star_saver.c revision 48104 
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 *	$Id: star_saver.c,v 1.20 1999/02/05 12:40:16 des Exp $
29 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/module.h>
35#include <sys/consio.h>
36#include <sys/fbio.h>
37
38#include <machine/pc/display.h>
39
40#include <dev/fb/fbreg.h>
41#include <dev/fb/splashreg.h>
42#include <dev/syscons/syscons.h>
43
44#define NUM_STARS	50
45
46static int blanked;
47
48/*
49 * Alternate saver that got its inspiration from a well known utility
50 * package for an inferior^H^H^H^H^H^Hfamous OS.
51 */
52static int
53star_saver(video_adapter_t *adp, int blank)
54{
55	sc_softc_t	*sc;
56	scr_stat	*scp;
57	int		cell, i;
58	char 		pattern[] = {"...........++++***   "};
59#ifndef PC98
60	char		colors[] = {FG_DARKGREY, FG_LIGHTGREY,
61				    FG_WHITE, FG_LIGHTCYAN};
62#else
63	char		colors[] = {FG_BLUE, FG_LIGHTGREY,
64				    FG_LIGHTGREY, FG_CYAN};
65#endif /* PC98 */
66	static u_short 	stars[NUM_STARS][2];
67
68	sc = sc_find_softc(adp, NULL);
69	if (sc == NULL)
70		return EAGAIN;
71	scp = sc->cur_scp;
72
73	if (blank) {
74		if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
75			return EAGAIN;
76		if (!blanked) {
77#ifdef PC98
78			if (epson_machine_id == 0x20) {
79				outb(0x43f, 0x42);
80				outb(0x0c17, inb(0xc17) & ~0x08);
81				outb(0x43f, 0x40);
82			}
83#endif /* PC98 */
84			/* clear the screen and set the border color */
85			sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
86				     (FG_LIGHTGREY | BG_BLACK) << 8);
87			(*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
88			set_border(scp, 0);
89			blanked = TRUE;
90			for(i=0; i<NUM_STARS; i++) {
91				stars[i][0] =
92					random() % (scp->xsize*scp->ysize);
93				stars[i][1] = 0;
94			}
95		}
96		cell = random() % NUM_STARS;
97		sc_vtb_putc(&scp->scr, stars[cell][0],
98			    sc->scr_map[pattern[stars[cell][1]]],
99			    colors[random()%sizeof(colors)] << 8);
100		if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) {
101			stars[cell][0] = random() % (scp->xsize*scp->ysize);
102			stars[cell][1] = 0;
103		}
104	}
105	else {
106#ifdef PC98
107		if (epson_machine_id == 0x20) {
108			outb(0x43f, 0x42);
109			outb(0x0c17, inb(0xc17) | 0x08);
110			outb(0x43f, 0x40);
111		}
112#endif /* PC98 */
113		blanked = FALSE;
114	}
115	return 0;
116}
117
118static int
119star_init(video_adapter_t *adp)
120{
121	blanked = FALSE;
122	return 0;
123}
124
125static int
126star_term(video_adapter_t *adp)
127{
128	return 0;
129}
130
131static scrn_saver_t star_module = {
132	"star_saver", star_init, star_term, star_saver, NULL,
133};
134
135SAVER_MODULE(star_saver, star_module);
136