smoothcolor/smoothcolor_mixter.c at main · raidoh/smoothcolor · GitHub

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/* http://members.xoom.com/i0wnu - Mixter Security
 * Cool color stuff for all (X-hating) linux people :)
 * Run as root on the console (not on ttyP or xterm)
 * i modified this, so the usage is: smoothcolor [colorcycle-time]
 * for something like the brainwave stimulator for DOS, try:
 * scolor 50000;scolor 40000;scolor 30000;scolor 20000;scolor 10000;\
 * perl -e 'print "\254" x 2000' # f**s with your brain :) */

/*
 * smoothcolor v1.0 by baldor & giemor
 * quick hack - done in about 30mins during a meeting on April 9th 98
 *
 * compile with gcc -O -o smoothcolor smoothcolor.c
 * (DON'T FORGET THE -O : the program doesnt compile without it !!!)
 *
 * you have to run this program as root because it accesses the ports
 * directly.
 *
 * works with Linux only !
 */

#include <stdio.h>
#include <unistd.h>
#include <asm/io.h>

void
pal (int color, int r, int g, int b)
{
  outb (color, 0x3c8);
  outb (r, 0x3c9);
  outb (g, 0x3c9);
  outb (b, 0x3c9);
}

void
docolor (int wait)
{
  int i;

  /* I know this is ugly but hey - it works ! */

  for (i = 63; i > 0; i--)
    {
      usleep (wait);
      pal (7, 63, i, i);
    }
  for (i = 0; i < 63; i++)
    {
      usleep (wait);
      pal (7, 63, i, 0);
    }
  for (i = 63; i > 0; i--)
    {
      usleep (wait);
      pal (7, i, 63, 0);
    }
  for (i = 0; i < 63; i++)
    {
      usleep (wait);
      pal (7, 0, 63, i);
    }
  for (i = 63; i > 0; i--)
    {
      usleep (wait);
      pal (7, 0, i, 63);
    }
  for (i = 0; i < 63; i++)
    {
      usleep (wait);
      pal (7, i, 0, 63);
    }
  for (i = 0; i < 63; i++)
    {
      usleep (wait);
      pal (7, 63, i, 63);
    }
}

int
main (int argc, char *argv[])
{
  int i, x = 30000;
  printf ("\n                Smoothcolor v1.0 by baldor & giemor (1998)\n\n");

  if ((getuid () != 0) && (geteuid () != 0))
    {
      printf ("ERROR: you need to be root to run this program\n");
      exit (1);
    }
  if (argc == 2)
    if (atoi (argv[1]) > 0)
      x = atoi (argv[1]);

  if (fork () != 0)
    return (0);			/* go into background */

  /* Get IO-Permissions for port */
  ioperm (0x3c8, 3, 1);
  ioperm (0x3c9, 3, 1);

  while (1)
    {
      docolor (x);
    }

  /* Drop the permissions */
  ioperm (0x3c8, 3, 0);
  ioperm (0x3c9, 3, 0);
}