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/*-
* Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
* 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 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: rain_saver.c,v 1.1 1998/12/31 13:41:40 des Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/syslog.h>
#include <machine/random.h>
#include <saver.h>
static u_char *vid;
#define SCRW 320
#define SCRH 200
#define MAX 63
static u_char rain_pal[768];
static int blanked;
static void
rain_update(video_adapter_t *adp)
{
int i, t;
t = rain_pal[(MAX*3+2)];
for (i = (MAX*3+2); i > 5; i -= 3)
rain_pal[i] = rain_pal[i-3];
rain_pal[5] = t;
load_palette(adp, rain_pal);
}
static int
rain_saver(video_adapter_t *adp, int blank)
{
int i, j, k, pl;
if (blank) {
/* switch to graphics mode */
if (blanked <= 0) {
pl = splhigh();
set_video_mode(adp, M_VGA_CG320, rain_pal, 0);
blanked++;
vid = (u_char *)adp->va_window;
splx(pl);
bzero(vid, SCRW*SCRH);
for (i = 0; i < SCRW; i += 2)
vid[i] = 1 + (random() % MAX);
for (j = 1, k = SCRW; j < SCRH; j++)
for (i = 0; i < SCRW; i += 2, k += 2)
vid[k] = (vid[k-SCRW] < MAX) ? 1 + vid[k-SCRW] : 1;
}
/* update display */
rain_update(adp);
} else {
blanked = 0;
}
return 0;
}
static int
rain_init(video_adapter_t *adp)
{
video_info_t info;
int i;
/* check that the console is capable of running in 320x200x256 */
if (get_mode_info(adp, M_VGA_CG320, &info)) {
log(LOG_NOTICE, "rain_saver: the console does not support M_VGA_CG320\n");
return ENODEV;
}
/* intialize the palette */
for (i = 3; i < (MAX+1)*3; i += 3)
rain_pal[i+2] = rain_pal[i-1] + 4;
blanked = 0;
return 0;
}
static int
rain_term(video_adapter_t *adp)
{
return 0;
}
static scrn_saver_t rain_module = {
"rain_saver", rain_init, rain_term, rain_saver, NULL,
};
SAVER_MODULE(rain_saver, rain_module);
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