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/*-
* Copyright (c) 1999 Brad Forschinger
* 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.
*
* 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.
*
* $FreeBSD$
*/
/*
* brad forschinger, 19990504 <retch@flag.blackened.net>
*
* written with much help from warp_saver.c
*
*/
#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/malloc.h>
#include <sys/fbio.h>
#include <dev/fb/fbreg.h>
#include <dev/fb/splashreg.h>
#include <dev/syscons/syscons.h>
#define SAVER_NAME "fire_saver"
#define RED(n) ((n) * 3 + 0)
#define GREEN(n) ((n) * 3 + 1)
#define BLUE(n) ((n) * 3 + 2)
#define SET_ORIGIN(adp, o) do { \
int oo = o; \
if (oo != last_origin) \
set_origin(adp, last_origin = oo); \
} while (0)
static u_char *buf;
static u_char *vid;
static int banksize, scrmode, bpsl, scrw, scrh;
static u_char fire_pal[768];
static int blanked;
static void
fire_update(video_adapter_t *adp)
{
int x, y;
int o, p;
int last_origin = -1;
/* make a new bottom line */
for (x = 0, y = scrh; x < scrw; x++)
buf[x + (y * bpsl)] = random() % 160 + 96;
/* fade the flames out */
for (y = 0; y < scrh; y++) {
for (x = 0; x < scrw; x++) {
buf[x + (y * scrw)] =
(buf[(x + 0) + ((y + 0) * scrw)] +
buf[(x - 1) + ((y + 1) * scrw)] +
buf[(x + 0) + ((y + 1) * scrw)] +
buf[(x + 1) + ((y + 1) * scrw)]) / 4;
if (buf[x + (y * scrw)] > 0)
buf[x + (y * scrw)]--;
}
}
/* blit our buffer into video ram */
for (y = 0, p = 0, o = 0; y < scrh; y++, p += bpsl) {
while (p > banksize) {
p -= banksize;
o += banksize;
}
SET_ORIGIN(adp, o);
if (p + scrw < banksize) {
bcopy(buf + y * scrw, vid + p, scrw);
} else {
bcopy(buf + y * scrw, vid + p, banksize - p);
SET_ORIGIN(adp, o + banksize);
bcopy(buf + y * scrw + (banksize - p), vid,
scrw - (banksize - p));
p -= banksize;
o += banksize;
}
}
}
static int
fire_saver(video_adapter_t *adp, int blank)
{
int pl;
if (blank) {
/* switch to graphics mode */
if (blanked <= 0) {
pl = splhigh();
set_video_mode(adp, scrmode);
load_palette(adp, fire_pal);
blanked++;
vid = (u_char *)adp->va_window;
banksize = adp->va_window_size;
bpsl = adp->va_line_width;
splx(pl);
(*vidsw[adp->va_index]->clear)(adp);
}
fire_update(adp);
} else {
blanked = 0;
}
return 0;
}
static int
fire_init(video_adapter_t *adp)
{
video_info_t info;
int i, red, green, blue;
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;
buf = (u_char *)malloc(scrw * (scrh + 1), M_DEVBUF, M_NOWAIT);
if (buf) {
bzero(buf, scrw * (scrh + 1));
} else {
log(LOG_NOTICE,
"%s: buffer allocation is failed\n",
SAVER_NAME);
return (ENODEV);
}
/* intialize the palette */
red = green = blue = 0;
for (i = 0; i < 256; i++) {
red++;
if (red > 128)
green += 2;
fire_pal[RED(i)] = red;
fire_pal[GREEN(i)] = green;
fire_pal[BLUE(i)] = blue;
}
return (0);
}
static int
fire_term(video_adapter_t *adp)
{
free(buf, M_DEVBUF);
return (0);
}
static scrn_saver_t fire_module = {
SAVER_NAME,
fire_init,
fire_term,
fire_saver,
NULL
};
SAVER_MODULE(fire_saver, fire_module);
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