star_saver.c revision 39428
16628Ssos/*- 239287Ssos * Copyright (c) 1995-1998 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 939287Ssos * notice, this list of conditions and the following disclaimer, 1039287Ssos * without modification, immediately at the beginning of the file. 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 1539287Ssos * derived from this software without 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 * 2839428Ssos * $Id: star_saver.c,v 1.15 1998/09/15 18:16:39 sos Exp $ 296628Ssos */ 306628Ssos 316628Ssos#include <sys/param.h> 326628Ssos#include <sys/systm.h> 336628Ssos#include <sys/exec.h> 346628Ssos#include <sys/sysent.h> 356628Ssos#include <sys/lkm.h> 366628Ssos 3716879Sbde#include <machine/md_var.h> 3832571Sbde#include <machine/pc/display.h> 3916879Sbde 4027427Syokota#include <saver.h> 4116879Sbde 4212276SbdeMOD_MISC(star_saver); 436628Ssos 446628Ssos#define NUM_STARS 50 456628Ssos 4639428Ssosstatic u_short *window; 4739428Ssos 486628Ssos/* 496628Ssos * Alternate saver that got its inspiration from a well known utility 506628Ssos * package for an inferior^H^H^H^H^H^Hfamous OS. 516628Ssos */ 5212276Sbdestatic void 536628Ssosstar_saver(int blank) 546628Ssos{ 556628Ssos scr_stat *scp = cur_console; 566628Ssos int cell, i; 576628Ssos char pattern[] = {"...........++++*** "}; 588871Srgrimes char colors[] = {FG_DARKGREY, FG_LIGHTGREY, 596628Ssos FG_WHITE, FG_LIGHTCYAN}; 606628Ssos static u_short stars[NUM_STARS][2]; 618871Srgrimes 626628Ssos if (blank) { 6339428Ssos if (!ISTEXTSC(scp)) 6439428Ssos return; 6527427Syokota if (scrn_blanked <= 0) { 6639428Ssos scp->status |= SAVER_RUNNING; 6739428Ssos window = (u_short *)(*biosvidsw.adapter)(scp->adp)->va_window; 686628Ssos scrn_blanked = 1; 6939428Ssos fillw((FG_LIGHTGREY|BG_BLACK)<<8|scr_map[0x20], window, 706628Ssos scp->xsize * scp->ysize); 7139287Ssos set_border(scp, 0); 726628Ssos for(i=0; i<NUM_STARS; i++) { 738871Srgrimes stars[i][0] = 746628Ssos random() % (scp->xsize*scp->ysize); 756628Ssos stars[i][1] = 0; 766628Ssos } 776628Ssos } 786628Ssos cell = random() % NUM_STARS; 7939428Ssos *((u_short*)(window + stars[cell][0])) = 808871Srgrimes scr_map[pattern[stars[cell][1]]] | 816628Ssos colors[random()%sizeof(colors)] << 8; 826628Ssos if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) { 836628Ssos stars[cell][0] = random() % (scp->xsize*scp->ysize); 846628Ssos stars[cell][1] = 0; 856628Ssos } 866628Ssos } 876628Ssos else { 8827427Syokota if (scrn_blanked > 0) { 8939287Ssos set_border(scp, scp->border); 906628Ssos scrn_blanked = 0; 9139428Ssos scp->status &= ~SAVER_RUNNING; 926628Ssos } 936628Ssos } 946628Ssos} 956628Ssos 9612276Sbdestatic int 9711857Speterstar_saver_load(struct lkm_table *lkmtp, int cmd) 986628Ssos{ 9927427Syokota return add_scrn_saver(star_saver); 1006628Ssos} 1016628Ssos 10212276Sbdestatic int 10311857Speterstar_saver_unload(struct lkm_table *lkmtp, int cmd) 1046628Ssos{ 10527427Syokota return remove_scrn_saver(star_saver); 1066628Ssos} 1076628Ssos 10812276Sbdeint 10911857Speterstar_saver_mod(struct lkm_table *lkmtp, int cmd, int ver) 1106628Ssos{ 11124674Sdufault MOD_DISPATCH(star_saver, lkmtp, cmd, ver, 11224674Sdufault star_saver_load, star_saver_unload, lkm_nullcmd); 1136628Ssos} 114