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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.
*
* $Id: fire_saver.c,v 1.2.2.1 1999/05/10 15:20:30 des Exp $
*/
/*
* 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 <machine/md_var.h>
#include <machine/random.h>
#include <saver.h>
#define X_SIZE 320
#define Y_SIZE 200
static int blanked;
static u_char fire_pal[768];
static u_char buf[X_SIZE * (Y_SIZE + 1)];
static u_char *vid;
static int
fire_saver(video_adapter_t *adp, int blank)
{
int x, y;
if (blank) {
if (blanked <= 0) {
int red, green, blue;
int palette_index;
set_video_mode(adp, M_VGA_CG320);
/* build and load palette */
red = green = blue = 0;
for (palette_index = 0; palette_index < 256; palette_index++) {
red++;
if (red > 128)
green += 2;
fire_pal[(palette_index * 3) + 0] = red;
fire_pal[(palette_index * 3) + 1] = green;
fire_pal[(palette_index * 3) + 2] = blue;
}
load_palette(adp, fire_pal);
blanked++;
vid = (u_char *) adp->va_window;
}
/* make a new bottom line */
for (x = 0, y = Y_SIZE; x < X_SIZE; x++)
buf[x + (y * X_SIZE)] = random() % 160 + 96;
/* fade the flames out */
for (y = 0; y < Y_SIZE; y++) {
for (x = 0; x < X_SIZE; x++) {
buf[x + (y * X_SIZE)] = (buf[(x + 0) + ((y + 0) * X_SIZE)] +
buf[(x - 1) + ((y + 1) * X_SIZE)] +
buf[(x + 0) + ((y + 1) * X_SIZE)] +
buf[(x + 1) + ((y + 1) * X_SIZE)]) / 4;
if (buf[x + (y * X_SIZE)] > 0)
buf[x + (y * X_SIZE)]--;
}
}
/* blit our buffer into video ram */
memcpy(vid, buf, X_SIZE * Y_SIZE);
} else {
blanked = 0;
}
return 0;
}
static int
fire_initialise(video_adapter_t *adp)
{
video_info_t info;
/* check that the console is capable of running in 320x200x256 */
if (get_mode_info(adp, M_VGA_CG320, &info)) {
log(LOG_NOTICE, "fire_saver: the console does not support M_VGA_CG320\n");
return (ENODEV);
}
blanked = 0;
return 0;
}
static int
fire_terminate(video_adapter_t *adp)
{
return 0;
}
static scrn_saver_t fire_module = {
"fire_saver", fire_initialise, fire_terminate, fire_saver, NULL
};
SAVER_MODULE(fire_saver, fire_module);
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