123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/*-
|
|
* 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: snake_saver.c,v 1.3 1995/05/16 19:10:11 sos 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 <saver.h>
|
|
|
|
MOD_MISC("snake_saver")
|
|
|
|
void (*current_saver)();
|
|
void (*old_saver)();
|
|
|
|
static void
|
|
snake_saver(int blank)
|
|
{
|
|
const char saves[] = {"FreeBSD-2.0.5"};
|
|
static u_char *savs[sizeof(saves)-1];
|
|
static int dirx, diry;
|
|
int f;
|
|
scr_stat *scp = cur_console;
|
|
|
|
if (blank) {
|
|
if (!scrn_blanked) {
|
|
fillw((FG_LIGHTGREY|BG_BLACK)<<8 | scr_map[0x20],
|
|
Crtat, scp->xsize * scp->ysize);
|
|
set_border(0);
|
|
dirx = (scp->xpos ? 1 : -1);
|
|
diry = (scp->ypos ?
|
|
scp->xsize : -scp->xsize);
|
|
for (f=0; f< sizeof(saves)-1; f++)
|
|
savs[f] = (u_char *)Crtat + 2 *
|
|
(scp->xpos+scp->ypos*scp->xsize);
|
|
*(savs[0]) = scr_map[*saves];
|
|
f = scp->ysize * scp->xsize + 5;
|
|
outb(crtc_addr, 14);
|
|
outb(crtc_addr+1, f >> 8);
|
|
outb(crtc_addr, 15);
|
|
outb(crtc_addr+1, f & 0xff);
|
|
scrn_blanked = 1;
|
|
}
|
|
if (scrn_blanked++ < 4)
|
|
return;
|
|
scrn_blanked = 1;
|
|
*(savs[sizeof(saves)-2]) = scr_map[0x20];
|
|
for (f=sizeof(saves)-2; f > 0; f--)
|
|
savs[f] = savs[f-1];
|
|
f = (savs[0] - (u_char *)Crtat) / 2;
|
|
if ((f % scp->xsize) == 0 ||
|
|
(f % scp->xsize) == scp->xsize - 1 ||
|
|
(random() % 50) == 0)
|
|
dirx = -dirx;
|
|
if ((f / scp->xsize) == 0 ||
|
|
(f / scp->xsize) == scp->ysize - 1 ||
|
|
(random() % 20) == 0)
|
|
diry = -diry;
|
|
savs[0] += 2*dirx + 2*diry;
|
|
for (f=sizeof(saves)-2; f>=0; f--)
|
|
*(savs[f]) = scr_map[saves[f]];
|
|
}
|
|
else {
|
|
if (scrn_blanked) {
|
|
set_border(scp->border);
|
|
scrn_blanked = 0;
|
|
scp->start = 0;
|
|
scp->end = scp->xsize * scp->ysize;
|
|
}
|
|
}
|
|
}
|
|
|
|
saver_load(struct lkm_table *lkmtp, int cmd)
|
|
{
|
|
(*current_saver)(0);
|
|
old_saver = current_saver;
|
|
current_saver = snake_saver;
|
|
uprintf("snake screen saver installed\n");
|
|
return 0;
|
|
}
|
|
|
|
saver_unload(struct lkm_table *lkmtp, int cmd)
|
|
{
|
|
(*current_saver)(0);
|
|
current_saver = old_saver;
|
|
uprintf("snake screen saver removed\n");
|
|
return 0;
|
|
}
|
|
|
|
saver_init(struct lkm_table *lkmtp, int cmd, int ver)
|
|
{
|
|
DISPATCH(lkmtp, cmd, ver, saver_load, saver_unload, nosys);
|
|
}
|