80e53ff6e7ea0bfdaefdb25f15c0f72c8cdcbfa2
[dragonfly.git] / sys / dev / misc / syscons / star / star_saver.c
1 /*-
2  * Copyright (c) 1995-1998 Søren 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/star/star_saver.c,v 1.23.2.2 2001/05/06 05:44:29 nyan Exp $
29  * $DragonFly: src/sys/dev/misc/syscons/star/star_saver.c,v 1.3 2003/08/15 08:32:30 dillon Exp $
30  */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/consio.h>
37 #include <sys/fbio.h>
38
39 #include <machine/pc/display.h>
40
41 #include <dev/video/fb/fbreg.h>
42 #include <dev/video/fb/splashreg.h>
43 #include "../syscons.h"
44
45 #ifdef PC98
46 #include <pc98/pc98/pc98_machdep.h>
47 #endif
48
49 #define NUM_STARS       50
50
51 static int blanked;
52
53 /*
54  * Alternate saver that got its inspiration from a well known utility
55  * package for an inferior^H^H^H^H^H^Hfamous OS.
56  */
57 static int
58 star_saver(video_adapter_t *adp, int blank)
59 {
60         sc_softc_t      *sc;
61         scr_stat        *scp;
62         int             cell, i;
63         static u_char   pattern[] = {"...........++++***   "};
64 #ifndef PC98
65         static char     colors[] = {FG_DARKGREY, FG_LIGHTGREY,
66                                     FG_WHITE, FG_LIGHTCYAN};
67 #else
68         static char     colors[] = {FG_BLUE, FG_LIGHTGREY,
69                                     FG_LIGHTGREY, FG_CYAN};
70 #endif /* PC98 */
71         static u_short  stars[NUM_STARS][2];
72
73         sc = sc_find_softc(adp, NULL);
74         if (sc == NULL)
75                 return EAGAIN;
76         scp = sc->cur_scp;
77
78         if (blank) {
79                 if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
80                         return EAGAIN;
81                 if (!blanked) {
82 #ifdef PC98
83                         if (epson_machine_id == 0x20) {
84                                 outb(0x43f, 0x42);
85                                 outb(0x0c17, inb(0xc17) & ~0x08);
86                                 outb(0x43f, 0x40);
87                         }
88 #endif /* PC98 */
89                         /* clear the screen and set the border color */
90                         sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
91                                      (FG_LIGHTGREY | BG_BLACK) << 8);
92                         (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
93                         sc_set_border(scp, 0);
94                         blanked = TRUE;
95                         for(i=0; i<NUM_STARS; i++) {
96                                 stars[i][0] =
97                                         random() % (scp->xsize*scp->ysize);
98                                 stars[i][1] = 0;
99                         }
100                 }
101                 cell = random() % NUM_STARS;
102                 sc_vtb_putc(&scp->scr, stars[cell][0], 
103                             sc->scr_map[pattern[stars[cell][1]]],
104                             colors[random()%sizeof(colors)] << 8);
105                 if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) {
106                         stars[cell][0] = random() % (scp->xsize*scp->ysize);
107                         stars[cell][1] = 0;
108                 }
109         }
110         else {
111 #ifdef PC98
112                 if (epson_machine_id == 0x20) {
113                         outb(0x43f, 0x42);
114                         outb(0x0c17, inb(0xc17) | 0x08);
115                         outb(0x43f, 0x40);
116                 }
117 #endif /* PC98 */
118                 blanked = FALSE;
119         }
120         return 0;
121 }
122
123 static int
124 star_init(video_adapter_t *adp)
125 {
126         blanked = FALSE;
127         return 0;
128 }
129
130 static int
131 star_term(video_adapter_t *adp)
132 {
133         return 0;
134 }
135
136 static scrn_saver_t star_module = {
137         "star_saver", star_init, star_term, star_saver, NULL,
138 };
139
140 SAVER_MODULE(star_saver, star_module);