GNU bug report logs - #18839
24.4; posn-object-width-height returns (0 . 0) for large images

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#18839: closed (24.4; posn-object-width-height returns (0 . 0)
 for large images)
Date: Sun, 26 Oct 2014 15:45:01 +0000

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Your message dated Sun, 26 Oct 2014 17:44:02 +0200
with message-id <83ppde4z0d.fsf <at> gnu.org>
and subject line Re: bug#18839: 24.4; posn-object-width-height returns (0 . 0) for large images
has caused the debbugs.gnu.org bug report #18839,
regarding 24.4; posn-object-width-height returns (0 . 0) for large images
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
18839: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18839
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: "Roland Winkler" <winkler <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.4; posn-object-width-height returns (0 . 0) for large images
Date: Sat, 25 Oct 2014 21:29:50 -0500

cat > foo.el <<EOF
(global-set-key [C-down-mouse-1] 'foo)
(global-set-key [C-mouse-1] 'foo)
(defun foo (event)
  (interactive "e")
  (message "foo: %s" (posn-object-width-height (event-start event))))
EOF

emacs -q --no-site-file -l foo.el

load some image (say jpg, png, or tif) in image-mode,
the image needs to be large enough for the bug to occur, say 1024x768

Put mouse pointer over image.
Press C-mouse-1

emacs 24.3.93: command foo gives width and height of the image
emacs 24.4: command foo gives (0 . 0)

Strange enough: starting emacs 24.4 via

emacs -q --no-site-file --no-splash -l ~/emacs/dot/foo.el

works as expected




In GNU Emacs 24.4.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.2)
 of 2014-10-22 on regnitz
Windowing system distributor `The X.Org Foundation', version 11.0.11103000
System Description:	Ubuntu 12.04.5 LTS

Important settings:
  value of $LC_COLLATE: C
  value of $LANG: en_US.ISO-8859-15
  locale-coding-system: iso-latin-9-unix

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Roland Winkler <winkler <at> gnu.org>
Cc: 18839-done <at> debbugs.gnu.org
Subject: Re: bug#18839: 24.4;
 posn-object-width-height returns (0 . 0) for large images
Date: Sun, 26 Oct 2014 17:44:02 +0200

> Date: Sat, 25 Oct 2014 23:15:15 -0500
> From: "Roland Winkler" <winkler <at> gnu.org>
> Cc: 18839 <at> debbugs.gnu.org
> 
> On Sun Oct 26 2014 Eli Zaretskii wrote:
> > Please post the URLs where one can find the images you tried, or
> > images that can be used to reproduce this problem.
> 
> Say, I observe the buggy behavior if I enlarge the file splash.png
> in the etc directory of emacs:
> 
> convert splash.png -resize 1024 splash-1024.png
> convert splash.png -resize 2048 splash-2048.png
> 
> In this case for emacs 24.4
> 
> emacs -q --no-splash -l foo.el splash-1024.png  # fine
> emacs -q             -l foo.el splash-1024.png  # buggy
> emacs -q --no-splash -l foo.el splash-2048.png  # buggy
> emacs -q             -l foo.el splash-2048.png  # buggy
> 
> No problem with emacs 24.3.93

An embarrassing typo that caused this is now fixed on the emacs-24
branch.

Thanks.

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