Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!eagle!rsilverman
From: rsilverman@eagle.wesleyan.edu
Newsgroups: comp.lang.postscript
Subject: Re: EPS and PS, the difference?
Message-ID: <13376@eagle.wesleyan.edu>
Date: 23 Mar 90 20:10:37 GMT
References: <1816@diamond2.UUCP> <133322@sun.Eng.Sun.COM> <1837@diamond2.UUCP>
Distribution: comp
Lines: 31

In article <1837@diamond2.UUCP>, derosa@motcid.UUCP (John DeRosa) writes:
> 
>>    *  SIDE ISSUE: If I have a PS file from Interleaf, I can 
>>    *  print it on the sun with the lpr command and I get the 
>>    *  picture/document (not the PS code).  If I try the 
>>    *  same file on the mac and print it with a text editor
>>    *  like Edit, I get the PS code printout, not the 
>>    *  picture/document (downloading it with Widgets works
>>    *  fine).  Why the difference?

John,

The reason for this is simple.  The lpr command in UNIX simply ships the data
in the specified file off to the printer (possibly filtered along the way). 
That data is PostScript code, which describes an image -- the interpreter in
the printer got it, interpreted it, and produced your image.

On the Mac, though, you loaded the file into an editor.  The editor brought the
text up onto the screen.  You then asked it to print the file.  It did what
people normally want when they ask for a file to be printed -- caused what you
see on the screen to come out on the printer.  To send explicit PostScript code
to a LaserWriter on AppleTalk, you'll need a utility specifically for doing
that.  Adobe has released a simple one called SendPS into the public domain;
I'm sure there are others.  There are also fancier, interactive programming
utilites, like LaserTalk from Emerald City Software.

                                                Richard Silverman

arpa:	rsilverman@eagle.wesleyan.edu           Systems Engineer
bitnet:	rsilverman@wesleyan.bitnet              AM Computer Products
CIS:	[72727,453]                             Southington, CT 06489