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Date:	Tue, 17 Oct 2023 17:14:30 -0700
MIME-Version:	1.0
User-Agent:	Mozilla Thunderbird
Subject:	Re: [geda-user] Xcircuit to Geda
To:	geda-user AT delorie DOT com
References:	<4f7f6c66-7535-4ab8-9adc-105360c58698 AT q40 DOT de>
	<4de9a3c9-3974-4187-bb79-90ad6d8575ea AT ecosensory DOT com>
	<20231017214312 DOT CE3E88622A84 AT turkos DOT aspodata DOT se>
From:	"Girvin Herr (gherrl2 AT fastmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On 10/17/23 14:43, karl AT aspodata DOT se [via geda-user AT delorie DOT com] wrote:
> Griessen:
>> On 10/17/23 02:36, Derek (derek AT q40 DOT de) [via geda-user AT delorie DOT com] wrote:
>>> import the PS file as an image and trace the components and tracks.
>>>
>>> Is there any easier way?
>> Not AFAIK
>> Seems like an automation problem even the current crop of AIs would bog down with.
> Postscript is vector based, and lines arcs etc are done with
> moveto, lineto, arcto etc.
>
>   The xscircuit reference manual doesn't say much:
> https://xcircuit.sourceforge.net/features.html
>
>   but there is a ref. on the file format:
> https://xcircuit.sourceforge.net/postscript.html
>   and it seems symbols are done as functions/macros.
>
> I'd say it wouldn't be impossible to make some kind of
> converter. If it is very important for someone, I might
> be pursuaded into writing one.
>
> Regards,
> /Karl Hammar

Karl et al,

In general, this is true. PostScript and PDF are vector-based formats. 
That is what I thought too. However, in my experience, I discovered that 
PDF files and maybe by association, PostScript files, can have 
bit-mapped images enclosed. My project was to convert a downloaded PDF 
image of a part to DXF for inclusion into a QCAD drawing I was working 
on. Running the file through pstoedit did not produce anything usable, 
because pstoedit will not convert bit-maps. That was when I discovered 
to my surprise the image I wanted from the PDF file was a bit-map. I 
then tried potrace on the file, but it produced a mess - a bunch of tiny 
little vectors, and I felt it would be quicker to redraw the part in 
QCAD than to edit the mess to something usable. So beware.

Girvin Herr

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