Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!mit-eddie!bloom-beacon!BOULDER.COLORADO.EDU!jorgy
From: jorgy@BOULDER.COLORADO.EDU
Newsgroups: comp.windows.x
Subject: Bitmaps and GXor
Message-ID: <9011202300.AA01414@refuge.colorado.edu>
Date: 20 Nov 90 23:00:38 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 63


I have a couple of bitmaps that I would like to draw on the screen
using GXor.

Both mono and 8 plane color monitors are available to me, and I
would like to be able to use both, though I realize that the code must
be modified slightly for each case. 
I assume it would be something like:

if (DisplayPlanes(dpy,DefaultScreen(dpy)) == 1) then
	set up gc for mono
else 
	set up gc for color
endif




Let's say that the bitmap is something like:

                             
                  X          
                X   X        
              X       X      
            X           X    
          X               X  
            X           X    
              X       X      
                X   X        
                  X          


And we draw two of them that overlap:

                  X          
                X   X        
              X       X      
            X           X    
          X               X  
            X    X      X    
              XX   X  X      
             X  X   XX       
           X      X    X    
         X               X
           X           X    
             X       X
               X   X
		 X


The problem is getting the gc's set right so that the overlap works
right.

Anyone have any experience with this?

Thanks in advance,

jorgy


Eric R. Jorgensen		         internet: jorgy@boulder.colorado.edu
University of Colorado, Boulder          uucp: ...!{ncar|nbires}!boulder!jorgy
Unixops/Distributed Computing Services   bitnet:   jorgy@colorado.BITNET