1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1995-1998 S��ren 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 * $FreeBSD$
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37#include <sys/consio.h>
38#include <sys/fbio.h>
39
40#include <dev/fb/fbreg.h>
41#include <dev/fb/splashreg.h>
42#include <dev/syscons/syscons.h>
43
44static u_char palette[256*3];
45
46static int
47fade_saver(video_adapter_t *adp, int blank)
48{
49	static int count = 0;
50	u_char pal[256*3];
51	int i;
52
53	if (blank) {
54		if (ISPALAVAIL(adp->va_flags)) {
55			if (count <= 0)
56				vidd_save_palette(adp, palette);
57			if (count < 256) {
58				pal[0] = pal[1] = pal[2] = 0;
59				for (i = 3; i < 256*3; i++) {
60					if (palette[i] - count > 60)
61						pal[i] = palette[i] - count;
62					else
63						pal[i] = 60;
64				}
65				vidd_load_palette(adp, pal);
66				count++;
67			}
68		} else {
69	    		vidd_blank_display(adp, V_DISPLAY_BLANK);
70		}
71	} else {
72		if (ISPALAVAIL(adp->va_flags)) {
73			vidd_load_palette(adp, palette);
74			count = 0;
75		} else {
76	    		vidd_blank_display(adp, V_DISPLAY_ON);
77		}
78	}
79	return 0;
80}
81
82static int
83fade_init(video_adapter_t *adp)
84{
85	if (!ISPALAVAIL(adp->va_flags) &&
86	    vidd_blank_display(adp, V_DISPLAY_ON) != 0)
87		return ENODEV;
88	return 0;
89}
90
91static int
92fade_term(video_adapter_t *adp)
93{
94	return 0;
95}
96
97static scrn_saver_t fade_module = {
98	"fade_saver", fade_init, fade_term, fade_saver, NULL,
99};
100
101SAVER_MODULE(fade_saver, fade_module);
102