bug#2560: 23.0.91; Emacs silently fails to display some pictures

bug#2560: 23.0.91; Emacs silently fails to display some pictures

[Markus Triska]

With p.png from:

   http://www.logic.at/prolog/p.png

when I do:

   $ emacs -Q p.png

then Emacs enters image mode, but instead of the actual picture I only
see a small black rectangle. If Emacs cannot handle a picture, I find
an error message and reason for failure preferable in this case. Best
of all would be to make it handle this picture correctly, if possible.

In GNU Emacs 23.0.91.3 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2009-03-03 on mt-computer.local
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

bug#2560: 23.0.91; Emacs silently fails to display some pictures

[Juanma Barranquero]

On Tue, Mar 3, 2009 at 17:47, Markus Triska <markus.triska@gmx.at> wrote:

> then Emacs enters image mode, but instead of the actual picture I only
> see a small black rectangle. If Emacs cannot handle a picture, I find
> an error message and reason for failure preferable in this case. Best
> of all would be to make it handle this picture correctly, if possible.

Perhaps you can determine why it is not working in your case. Emacs on
Windows has no trouble at all displaying that image using libpng12
(libpgn 1.2.33).

    Juanma

bug#2560: marked as done (23.0.91; Emacs silently fails to display some pictures)

[Emacs bug Tracking System]

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Your message dated Wed, 04 Mar 2009 21:01:44 +0800
with message-id <49AE7BB8.3090802@gnu.org>
and subject line Re: bug#2560: 23.0.91; Emacs silently fails to display some pictures
has caused the Emacs bug report #2560,
regarding 23.0.91; Emacs silently fails to display some pictures
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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immediately.)


-- 
2560: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=2560
Emacs Bug Tracking System
Contact owner@emacsbugs.donarmstrong.com with problems

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From: Markus Triska <markus.triska@gmx.at>
To: emacs-pretest-bug@gnu.org
Subject: 23.0.91; Emacs silently fails to display some pictures
Date: Tue,  3 Mar 2009 17:47:39 +0100 (CET)
Message-ID: <20090303164739.5B4E5C67625@mt-computer.local>


With p.png from:

   http://www.logic.at/prolog/p.png

when I do:

   $ emacs -Q p.png

then Emacs enters image mode, but instead of the actual picture I only
see a small black rectangle. If Emacs cannot handle a picture, I find
an error message and reason for failure preferable in this case. Best
of all would be to make it handle this picture correctly, if possible.

In GNU Emacs 23.0.91.3 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2009-03-03 on mt-computer.local
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t



[-- Attachment #3: Type: message/rfc822, Size: 3427 bytes --]

From: Jason Rumney <jasonr@gnu.org>
To: Juanma Barranquero <lekktu@gmail.com>, 2560-done@emacsbugs.donarmstrong.com
Cc: Markus Triska <markus.triska@gmx.at>
Subject: Re: bug#2560: 23.0.91; Emacs silently fails to display some pictures
Date: Wed, 04 Mar 2009 21:01:44 +0800
Message-ID: <49AE7BB8.3090802@gnu.org>

Juanma Barranquero wrote:
> Perhaps you can determine why it is not working in your case. Emacs on
> Windows has no trouble at all displaying that image using libpng12
> (libpgn 1.2.33).
>   

Perhaps you are using a larger frame than me, but that image is larger 
than max-image-size allows for by default (6.0 * frame height/width) on 
my system, and I presume the OP's as well.

I've just made some changes to print an error message in this case for 
PNG, XBM and SVG images, and improved the message for other formats to 
make it obvious that max-image-size can affect loading in this way.

bug#2560: 23.0.91; Emacs silently fails to display some pictures

[Juanma Barranquero]

On Wed, Mar 4, 2009 at 14:01, Jason Rumney <jasonr@gnu.org> wrote:

> Perhaps you are using a larger frame than me, but that image is larger than
> max-image-size allows for by default (6.0 * frame height/width) on my
> system, and I presume the OP's as well.

Hum. I thought of it, but as the image is not large anyway I didn't
check. Sorry for the noise.

    Juanma