1 /*- 2 * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav 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/thread.h> 41 #include <sys/thread2.h> 42 43 #include <dev/video/fb/fbreg.h> 44 #include <dev/video/fb/splashreg.h> 45 #include "../syscons.h" 46 47 static u_char *vid; 48 49 #define SCRW 320 50 #define SCRH 200 51 #define RAINMAX 63 52 53 static u_char rain_pal[768]; 54 static int blanked; 55 56 static void 57 rain_update(video_adapter_t *adp) 58 { 59 int i, t; 60 61 t = rain_pal[(RAINMAX*3+2)]; 62 for (i = (RAINMAX*3+2); i > 5; i -= 3) 63 rain_pal[i] = rain_pal[i-3]; 64 rain_pal[5] = t; 65 load_palette(adp, rain_pal); 66 } 67 68 static int 69 rain_saver(video_adapter_t *adp, int blank) 70 { 71 int i, j, k; 72 73 if (blank) { 74 /* switch to graphics mode */ 75 if (blanked <= 0) { 76 crit_enter(); 77 set_video_mode(adp, M_VGA_CG320); 78 load_palette(adp, rain_pal); 79 #if 0 /* XXX conflict */ 80 set_border(adp, 0); 81 #endif 82 blanked++; 83 vid = (u_char *)adp->va_window; 84 crit_exit(); 85 bzero(vid, SCRW*SCRH); 86 for (i = 0; i < SCRW; i += 2) 87 vid[i] = 1 + (krandom() % RAINMAX); 88 for (j = 1, k = SCRW; j < SCRH; j++) 89 for (i = 0; i < SCRW; i += 2, k += 2) 90 vid[k] = (vid[k-SCRW] < RAINMAX) ? 1 + vid[k-SCRW] : 1; 91 } 92 93 /* update display */ 94 rain_update(adp); 95 96 } else { 97 blanked = 0; 98 } 99 return 0; 100 } 101 102 static int 103 rain_init(video_adapter_t *adp) 104 { 105 video_info_t info; 106 int i; 107 108 /* check that the console is capable of running in 320x200x256 */ 109 if (get_mode_info(adp, M_VGA_CG320, &info)) { 110 log(LOG_NOTICE, "rain_saver: the console does not support M_VGA_CG320\n"); 111 return ENODEV; 112 } 113 114 /* intialize the palette */ 115 for (i = 3; i < (RAINMAX+1)*3; i += 3) 116 rain_pal[i+2] = rain_pal[i-1] + 4; 117 118 blanked = 0; 119 120 return 0; 121 } 122 123 static int 124 rain_term(video_adapter_t *adp) 125 { 126 return 0; 127 } 128 129 static scrn_saver_t rain_module = { 130 "rain_saver", rain_init, rain_term, rain_saver, NULL, 131 }; 132 133 SAVER_MODULE(rain_saver, rain_module); 134