1 /*- 2 * Copyright (c) 1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software withough specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $Id: star_saver.c,v 1.7 1995/11/29 20:10:33 wollman Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/conf.h> 34 #include <sys/exec.h> 35 #include <sys/sysent.h> 36 #include <sys/lkm.h> 37 #include <sys/errno.h> 38 39 #include <machine/md_var.h> 40 41 #include "saver.h" 42 43 MOD_MISC(star_saver); 44 45 void (*current_saver)(int blank); 46 void (*old_saver)(int blank); 47 48 #define NUM_STARS 50 49 50 /* 51 * Alternate saver that got its inspiration from a well known utility 52 * package for an inferior^H^H^H^H^H^Hfamous OS. 53 */ 54 static void 55 star_saver(int blank) 56 { 57 scr_stat *scp = cur_console; 58 int cell, i; 59 char pattern[] = {"...........++++*** "}; 60 char colors[] = {FG_DARKGREY, FG_LIGHTGREY, 61 FG_WHITE, FG_LIGHTCYAN}; 62 static u_short stars[NUM_STARS][2]; 63 64 if (blank) { 65 if (!scrn_blanked) { 66 scrn_blanked = 1; 67 fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], Crtat, 68 scp->xsize * scp->ysize); 69 set_border(0); 70 for(i=0; i<NUM_STARS; i++) { 71 stars[i][0] = 72 random() % (scp->xsize*scp->ysize); 73 stars[i][1] = 0; 74 } 75 } 76 cell = random() % NUM_STARS; 77 *((u_short*)(Crtat + stars[cell][0])) = 78 scr_map[pattern[stars[cell][1]]] | 79 colors[random()%sizeof(colors)] << 8; 80 if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) { 81 stars[cell][0] = random() % (scp->xsize*scp->ysize); 82 stars[cell][1] = 0; 83 } 84 } 85 else { 86 if (scrn_blanked) { 87 set_border(scp->border); 88 scrn_blanked = 0; 89 scp->start = 0; 90 scp->end = scp->xsize * scp->ysize; 91 } 92 } 93 } 94 95 static int 96 star_saver_load(struct lkm_table *lkmtp, int cmd) 97 { 98 (*current_saver)(0); 99 old_saver = current_saver; 100 current_saver = star_saver; 101 return 0; 102 } 103 104 static int 105 star_saver_unload(struct lkm_table *lkmtp, int cmd) 106 { 107 (*current_saver)(0); 108 current_saver = old_saver; 109 return 0; 110 } 111 112 int 113 star_saver_mod(struct lkm_table *lkmtp, int cmd, int ver) 114 { 115 DISPATCH(lkmtp, cmd, ver, star_saver_load, star_saver_unload, 116 lkm_nullcmd); 117 } 118