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 1.5 2005/03/28 21:30:23 swildner 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/video/fb/fbreg.h> 44 #include <dev/video/fb/splashreg.h> 45 #include "../syscons.h" 46 47 static u_char *message; 48 static int *messagep; 49 static int messagelen; 50 static int blanked; 51 52 static int 53 snake_saver(video_adapter_t *adp, int blank) 54 { 55 static int dirx, diry; 56 int f; 57 sc_softc_t *sc; 58 scr_stat *scp; 59 60 /* XXX hack for minimal changes. */ 61 #define save message 62 #define savs messagep 63 64 sc = sc_find_softc(adp, NULL); 65 if (sc == NULL) 66 return EAGAIN; 67 scp = sc->cur_scp; 68 69 if (blank) { 70 if (adp->va_info.vi_flags & V_INFO_GRAPHICS) 71 return EAGAIN; 72 if (blanked <= 0) { 73 sc_vtb_clear(&scp->scr, sc->scr_map[0x20], 74 (FG_LIGHTGREY | BG_BLACK) << 8); 75 (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1); 76 sc_set_border(scp, 0); 77 dirx = (scp->xpos ? 1 : -1); 78 diry = (scp->ypos ? 79 scp->xsize : -scp->xsize); 80 for (f=0; f< messagelen; f++) 81 savs[f] = scp->xpos + scp->ypos*scp->xsize; 82 sc_vtb_putc(&scp->scr, savs[0], sc->scr_map[*save], 83 (FG_LIGHTGREY | BG_BLACK) << 8); 84 blanked = 1; 85 } 86 if (blanked++ < 4) 87 return 0; 88 blanked = 1; 89 sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20], 90 (FG_LIGHTGREY | BG_BLACK) << 8); 91 for (f=messagelen-1; f > 0; f--) 92 savs[f] = savs[f-1]; 93 f = savs[0]; 94 if ((f % scp->xsize) == 0 || 95 (f % scp->xsize) == scp->xsize - 1 || 96 (random() % 50) == 0) 97 dirx = -dirx; 98 if ((f / scp->xsize) == 0 || 99 (f / scp->xsize) == scp->ysize - 1 || 100 (random() % 20) == 0) 101 diry = -diry; 102 savs[0] += dirx + diry; 103 for (f=messagelen-1; f>=0; f--) 104 sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]], 105 (FG_LIGHTGREY | BG_BLACK) << 8); 106 } else 107 blanked = 0; 108 109 return 0; 110 } 111 112 static int 113 snake_init(video_adapter_t *adp) 114 { 115 messagelen = strlen(ostype) + 1 + strlen(osrelease); 116 message = malloc(messagelen + 1, M_SYSCONS, M_WAITOK); 117 sprintf(message, "%s %s", ostype, osrelease); 118 messagep = malloc(messagelen * sizeof *messagep, M_SYSCONS, M_WAITOK); 119 return 0; 120 } 121 122 static int 123 snake_term(video_adapter_t *adp) 124 { 125 free(message, M_SYSCONS); 126 free(messagep, M_SYSCONS); 127 return 0; 128 } 129 130 static scrn_saver_t snake_module = { 131 "snake_saver", snake_init, snake_term, snake_saver, NULL, 132 }; 133 134 SAVER_MODULE(snake_saver, snake_module); 135