star_saver.c revision 174985 
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: head/sys/dev/syscons/star/star_saver.c 174985 2007-12-29 23:26:59Z wkoszek $
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	static u_char	pattern[] = {"...........++++***   "};
59	static char	color16[] = {FG_DARKGREY, FG_LIGHTGREY,
60				     FG_WHITE, FG_LIGHTCYAN};
61	static char	color8[] = {FG_BLUE, FG_BROWN,
62				    FG_LIGHTGREY, FG_CYAN};
63	static char	*colors;
64	static u_short 	stars[NUM_STARS][2];
65
66	sc = sc_find_softc(adp, NULL);
67	if (sc == NULL)
68		return EAGAIN;
69	scp = sc->cur_scp;
70
71	if (blank) {
72		if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
73			return EAGAIN;
74		if (!blanked) {
75			switch (adp->va_mode) {
76			case M_PC98_80x25:
77			case M_PC98_80x30:
78				colors = color8;
79				break;
80			default:
81				colors = color16;
82				break;
83			}
84
85			/* clear the screen and set the border color */
86			sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
87				     (FG_LIGHTGREY | BG_BLACK) << 8);
88			vidd_set_hw_cursor(adp, -1, -1);
89			sc_set_border(scp, 0);
90			blanked = TRUE;
91			for(i=0; i<NUM_STARS; i++) {
92				stars[i][0] =
93					random() % (scp->xsize*scp->ysize);
94				stars[i][1] = 0;
95			}
96		}
97		cell = random() % NUM_STARS;
98		sc_vtb_putc(&scp->scr, stars[cell][0],
99			    sc->scr_map[pattern[stars[cell][1]]],
100			    colors[random()%sizeof(color16)] << 8);
101		if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) {
102			stars[cell][0] = random() % (scp->xsize*scp->ysize);
103			stars[cell][1] = 0;
104		}
105	} else
106		blanked = FALSE;
107
108	return 0;
109}
110
111static int
112star_init(video_adapter_t *adp)
113{
114	blanked = FALSE;
115	return 0;
116}
117
118static int
119star_term(video_adapter_t *adp)
120{
121	return 0;
122}
123
124static scrn_saver_t star_module = {
125	"star_saver", star_init, star_term, star_saver, NULL,
126};
127
128SAVER_MODULE(star_saver, star_module);
129