137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/*-
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* Copyright (c) 1999 Brad Forschinger
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* brad forschinger, 19990504 <retch@flag.blackened.net>
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*
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* written with much help from warp_saver.c
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/syslog.h>
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#include <sys/consio.h>
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#include <sys/fbio.h>
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#include <machine/random.h>
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#include <dev/fb/fbreg.h>
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#include <dev/fb/splashreg.h>
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#include <dev/syscons/syscons.h>
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#define X_SIZE 320
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#define Y_SIZE 200
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static int blanked;
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static u_char fire_pal[768];
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static u_char buf[X_SIZE * (Y_SIZE + 1)];
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static u_char *vid;
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static int
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fire_saver(video_adapter_t *adp, int blank)
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{
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int x, y;
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if (blank) {
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if (blanked <= 0) {
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int red, green, blue;
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int palette_index;
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set_video_mode(adp, M_VGA_CG320);
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/* build and load palette */
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red = green = blue = 0;
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for (palette_index = 0; palette_index < 256; palette_index++) {
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red++;
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if (red > 128)
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green += 2;
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fire_pal[(palette_index * 3) + 0] = red;
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fire_pal[(palette_index * 3) + 1] = green;
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fire_pal[(palette_index * 3) + 2] = blue;
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}
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load_palette(adp, fire_pal);
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blanked++;
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vid = (u_char *) adp->va_window;
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}
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/* make a new bottom line */
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for (x = 0, y = Y_SIZE; x < X_SIZE; x++)
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buf[x + (y * X_SIZE)] = random() % 160 + 96;
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/* fade the flames out */
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for (y = 0; y < Y_SIZE; y++) {
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for (x = 0; x < X_SIZE; x++) {
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buf[x + (y * X_SIZE)] = (buf[(x + 0) + ((y + 0) * X_SIZE)] +
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buf[(x - 1) + ((y + 1) * X_SIZE)] +
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buf[(x + 0) + ((y + 1) * X_SIZE)] +
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buf[(x + 1) + ((y + 1) * X_SIZE)]) / 4;
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if (buf[x + (y * X_SIZE)] > 0)
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buf[x + (y * X_SIZE)]--;
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}
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}
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/* blit our buffer into video ram */
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memcpy(vid, buf, X_SIZE * Y_SIZE);
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} else {
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blanked = 0;
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}
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return 0;
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}
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static int
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fire_initialise(video_adapter_t *adp)
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{
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video_info_t info;
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/* check that the console is capable of running in 320x200x256 */
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if (get_mode_info(adp, M_VGA_CG320, &info)) {
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log(LOG_NOTICE, "fire_saver: the console does not support M_VGA_CG320\n");
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return (ENODEV);
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}
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blanked = 0;
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return 0;
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}
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static int
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fire_terminate(video_adapter_t *adp)
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{
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return 0;
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}
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static scrn_saver_t fire_module = {
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"fire_saver", fire_initialise, fire_terminate, fire_saver, NULL
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};
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SAVER_MODULE(fire_saver, fire_module);
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