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 #ifdef MAX 45 #undef MAX 46 #endif 47 #define MAX 63 /* number of colors (in addition to black) */ 48 #define INCREMENT 4 /* increment between colors */ 49 50 #define RED(n) ((n) * 3 + 0) 51 #define GREEN(n) ((n) * 3 + 1) 52 #define BLUE(n) ((n) * 3 + 2) 53 54 static u_char *vid; 55 static int banksize, scrmode, bpsl, scrw, scrh; 56 static u_char rain_pal[768]; 57 static int blanked; 58 59 static void 60 rain_update(video_adapter_t *adp) 61 { 62 int i, t; 63 64 t = rain_pal[BLUE(MAX)]; 65 for (i = MAX; i > 1; i--) 66 rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)]; 67 rain_pal[BLUE(1)] = t; 68 load_palette(adp, rain_pal); 69 } 70 71 static int 72 rain_saver(video_adapter_t *adp, int blank) 73 { 74 int i, j, o, p, pl; 75 u_char temp; 76 77 if (blank) { 78 /* switch to graphics mode */ 79 if (blanked <= 0) { 80 pl = splhigh(); 81 set_video_mode(adp, scrmode); 82 load_palette(adp, rain_pal); 83 set_border(adp, 0); 84 blanked++; 85 vid = (u_char *)adp->va_window; 86 banksize = adp->va_window_size; 87 bpsl = adp->va_line_width; 88 splx(pl); 89 for (i = 0; i < bpsl*scrh; i += banksize) { 90 set_origin(adp, i); 91 if ((bpsl * scrh - i) < banksize) 92 bzero(vid, bpsl * scrh - i); 93 else 94 bzero(vid, banksize); 95 } 96 set_origin(adp, 0); 97 for (i = 0, o = 0, p = 0; i < scrw; i += 2, p += 2) { 98 if (p > banksize) { 99 p -= banksize; 100 o += banksize; 101 set_origin(adp, o); 102 } 103 vid[p] = 1 + (random() % MAX); 104 } 105 o = 0; p = 0; 106 for (j = 1; j < scrh; j++) 107 for (i = 0, p = bpsl * (j - 1) - o; i < scrw; i += 2, p+= 2) { 108 while (p > banksize) { 109 p -= banksize; 110 o += banksize; 111 } 112 set_origin(adp, o); 113 temp = (vid[p] < MAX) ? 1 + vid[p] : 1; 114 if (p + bpsl < banksize) { 115 vid[p + bpsl] = temp; 116 } else { 117 set_origin(adp, o + banksize); 118 vid[p + bpsl - banksize] = temp; 119 } 120 } 121 } 122 123 /* update display */ 124 rain_update(adp); 125 } else { 126 blanked = 0; 127 } 128 return (0); 129 } 130 131 static int 132 rain_init(video_adapter_t *adp) 133 { 134 video_info_t info; 135 int i; 136 137 if (!get_mode_info(adp, M_VGA_CG320, &info)) { 138 scrmode = M_VGA_CG320; 139 } else if (!get_mode_info(adp, M_PC98_PEGC640x480, &info)) { 140 scrmode = M_PC98_PEGC640x480; 141 } else if (!get_mode_info(adp, M_PC98_PEGC640x400, &info)) { 142 scrmode = M_PC98_PEGC640x400; 143 } else { 144 log(LOG_NOTICE, 145 "%s: the console does not support M_VGA_CG320\n", 146 SAVER_NAME); 147 return (ENODEV); 148 } 149 150 scrw = info.vi_width; 151 scrh = info.vi_height; 152 153 /* intialize the palette */ 154 for (i = 1; i < MAX; i++) 155 rain_pal[BLUE(i)] = rain_pal[BLUE(i - 1)] + INCREMENT; 156 157 return (0); 158 } 159 160 static int 161 rain_term(video_adapter_t *adp) 162 { 163 return (0); 164 } 165 166 static scrn_saver_t rain_module = { 167 SAVER_NAME, 168 rain_init, 169 rain_term, 170 rain_saver, 171 NULL 172 }; 173 174 SAVER_MODULE(rain_saver, rain_module); 175