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 1.6 1995/11/14 07:35:06 bde 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 #include <saver.h> 39 40 MOD_MISC(star_saver); 41 42 void (*current_saver)(int blank); 43 void (*old_saver)(int blank); 44 45 #define NUM_STARS 50 46 47 /* 48 * Alternate saver that got its inspiration from a well known utility 49 * package for an inferior^H^H^H^H^H^Hfamous OS. 50 */ 51 static void 52 star_saver(int blank) 53 { 54 scr_stat *scp = cur_console; 55 int cell, i; 56 char pattern[] = {"...........++++*** "}; 57 char colors[] = {FG_DARKGREY, FG_LIGHTGREY, 58 FG_WHITE, FG_LIGHTCYAN}; 59 static u_short stars[NUM_STARS][2]; 60 61 if (blank) { 62 if (!scrn_blanked) { 63 scrn_blanked = 1; 64 fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], Crtat, 65 scp->xsize * scp->ysize); 66 set_border(0); 67 for(i=0; i<NUM_STARS; i++) { 68 stars[i][0] = 69 random() % (scp->xsize*scp->ysize); 70 stars[i][1] = 0; 71 } 72 } 73 cell = random() % NUM_STARS; 74 *((u_short*)(Crtat + stars[cell][0])) = 75 scr_map[pattern[stars[cell][1]]] | 76 colors[random()%sizeof(colors)] << 8; 77 if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) { 78 stars[cell][0] = random() % (scp->xsize*scp->ysize); 79 stars[cell][1] = 0; 80 } 81 } 82 else { 83 if (scrn_blanked) { 84 set_border(scp->border); 85 scrn_blanked = 0; 86 scp->start = 0; 87 scp->end = scp->xsize * scp->ysize; 88 } 89 } 90 } 91 92 static int 93 star_saver_load(struct lkm_table *lkmtp, int cmd) 94 { 95 (*current_saver)(0); 96 old_saver = current_saver; 97 current_saver = star_saver; 98 return 0; 99 } 100 101 static int 102 star_saver_unload(struct lkm_table *lkmtp, int cmd) 103 { 104 (*current_saver)(0); 105 current_saver = old_saver; 106 return 0; 107 } 108 109 int 110 star_saver_mod(struct lkm_table *lkmtp, int cmd, int ver) 111 { 112 DISPATCH(lkmtp, cmd, ver, star_saver_load, star_saver_unload, 113 lkm_nullcmd); 114 } 115