xref: /freebsd/sys/dev/syscons/fade/fade_saver.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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  * $FreeBSD$
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 <dev/fb/fbreg.h>
39 #include <dev/fb/splashreg.h>
40 #include <dev/syscons/syscons.h>
41 
42 static u_char palette[256*3];
43 
44 static int
45 fade_saver(video_adapter_t *adp, int blank)
46 {
47 	static int count = 0;
48 	u_char pal[256*3];
49 	int i;
50 
51 	if (blank) {
52 		if (ISPALAVAIL(adp->va_flags)) {
53 			if (count <= 0)
54 				vidd_save_palette(adp, palette);
55 			if (count < 256) {
56 				pal[0] = pal[1] = pal[2] = 0;
57 				for (i = 3; i < 256*3; i++) {
58 					if (palette[i] - count > 60)
59 						pal[i] = palette[i] - count;
60 					else
61 						pal[i] = 60;
62 				}
63 				vidd_load_palette(adp, pal);
64 				count++;
65 			}
66 		} else {
67 	    		vidd_blank_display(adp, V_DISPLAY_BLANK);
68 		}
69 	} else {
70 		if (ISPALAVAIL(adp->va_flags)) {
71 			vidd_load_palette(adp, palette);
72 			count = 0;
73 		} else {
74 	    		vidd_blank_display(adp, V_DISPLAY_ON);
75 		}
76 	}
77 	return 0;
78 }
79 
80 static int
81 fade_init(video_adapter_t *adp)
82 {
83 	if (!ISPALAVAIL(adp->va_flags) &&
84 	    vidd_blank_display(adp, V_DISPLAY_ON) != 0)
85 		return ENODEV;
86 	return 0;
87 }
88 
89 static int
90 fade_term(video_adapter_t *adp)
91 {
92 	return 0;
93 }
94 
95 static scrn_saver_t fade_module = {
96 	"fade_saver", fade_init, fade_term, fade_saver, NULL,
97 };
98 
99 SAVER_MODULE(fade_saver, fade_module);
100