fade_saver.c revision 331722 
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: stable/11/sys/dev/syscons/fade/fade_saver.c 331722 2018-03-29 02:50:57Z eadler $
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
42static u_char palette[256*3];
43
44static int
45fade_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
80static int
81fade_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
89static int
90fade_term(video_adapter_t *adp)
91{
92	return 0;
93}
94
95static scrn_saver_t fade_module = {
96	"fade_saver", fade_init, fade_term, fade_saver, NULL,
97};
98
99SAVER_MODULE(fade_saver, fade_module);
100