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/warp/warp_saver.c,v 1.7.2.1 2000/05/10 16:26:47 obrien Exp $
29 * $DragonFly: src/sys/dev/misc/syscons/warp/warp_saver.c,v 1.5 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/thread2.h>
41 #include <sys/thread.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 static int blanked;
49
50 #define SCRW 320
51 #define SCRH 200
52 #define SPP 15
53 #define STARS (SPP*(1+2+4+8))
54
55 static int star[STARS];
56 static u_char warp_pal[768] = {
57 0x00, 0x00, 0x00,
58 0x66, 0x66, 0x66,
59 0x99, 0x99, 0x99,
60 0xcc, 0xcc, 0xcc,
61 0xff, 0xff, 0xff
62 /* the rest is zero-filled by the compiler */
63 };
64
65 static void
warp_update(void)66 warp_update(void)
67 {
68 int i, j, k, n;
69
70 for (i = 1, k = 0, n = SPP*8; i < 5; i++, n /= 2)
71 for (j = 0; j < n; j++, k++) {
72 vid[star[k]] = 0;
73 star[k] += i;
74 if (star[k] > SCRW*SCRH)
75 star[k] -= SCRW*SCRH;
76 vid[star[k]] = i;
77 }
78 }
79
80 static int
warp_saver(video_adapter_t * adp,int blank)81 warp_saver(video_adapter_t *adp, int blank)
82 {
83 if (blank) {
84 /* switch to graphics mode */
85 if (blanked <= 0) {
86 crit_enter();
87 set_video_mode(adp, M_VGA_CG320);
88 load_palette(adp, warp_pal);
89 #if 0 /* XXX conflict */
90 set_border(adp, 0);
91 #endif
92 blanked++;
93 vid = (u_char *)adp->va_window;
94 crit_exit();
95 bzero(vid, SCRW*SCRH);
96 }
97
98 /* update display */
99 warp_update();
100
101 } else {
102 blanked = 0;
103 }
104 return 0;
105 }
106
107 static int
warp_init(video_adapter_t * adp)108 warp_init(video_adapter_t *adp)
109 {
110 video_info_t info;
111 int i;
112
113 /* check that the console is capable of running in 320x200x256 */
114 if (get_mode_info(adp, M_VGA_CG320, &info)) {
115 log(LOG_NOTICE, "warp_saver: the console does not support M_VGA_CG320\n");
116 return ENODEV;
117 }
118
119 /* randomize the star field */
120 for (i = 0; i < STARS; i++) {
121 star[i] = krandom() % (SCRW*SCRH);
122 }
123
124 blanked = 0;
125
126 return 0;
127 }
128
129 static int
warp_term(video_adapter_t * adp)130 warp_term(video_adapter_t *adp)
131 {
132 return 0;
133 }
134
135 static scrn_saver_t warp_module = {
136 "warp_saver", warp_init, warp_term, warp_saver, NULL,
137 };
138
139 SAVER_MODULE(warp_saver, warp_module);
140