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 * $FreeBSD$ 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 u_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 sc_vtb_clear(&scp->scr, sc->scr_map[0x20], 73 (FG_LIGHTGREY | BG_BLACK) << 8); 74 vidd_set_hw_cursor(adp, -1, -1); 75 sc_set_border(scp, 0); 76 dirx = (scp->xpos ? 1 : -1); 77 diry = (scp->ypos ? 78 scp->xsize : -scp->xsize); 79 for (f=0; f< messagelen; f++) 80 savs[f] = scp->xpos + scp->ypos*scp->xsize; 81 sc_vtb_putc(&scp->scr, savs[0], sc->scr_map[*save], 82 (FG_LIGHTGREY | BG_BLACK) << 8); 83 blanked = 1; 84 } 85 if (blanked++ < 4) 86 return 0; 87 blanked = 1; 88 sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20], 89 (FG_LIGHTGREY | BG_BLACK) << 8); 90 for (f=messagelen-1; f > 0; f--) 91 savs[f] = savs[f-1]; 92 f = savs[0]; 93 if ((f % scp->xsize) == 0 || 94 (f % scp->xsize) == scp->xsize - 1 || 95 (random() % 50) == 0) 96 dirx = -dirx; 97 if ((f / scp->xsize) == 0 || 98 (f / scp->xsize) == scp->ysize - 1 || 99 (random() % 20) == 0) 100 diry = -diry; 101 savs[0] += dirx + diry; 102 for (f=messagelen-1; f>=0; f--) 103 sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]], 104 (FG_LIGHTGREY | BG_BLACK) << 8); 105 } else 106 blanked = 0; 107 108 return 0; 109 } 110 111 static int 112 snake_init(video_adapter_t *adp) 113 { 114 messagelen = strlen(ostype) + 1 + strlen(osrelease); 115 message = malloc(messagelen + 1, M_DEVBUF, M_WAITOK); 116 sprintf(message, "%s %s", ostype, osrelease); 117 messagep = malloc(messagelen * sizeof *messagep, M_DEVBUF, M_WAITOK); 118 return 0; 119 } 120 121 static int 122 snake_term(video_adapter_t *adp) 123 { 124 free(message, M_DEVBUF); 125 free(messagep, M_DEVBUF); 126 return 0; 127 } 128 129 static scrn_saver_t snake_module = { 130 "snake_saver", snake_init, snake_term, snake_saver, NULL, 131 }; 132 133 SAVER_MODULE(snake_saver, snake_module); 134