address@hidden: problem with transparent PNG image display]

[Richard Stallman]

Would someone please DTRT and ack?

------- Start of forwarded message -------
Date: Wed, 10 Jan 2007 01:49:59 +0100
From: Chris Moore <address@hidden>
To: address@hidden
Subject: problem with transparent PNG image display
X-Spam-Status: No, score=0.0 required=5.0 tests=RCVD_BY_IP autolearn=failed 
        version=3.0.4

Download this image and open it in Emacs:

  http://tango-project.org/static/cvs/tango-art-tools/palettes/Tango-Palette.png

The image has lots of transparent pixels.  Using M-x
set-background-colour RET and you'll see the background of the image
changes with the background.

Now use 'convert' from ImageMagick to make a copy of the image:

  $ convert Tango-Palette.png Tango-Palette-copy.png

Open the new copy in Emacs and the transparent pixels show up as white
pixels.  Open the copy in The GIMP or gqview and you can see that the
background really is still transparent.

I'm using this version of convert:

  Version: ImageMagick 6.2.4 12/13/06 Q16 http://www.imagemagick.org
  Copyright: Copyright (C) 1999-2005 ImageMagick Studio LLC


In GNU Emacs 22.0.92.40 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
 of 2007-01-09 on trpaslik
X server distributor `The X.Org Foundation', version 11.0.70101000
configured using `configure  '--with-gtk' '--prefix' '/usr/local' '--with-xpm' 
'--with-jpeg' '--with-png' '--with-gif''


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