Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!uunet!mcsun!hp4nl!eurtrx!euraiv1!rener
From: rener@cs.eur.nl (Rene Roelofs)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Turbo C graphics
Message-ID: <1989Nov2.125005.12089@cs.eur.nl>
Date: 2 Nov 89 12:50:05 GMT
References: <452@qmfl.jrdc.go.jp>
Organization: Erasmus University Rotterdam, dept. EUR/EF/CS (Informatica)
Lines: 21

spee@qmfl.jrdc.go.jp (Paul SPEE) writes:

>A friend of mine wants to know whether it is possible to draw
>lines xor'ed with the screen in Turbo C.

the routine setwritemode set the writing mode for graphics line drawing

void far setwritemode(int mode)

   mode = 0 : overwrite
        = 1 : perform XOR put.

I used this for drawing lines across a picture and removing the line
again with the same routine. This works fine and fast.
( I'm talking about TC 2.0 here BTW .. )

-- 
    |-----\                        Rene Roelofs 
    |     |                        Dept. of Computer Science
   /|-----/                        Erasmus University Rotterdam, The Netherlands
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