2169df2b9baa0b8f8774fd1f65cfbce3c609afbb
[dragonfly.git] / sys / dev / misc / syscons / fade / fade_saver.c
1 /*-
2  * (MPSAFE)
3  *
4  * Copyright (c) 1995-1998 Søren Schmidt
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer,
12  *    without modification, immediately at the beginning of the file.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  * $FreeBSD: src/sys/modules/syscons/fade/fade_saver.c,v 1.18 1999/08/28 00:47:47 peter Exp $
31  * $DragonFly: src/sys/dev/misc/syscons/fade/fade_saver.c,v 1.4 2007/08/15 19:31:11 swildner Exp $
32  */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/consio.h>
39 #include <sys/fbio.h>
40 #include <sys/thread.h>
41
42 #include <dev/video/fb/fbreg.h>
43 #include <dev/video/fb/splashreg.h>
44 #include "../syscons.h"
45
46 static u_char palette[256*3];
47 static int blanked;
48
49 static int
50 fade_saver(video_adapter_t *adp, int blank)
51 {
52         static int count = 0;
53         u_char pal[256*3];
54         int i;
55
56
57         if (blank) {
58                 blanked = TRUE;
59                 if (ISPALAVAIL(adp->va_flags)) {
60                         if (count <= 0)
61                                 save_palette(adp, palette);
62                         if (count < 256) {
63                                 pal[0] = pal[1] = pal[2] = 0;
64                                 for (i = 3; i < 256*3; i++) {
65                                         if (palette[i] - count > 60)
66                                                 pal[i] = palette[i] - count;
67                                         else
68                                                 pal[i] = 60;
69                                 }
70                                 load_palette(adp, pal);
71                                 count++;
72                         }
73                 } else {
74                         (*vidsw[adp->va_index]->blank_display)(adp,
75                                                                V_DISPLAY_OFF);
76                 }
77         } else {
78                 if (ISPALAVAIL(adp->va_flags)) {
79                         load_palette(adp, palette);
80                         count = 0;
81                 } else {
82                         (*vidsw[adp->va_index]->blank_display)(adp,
83                                                                V_DISPLAY_ON);
84                 }
85                 blanked = FALSE;
86         }
87         return 0;
88 }
89
90 static int
91 fade_init(video_adapter_t *adp)
92 {
93         if (!ISPALAVAIL(adp->va_flags)
94             && (*vidsw[adp->va_index]->blank_display)(adp, V_DISPLAY_ON) != 0) {
95                 return ENODEV;
96         }
97         blanked = FALSE;
98         return 0;
99 }
100
101 static int
102 fade_term(video_adapter_t *adp)
103 {
104         return 0;
105 }
106
107 static scrn_saver_t fade_module = {
108         "fade_saver", fade_init, fade_term, fade_saver, NULL,
109 };
110
111 SAVER_MODULE(fade_saver, fade_module);