Can ghostcript be used as a simple UNIX filter?

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2 total messages Started by Bo Thide' Sun, 22 Nov 1992 15:32

#546

Author: Bo Thide'
Date: Sun, 22 Nov 1992 15:32

29 lines
1756 bytes

I have tried to use ghostscript 2.5.2 as a simple UNIX filter for translating
pictures from PostScript to a supported output language (PCL, pbm, ...).
Despite numerous attempts with various combinations of the flags -q,
-sDEVICE, -dNOPAUSE, and -sOUTPUTFILE, I have failed miserably.

What I want is:

(1)  To be able to send processed output directy to stdout.

(2)  Avoid getting caught inside ghostscript (I don't want to
     see the 'GS>' prompt, ever).

Surely this must be possible or is there a serious design flaw in ghosctript?

The closest I have got is
gs -q -sDEVICE=ljet3 -r300 -dNOPAUSE -sOUTPUTFILE='|lp -or'
but it does not give either (1) or (2) above since it prints to |lp -or
and not to stdout and I still have to type 'quit" at a 'GS>' prompt.  This
is unacceptable in my application where I just want to filter PS data.

Any help much appreciated.  Please e-mail.

Bo
-- 
   ^   Bo Thide'----------------------------------------------Science Director
  |I|        Swedish Institute of Space Physics, S-755 91 Uppsala, Sweden
  |R|    Phone: (+46) 18-303671.  Fax: (+46) 18-403100.  IP: 130.238.30.23
 /|F|\          INTERNET: bt@irfu.se      UUCP: ...!mcvax!sunic!irfu!bt  
 ~~U~~ ----------------------------------------------------------------sm5dfw-

Re: Can ghostcript be used as a simple UNIX filter?

#547

Author: Matti Aarnio
Date: Mon, 23 Nov 1992 11:32

34 lines
1939 bytes

bt@irfu.SE (Bo Thide') writes:
>
>I have tried to use ghostscript 2.5.2 as a simple UNIX filter for translating
>pictures from PostScript to a supported output language (PCL, pbm, ...).
>Despite numerous attempts with various combinations of the flags -q,
>-sDEVICE, -dNOPAUSE, and -sOUTPUTFILE, I have failed miserably.
>
>What I want is:
>(1)  To be able to send processed output directy to stdout.
>(2)  Avoid getting caught inside ghostscript (I don't want to
>     see the 'GS>' prompt, ever).
>
>Surely this must be possible or is there a serious design flaw in ghosctript?

  It is, I have done it.  (Altough it feels a bit cludgy, if I may say so.)

>The closest I have got is
>gs -q -sDEVICE=ljet3 -r300 -dNOPAUSE -sOUTPUTFILE='|lp -or'

cat inpfile | gs -q -dNOPAUSE -sDEVICE=ljet3 -r300 -sOutputFile=- - > output.ljet3 

  There is much usefull information at the "gs -h" -output. Including "-" as
file names...

>Any help much appreciated.  Please e-mail.

>Bo
>   ^   Bo Thide'----------------------------------------------Science Director
>  |I|        Swedish Institute of Space Physics, S-755 91 Uppsala, Sweden
>  |R|    Phone: (+46) 18-303671.  Fax: (+46) 18-403100.  IP: 130.238.30.23
> /|F|\          INTERNET: bt@irfu.se      UUCP: ...!mcvax!sunic!irfu!bt  
> ~~U~~ ----------------------------------------------------------------sm5dfw-

	/Matti aarnio <mea@utu.fi>  oh1mqk, Postmaster

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