113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*-
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* Copyright (c) 1995 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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* in this position and unchanged.
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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 withough 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 1.1 1995/02/22 13:47:36 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/conf.h>
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/lkm.h>
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#include <sys/errno.h>
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#include <saver.h>
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MOD_MISC("star_saver")
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void (*current_saver)();
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void (*old_saver)();
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#define NUM_STARS 50
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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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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 (!scrn_blanked) {
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scrn_blanked = 1;
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fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], Crtat,
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scp->xsize * scp->ysize);
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set_border(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*)(Crtat + 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) {
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set_border(scp->border);
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scrn_blanked = 0;
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scp->start = 0;
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scp->end = scp->xsize * scp->ysize;
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}
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}
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}
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saver_load(struct lkm_table *lkmtp, int cmd)
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{
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(*current_saver)(0);
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old_saver = current_saver;
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current_saver = star_saver;
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uprintf("star screen saver installed\n");
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return 0;
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}
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saver_unload(struct lkm_table *lkmtp, int cmd)
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{
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(*current_saver)(0);
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current_saver = old_saver;
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uprintf("star screen saver removed\n");
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return 0;
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}
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saver_init(struct lkm_table *lkmtp, int cmd, int ver)
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{
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DISPATCH(lkmtp, cmd, ver, saver_load, saver_unload, nosys);
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}
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