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 1.7 2006/09/03 18:52:28 dillon 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 #include <sys/thread2.h> 41 42 #include <dev/video/fb/fbreg.h> 43 #include <dev/video/fb/splashreg.h> 44 #include "../syscons.h" 45 46 static u_char *vid; 47 48 #define SCRW 320 49 #define SCRH 200 50 #define RAINMAX 63 51 52 static u_char rain_pal[768]; 53 static int blanked; 54 55 static void 56 rain_update(video_adapter_t *adp) 57 { 58 int i, t; 59 60 t = rain_pal[(RAINMAX*3+2)]; 61 for (i = (RAINMAX*3+2); i > 5; i -= 3) 62 rain_pal[i] = rain_pal[i-3]; 63 rain_pal[5] = t; 64 load_palette(adp, rain_pal); 65 } 66 67 static int 68 rain_saver(video_adapter_t *adp, int blank) 69 { 70 int i, j, k; 71 72 if (blank) { 73 /* switch to graphics mode */ 74 if (blanked <= 0) { 75 crit_enter(); 76 set_video_mode(adp, M_VGA_CG320); 77 load_palette(adp, rain_pal); 78 #if 0 /* XXX conflict */ 79 set_border(adp, 0); 80 #endif 81 blanked++; 82 vid = (u_char *)adp->va_window; 83 crit_exit(); 84 bzero(vid, SCRW*SCRH); 85 for (i = 0; i < SCRW; i += 2) 86 vid[i] = 1 + (krandom() % RAINMAX); 87 for (j = 1, k = SCRW; j < SCRH; j++) 88 for (i = 0; i < SCRW; i += 2, k += 2) 89 vid[k] = (vid[k-SCRW] < RAINMAX) ? 1 + vid[k-SCRW] : 1; 90 } 91 92 /* update display */ 93 rain_update(adp); 94 95 } else { 96 blanked = 0; 97 } 98 return 0; 99 } 100 101 static int 102 rain_init(video_adapter_t *adp) 103 { 104 video_info_t info; 105 int i; 106 107 /* check that the console is capable of running in 320x200x256 */ 108 if (get_mode_info(adp, M_VGA_CG320, &info)) { 109 log(LOG_NOTICE, "rain_saver: the console does not support M_VGA_CG320\n"); 110 return ENODEV; 111 } 112 113 /* intialize the palette */ 114 for (i = 3; i < (RAINMAX+1)*3; i += 3) 115 rain_pal[i+2] = rain_pal[i-1] + 4; 116 117 blanked = 0; 118 119 return 0; 120 } 121 122 static int 123 rain_term(video_adapter_t *adp) 124 { 125 return 0; 126 } 127 128 static scrn_saver_t rain_module = { 129 "rain_saver", rain_init, rain_term, rain_saver, NULL, 130 }; 131 132 SAVER_MODULE(rain_saver, rain_module); 133