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 * $FreeBSD: src/sys/modules/syscons/snake/snake_saver.c,v 1.26.2.2 2001/05/06 05:44:29 nyan Exp $ 29 * $DragonFly: src/sys/dev/misc/syscons/snake/snake_saver.c,v 1.2 2003/06/17 04:28:47 dillon Exp $ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/module.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/sysctl.h> 38 #include <sys/consio.h> 39 #include <sys/fbio.h> 40 41 #include <machine/pc/display.h> 42 43 #include <dev/fb/fbreg.h> 44 #include <dev/fb/splashreg.h> 45 #include <dev/syscons/syscons.h> 46 47 #ifdef PC98 48 #include <pc98/pc98/pc98_machdep.h> 49 #endif 50 51 static u_char *message; 52 static int *messagep; 53 static int messagelen; 54 static int blanked; 55 56 static int 57 snake_saver(video_adapter_t *adp, int blank) 58 { 59 static int dirx, diry; 60 int f; 61 sc_softc_t *sc; 62 scr_stat *scp; 63 64 /* XXX hack for minimal changes. */ 65 #define save message 66 #define savs messagep 67 68 sc = sc_find_softc(adp, NULL); 69 if (sc == NULL) 70 return EAGAIN; 71 scp = sc->cur_scp; 72 73 if (blank) { 74 if (adp->va_info.vi_flags & V_INFO_GRAPHICS) 75 return EAGAIN; 76 if (blanked <= 0) { 77 #ifdef PC98 78 if (epson_machine_id == 0x20) { 79 outb(0x43f, 0x42); 80 outb(0x0c17, inb(0xc17) & ~0x08); 81 outb(0x43f, 0x40); 82 } 83 #endif /* PC98 */ 84 sc_vtb_clear(&scp->scr, sc->scr_map[0x20], 85 (FG_LIGHTGREY | BG_BLACK) << 8); 86 (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1); 87 sc_set_border(scp, 0); 88 dirx = (scp->xpos ? 1 : -1); 89 diry = (scp->ypos ? 90 scp->xsize : -scp->xsize); 91 for (f=0; f< messagelen; f++) 92 savs[f] = scp->xpos + scp->ypos*scp->xsize; 93 sc_vtb_putc(&scp->scr, savs[0], sc->scr_map[*save], 94 (FG_LIGHTGREY | BG_BLACK) << 8); 95 blanked = 1; 96 } 97 if (blanked++ < 4) 98 return 0; 99 blanked = 1; 100 sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20], 101 (FG_LIGHTGREY | BG_BLACK) << 8); 102 for (f=messagelen-1; f > 0; f--) 103 savs[f] = savs[f-1]; 104 f = savs[0]; 105 if ((f % scp->xsize) == 0 || 106 (f % scp->xsize) == scp->xsize - 1 || 107 (random() % 50) == 0) 108 dirx = -dirx; 109 if ((f / scp->xsize) == 0 || 110 (f / scp->xsize) == scp->ysize - 1 || 111 (random() % 20) == 0) 112 diry = -diry; 113 savs[0] += dirx + diry; 114 for (f=messagelen-1; f>=0; f--) 115 sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]], 116 (FG_LIGHTGREY | BG_BLACK) << 8); 117 } 118 else { 119 #ifdef PC98 120 if (epson_machine_id == 0x20) { 121 outb(0x43f, 0x42); 122 outb(0x0c17, inb(0xc17) | 0x08); 123 outb(0x43f, 0x40); 124 } 125 #endif /* PC98 */ 126 blanked = 0; 127 } 128 return 0; 129 } 130 131 static int 132 snake_init(video_adapter_t *adp) 133 { 134 messagelen = strlen(ostype) + 1 + strlen(osrelease); 135 message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK); 136 sprintf(message, "%s %s", ostype, osrelease); 137 messagep = malloc(messagelen * sizeof *messagep, M_DEVBUF, M_WAITOK); 138 return 0; 139 } 140 141 static int 142 snake_term(video_adapter_t *adp) 143 { 144 free(message, M_DEVBUF); 145 free(messagep, M_DEVBUF); 146 return 0; 147 } 148 149 static scrn_saver_t snake_module = { 150 "snake_saver", snake_init, snake_term, snake_saver, NULL, 151 }; 152 153 SAVER_MODULE(snake_saver, snake_module); 154