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From: paquette@cpsc.ucalgary.ca (Trevor Paquette)
Newsgroups: comp.sys.sgi
Subject: XOR mode
Message-ID: <1990Jun27.040030.17013@calgary.uucp>
Date: 27 Jun 90 04:00:30 GMT
Sender: news@calgary.uucp (Network News Manager)
Organization: The University of Calgary
Lines: 16


  Is there a cheap and dirty way to get XOR mode when doing a draw(),
 sboxf() or even bgnline()..endline()? I am porting an application that
 uses alot of the sunview 'PIX_SRC|PIX_DST' modes when writing to the
 screen. As far as I know about the sgi there is no 'built in' XOR
 mode for doing lines and/or block writes. I really don't want to write
 my own bres' algorithm for lines, checking for pixels along the way
 and XORing them myself, nor do I want to do that for each pixel in a 
 block write.
   Can this be done easily? or should have have another go through the
 manuals and see what I missed.
 Trev
___________________________________________/No man is a failure who has friends
Trevor Paquette  ICBM:51'03"N/114'05"W|I accept the challange, body and soul,
{ubc-cs,utai,alberta}!calgary!paquette|to seek the knowledge of the ones of old
paquette@cpsc.ucalgary.ca             | - engraved on the Kersa Blade of Esalon