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Re: problem with transparent PNG image display

From: Leo
Subject: Re: problem with transparent PNG image display
Date: Wed, 10 Jan 2007 20:18:48 +0000
User-agent: No Gnus v0.6, Emacs/ (2007-01-10), Fedora 6 gnu/linux

* Chris Moore (2007-01-10 01:49 +0100) said:
> 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 (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''

I actually have noticed this a long time ago using Gnus' Face/X-Face
feature. All transparent parts become black.

Leo <sdl.web AT gmail.com>                         (GPG Key: 9283AA3F)

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