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/*-
* Copyright (c) 1995 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: star_saver.c,v 1.10 1997/02/22 12:49:22 peter Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
#include <sys/errno.h>
#include <machine/md_var.h>
#include "saver.h"
MOD_MISC(star_saver);
void (*current_saver)(int blank);
void (*old_saver)(int blank);
#define NUM_STARS 50
/*
* Alternate saver that got its inspiration from a well known utility
* package for an inferior^H^H^H^H^H^Hfamous OS.
*/
static void
star_saver(int blank)
{
scr_stat *scp = cur_console;
int cell, i;
char pattern[] = {"...........++++*** "};
char colors[] = {FG_DARKGREY, FG_LIGHTGREY,
FG_WHITE, FG_LIGHTCYAN};
static u_short stars[NUM_STARS][2];
if (blank) {
if (!scrn_blanked) {
scrn_blanked = 1;
fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], Crtat,
scp->xsize * scp->ysize);
set_border(0);
for(i=0; i<NUM_STARS; i++) {
stars[i][0] =
random() % (scp->xsize*scp->ysize);
stars[i][1] = 0;
}
}
cell = random() % NUM_STARS;
*((u_short*)(Crtat + stars[cell][0])) =
scr_map[pattern[stars[cell][1]]] |
colors[random()%sizeof(colors)] << 8;
if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) {
stars[cell][0] = random() % (scp->xsize*scp->ysize);
stars[cell][1] = 0;
}
}
else {
if (scrn_blanked) {
set_border(scp->border);
scrn_blanked = 0;
scp->start = 0;
scp->end = scp->xsize * scp->ysize;
}
}
}
static int
star_saver_load(struct lkm_table *lkmtp, int cmd)
{
(*current_saver)(0);
old_saver = current_saver;
current_saver = star_saver;
return 0;
}
static int
star_saver_unload(struct lkm_table *lkmtp, int cmd)
{
(*current_saver)(0);
current_saver = old_saver;
return 0;
}
int
star_saver_mod(struct lkm_table *lkmtp, int cmd, int ver)
{
MOD_DISPATCH(star_saver, lkmtp, cmd, ver,
star_saver_load, star_saver_unload, lkm_nullcmd);
}
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