the previously computed data makes this
> usable.  But I'm still not sure where to cache things.  Ideally, this
> would be a "per-image" cache, so that we can have several animated
> images at the same time.  But the way the animation is called, it kinda
> creates a new image every time.

That's not correct.  It just does

  (plist-put (cdr image) :index n)
  (force-window-update))

So per-image caching should be fine...  I think...  If each Lisp-level
image maps to something on the C-level side.  Hm...  I see that there's
already a cache there, but it caches the displayed representation, and I
need to cache the "raw" MagickWand representation.  (The image may be
scaled etc after computation, so I need the pre-scaled version of the
image.)

Hm...

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Thu, 15 Aug 2013 19:56:02 GMT) Full text and rfc822 format available.

Message #34 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Thu, 15 Aug 2013 21:55:31 +0200

I've now run this stuff over portions of the sizeable collection of
animated cat pictures in gwene.com.feedburner.cheezburger, and I fixed
some problems with some GIFs that may perhaps not be on spec, but should
be interpreted correctly, anyway.

So the only remaining thing now is to write a suitable caching
mechanism, but I'm not going to do that today, at least.

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Fri, 16 Aug 2013 14:59:02 GMT) Full text and rfc822 format available.

Message #37 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Fri, 16 Aug 2013 16:58:21 +0200

I've now implemented a per-image cache, so this should kinda work now.

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

Added tag(s) fixed. Request was from Lars Magne Ingebrigtsen <larsi <at> gnus.org> to control <at> debbugs.gnu.org. (Fri, 16 Aug 2013 14:59:02 GMT) Full text and rfc822 format available.

bug marked as fixed in version 24.4, send any further explanations to 14700 <at> debbugs.gnu.org and Lars Magne Ingebrigtsen <larsi <at> gnus.org> Request was from Lars Magne Ingebrigtsen <larsi <at> gnus.org> to control <at> debbugs.gnu.org. (Fri, 16 Aug 2013 14:59:03 GMT) Full text and rfc822 format available.

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Fri, 16 Aug 2013 17:13:01 GMT) Full text and rfc822 format available.

Message #44 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Fri, 16 Aug 2013 13:12:49 -0400

Thanks for making this work!

If you've gotten somewhat familiar with ImageMagick, maybe you could
look at bug#10747, though it is not at all important.

Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#14700; Package emacs. (Sat, 17 Aug 2013 14:49:02 GMT) Full text and rfc822 format available.

Message #47 received at 14700 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 14700 <at> debbugs.gnu.org
Subject: Re: bug#14700: 24.3.50; Animated ImageMagick images doesn't work
Date: Sat, 17 Aug 2013 16:48:26 +0200

Glenn Morris <rgm <at> gnu.org> writes:

> If you've gotten somewhat familiar with ImageMagick, maybe you could
> look at bug#10747, though it is not at all important.

I'm thinking about taking another break from Emacs work (unless I broke
something major with the latest round of patches >"?), so I'm probably
not going to tackle that bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
  No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
  and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html

bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Sun, 15 Sep 2013 11:24:03 GMT) Full text and rfc822 format available.

This bug report was last modified 10 years and 230 days ago.

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GNU bug report logs - #14700 24.3.50; Animated ImageMagick images doesn't work

GNU bug report logs - #14700
24.3.50; Animated ImageMagick images doesn't work