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From: garrity@garrity.applicon.UUCP
Newsgroups: comp.graphics
Subject: Re: Munching Squares
Message-ID: <31500003@garrity>
Date: Mon, 8-Jun-87 15:32:00 EDT
Article-I.D.: garrity.31500003
Posted: Mon Jun  8 15:32:00 1987
Date-Received: Sat, 20-Jun-87 03:46:46 EDT
References: <6004@eddie.MIT.EDU>
Lines: 71
Nf-ID: #R:eddie.MIT.EDU:-600400:garrity:31500003:000:1536
Nf-From: garrity.applicon.UUCP!garrity    Jun  8 15:32:00 1987


  If you use SunView, the following implementation of munching squares makes
a pretty good replacement for the default lockscreen.  If you are sick of that
life game, simply compile this program into a file called munch, and then type
"lockscreen munch" instead of lockscreen.

#include <stdio.h>
#include <pixrect/pixrect_hs.h>
#include <signal.h>

#define SIZE 1280

int             alarm_handler();
int             restart;
main(argc, argv)
   int             argc;
   char           *argv[];
{
   int             seed, acc, fd, x, y;
   struct pixrect *pr;
   signal(SIGALRM, alarm_handler);

   alarm(30);
   while (1)
   {
      if (argc > 1)
	 sscanf(argv[1], "%ld", &seed);
      else
      {
	 srandom(time(0));
	 seed = random();
      }

      acc = seed;

      pr = pr_open("/dev/fb");

      pr_rop(pr, 0, 0, SIZE, SIZE, PIX_SET, 0, 0, 0);
      restart = 0;
      while (!restart)
      {
	 x = acc & 255;
	 y = (acc >> 8) & 255;

	 pr_rop(pr, x * 5, y * 5, 5, 5, PIX_SRC ^ PIX_DST | PIX_COLOR(1), 0, 0, 0);

	 acc += seed;
      }
   }
}

int
alarm_handler(sig, code)
   int             sig, code;
{
   restart = 1;
   alarm(30);
}

-- Mike Garrity
--
-- Asking is just polite demanding.
--                           Max Headroom
--
-- snail: Applicon, a division of Schlumberger Systems, Inc.
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