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