star_saver.c revision 24674
16628Ssos/*- 26628Ssos * Copyright (c) 1995 S�ren Schmidt 36628Ssos * All rights reserved. 46628Ssos * 56628Ssos * Redistribution and use in source and binary forms, with or without 66628Ssos * modification, are permitted provided that the following conditions 76628Ssos * are met: 86628Ssos * 1. Redistributions of source code must retain the above copyright 98871Srgrimes * notice, this list of conditions and the following disclaimer 106628Ssos * in this position and unchanged. 116628Ssos * 2. Redistributions in binary form must reproduce the above copyright 126628Ssos * notice, this list of conditions and the following disclaimer in the 136628Ssos * documentation and/or other materials provided with the distribution. 146628Ssos * 3. The name of the author may not be used to endorse or promote products 156628Ssos * derived from this software withough specific prior written permission 166628Ssos * 176628Ssos * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 186628Ssos * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 196628Ssos * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 206628Ssos * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 216628Ssos * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 226628Ssos * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236628Ssos * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246628Ssos * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256628Ssos * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 266628Ssos * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276628Ssos * 2824674Sdufault * $Id: star_saver.c,v 1.10 1997/02/22 12:49:22 peter Exp $ 296628Ssos */ 306628Ssos 316628Ssos#include <sys/param.h> 326628Ssos#include <sys/systm.h> 336628Ssos#include <sys/conf.h> 346628Ssos#include <sys/exec.h> 356628Ssos#include <sys/sysent.h> 366628Ssos#include <sys/lkm.h> 376628Ssos#include <sys/errno.h> 386628Ssos 3916879Sbde#include <machine/md_var.h> 4016879Sbde 4116879Sbde#include "saver.h" 4216879Sbde 4312276SbdeMOD_MISC(star_saver); 446628Ssos 4512276Sbdevoid (*current_saver)(int blank); 4612276Sbdevoid (*old_saver)(int blank); 476628Ssos 486628Ssos#define NUM_STARS 50 496628Ssos 506628Ssos/* 516628Ssos * Alternate saver that got its inspiration from a well known utility 526628Ssos * package for an inferior^H^H^H^H^H^Hfamous OS. 536628Ssos */ 5412276Sbdestatic void 556628Ssosstar_saver(int blank) 566628Ssos{ 576628Ssos scr_stat *scp = cur_console; 586628Ssos int cell, i; 596628Ssos char pattern[] = {"...........++++*** "}; 608871Srgrimes char colors[] = {FG_DARKGREY, FG_LIGHTGREY, 616628Ssos FG_WHITE, FG_LIGHTCYAN}; 626628Ssos static u_short stars[NUM_STARS][2]; 638871Srgrimes 646628Ssos if (blank) { 656628Ssos if (!scrn_blanked) { 666628Ssos scrn_blanked = 1; 678871Srgrimes fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], Crtat, 686628Ssos scp->xsize * scp->ysize); 696628Ssos set_border(0); 706628Ssos for(i=0; i<NUM_STARS; i++) { 718871Srgrimes stars[i][0] = 726628Ssos random() % (scp->xsize*scp->ysize); 736628Ssos stars[i][1] = 0; 746628Ssos } 756628Ssos } 766628Ssos cell = random() % NUM_STARS; 778871Srgrimes *((u_short*)(Crtat + stars[cell][0])) = 788871Srgrimes scr_map[pattern[stars[cell][1]]] | 796628Ssos colors[random()%sizeof(colors)] << 8; 806628Ssos if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) { 816628Ssos stars[cell][0] = random() % (scp->xsize*scp->ysize); 826628Ssos stars[cell][1] = 0; 836628Ssos } 846628Ssos } 856628Ssos else { 866628Ssos if (scrn_blanked) { 876628Ssos set_border(scp->border); 886628Ssos scrn_blanked = 0; 897500Ssos scp->start = 0; 907500Ssos scp->end = scp->xsize * scp->ysize; 916628Ssos } 926628Ssos } 936628Ssos} 946628Ssos 9512276Sbdestatic int 9611857Speterstar_saver_load(struct lkm_table *lkmtp, int cmd) 976628Ssos{ 986628Ssos (*current_saver)(0); 996628Ssos old_saver = current_saver; 1006628Ssos current_saver = star_saver; 1016628Ssos return 0; 1026628Ssos} 1036628Ssos 10412276Sbdestatic int 10511857Speterstar_saver_unload(struct lkm_table *lkmtp, int cmd) 1066628Ssos{ 1076628Ssos (*current_saver)(0); 1086628Ssos current_saver = old_saver; 1096628Ssos return 0; 1106628Ssos} 1116628Ssos 11212276Sbdeint 11311857Speterstar_saver_mod(struct lkm_table *lkmtp, int cmd, int ver) 1146628Ssos{ 11524674Sdufault MOD_DISPATCH(star_saver, lkmtp, cmd, ver, 11624674Sdufault star_saver_load, star_saver_unload, lkm_nullcmd); 1176628Ssos} 118