1 /*-
2 * (MPSAFE)
3 *
4 * Copyright (c) 1995-1998 Søren Schmidt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * $FreeBSD: src/sys/modules/syscons/snake/snake_saver.c,v 1.26.2.2 2001/05/06 05:44:29 nyan Exp $
31 * $DragonFly: src/sys/dev/misc/syscons/snake/snake_saver.c,v 1.8 2006/12/20 18:14:39 dillon Exp $
32 */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/module.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
39 #include <sys/sysctl.h>
40 #include <sys/consio.h>
41 #include <sys/fbio.h>
42 #include <sys/thread.h>
43
44 #include <machine/pc/display.h>
45
46 #include <dev/video/fb/fbreg.h>
47 #include <dev/video/fb/splashreg.h>
48 #include "../syscons.h"
49
50 static u_char *message;
51 static int *messagep;
52 static int messagelen;
53 static int blanked;
54
55 static int
snake_saver(video_adapter_t * adp,int blank)56 snake_saver(video_adapter_t *adp, int blank)
57 {
58 static int dirx, diry;
59 int f;
60 sc_softc_t *sc;
61 scr_stat *scp;
62
63 /* XXX hack for minimal changes. */
64 #define save message
65 #define savs messagep
66
67
68 sc = sc_find_softc(adp, NULL);
69 if (sc == NULL) {
70 return EAGAIN;
71 }
72 scp = sc->cur_scp;
73
74 if (blank) {
75 if (adp->va_info.vi_flags & V_INFO_GRAPHICS) {
76 return EAGAIN;
77 }
78 if (blanked <= 0) {
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 sc_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 }
95 blanked = 1;
96 sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20],
97 (FG_LIGHTGREY | BG_BLACK) << 8);
98 for (f=messagelen-1; f > 0; f--)
99 savs[f] = savs[f-1];
100 f = savs[0];
101 if ((f % scp->xsize) == 0 ||
102 (f % scp->xsize) == scp->xsize - 1 ||
103 (krandom() % 50) == 0)
104 dirx = -dirx;
105 if ((f / scp->xsize) == 0 ||
106 (f / scp->xsize) == scp->ysize - 1 ||
107 (krandom() % 20) == 0)
108 diry = -diry;
109 savs[0] += dirx + diry;
110 for (f=messagelen-1; f>=0; f--)
111 sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]],
112 (FG_LIGHTGREY | BG_BLACK) << 8);
113 } else {
114 blanked = 0;
115 }
116
117 return 0;
118 }
119
120 static int
snake_init(video_adapter_t * adp)121 snake_init(video_adapter_t *adp)
122 {
123 messagelen = strlen(ostype) + 1 + strlen(osrelease);
124 message = kmalloc(messagelen + 1, M_SYSCONS, M_WAITOK);
125 ksprintf(message, "%s %s", ostype, osrelease);
126 messagep = kmalloc(messagelen * sizeof *messagep, M_SYSCONS, M_WAITOK);
127 return 0;
128 }
129
130 static int
snake_term(video_adapter_t * adp)131 snake_term(video_adapter_t *adp)
132 {
133 kfree(message, M_SYSCONS);
134 kfree(messagep, M_SYSCONS);
135 return 0;
136 }
137
138 static scrn_saver_t snake_module = {
139 "snake_saver", snake_init, snake_term, snake_saver, NULL,
140 };
141
142 SAVER_MODULE(snake_saver, snake_module);
143