1 /*- 2 * Copyright (c) 1995-1998 S�ren Schmidt 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 * without modification, immediately at the beginning of the file. 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 * $Id: snake_saver.c,v 1.23 1999/02/05 12:40:15 des Exp $ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/module.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/sysctl.h> 37 #include <sys/consio.h> 38 #include <sys/fbio.h> 39 40 #include <machine/pc/display.h> 41 42 #include <dev/fb/fbreg.h> 43 #include <dev/fb/splashreg.h> 44 #include <dev/syscons/syscons.h> 45 46 static char *message; 47 static int *messagep; 48 static int messagelen; 49 static int blanked; 50 51 static int 52 snake_saver(video_adapter_t *adp, int blank) 53 { 54 static int dirx, diry; 55 int f; 56 sc_softc_t *sc; 57 scr_stat *scp; 58 59 /* XXX hack for minimal changes. */ 60 #define save message 61 #define savs messagep 62 63 sc = sc_find_softc(adp, NULL); 64 if (sc == NULL) 65 return EAGAIN; 66 scp = sc->cur_scp; 67 68 if (blank) { 69 if (adp->va_info.vi_flags & V_INFO_GRAPHICS) 70 return EAGAIN; 71 if (blanked <= 0) { 72 #ifdef PC98 73 if (epson_machine_id == 0x20) { 74 outb(0x43f, 0x42); 75 outb(0x0c17, inb(0xc17) & ~0x08); 76 outb(0x43f, 0x40); 77 } 78 #endif /* PC98 */ 79 sc_vtb_clear(&scp->scr, sc->scr_map[0x20], 80 (FG_LIGHTGREY | BG_BLACK) << 8); 81 (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1); 82 set_border(scp, 0); 83 dirx = (scp->xpos ? 1 : -1); 84 diry = (scp->ypos ? 85 scp->xsize : -scp->xsize); 86 for (f=0; f< messagelen; f++) 87 savs[f] = scp->xpos + scp->ypos*scp->xsize; 88 sc_vtb_putc(&scp->scr, savs[0], sc->scr_map[*save], 89 (FG_LIGHTGREY | BG_BLACK) << 8); 90 blanked = 1; 91 } 92 if (blanked++ < 4) 93 return 0; 94 blanked = 1; 95 sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20], 96 (FG_LIGHTGREY | BG_BLACK) << 8); 97 for (f=messagelen-1; f > 0; f--) 98 savs[f] = savs[f-1]; 99 f = savs[0]; 100 if ((f % scp->xsize) == 0 || 101 (f % scp->xsize) == scp->xsize - 1 || 102 (random() % 50) == 0) 103 dirx = -dirx; 104 if ((f / scp->xsize) == 0 || 105 (f / scp->xsize) == scp->ysize - 1 || 106 (random() % 20) == 0) 107 diry = -diry; 108 savs[0] += dirx + diry; 109 for (f=messagelen-1; f>=0; f--) 110 sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]], 111 (FG_LIGHTGREY | BG_BLACK) << 8); 112 } 113 else { 114 #ifdef PC98 115 if (epson_machine_id == 0x20) { 116 outb(0x43f, 0x42); 117 outb(0x0c17, inb(0xc17) | 0x08); 118 outb(0x43f, 0x40); 119 } 120 #endif /* PC98 */ 121 blanked = 0; 122 } 123 return 0; 124 } 125 126 static int 127 snake_init(video_adapter_t *adp) 128 { 129 messagelen = strlen(ostype) + 1 + strlen(osrelease); 130 message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK); 131 sprintf(message, "%s %s", ostype, osrelease); 132 messagep = malloc(messagelen * sizeof *messagep, M_DEVBUF, M_WAITOK); 133 return 0; 134 } 135 136 static int 137 snake_term(video_adapter_t *adp) 138 { 139 free(message, M_DEVBUF); 140 free(messagep, M_DEVBUF); 141 return 0; 142 } 143 144 static scrn_saver_t snake_module = { 145 "snake_saver", snake_init, snake_term, snake_saver, NULL, 146 }; 147 148 SAVER_MODULE(snake_saver, snake_module); 149