1 /*-
2 * Copyright (c) 1999 Brad Forschinger
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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/modules/syscons/fire/fire_saver.c,v 1.6.2.1 2000/05/10 14:01:23 obrien Exp $
27 * $DragonFly: src/sys/dev/misc/syscons/fire/fire_saver.c,v 1.4 2006/09/03 18:52:27 dillon Exp $
28 */
29
30 /*
31 * brad forschinger, 19990504 <retch@flag.blackened.net>
32 *
33 * written with much help from warp_saver.c
34 *
35 */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41 #include <sys/syslog.h>
42 #include <sys/consio.h>
43 #include <sys/fbio.h>
44 #include <sys/random.h>
45 #include <sys/thread.h>
46
47 #include <dev/video/fb/fbreg.h>
48 #include <dev/video/fb/splashreg.h>
49 #include "../syscons.h"
50
51 #define X_SIZE 320
52 #define Y_SIZE 200
53
54 static int blanked;
55 static u_char fire_pal[768];
56 static u_char buf[X_SIZE * (Y_SIZE + 1)];
57 static u_char *vid;
58
59 static int
fire_saver(video_adapter_t * adp,int blank)60 fire_saver(video_adapter_t *adp, int blank)
61 {
62 int x, y;
63
64 if (blank) {
65 if (blanked <= 0) {
66 int red, green, blue;
67 int palette_index;
68
69 set_video_mode(adp, M_VGA_CG320);
70
71 /* build and load palette */
72 red = green = blue = 0;
73 for (palette_index = 0; palette_index < 256; palette_index++) {
74 red++;
75 if (red > 128)
76 green += 2;
77
78 fire_pal[(palette_index * 3) + 0] = red;
79 fire_pal[(palette_index * 3) + 1] = green;
80 fire_pal[(palette_index * 3) + 2] = blue;
81 }
82 load_palette(adp, fire_pal);
83
84 blanked++;
85 vid = (u_char *) adp->va_window;
86 }
87 /* make a new bottom line */
88 for (x = 0, y = Y_SIZE; x < X_SIZE; x++)
89 buf[x + (y * X_SIZE)] = krandom() % 160 + 96;
90
91 /* fade the flames out */
92 for (y = 0; y < Y_SIZE; y++) {
93 for (x = 0; x < X_SIZE; x++) {
94 buf[x + (y * X_SIZE)] = (buf[(x + 0) + ((y + 0) * X_SIZE)] +
95 buf[(x - 1) + ((y + 1) * X_SIZE)] +
96 buf[(x + 0) + ((y + 1) * X_SIZE)] +
97 buf[(x + 1) + ((y + 1) * X_SIZE)]) / 4;
98 if (buf[x + (y * X_SIZE)] > 0)
99 buf[x + (y * X_SIZE)]--;
100 }
101 }
102
103 /* blit our buffer into video ram */
104 memcpy(vid, buf, X_SIZE * Y_SIZE);
105 } else {
106 blanked = 0;
107 }
108
109 return 0;
110 }
111
112 static int
fire_initialise(video_adapter_t * adp)113 fire_initialise(video_adapter_t *adp)
114 {
115 video_info_t info;
116
117 /* check that the console is capable of running in 320x200x256 */
118 if (get_mode_info(adp, M_VGA_CG320, &info)) {
119 log(LOG_NOTICE, "fire_saver: the console does not support M_VGA_CG320\n");
120 return (ENODEV);
121 }
122 blanked = 0;
123
124 return 0;
125 }
126
127 static int
fire_terminate(video_adapter_t * adp)128 fire_terminate(video_adapter_t *adp)
129 {
130 return 0;
131 }
132
133 static scrn_saver_t fire_module = {
134 "fire_saver", fire_initialise, fire_terminate, fire_saver, NULL
135 };
136
137 SAVER_MODULE(fire_saver, fire_module);
138