106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*-
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* Copyright (c) 1995-1998 Søren Schmidt
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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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* $Id: star_saver.c,v 1.16 1998/09/17 19:40:30 sos Exp $
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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 <machine/md_var.h>
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#include <machine/pc/display.h>
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#include <saver.h>
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#define NUM_STARS 50
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static u_short *window;
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/*
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* Alternate saver that got its inspiration from a well known utility
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* package for an inferior^H^H^H^H^H^Hfamous OS.
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*/
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static void
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star_saver(int blank)
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{
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scr_stat *scp = cur_console;
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int cell, i;
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char pattern[] = {"...........++++*** "};
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char colors[] = {FG_DARKGREY, FG_LIGHTGREY,
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FG_WHITE, FG_LIGHTCYAN};
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static u_short stars[NUM_STARS][2];
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if (blank) {
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if (!ISTEXTSC(scp))
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return;
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if (scrn_blanked <= 0) {
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scp->status |= SAVER_RUNNING;
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window = (u_short *)(*biosvidsw.adapter)(scp->adp)->va_window;
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scrn_blanked = 1;
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fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], window,
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scp->xsize * scp->ysize);
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set_border(scp, 0);
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for(i=0; i<NUM_STARS; i++) {
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stars[i][0] =
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random() % (scp->xsize*scp->ysize);
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stars[i][1] = 0;
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}
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}
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cell = random() % NUM_STARS;
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*((u_short*)(window + stars[cell][0])) =
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scr_map[pattern[stars[cell][1]]] |
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colors[random()%sizeof(colors)] << 8;
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if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) {
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stars[cell][0] = random() % (scp->xsize*scp->ysize);
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stars[cell][1] = 0;
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}
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}
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else {
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if (scrn_blanked > 0) {
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set_border(scp, scp->border);
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scrn_blanked = 0;
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scp->status &= ~SAVER_RUNNING;
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}
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}
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}
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static int
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star_saver_load(void)
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{
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return add_scrn_saver(star_saver);
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}
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static int
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star_saver_unload(void)
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{
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return remove_scrn_saver(star_saver);
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}
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SAVER_MODULE(star_saver);
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