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 * $FreeBSD: src/sys/modules/syscons/rain/rain_saver.c,v 1.5.2.1 2000/05/10 16:26:47 obrien Exp $ 29 * $DragonFly: src/sys/dev/misc/syscons/rain/rain_saver.c,v 1.3 2003/08/03 11:39:57 hmp Exp $ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/syslog.h> 37 #include <sys/consio.h> 38 #include <sys/fbio.h> 39 #include <sys/random.h> 40 41 #include <dev/fb/fbreg.h> 42 #include <dev/fb/splashreg.h> 43 #include <dev/syscons/syscons.h> 44 45 static u_char *vid; 46 47 #define SCRW 320 48 #define SCRH 200 49 #ifdef MAX 50 #undef MAX 51 #else 52 #define MAX 63 53 #endif 54 55 static u_char rain_pal[768]; 56 static int blanked; 57 58 static void 59 rain_update(video_adapter_t *adp) 60 { 61 int i, t; 62 63 t = rain_pal[(MAX*3+2)]; 64 for (i = (MAX*3+2); i > 5; i -= 3) 65 rain_pal[i] = rain_pal[i-3]; 66 rain_pal[5] = t; 67 load_palette(adp, rain_pal); 68 } 69 70 static int 71 rain_saver(video_adapter_t *adp, int blank) 72 { 73 int i, j, k, pl; 74 75 if (blank) { 76 /* switch to graphics mode */ 77 if (blanked <= 0) { 78 pl = splhigh(); 79 set_video_mode(adp, M_VGA_CG320); 80 load_palette(adp, rain_pal); 81 #if 0 /* XXX conflict */ 82 set_border(adp, 0); 83 #endif 84 blanked++; 85 vid = (u_char *)adp->va_window; 86 splx(pl); 87 bzero(vid, SCRW*SCRH); 88 for (i = 0; i < SCRW; i += 2) 89 vid[i] = 1 + (random() % MAX); 90 for (j = 1, k = SCRW; j < SCRH; j++) 91 for (i = 0; i < SCRW; i += 2, k += 2) 92 vid[k] = (vid[k-SCRW] < MAX) ? 1 + vid[k-SCRW] : 1; 93 } 94 95 /* update display */ 96 rain_update(adp); 97 98 } else { 99 blanked = 0; 100 } 101 return 0; 102 } 103 104 static int 105 rain_init(video_adapter_t *adp) 106 { 107 video_info_t info; 108 int i; 109 110 /* check that the console is capable of running in 320x200x256 */ 111 if (get_mode_info(adp, M_VGA_CG320, &info)) { 112 log(LOG_NOTICE, "rain_saver: the console does not support M_VGA_CG320\n"); 113 return ENODEV; 114 } 115 116 /* intialize the palette */ 117 for (i = 3; i < (MAX+1)*3; i += 3) 118 rain_pal[i+2] = rain_pal[i-1] + 4; 119 120 blanked = 0; 121 122 return 0; 123 } 124 125 static int 126 rain_term(video_adapter_t *adp) 127 { 128 return 0; 129 } 130 131 static scrn_saver_t rain_module = { 132 "rain_saver", rain_init, rain_term, rain_saver, NULL, 133 }; 134 135 SAVER_MODULE(rain_saver, rain_module); 136