Path: utzoo!attcan!uunet!husc6!bloom-beacon!gergle.UUCP!greg
From: greg@gergle.UUCP
Newsgroups: comp.windows.x
Subject: Re:  Scoop on Display Postscript
Message-ID: <8810202328.AA07247@frame.com>
Date: 20 Oct 88 23:28:52 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 25


>I read an article in some computer magazine the other day that was focusing
>on the NeXT machine. They made some comment about how sad it was that the
>NeXT machine was using Display Postscript instead of X. Now, correct me if
>I am wrong but I am assuming that the magazine had things backwards and
>perhaps it meant that NeXT was not using vanilla X?? Or maybe the articles
>author or I am just plain confused?

NeXT is using a different variation of Display PostScript. The DPS for X11 will
be graphics display only. You will still use X11 to create windows and to get
user input.  (A pretty wart on a Toad)  NeXT took Display PostScript and
added extensions to make a windowing system.  You have windows in your graphics
context, and PostScript event procedures which respond to input events.

At a quick glance, NeWS and the Display PostScript are very similiar, except 
NeXT has created a powerfull toolkit in Objective C for the *first* release.

NeWS has been around a long time, and there is still not substantial 
interface library for porting C programs. For example to get input events, 
complete with control & shift masks, you have to get down and dirty in 
PostScript code. (Write an event handler cycle through the KeyState array,
print out binary tokens, write a cps macro to read the results in C)


	-greg.