172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/*-
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/consio.h>
|
|
#include <sys/fbio.h>
|
|
|
|
#include <dev/fb/fbreg.h>
|
|
#include <dev/fb/splashreg.h>
|
|
#include <dev/syscons/syscons.h>
|
|
|
|
#define SAVER_NAME "rain_saver"
|
|
#define MAX 63 /* number of colors (in addition to black) */
|
|
#define INCREMENT 4 /* increment between colors */
|
|
|
|
#define RED(n) ((n) * 3 + 0)
|
|
#define GREEN(n) ((n) * 3 + 1)
|
|
#define BLUE(n) ((n) * 3 + 2)
|
|
|
|
static u_char *vid;
|
|
static int banksize, scrmode, bpsl, scrw, scrh;
|
|
static u_char rain_pal[768];
|
|
static int blanked;
|
|
|
|
static void
|
|
rain_update(video_adapter_t *adp)
|
|
{
|
|
int i, t;
|
|
|
|
t = rain_pal[BLUE(MAX)];
|
|
for (i = MAX; i > 1; i--)
|
|
rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)];
|
|
rain_pal[BLUE(1)] = t;
|
|
load_palette(adp, rain_pal);
|
|
}
|
|
|
|
static int
|
|
rain_saver(video_adapter_t *adp, int blank)
|
|
{
|
|
int i, j, o, p, pl;
|
|
u_char temp;
|
|
|
|
if (blank) {
|
|
/* switch to graphics mode */
|
|
if (blanked <= 0) {
|
|
pl = splhigh();
|
|
set_video_mode(adp, scrmode);
|
|
load_palette(adp, rain_pal);
|
|
set_border(adp, 0);
|
|
blanked++;
|
|
vid = (u_char *)adp->va_window;
|
|
banksize = adp->va_window_size;
|
|
bpsl = adp->va_line_width;
|
|
splx(pl);
|
|
for (i = 0; i < bpsl*scrh; i += banksize) {
|
|
set_origin(adp, i);
|
|
if ((bpsl * scrh - i) < banksize)
|
|
bzero(vid, bpsl * scrh - i);
|
|
else
|
|
bzero(vid, banksize);
|
|
}
|
|
set_origin(adp, 0);
|
|
for (i = 0, o = 0, p = 0; i < scrw; i += 2, p += 2) {
|
|
if (p > banksize) {
|
|
p -= banksize;
|
|
o += banksize;
|
|
set_origin(adp, o);
|
|
}
|
|
vid[p] = 1 + (random() % MAX);
|
|
}
|
|
o = 0; p = 0;
|
|
for (j = 1; j < scrh; j++)
|
|
for (i = 0, p = bpsl * (j - 1) - o; i < scrw; i += 2, p+= 2) {
|
|
while (p > banksize) {
|
|
p -= banksize;
|
|
o += banksize;
|
|
}
|
|
set_origin(adp, o);
|
|
temp = (vid[p] < MAX) ? 1 + vid[p] : 1;
|
|
if (p + bpsl < banksize) {
|
|
vid[p + bpsl] = temp;
|
|
} else {
|
|
set_origin(adp, o + banksize);
|
|
vid[p + bpsl - banksize] = temp;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* update display */
|
|
rain_update(adp);
|
|
} else {
|
|
blanked = 0;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
rain_init(video_adapter_t *adp)
|
|
{
|
|
video_info_t info;
|
|
int i;
|
|
|
|
if (!get_mode_info(adp, M_VGA_CG320, &info)) {
|
|
scrmode = M_VGA_CG320;
|
|
} else if (!get_mode_info(adp, M_PC98_PEGC640x480, &info)) {
|
|
scrmode = M_PC98_PEGC640x480;
|
|
} else if (!get_mode_info(adp, M_PC98_PEGC640x400, &info)) {
|
|
scrmode = M_PC98_PEGC640x400;
|
|
} else {
|
|
log(LOG_NOTICE,
|
|
"%s: the console does not support M_VGA_CG320\n",
|
|
SAVER_NAME);
|
|
return (ENODEV);
|
|
}
|
|
|
|
scrw = info.vi_width;
|
|
scrh = info.vi_height;
|
|
|
|
/* intialize the palette */
|
|
for (i = 1; i < MAX; i++)
|
|
rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)] + INCREMENT;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
rain_term(video_adapter_t *adp)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static scrn_saver_t rain_module = {
|
|
SAVER_NAME,
|
|
rain_init,
|
|
rain_term,
|
|
rain_saver,
|
|
NULL
|
|
};
|
|
|
|
SAVER_MODULE(rain_saver, rain_module);
|