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/*-
* Copyright (c) 1995-1998 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,
* without modification, immediately at the beginning of the file.
* 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 without 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 1.20 1998/11/04 03:49:39 peter Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <machine/md_var.h>
#include <machine/pc/display.h>
#include <saver.h>
static char *message;
static u_char **messagep;
static int messagelen;
static u_short *window;
static int blanked;
static int
snake_saver(video_adapter_t *adp, int blank)
{
static int dirx, diry;
int f;
scr_stat *scp = cur_console;
/* XXX hack for minimal changes. */
#define save message
#define savs messagep
if (blank) {
if (adp->va_mode_flags & V_INFO_GRAPHICS)
return ENODEV;
if (blanked <= 0) {
window = (u_short *)adp->va_window;
fillw(((FG_LIGHTGREY|BG_BLACK)<<8) | scr_map[0x20],
window, scp->xsize * scp->ysize);
set_border(scp, 0);
dirx = (scp->xpos ? 1 : -1);
diry = (scp->ypos ?
scp->xsize : -scp->xsize);
for (f=0; f< messagelen; f++)
savs[f] = (u_char *)window + 2 *
(scp->xpos+scp->ypos*scp->xsize);
*(savs[0]) = scr_map[*save];
blanked = 1;
}
if (blanked++ < 4)
return 0;
blanked = 1;
*(savs[messagelen-1]) = scr_map[0x20];
for (f=messagelen-1; f > 0; f--)
savs[f] = savs[f-1];
f = (savs[0] - (u_char *)window) / 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=messagelen-1; f>=0; f--)
*(savs[f]) = scr_map[save[f]];
}
else {
blanked = 0;
}
return 0;
}
static int
snake_init(video_adapter_t *adp)
{
messagelen = strlen(ostype) + 1 + strlen(osrelease);
message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK);
sprintf(message, "%s %s", ostype, osrelease);
messagep = malloc(messagelen * sizeof *messagep, M_DEVBUF, M_WAITOK);
return 0;
}
static int
snake_term(video_adapter_t *adp)
{
free(message, M_DEVBUF);
free(messagep, M_DEVBUF);
return 0;
}
static scrn_saver_t snake_module = {
"snake_saver", snake_init, snake_term, snake_saver, NULL,
};
SAVER_MODULE(snake_saver, snake_module);
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