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Bug#278320: marked as forwarded (autotrace: background-color can't handl

Subject: Bug#278320: marked as forwarded autotrace: background-color can't handle transparency
From: Debian Bug Tracking System
Date: Wed, 29 Dec 2004 00:03:05 -0800
Your message dated Wed, 29 Dec 2004 07:50:55 +0000
with message-id <[email protected]>
has caused the Debian Bug report #278320,
regarding autotrace: background-color can't handle transparency
to be marked as having been forwarded to the upstream software
author(s) Martin Weber <[email protected]>.

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Date: Wed, 29 Dec 2004 07:50:55 +0000
From: Henning Makholm <[email protected]>
To: Martin Weber <[email protected]>
Cc: Jason Dorje Short <[email protected]>,
        [email protected], [email protected]
Subject: Re: Bug#278320: autotrace: background-color can't handle transparency
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package: autotrace
severity 278320 wishlist
tags 278320 upstream

Hi Martin,

I have received the following feature request through Debian's bug
tracking system.  I'm not quite sure myself whether it is, in
isolation, worth the trouble to add transparency support: It would be
most useful for multi-colored images, and there autotrace's results
are usually more amusing than pretty anyway, with bits of background
showing between neighbouring areas of different colors.

However, I thought I'd be a good boy and pass the suggestion upwards
to you; then you know that at least one user would find such a feature

Jason Dorje Short writes:

> autotrace has a -background-color <color> parameter to control which 
> color is used as transparent.  However by default there is no background 
> color, and there is no way to specify "transparent" as the background 
> color.  So to get transparency in the image you have to do some magick 
> to convert the transparent color into a different, unused color, then 
> use -transparent-background <color> on this color.
> If there is some way to use transparency, then it's not very well 
> documented.  The help for -background-color says only RGB values may be 
> used.
> I suggest that the default background color be transparent.  And also 
> that the <color> parameter may be any color string supported by 
> SVG/imagemagick.

Henning Makholm                     "However, the fact that the utterance by
                           Epimenides of that false sentence could imply the
           existence of some Cretan who is not a liar is rather unsettling."

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