1 /*-
2 * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
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 * in this position and unchanged.
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/rain/rain_saver.c,v 1.5.2.1 2000/05/10 16:26:47 obrien Exp $
29 * $DragonFly: src/sys/dev/misc/syscons/rain/rain_saver.c,v 1.7 2006/09/03 18:52:28 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/syslog.h>
37 #include <sys/consio.h>
38 #include <sys/fbio.h>
39 #include <sys/random.h>
40 #include <sys/thread.h>
41 #include <sys/thread2.h>
42
43 #include <dev/video/fb/fbreg.h>
44 #include <dev/video/fb/splashreg.h>
45 #include "../syscons.h"
46
47 static u_char *vid;
48
49 #define SCRW 320
50 #define SCRH 200
51 #define RAINMAX 63
52
53 static u_char rain_pal[768];
54 static int blanked;
55
56 static void
rain_update(video_adapter_t * adp)57 rain_update(video_adapter_t *adp)
58 {
59 int i, t;
60
61 t = rain_pal[(RAINMAX*3+2)];
62 for (i = (RAINMAX*3+2); i > 5; i -= 3)
63 rain_pal[i] = rain_pal[i-3];
64 rain_pal[5] = t;
65 load_palette(adp, rain_pal);
66 }
67
68 static int
rain_saver(video_adapter_t * adp,int blank)69 rain_saver(video_adapter_t *adp, int blank)
70 {
71 int i, j, k;
72
73 if (blank) {
74 /* switch to graphics mode */
75 if (blanked <= 0) {
76 crit_enter();
77 set_video_mode(adp, M_VGA_CG320);
78 load_palette(adp, rain_pal);
79 #if 0 /* XXX conflict */
80 set_border(adp, 0);
81 #endif
82 blanked++;
83 vid = (u_char *)adp->va_window;
84 crit_exit();
85 bzero(vid, SCRW*SCRH);
86 for (i = 0; i < SCRW; i += 2)
87 vid[i] = 1 + (krandom() % RAINMAX);
88 for (j = 1, k = SCRW; j < SCRH; j++)
89 for (i = 0; i < SCRW; i += 2, k += 2)
90 vid[k] = (vid[k-SCRW] < RAINMAX) ? 1 + vid[k-SCRW] : 1;
91 }
92
93 /* update display */
94 rain_update(adp);
95
96 } else {
97 blanked = 0;
98 }
99 return 0;
100 }
101
102 static int
rain_init(video_adapter_t * adp)103 rain_init(video_adapter_t *adp)
104 {
105 video_info_t info;
106 int i;
107
108 /* check that the console is capable of running in 320x200x256 */
109 if (get_mode_info(adp, M_VGA_CG320, &info)) {
110 log(LOG_NOTICE, "rain_saver: the console does not support M_VGA_CG320\n");
111 return ENODEV;
112 }
113
114 /* intialize the palette */
115 for (i = 3; i < (RAINMAX+1)*3; i += 3)
116 rain_pal[i+2] = rain_pal[i-1] + 4;
117
118 blanked = 0;
119
120 return 0;
121 }
122
123 static int
rain_term(video_adapter_t * adp)124 rain_term(video_adapter_t *adp)
125 {
126 return 0;
127 }
128
129 static scrn_saver_t rain_module = {
130 "rain_saver", rain_init, rain_term, rain_saver, NULL,
131 };
132
133 SAVER_MODULE(rain_saver, rain_module);
134