1 /*- 2 * Copyright (c) 1995-1998 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 * without modification, immediately at the beginning of the file. 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 without 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 1.16 1998/09/17 19:40:30 sos Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 36 #include <machine/md_var.h> 37 #include <machine/pc/display.h> 38 39 #include <saver.h> 40 41 #define NUM_STARS 50 42 43 static u_short *window; 44 45 /* 46 * Alternate saver that got its inspiration from a well known utility 47 * package for an inferior^H^H^H^H^H^Hfamous OS. 48 */ 49 static void 50 star_saver(int blank) 51 { 52 scr_stat *scp = cur_console; 53 int cell, i; 54 char pattern[] = {"...........++++*** "}; 55 char colors[] = {FG_DARKGREY, FG_LIGHTGREY, 56 FG_WHITE, FG_LIGHTCYAN}; 57 static u_short stars[NUM_STARS][2]; 58 59 if (blank) { 60 if (!ISTEXTSC(scp)) 61 return; 62 if (scrn_blanked <= 0) { 63 scp->status |= SAVER_RUNNING; 64 window = (u_short *)(*biosvidsw.adapter)(scp->adp)->va_window; 65 scrn_blanked = 1; 66 fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], window, 67 scp->xsize * scp->ysize); 68 set_border(scp, 0); 69 for(i=0; i<NUM_STARS; i++) { 70 stars[i][0] = 71 random() % (scp->xsize*scp->ysize); 72 stars[i][1] = 0; 73 } 74 } 75 cell = random() % NUM_STARS; 76 *((u_short*)(window + stars[cell][0])) = 77 scr_map[pattern[stars[cell][1]]] | 78 colors[random()%sizeof(colors)] << 8; 79 if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) { 80 stars[cell][0] = random() % (scp->xsize*scp->ysize); 81 stars[cell][1] = 0; 82 } 83 } 84 else { 85 if (scrn_blanked > 0) { 86 set_border(scp, scp->border); 87 scrn_blanked = 0; 88 scp->status &= ~SAVER_RUNNING; 89 } 90 } 91 } 92 93 static int 94 star_saver_load(void) 95 { 96 return add_scrn_saver(star_saver); 97 } 98 99 static int 100 star_saver_unload(void) 101 { 102 return remove_scrn_saver(star_saver); 103 } 104 105 SAVER_MODULE(star_saver); 106