2 * Copyright (c) 1995-1998 Søren Schmidt
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
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 1.7 2006/09/05 00:55:39 dillon Exp $
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>
41 #include <machine/pc/display.h>
43 #include <dev/video/fb/fbreg.h>
44 #include <dev/video/fb/splashreg.h>
45 #include "../syscons.h"
47 static u_char *message;
49 static int messagelen;
53 snake_saver(video_adapter_t *adp, int blank)
55 static int dirx, diry;
60 /* XXX hack for minimal changes. */
64 sc = sc_find_softc(adp, NULL);
70 if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
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);
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);
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--)
94 if ((f % scp->xsize) == 0 ||
95 (f % scp->xsize) == scp->xsize - 1 ||
96 (krandom() % 50) == 0)
98 if ((f / scp->xsize) == 0 ||
99 (f / scp->xsize) == scp->ysize - 1 ||
100 (krandom() % 20) == 0)
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);
113 snake_init(video_adapter_t *adp)
115 messagelen = strlen(ostype) + 1 + strlen(osrelease);
116 message = kmalloc(messagelen + 1, M_SYSCONS, M_WAITOK);
117 sprintf(message, "%s %s", ostype, osrelease);
118 messagep = kmalloc(messagelen * sizeof *messagep, M_SYSCONS, M_WAITOK);
123 snake_term(video_adapter_t *adp)
125 kfree(message, M_SYSCONS);
126 kfree(messagep, M_SYSCONS);
130 static scrn_saver_t snake_module = {
131 "snake_saver", snake_init, snake_term, snake_saver, NULL,
134 SAVER_MODULE(snake_saver, snake_module);