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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.
*
* $FreeBSD$
*/
#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"
#ifdef MAX
#undef MAX
#endif
#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);
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