vt_termcolors.c revision 262861 
1/*-
2 * Copyright (c) 2013 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Aleksandr Rybalko under sponsorship from the
6 * FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/10/sys/dev/vt/colors/vt_termcolors.c 256530 2013-10-15 12:54:47Z ray $
30 */
31
32#include <sys/param.h>
33
34#include <dev/vt/colors/vt_termcolors.h>
35
36static struct {
37	unsigned char r;	/* Red percentage value. */
38	unsigned char g;	/* Green percentage value. */
39	unsigned char b;	/* Blue percentage value. */
40} color_def[16] = {
41	{0,	0,	0},	/* black */
42	{0,	0,	50},	/* dark blue */
43	{0,	50,	0},	/* dark green */
44	{0,	50,	50},	/* dark cyan */
45	{50,	0,	0},	/* dark red */
46	{50,	0,	50},	/* dark magenta */
47	{50,	50,	0},	/* brown */
48	{75,	75,	75},	/* light gray */
49	{50,	50,	50},	/* dark gray */
50	{0,	0,	100},	/* light blue */
51	{0,	100,	0},	/* light green */
52	{0,	100,	100},	/* light cyan */
53	{100,	0,	0},	/* light red */
54	{100,	0,	100},	/* light magenta */
55	{100,	100,	0},	/* yellow */
56	{100,	100,	100},	/* white */
57};
58
59int
60vt_generate_vga_palette(uint32_t *palette, int format, uint32_t rmax, int roffset,
61    uint32_t gmax, int goffset, uint32_t bmax, int boffset)
62{
63	int i;
64
65#define	CF(_f, _i) ((_f ## max * color_def[(_i)]._f / 100) << _f ## offset)
66	for (i = 0; i < 16; i++) {
67		switch (format) {
68		case COLOR_FORMAT_VGA:
69			palette[i] = i;
70			break;
71		case COLOR_FORMAT_RGB:
72			palette[i] = CF(r, i) | CF(g, i) | CF(b, i);
73			break;
74		default:
75			return (ENODEV);
76		}
77	}
78#undef	CF
79	return (0);
80}
81