1 /*- 2 * Copyright (c) 1998 Dag-Erling Co�dan Sm�rgrav 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 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: rain_saver.c,v 1.2 1999/01/11 03:18:50 yokota Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/syslog.h> 36 37 #include <machine/random.h> 38 39 #include <saver.h> 40 41 static u_char *vid; 42 43 #define SCRW 320 44 #define SCRH 200 45 #define MAX 63 46 47 static u_char rain_pal[768]; 48 static int blanked; 49 50 static void 51 rain_update(video_adapter_t *adp) 52 { 53 int i, t; 54 55 t = rain_pal[(MAX*3+2)]; 56 for (i = (MAX*3+2); i > 5; i -= 3) 57 rain_pal[i] = rain_pal[i-3]; 58 rain_pal[5] = t; 59 load_palette(adp, rain_pal); 60 } 61 62 static int 63 rain_saver(video_adapter_t *adp, int blank) 64 { 65 int i, j, k, pl; 66 67 if (blank) { 68 /* switch to graphics mode */ 69 if (blanked <= 0) { 70 pl = splhigh(); 71 set_video_mode(adp, M_VGA_CG320); 72 load_palette(adp, rain_pal); 73 #if 0 /* XXX conflict */ 74 set_border(adp, 0); 75 #endif 76 blanked++; 77 vid = (u_char *)adp->va_window; 78 splx(pl); 79 bzero(vid, SCRW*SCRH); 80 for (i = 0; i < SCRW; i += 2) 81 vid[i] = 1 + (random() % MAX); 82 for (j = 1, k = SCRW; j < SCRH; j++) 83 for (i = 0; i < SCRW; i += 2, k += 2) 84 vid[k] = (vid[k-SCRW] < MAX) ? 1 + vid[k-SCRW] : 1; 85 } 86 87 /* update display */ 88 rain_update(adp); 89 90 } else { 91 blanked = 0; 92 } 93 return 0; 94 } 95 96 static int 97 rain_init(video_adapter_t *adp) 98 { 99 video_info_t info; 100 int i; 101 102 /* check that the console is capable of running in 320x200x256 */ 103 if (get_mode_info(adp, M_VGA_CG320, &info)) { 104 log(LOG_NOTICE, "rain_saver: the console does not support M_VGA_CG320\n"); 105 return ENODEV; 106 } 107 108 /* intialize the palette */ 109 for (i = 3; i < (MAX+1)*3; i += 3) 110 rain_pal[i+2] = rain_pal[i-1] + 4; 111 112 blanked = 0; 113 114 return 0; 115 } 116 117 static int 118 rain_term(video_adapter_t *adp) 119 { 120 return 0; 121 } 122 123 static scrn_saver_t rain_module = { 124 "rain_saver", rain_init, rain_term, rain_saver, NULL, 125 }; 126 127 SAVER_MODULE(rain_saver, rain_module); 128