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 MAX 63 /* number of colors (in addition to black) */ 45 #define INCREMENT 4 /* increment between colors */ 46 47 #define RED(n) ((n) * 3 + 0) 48 #define GREEN(n) ((n) * 3 + 1) 49 #define BLUE(n) ((n) * 3 + 2) 50 51 static u_char *vid; 52 static int banksize, scrmode, bpsl, scrw, scrh; 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[BLUE(MAX)]; 62 for (i = MAX; i > 1; i--) 63 rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)]; 64 rain_pal[BLUE(1)] = 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, o, p, pl; 72 u_char temp; 73 74 if (blank) { 75 /* switch to graphics mode */ 76 if (blanked <= 0) { 77 pl = splhigh(); 78 set_video_mode(adp, scrmode); 79 load_palette(adp, rain_pal); 80 set_border(adp, 0); 81 blanked++; 82 vid = (u_char *)adp->va_window; 83 banksize = adp->va_window_size; 84 bpsl = adp->va_line_width; 85 splx(pl); 86 for (i = 0; i < bpsl*scrh; i += banksize) { 87 set_origin(adp, i); 88 if ((bpsl * scrh - i) < banksize) 89 bzero(vid, bpsl * scrh - i); 90 else 91 bzero(vid, banksize); 92 } 93 set_origin(adp, 0); 94 for (i = 0, o = 0, p = 0; i < scrw; i += 2, p += 2) { 95 if (p > banksize) { 96 p -= banksize; 97 o += banksize; 98 set_origin(adp, o); 99 } 100 vid[p] = 1 + (random() % MAX); 101 } 102 o = 0; p = 0; 103 for (j = 1; j < scrh; j++) 104 for (i = 0, p = bpsl * (j - 1) - o; i < scrw; i += 2, p+= 2) { 105 while (p > banksize) { 106 p -= banksize; 107 o += banksize; 108 } 109 set_origin(adp, o); 110 temp = (vid[p] < MAX) ? 1 + vid[p] : 1; 111 if (p + bpsl < banksize) { 112 vid[p + bpsl] = temp; 113 } else { 114 set_origin(adp, o + banksize); 115 vid[p + bpsl - banksize] = temp; 116 } 117 } 118 } 119 120 /* update display */ 121 rain_update(adp); 122 } else { 123 blanked = 0; 124 } 125 return (0); 126 } 127 128 static int 129 rain_init(video_adapter_t *adp) 130 { 131 video_info_t info; 132 int i; 133 134 if (!get_mode_info(adp, M_VGA_CG320, &info)) { 135 scrmode = M_VGA_CG320; 136 } else if (!get_mode_info(adp, M_PC98_PEGC640x480, &info)) { 137 scrmode = M_PC98_PEGC640x480; 138 } else if (!get_mode_info(adp, M_PC98_PEGC640x400, &info)) { 139 scrmode = M_PC98_PEGC640x400; 140 } else { 141 log(LOG_NOTICE, 142 "%s: the console does not support M_VGA_CG320\n", 143 SAVER_NAME); 144 return (ENODEV); 145 } 146 147 scrw = info.vi_width; 148 scrh = info.vi_height; 149 150 /* intialize the palette */ 151 for (i = 1; i < MAX; i++) 152 rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)] + INCREMENT; 153 154 return (0); 155 } 156 157 static int 158 rain_term(video_adapter_t *adp) 159 { 160 return (0); 161 } 162 163 static scrn_saver_t rain_module = { 164 SAVER_NAME, 165 rain_init, 166 rain_term, 167 rain_saver, 168 NULL 169 }; 170 171 SAVER_MODULE(rain_saver, rain_module); 172