Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!leah!rpi!itsgw!brspyr1!tim
From: tim@brspyr1.BRS.Com (Tim Northrup)
Newsgroups: comp.sys.atari.st
Subject: Re: Sozobon C: I need graphics ability!  How to?
Message-ID: <5377@brspyr1.BRS.Com>
Date: 2 Feb 89 18:12:27 GMT
References: <23385@watmath.waterloo.edu>
Distribution: comp
Organization: BRS Information Technologies, Latham NY
Lines: 35

From an article by mwtilden@watmath.waterloo.edu (M.W.Tilden, Hardware):
> I recently got Sozobon all loaded and was annoyed to discover that
> the documentation makes NO MENTION of how to execute graphics!  
> 
> Ideally, all I need is a clear_scrn command along with point, line,
> frame, polygon, text and arc (and the permutations therein).
> 
> If anybody's got a sample program which can do any of this, could
> they please send me compilable source.

Sozobon is just the compiler.  To do graphics you need library of
suitable routines.  On the ST, graphics are usually done using the VDI
which is a set of graphics primitives held in the ROM's.  To get at the
VDI you need a set of bindings in a library.  You have a couple of
choices to get these bindings:

	*  Get ahold of the GEMQ libraries.  This is a set of AES and
	   VDI bindings for Sozobon C (actually, I think they were written
	   for Alcyon, but they work).  I got my copy off of GEnie, but
	   check around, it's probably in other places as well.

	*  Write your own -- using documentation on the VDI calls
	   (I used Compute's Tech Ref -- Vol.1) it's pretty easy to
	   write your own C bindings for them.  I started to do my
	   own and had pretty good success, but then GEMQ came around
	   and I quit on mine.

> Thanx in advance.

You're welcome.
-- 
Tim Northrup      		  +------------------------------------------+
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