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 * $FreeBSD$ 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 39 #include <dev/fb/fbreg.h> 40 #include <dev/fb/splashreg.h> 41 #include <dev/syscons/syscons.h> 42 43 #define SAVER_NAME "rain_saver" 44 #define SCRW 320 45 #define SCRH 200 46 #define MAX 63 /* number of colors (in addition to black) */ 47 #define INCREMENT 4 /* increment between colors */ 48 49 #define RED(n) ((n) * 3 + 0) 50 #define GREEN(n) ((n) * 3 + 1) 51 #define BLUE(n) ((n) * 3 + 2) 52 53 static u_char *vid; 54 static u_char rain_pal[768]; 55 static int blanked; 56 57 static void 58 rain_update(video_adapter_t *adp) 59 { 60 int i, t; 61 62 t = rain_pal[BLUE(MAX)]; 63 for (i = MAX; i > 1; i--) 64 rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)]; 65 rain_pal[BLUE(1)] = t; 66 load_palette(adp, rain_pal); 67 } 68 69 static int 70 rain_saver(video_adapter_t *adp, int blank) 71 { 72 int i, j, k, pl; 73 74 if (blank) { 75 /* switch to graphics mode */ 76 if (blanked <= 0) { 77 pl = splhigh(); 78 set_video_mode(adp, M_VGA_CG320); 79 load_palette(adp, rain_pal); 80 set_border(adp, 0); 81 blanked++; 82 vid = (u_char *)adp->va_window; 83 splx(pl); 84 bzero(vid, SCRW * SCRH); 85 for (i = 0; i < SCRW; i += 2) 86 vid[i] = 1 + (random() % MAX); 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] < MAX) ? 90 1 + vid[k - SCRW] : 1; 91 } 92 93 /* update display */ 94 rain_update(adp); 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, 110 "%s: the console does not support M_VGA_CG320\n", 111 SAVER_NAME); 112 return (ENODEV); 113 } 114 115 /* intialize the palette */ 116 for (i = 1; i < MAX; i++) 117 rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)] + INCREMENT; 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 SAVER_NAME, 130 rain_init, 131 rain_term, 132 rain_saver, 133 NULL 134 }; 135 136 SAVER_MODULE(rain_saver, rain_module); 137