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Query the client terminal for foreground and background colours and if
OSC 10 or 11 is received but no colour has been set inside tmux, return
the colour from the first attached client (probably most people will
have all light or or all dark terminals).

/* $OpenBSD: colour.c,v 1.26 2023/01/03 11:43:24 nicm Exp $ */

/*
 * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
 * Copyright (c) 2016 Avi Halachmi <avihpit@yahoo.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include "tmux.h"

static int
colour_dist_sq(int R, int G, int B, int r, int g, int b)
{
	return ((R - r) * (R - r) + (G - g) * (G - g) + (B - b) * (B - b));
}

static int
colour_to_6cube(int v)
{
	if (v < 48)
		return (0);
	if (v < 114)
		return (1);
	return ((v - 35) / 40);
}

/*
 * Convert an RGB triplet to the xterm(1) 256 colour palette.
 *
 * xterm provides a 6x6x6 colour cube (16 - 231) and 24 greys (232 - 255). We
 * map our RGB colour to the closest in the cube, also work out the closest
 * grey, and use the nearest of the two.
 *
 * Note that the xterm has much lower resolution for darker colours (they are
 * not evenly spread out), so our 6 levels are not evenly spread: 0x0, 0x5f
 * (95), 0x87 (135), 0xaf (175), 0xd7 (215) and 0xff (255). Greys are more
 * evenly spread (8, 18, 28 ... 238).
 */
int
colour_find_rgb(u_char r, u_char g, u_char b)
{
	static const int	q2c[6] = { 0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff };
	int			qr, qg, qb, cr, cg, cb, d, idx;
	int			grey_avg, grey_idx, grey;

	/* Map RGB to 6x6x6 cube. */
	qr = colour_to_6cube(r); cr = q2c[qr];
	qg = colour_to_6cube(g); cg = q2c[qg];
	qb = colour_to_6cube(b); cb = q2c[qb];

	/* If we have hit the colour exactly, return early. */
	if (cr == r && cg == g && cb == b)
		return ((16 + (36 * qr) + (6 * qg) + qb) | COLOUR_FLAG_256);

	/* Work out the closest grey (average of RGB). */
	grey_avg = (r + g + b) / 3;
	if (grey_avg > 238)
		grey_idx = 23;
	else
		grey_idx = (grey_avg - 3) / 10;
	grey = 8 + (10 * grey_idx);

	/* Is grey or 6x6x6 colour closest? */
	d = colour_dist_sq(cr, cg, cb, r, g, b);
	if (colour_dist_sq(grey, grey, grey, r, g, b) < d)
		idx = 232 + grey_idx;
	else
		idx = 16 + (36 * qr) + (6 * qg) + qb;
	return (idx | COLOUR_FLAG_256);
}

/* Join RGB into a colour. */
int
colour_join_rgb(u_char r, u_char g, u_char b)
{
	return ((((int)((r) & 0xff)) << 16) |
	    (((int)((g) & 0xff)) << 8) |
	    (((int)((b) & 0xff))) | COLOUR_FLAG_RGB);
}

/* Split colour into RGB. */
void
colour_split_rgb(int c, u_char *r, u_char *g, u_char *b)
{
	*r = (c >> 16) & 0xff;
	*g = (c >> 8) & 0xff;
	*b = c & 0xff;
}

/* Force colour to RGB if not already. */
int
colour_force_rgb(int c)
{
	if (c & COLOUR_FLAG_RGB)
		return (c);
	if (c & COLOUR_FLAG_256)
		return (colour_256toRGB(c));
	if (c >= 0 && c <= 7)
		return (colour_256toRGB(c));
	if (c >= 90 && c <= 97)
		return (colour_256toRGB(8 + c - 90));
	return (-1);
}

/* Convert colour to a string. */
const char *
colour_tostring(int c)
{
	static char	s[32];
	u_char		r, g, b;

	if (c == -1)
		return ("none");

	if (c & COLOUR_FLAG_RGB) {
		colour_split_rgb(c, &r, &g, &b);
		xsnprintf(s, sizeof s, "#%02x%02x%02x", r, g, b);
		return (s);
	}

	if (c & COLOUR_FLAG_256) {
		xsnprintf(s, sizeof s, "colour%u", c & 0xff);
		return (s);
	}

	switch (c) {
	case 0:
		return ("black");
	case 1:
		return ("red");
	case 2:
		return ("green");
	case 3:
		return ("yellow");
	case 4:
		return ("blue");
	case 5:
		return ("magenta");
	case 6:
		return ("cyan");
	case 7:
		return ("white");
	case 8:
		return ("default");
	case 9:
		return ("terminal");
	case 90:
		return ("brightblack");
	case 91:
		return ("brightred");
	case 92:
		return ("brightgreen");
	case 93:
		return ("brightyellow");
	case 94:
		return ("brightblue");
	case 95:
		return ("brightmagenta");
	case 96:
		return ("brightcyan");
	case 97:
		return ("brightwhite");
	}
	return ("invalid");
}

/* Convert colour from string. */
int
colour_fromstring(const char *s)
{
	const char	*errstr;
	const char	*cp;
	int		 n;
	u_char		 r, g, b;

	if (*s == '#' && strlen(s) == 7) {
		for (cp = s + 1; isxdigit((u_char) *cp); cp++)
			;
		if (*cp != '\0')
			return (-1);
		n = sscanf(s + 1, "%2hhx%2hhx%2hhx", &r, &g, &b);
		if (n != 3)
			return (-1);
		return (colour_join_rgb(r, g, b));
	}

	if (strncasecmp(s, "colour", (sizeof "colour") - 1) == 0) {
		n = strtonum(s + (sizeof "colour") - 1, 0, 255, &errstr);
		if (errstr != NULL)
			return (-1);
		return (n | COLOUR_FLAG_256);
	}
	if (strncasecmp(s, "color", (sizeof "color") - 1) == 0) {
		n = strtonum(s + (sizeof "color") - 1, 0, 255, &errstr);
		if (errstr != NULL)
			return (-1);
		return (n | COLOUR_FLAG_256);
	}

	if (strcasecmp(s, "default") == 0)
		return (8);
	if (strcasecmp(s, "terminal") == 0)
		return (9);

	if (strcasecmp(s, "black") == 0 || strcmp(s, "0") == 0)
		return (0);
	if (strcasecmp(s, "red") == 0 || strcmp(s, "1") == 0)
		return (1);
	if (strcasecmp(s, "green") == 0 || strcmp(s, "2") == 0)
		return (2);
	if (strcasecmp(s, "yellow") == 0 || strcmp(s, "3") == 0)
		return (3);
	if (strcasecmp(s, "blue") == 0 || strcmp(s, "4") == 0)
		return (4);
	if (strcasecmp(s, "magenta") == 0 || strcmp(s, "5") == 0)
		return (5);
	if (strcasecmp(s, "cyan") == 0 || strcmp(s, "6") == 0)
		return (6);
	if (strcasecmp(s, "white") == 0 || strcmp(s, "7") == 0)
		return (7);
	if (strcasecmp(s, "brightblack") == 0 || strcmp(s, "90") == 0)
		return (90);
	if (strcasecmp(s, "brightred") == 0 || strcmp(s, "91") == 0)
		return (91);
	if (strcasecmp(s, "brightgreen") == 0 || strcmp(s, "92") == 0)
		return (92);
	if (strcasecmp(s, "brightyellow") == 0 || strcmp(s, "93") == 0)
		return (93);
	if (strcasecmp(s, "brightblue") == 0 || strcmp(s, "94") == 0)
		return (94);
	if (strcasecmp(s, "brightmagenta") == 0 || strcmp(s, "95") == 0)
		return (95);
	if (strcasecmp(s, "brightcyan") == 0 || strcmp(s, "96") == 0)
		return (96);
	if (strcasecmp(s, "brightwhite") == 0 || strcmp(s, "97") == 0)
		return (97);
	return (colour_byname(s));
}

/* Convert 256 colour to RGB colour. */
int
colour_256toRGB(int c)
{
	static const int table[256] = {
		0x000000, 0x800000, 0x008000, 0x808000,
		0x000080, 0x800080, 0x008080, 0xc0c0c0,
		0x808080, 0xff0000, 0x00ff00, 0xffff00,
		0x0000ff, 0xff00ff, 0x00ffff, 0xffffff,
		0x000000, 0x00005f, 0x000087, 0x0000af,
		0x0000d7, 0x0000ff, 0x005f00, 0x005f5f,
		0x005f87, 0x005faf, 0x005fd7, 0x005fff,
		0x008700, 0x00875f, 0x008787, 0x0087af,
		0x0087d7, 0x0087ff, 0x00af00, 0x00af5f,
		0x00af87, 0x00afaf, 0x00afd7, 0x00afff,
		0x00d700, 0x00d75f, 0x00d787, 0x00d7af,
		0x00d7d7, 0x00d7ff, 0x00ff00, 0x00ff5f,
		0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff,
		0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af,
		0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f,
		0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff,
		0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af,
		0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f,
		0x5faf87, 0x5fafaf, 0x5fafd7, 0x5fafff,
		0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af,
		0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f,
		0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff,
		0x870000, 0x87005f, 0x870087, 0x8700af,
		0x8700d7, 0x8700ff, 0x875f00, 0x875f5f,
		0x875f87, 0x875faf, 0x875fd7, 0x875fff,
		0x878700, 0x87875f, 0x878787, 0x8787af,
		0x8787d7, 0x8787ff, 0x87af00, 0x87af5f,
		0x87af87, 0x87afaf, 0x87afd7, 0x87afff,
		0x87d700, 0x87d75f, 0x87d787, 0x87d7af,
		0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f,
		0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff,
		0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af,
		0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f,
		0xaf5f87, 0xaf5faf, 0xaf5fd7, 0xaf5fff,
		0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af,
		0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f,
		0xafaf87, 0xafafaf, 0xafafd7, 0xafafff,
		0xafd700, 0xafd75f, 0xafd787, 0xafd7af,
		0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f,
		0xafff87, 0xafffaf, 0xafffd7, 0xafffff,
		0xd70000, 0xd7005f, 0xd70087, 0xd700af,
		0xd700d7, 0xd700ff, 0xd75f00, 0xd75f5f,
		0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff,
		0xd78700, 0xd7875f, 0xd78787, 0xd787af,
		0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f,
		0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff,
		0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af,
		0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f,
		0xd7ff87, 0xd7ffaf, 0xd7ffd7, 0xd7ffff,
		0xff0000, 0xff005f, 0xff0087, 0xff00af,
		0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f,
		0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff,
		0xff8700, 0xff875f, 0xff8787, 0xff87af,
		0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f,
		0xffaf87, 0xffafaf, 0xffafd7, 0xffafff,
		0xffd700, 0xffd75f, 0xffd787, 0xffd7af,
		0xffd7d7, 0xffd7ff, 0xffff00, 0xffff5f,
		0xffff87, 0xffffaf, 0xffffd7, 0xffffff,
		0x080808, 0x121212, 0x1c1c1c, 0x262626,
		0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e,
		0x585858, 0x626262, 0x6c6c6c, 0x767676,
		0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e,
		0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6,
		0xd0d0d0, 0xdadada, 0xe4e4e4, 0xeeeeee
	};

	return (table[c & 0xff] | COLOUR_FLAG_RGB);
}

/* Convert 256 colour to 16 colour. */
int
colour_256to16(int c)
{
	static const char table[256] = {
		 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
		 0,  4,  4,  4, 12, 12,  2,  6,  4,  4, 12, 12,  2,  2,  6,  4,
		12, 12,  2,  2,  2,  6, 12, 12, 10, 10, 10, 10, 14, 12, 10, 10,
		10, 10, 10, 14,  1,  5,  4,  4, 12, 12,  3,  8,  4,  4, 12, 12,
		 2,  2,  6,  4, 12, 12,  2,  2,  2,  6, 12, 12, 10, 10, 10, 10,
		14, 12, 10, 10, 10, 10, 10, 14,  1,  1,  5,  4, 12, 12,  1,  1,
		 5,  4, 12, 12,  3,  3,  8,  4, 12, 12,  2,  2,  2,  6, 12, 12,
		10, 10, 10, 10, 14, 12, 10, 10, 10, 10, 10, 14,  1,  1,  1,  5,
		12, 12,  1,  1,  1,  5, 12, 12,  1,  1,  1,  5, 12, 12,  3,  3,
		 3,  7, 12, 12, 10, 10, 10, 10, 14, 12, 10, 10, 10, 10, 10, 14,
		 9,  9,  9,  9, 13, 12,  9,  9,  9,  9, 13, 12,  9,  9,  9,  9,
		13, 12,  9,  9,  9,  9, 13, 12, 11, 11, 11, 11,  7, 12, 10, 10,
		10, 10, 10, 14,  9,  9,  9,  9,  9, 13,  9,  9,  9,  9,  9, 13,
		 9,  9,  9,  9,  9, 13,  9,  9,  9,  9,  9, 13,  9,  9,  9,  9,
		 9, 13, 11, 11, 11, 11, 11, 15,  0,  0,  0,  0,  0,  0,  8,  8,
		 8,  8,  8,  8,  7,  7,  7,  7,  7,  7, 15, 15, 15, 15, 15, 15
	};

	return (table[c & 0xff]);
}

/* Get colour by X11 colour name. */
int
colour_byname(const char *name)
{
	static const struct {
		const char	*name;
		int		 c;
	} colours[] = {
		{ "AliceBlue", 0xf0f8ff },
		{ "AntiqueWhite", 0xfaebd7 },
		{ "AntiqueWhite1", 0xffefdb },
		{ "AntiqueWhite2", 0xeedfcc },
		{ "AntiqueWhite3", 0xcdc0b0 },
		{ "AntiqueWhite4", 0x8b8378 },
		{ "BlanchedAlmond", 0xffebcd },
		{ "BlueViolet", 0x8a2be2 },
		{ "CadetBlue", 0x5f9ea0 },
		{ "CadetBlue1", 0x98f5ff },
		{ "CadetBlue2", 0x8ee5ee },
		{ "CadetBlue3", 0x7ac5cd },
		{ "CadetBlue4", 0x53868b },
		{ "CornflowerBlue", 0x6495ed },
		{ "DarkBlue", 0x00008b },
		{ "DarkCyan", 0x008b8b },
		{ "DarkGoldenrod", 0xb8860b },
		{ "DarkGoldenrod1", 0xffb90f },
		{ "DarkGoldenrod2", 0xeead0e },
		{ "DarkGoldenrod3", 0xcd950c },
		{ "DarkGoldenrod4", 0x8b6508 },
		{ "DarkGray", 0xa9a9a9 },
		{ "DarkGreen", 0x006400 },
		{ "DarkGrey", 0xa9a9a9 },
		{ "DarkKhaki", 0xbdb76b },
		{ "DarkMagenta", 0x8b008b },
		{ "DarkOliveGreen", 0x556b2f },
		{ "DarkOliveGreen1", 0xcaff70 },
		{ "DarkOliveGreen2", 0xbcee68 },
		{ "DarkOliveGreen3", 0xa2cd5a },
		{ "DarkOliveGreen4", 0x6e8b3d },
		{ "DarkOrange", 0xff8c00 },
		{ "DarkOrange1", 0xff7f00 },
		{ "DarkOrange2", 0xee7600 },
		{ "DarkOrange3", 0xcd6600 },
		{ "DarkOrange4", 0x8b4500 },
		{ "DarkOrchid", 0x9932cc },
		{ "DarkOrchid1", 0xbf3eff },
		{ "DarkOrchid2", 0xb23aee },
		{ "DarkOrchid3", 0x9a32cd },
		{ "DarkOrchid4", 0x68228b },
		{ "DarkRed", 0x8b0000 },
		{ "DarkSalmon", 0xe9967a },
		{ "DarkSeaGreen", 0x8fbc8f },
		{ "DarkSeaGreen1", 0xc1ffc1 },
		{ "DarkSeaGreen2", 0xb4eeb4 },
		{ "DarkSeaGreen3", 0x9bcd9b },
		{ "DarkSeaGreen4", 0x698b69 },
		{ "DarkSlateBlue", 0x483d8b },
		{ "DarkSlateGray", 0x2f4f4f },
		{ "DarkSlateGray1", 0x97ffff },
		{ "DarkSlateGray2", 0x8deeee },
		{ "DarkSlateGray3", 0x79cdcd },
		{ "DarkSlateGray4", 0x528b8b },
		{ "DarkSlateGrey", 0x2f4f4f },
		{ "DarkTurquoise", 0x00ced1 },
		{ "DarkViolet", 0x9400d3 },
		{ "DeepPink", 0xff1493 },
		{ "DeepPink1", 0xff1493 },
		{ "DeepPink2", 0xee1289 },
		{ "DeepPink3", 0xcd1076 },
		{ "DeepPink4", 0x8b0a50 },
		{ "DeepSkyBlue", 0x00bfff },
		{ "DeepSkyBlue1", 0x00bfff },
		{ "DeepSkyBlue2", 0x00b2ee },
		{ "DeepSkyBlue3", 0x009acd },
		{ "DeepSkyBlue4", 0x00688b },
		{ "DimGray", 0x696969 },
		{ "DimGrey", 0x696969 },
		{ "DodgerBlue", 0x1e90ff },
		{ "DodgerBlue1", 0x1e90ff },
		{ "DodgerBlue2", 0x1c86ee },
		{ "DodgerBlue3", 0x1874cd },
		{ "DodgerBlue4", 0x104e8b },
		{ "FloralWhite", 0xfffaf0 },
		{ "ForestGreen", 0x228b22 },
		{ "GhostWhite", 0xf8f8ff },
		{ "GreenYellow", 0xadff2f },
		{ "HotPink", 0xff69b4 },
		{ "HotPink1", 0xff6eb4 },
		{ "HotPink2", 0xee6aa7 },
		{ "HotPink3", 0xcd6090 },
		{ "HotPink4", 0x8b3a62 },
		{ "IndianRed", 0xcd5c5c },
		{ "IndianRed1", 0xff6a6a },
		{ "IndianRed2", 0xee6363 },
		{ "IndianRed3", 0xcd5555 },
		{ "IndianRed4", 0x8b3a3a },
		{ "LavenderBlush", 0xfff0f5 },
		{ "LavenderBlush1", 0xfff0f5 },
		{ "LavenderBlush2", 0xeee0e5 },
		{ "LavenderBlush3", 0xcdc1c5 },
		{ "LavenderBlush4", 0x8b8386 },
		{ "LawnGreen", 0x7cfc00 },
		{ "LemonChiffon", 0xfffacd },
		{ "LemonChiffon1", 0xfffacd },
		{ "LemonChiffon2", 0xeee9bf },
		{ "LemonChiffon3", 0xcdc9a5 },
		{ "LemonChiffon4", 0x8b8970 },
		{ "LightBlue", 0xadd8e6 },
		{ "LightBlue1", 0xbfefff },
		{ "LightBlue2", 0xb2dfee },
		{ "LightBlue3", 0x9ac0cd },
		{ "LightBlue4", 0x68838b },
		{ "LightCoral", 0xf08080 },
		{ "LightCyan", 0xe0ffff },
		{ "LightCyan1", 0xe0ffff },
		{ "LightCyan2", 0xd1eeee },
		{ "LightCyan3", 0xb4cdcd },
		{ "LightCyan4", 0x7a8b8b },
		{ "LightGoldenrod", 0xeedd82 },
		{ "LightGoldenrod1", 0xffec8b },
		{ "LightGoldenrod2", 0xeedc82 },
		{ "LightGoldenrod3", 0xcdbe70 },
		{ "LightGoldenrod4", 0x8b814c },
		{ "LightGoldenrodYellow", 0xfafad2 },
		{ "LightGray", 0xd3d3d3 },
		{ "LightGreen", 0x90ee90 },
		{ "LightGrey", 0xd3d3d3 },
		{ "LightPink", 0xffb6c1 },
		{ "LightPink1", 0xffaeb9 },
		{ "LightPink2", 0xeea2ad },
		{ "LightPink3", 0xcd8c95 },
		{ "LightPink4", 0x8b5f65 },
		{ "LightSalmon", 0xffa07a },
		{ "LightSalmon1", 0xffa07a },
		{ "LightSalmon2", 0xee9572 },
		{ "LightSalmon3", 0xcd8162 },
		{ "LightSalmon4", 0x8b5742 },
		{ "LightSeaGreen", 0x20b2aa },
		{ "LightSkyBlue", 0x87cefa },
		{ "LightSkyBlue1", 0xb0e2ff },
		{ "LightSkyBlue2", 0xa4d3ee },
		{ "LightSkyBlue3", 0x8db6cd },
		{ "LightSkyBlue4", 0x607b8b },
		{ "LightSlateBlue", 0x8470ff },
		{ "LightSlateGray", 0x778899 },
		{ "LightSlateGrey", 0x778899 },
		{ "LightSteelBlue", 0xb0c4de },
		{ "LightSteelBlue1", 0xcae1ff },
		{ "LightSteelBlue2", 0xbcd2ee },
		{ "LightSteelBlue3", 0xa2b5cd },
		{ "LightSteelBlue4", 0x6e7b8b },
		{ "LightYellow", 0xffffe0 },
		{ "LightYellow1", 0xffffe0 },
		{ "LightYellow2", 0xeeeed1 },
		{ "LightYellow3", 0xcdcdb4 },
		{ "LightYellow4", 0x8b8b7a },
		{ "LimeGreen", 0x32cd32 },
		{ "MediumAquamarine", 0x66cdaa },
		{ "MediumBlue", 0x0000cd },
		{ "MediumOrchid", 0xba55d3 },
		{ "MediumOrchid1", 0xe066ff },
		{ "MediumOrchid2", 0xd15fee },
		{ "MediumOrchid3", 0xb452cd },
		{ "MediumOrchid4", 0x7a378b },
		{ "MediumPurple", 0x9370db },
		{ "MediumPurple1", 0xab82ff },
		{ "MediumPurple2", 0x9f79ee },
		{ "MediumPurple3", 0x8968cd },
		{ "MediumPurple4", 0x5d478b },
		{ "MediumSeaGreen", 0x3cb371 },
		{ "MediumSlateBlue", 0x7b68ee },
		{ "MediumSpringGreen", 0x00fa9a },
		{ "MediumTurquoise", 0x48d1cc },
		{ "MediumVioletRed", 0xc71585 },
		{ "MidnightBlue", 0x191970 },
		{ "MintCream", 0xf5fffa },
		{ "MistyRose", 0xffe4e1 },
		{ "MistyRose1", 0xffe4e1 },
		{ "MistyRose2", 0xeed5d2 },
		{ "MistyRose3", 0xcdb7b5 },
		{ "MistyRose4", 0x8b7d7b },
		{ "NavajoWhite", 0xffdead },
		{ "NavajoWhite1", 0xffdead },
		{ "NavajoWhite2", 0xeecfa1 },
		{ "NavajoWhite3", 0xcdb38b },
		{ "NavajoWhite4", 0x8b795e },
		{ "NavyBlue", 0x000080 },
		{ "OldLace", 0xfdf5e6 },
		{ "OliveDrab", 0x6b8e23 },
		{ "OliveDrab1", 0xc0ff3e },
		{ "OliveDrab2", 0xb3ee3a },
		{ "OliveDrab3", 0x9acd32 },
		{ "OliveDrab4", 0x698b22 },
		{ "OrangeRed", 0xff4500 },
		{ "OrangeRed1", 0xff4500 },
		{ "OrangeRed2", 0xee4000 },
		{ "OrangeRed3", 0xcd3700 },
		{ "OrangeRed4", 0x8b2500 },
		{ "PaleGoldenrod", 0xeee8aa },
		{ "PaleGreen", 0x98fb98 },
		{ "PaleGreen1", 0x9aff9a },
		{ "PaleGreen2", 0x90ee90 },
		{ "PaleGreen3", 0x7ccd7c },
		{ "PaleGreen4", 0x548b54 },
		{ "PaleTurquoise", 0xafeeee },
		{ "PaleTurquoise1", 0xbbffff },
		{ "PaleTurquoise2", 0xaeeeee },
		{ "PaleTurquoise3", 0x96cdcd },
		{ "PaleTurquoise4", 0x668b8b },
		{ "PaleVioletRed", 0xdb7093 },
		{ "PaleVioletRed1", 0xff82ab },
		{ "PaleVioletRed2", 0xee799f },
		{ "PaleVioletRed3", 0xcd6889 },
		{ "PaleVioletRed4", 0x8b475d },
		{ "PapayaWhip", 0xffefd5 },
		{ "PeachPuff", 0xffdab9 },
		{ "PeachPuff1", 0xffdab9 },
		{ "PeachPuff2", 0xeecbad },
		{ "PeachPuff3", 0xcdaf95 },
		{ "PeachPuff4", 0x8b7765 },
		{ "PowderBlue", 0xb0e0e6 },
		{ "RebeccaPurple", 0x663399 },
		{ "RosyBrown", 0xbc8f8f },
		{ "RosyBrown1", 0xffc1c1 },
		{ "RosyBrown2", 0xeeb4b4 },
		{ "RosyBrown3", 0xcd9b9b },
		{ "RosyBrown4", 0x8b6969 },
		{ "RoyalBlue", 0x4169e1 },
		{ "RoyalBlue1", 0x4876ff },
		{ "RoyalBlue2", 0x436eee },
		{ "RoyalBlue3", 0x3a5fcd },
		{ "RoyalBlue4", 0x27408b },
		{ "SaddleBrown", 0x8b4513 },
		{ "SandyBrown", 0xf4a460 },
		{ "SeaGreen", 0x2e8b57 },
		{ "SeaGreen1", 0x54ff9f },
		{ "SeaGreen2", 0x4eee94 },
		{ "SeaGreen3", 0x43cd80 },
		{ "SeaGreen4", 0x2e8b57 },
		{ "SkyBlue", 0x87ceeb },
		{ "SkyBlue1", 0x87ceff },
		{ "SkyBlue2", 0x7ec0ee },
		{ "SkyBlue3", 0x6ca6cd },
		{ "SkyBlue4", 0x4a708b },
		{ "SlateBlue", 0x6a5acd },
		{ "SlateBlue1", 0x836fff },
		{ "SlateBlue2", 0x7a67ee },
		{ "SlateBlue3", 0x6959cd },
		{ "SlateBlue4", 0x473c8b },
		{ "SlateGray", 0x708090 },
		{ "SlateGray1", 0xc6e2ff },
		{ "SlateGray2", 0xb9d3ee },
		{ "SlateGray3", 0x9fb6cd },
		{ "SlateGray4", 0x6c7b8b },
		{ "SlateGrey", 0x708090 },
		{ "SpringGreen", 0x00ff7f },
		{ "SpringGreen1", 0x00ff7f },
		{ "SpringGreen2", 0x00ee76 },
		{ "SpringGreen3", 0x00cd66 },
		{ "SpringGreen4", 0x008b45 },
		{ "SteelBlue", 0x4682b4 },
		{ "SteelBlue1", 0x63b8ff },
		{ "SteelBlue2", 0x5cacee },
		{ "SteelBlue3", 0x4f94cd },
		{ "SteelBlue4", 0x36648b },
		{ "VioletRed", 0xd02090 },
		{ "VioletRed1", 0xff3e96 },
		{ "VioletRed2", 0xee3a8c },
		{ "VioletRed3", 0xcd3278 },
		{ "VioletRed4", 0x8b2252 },
		{ "WebGray", 0x808080 },
		{ "WebGreen", 0x008000 },
		{ "WebGrey", 0x808080 },
		{ "WebMaroon", 0x800000 },
		{ "WebPurple", 0x800080 },
		{ "WhiteSmoke", 0xf5f5f5 },
		{ "X11Gray", 0xbebebe },
		{ "X11Green", 0x00ff00 },
		{ "X11Grey", 0xbebebe },
		{ "X11Maroon", 0xb03060 },
		{ "X11Purple", 0xa020f0 },
		{ "YellowGreen", 0x9acd32 },
		{ "alice blue", 0xf0f8ff },
		{ "antique white", 0xfaebd7 },
		{ "aqua", 0x00ffff },
		{ "aquamarine", 0x7fffd4 },
		{ "aquamarine1", 0x7fffd4 },
		{ "aquamarine2", 0x76eec6 },
		{ "aquamarine3", 0x66cdaa },
		{ "aquamarine4", 0x458b74 },
		{ "azure", 0xf0ffff },
		{ "azure1", 0xf0ffff },
		{ "azure2", 0xe0eeee },
		{ "azure3", 0xc1cdcd },
		{ "azure4", 0x838b8b },
		{ "beige", 0xf5f5dc },
		{ "bisque", 0xffe4c4 },
		{ "bisque1", 0xffe4c4 },
		{ "bisque2", 0xeed5b7 },
		{ "bisque3", 0xcdb79e },
		{ "bisque4", 0x8b7d6b },
		{ "black", 0x000000 },
		{ "blanched almond", 0xffebcd },
		{ "blue violet", 0x8a2be2 },
		{ "blue", 0x0000ff },
		{ "blue1", 0x0000ff },
		{ "blue2", 0x0000ee },
		{ "blue3", 0x0000cd },
		{ "blue4", 0x00008b },
		{ "brown", 0xa52a2a },
		{ "brown1", 0xff4040 },
		{ "brown2", 0xee3b3b },
		{ "brown3", 0xcd3333 },
		{ "brown4", 0x8b2323 },
		{ "burlywood", 0xdeb887 },
		{ "burlywood1", 0xffd39b },
		{ "burlywood2", 0xeec591 },
		{ "burlywood3", 0xcdaa7d },
		{ "burlywood4", 0x8b7355 },
		{ "cadet blue", 0x5f9ea0 },
		{ "chartreuse", 0x7fff00 },
		{ "chartreuse1", 0x7fff00 },
		{ "chartreuse2", 0x76ee00 },
		{ "chartreuse3", 0x66cd00 },
		{ "chartreuse4", 0x458b00 },
		{ "chocolate", 0xd2691e },
		{ "chocolate1", 0xff7f24 },
		{ "chocolate2", 0xee7621 },
		{ "chocolate3", 0xcd661d },
		{ "chocolate4", 0x8b4513 },
		{ "coral", 0xff7f50 },
		{ "coral1", 0xff7256 },
		{ "coral2", 0xee6a50 },
		{ "coral3", 0xcd5b45 },
		{ "coral4", 0x8b3e2f },
		{ "cornflower blue", 0x6495ed },
		{ "cornsilk", 0xfff8dc },
		{ "cornsilk1", 0xfff8dc },
		{ "cornsilk2", 0xeee8cd },
		{ "cornsilk3", 0xcdc8b1 },
		{ "cornsilk4", 0x8b8878 },
		{ "crimson", 0xdc143c },
		{ "cyan", 0x00ffff },
		{ "cyan1", 0x00ffff },
		{ "cyan2", 0x00eeee },
		{ "cyan3", 0x00cdcd },
		{ "cyan4", 0x008b8b },
		{ "dark blue", 0x00008b },
		{ "dark cyan", 0x008b8b },
		{ "dark goldenrod", 0xb8860b },
		{ "dark gray", 0xa9a9a9 },
		{ "dark green", 0x006400 },
		{ "dark grey", 0xa9a9a9 },
		{ "dark khaki", 0xbdb76b },
		{ "dark magenta", 0x8b008b },
		{ "dark olive green", 0x556b2f },
		{ "dark orange", 0xff8c00 },
		{ "dark orchid", 0x9932cc },
		{ "dark red", 0x8b0000 },
		{ "dark salmon", 0xe9967a },
		{ "dark sea green", 0x8fbc8f },
		{ "dark slate blue", 0x483d8b },
		{ "dark slate gray", 0x2f4f4f },
		{ "dark slate grey", 0x2f4f4f },
		{ "dark turquoise", 0x00ced1 },
		{ "dark violet", 0x9400d3 },
		{ "deep pink", 0xff1493 },
		{ "deep sky blue", 0x00bfff },
		{ "dim gray", 0x696969 },
		{ "dim grey", 0x696969 },
		{ "dodger blue", 0x1e90ff },
		{ "firebrick", 0xb22222 },
		{ "firebrick1", 0xff3030 },
		{ "firebrick2", 0xee2c2c },
		{ "firebrick3", 0xcd2626 },
		{ "firebrick4", 0x8b1a1a },
		{ "floral white", 0xfffaf0 },
		{ "forest green", 0x228b22 },
		{ "fuchsia", 0xff00ff },
		{ "gainsboro", 0xdcdcdc },
		{ "ghost white", 0xf8f8ff },
		{ "gold", 0xffd700 },
		{ "gold1", 0xffd700 },
		{ "gold2", 0xeec900 },
		{ "gold3", 0xcdad00 },
		{ "gold4", 0x8b7500 },
		{ "goldenrod", 0xdaa520 },
		{ "goldenrod1", 0xffc125 },
		{ "goldenrod2", 0xeeb422 },
		{ "goldenrod3", 0xcd9b1d },
		{ "goldenrod4", 0x8b6914 },
		{ "green yellow", 0xadff2f },
		{ "green", 0x00ff00 },
		{ "green1", 0x00ff00 },
		{ "green2", 0x00ee00 },
		{ "green3", 0x00cd00 },
		{ "green4", 0x008b00 },
		{ "honeydew", 0xf0fff0 },
		{ "honeydew1", 0xf0fff0 },
		{ "honeydew2", 0xe0eee0 },
		{ "honeydew3", 0xc1cdc1 },
		{ "honeydew4", 0x838b83 },
		{ "hot pink", 0xff69b4 },
		{ "indian red", 0xcd5c5c },
		{ "indigo", 0x4b0082 },
		{ "ivory", 0xfffff0 },
		{ "ivory1", 0xfffff0 },
		{ "ivory2", 0xeeeee0 },
		{ "ivory3", 0xcdcdc1 },
		{ "ivory4", 0x8b8b83 },
		{ "khaki", 0xf0e68c },
		{ "khaki1", 0xfff68f },
		{ "khaki2", 0xeee685 },
		{ "khaki3", 0xcdc673 },
		{ "khaki4", 0x8b864e },
		{ "lavender blush", 0xfff0f5 },
		{ "lavender", 0xe6e6fa },
		{ "lawn green", 0x7cfc00 },
		{ "lemon chiffon", 0xfffacd },
		{ "light blue", 0xadd8e6 },
		{ "light coral", 0xf08080 },
		{ "light cyan", 0xe0ffff },
		{ "light goldenrod yellow", 0xfafad2 },
		{ "light goldenrod", 0xeedd82 },
		{ "light gray", 0xd3d3d3 },
		{ "light green", 0x90ee90 },
		{ "light grey", 0xd3d3d3 },
		{ "light pink", 0xffb6c1 },
		{ "light salmon", 0xffa07a },
		{ "light sea green", 0x20b2aa },
		{ "light sky blue", 0x87cefa },
		{ "light slate blue", 0x8470ff },
		{ "light slate gray", 0x778899 },
		{ "light slate grey", 0x778899 },
		{ "light steel blue", 0xb0c4de },
		{ "light yellow", 0xffffe0 },
		{ "lime green", 0x32cd32 },
		{ "lime", 0x00ff00 },
		{ "linen", 0xfaf0e6 },
		{ "magenta", 0xff00ff },
		{ "magenta1", 0xff00ff },
		{ "magenta2", 0xee00ee },
		{ "magenta3", 0xcd00cd },
		{ "magenta4", 0x8b008b },
		{ "maroon", 0xb03060 },
		{ "maroon1", 0xff34b3 },
		{ "maroon2", 0xee30a7 },
		{ "maroon3", 0xcd2990 },
		{ "maroon4", 0x8b1c62 },
		{ "medium aquamarine", 0x66cdaa },
		{ "medium blue", 0x0000cd },
		{ "medium orchid", 0xba55d3 },
		{ "medium purple", 0x9370db },
		{ "medium sea green", 0x3cb371 },
		{ "medium slate blue", 0x7b68ee },
		{ "medium spring green", 0x00fa9a },
		{ "medium turquoise", 0x48d1cc },
		{ "medium violet red", 0xc71585 },
		{ "midnight blue", 0x191970 },
		{ "mint cream", 0xf5fffa },
		{ "misty rose", 0xffe4e1 },
		{ "moccasin", 0xffe4b5 },
		{ "navajo white", 0xffdead },
		{ "navy blue", 0x000080 },
		{ "navy", 0x000080 },
		{ "old lace", 0xfdf5e6 },
		{ "olive drab", 0x6b8e23 },
		{ "olive", 0x808000 },
		{ "orange red", 0xff4500 },
		{ "orange", 0xffa500 },
		{ "orange1", 0xffa500 },
		{ "orange2", 0xee9a00 },
		{ "orange3", 0xcd8500 },
		{ "orange4", 0x8b5a00 },
		{ "orchid", 0xda70d6 },
		{ "orchid1", 0xff83fa },
		{ "orchid2", 0xee7ae9 },
		{ "orchid3", 0xcd69c9 },
		{ "orchid4", 0x8b4789 },
		{ "pale goldenrod", 0xeee8aa },
		{ "pale green", 0x98fb98 },
		{ "pale turquoise", 0xafeeee },
		{ "pale violet red", 0xdb7093 },
		{ "papaya whip", 0xffefd5 },
		{ "peach puff", 0xffdab9 },
		{ "peru", 0xcd853f },
		{ "pink", 0xffc0cb },
		{ "pink1", 0xffb5c5 },
		{ "pink2", 0xeea9b8 },
		{ "pink3", 0xcd919e },
		{ "pink4", 0x8b636c },
		{ "plum", 0xdda0dd },
		{ "plum1", 0xffbbff },
		{ "plum2", 0xeeaeee },
		{ "plum3", 0xcd96cd },
		{ "plum4", 0x8b668b },
		{ "powder blue", 0xb0e0e6 },
		{ "purple", 0xa020f0 },
		{ "purple1", 0x9b30ff },
		{ "purple2", 0x912cee },
		{ "purple3", 0x7d26cd },
		{ "purple4", 0x551a8b },
		{ "rebecca purple", 0x663399 },
		{ "red", 0xff0000 },
		{ "red1", 0xff0000 },
		{ "red2", 0xee0000 },
		{ "red3", 0xcd0000 },
		{ "red4", 0x8b0000 },
		{ "rosy brown", 0xbc8f8f },
		{ "royal blue", 0x4169e1 },
		{ "saddle brown", 0x8b4513 },
		{ "salmon", 0xfa8072 },
		{ "salmon1", 0xff8c69 },
		{ "salmon2", 0xee8262 },
		{ "salmon3", 0xcd7054 },
		{ "salmon4", 0x8b4c39 },
		{ "sandy brown", 0xf4a460 },
		{ "sea green", 0x2e8b57 },
		{ "seashell", 0xfff5ee },
		{ "seashell1", 0xfff5ee },
		{ "seashell2", 0xeee5de },
		{ "seashell3", 0xcdc5bf },
		{ "seashell4", 0x8b8682 },
		{ "sienna", 0xa0522d },
		{ "sienna1", 0xff8247 },
		{ "sienna2", 0xee7942 },
		{ "sienna3", 0xcd6839 },
		{ "sienna4", 0x8b4726 },
		{ "silver", 0xc0c0c0 },
		{ "sky blue", 0x87ceeb },
		{ "slate blue", 0x6a5acd },
		{ "slate gray", 0x708090 },
		{ "slate grey", 0x708090 },
		{ "snow", 0xfffafa },
		{ "snow1", 0xfffafa },
		{ "snow2", 0xeee9e9 },
		{ "snow3", 0xcdc9c9 },
		{ "snow4", 0x8b8989 },
		{ "spring green", 0x00ff7f },
		{ "steel blue", 0x4682b4 },
		{ "tan", 0xd2b48c },
		{ "tan1", 0xffa54f },
		{ "tan2", 0xee9a49 },
		{ "tan3", 0xcd853f },
		{ "tan4", 0x8b5a2b },
		{ "teal", 0x008080 },
		{ "thistle", 0xd8bfd8 },
		{ "thistle1", 0xffe1ff },
		{ "thistle2", 0xeed2ee },
		{ "thistle3", 0xcdb5cd },
		{ "thistle4", 0x8b7b8b },
		{ "tomato", 0xff6347 },
		{ "tomato1", 0xff6347 },
		{ "tomato2", 0xee5c42 },
		{ "tomato3", 0xcd4f39 },
		{ "tomato4", 0x8b3626 },
		{ "turquoise", 0x40e0d0 },
		{ "turquoise1", 0x00f5ff },
		{ "turquoise2", 0x00e5ee },
		{ "turquoise3", 0x00c5cd },
		{ "turquoise4", 0x00868b },
		{ "violet red", 0xd02090 },
		{ "violet", 0xee82ee },
		{ "web gray", 0x808080 },
		{ "web green", 0x008000 },
		{ "web grey", 0x808080 },
		{ "web maroon", 0x800000 },
		{ "web purple", 0x800080 },
		{ "wheat", 0xf5deb3 },
		{ "wheat1", 0xffe7ba },
		{ "wheat2", 0xeed8ae },
		{ "wheat3", 0xcdba96 },
		{ "wheat4", 0x8b7e66 },
		{ "white smoke", 0xf5f5f5 },
		{ "white", 0xffffff },
		{ "x11 gray", 0xbebebe },
		{ "x11 green", 0x00ff00 },
		{ "x11 grey", 0xbebebe },
		{ "x11 maroon", 0xb03060 },
		{ "x11 purple", 0xa020f0 },
		{ "yellow green", 0x9acd32 },
		{ "yellow", 0xffff00 },
		{ "yellow1", 0xffff00 },
		{ "yellow2", 0xeeee00 },
		{ "yellow3", 0xcdcd00 },
		{ "yellow4", 0x8b8b00 }
	};
	u_int	i;
	int	c;

	if (strncmp(name, "grey", 4) == 0 || strncmp(name, "gray", 4) == 0) {
		if (!isdigit((u_char)name[4]))
			return (0xbebebe|COLOUR_FLAG_RGB);
		c = round(2.55 * atoi(name + 4));
		if (c < 0 || c > 255)
			return (-1);
		return (colour_join_rgb(c, c, c));
	}
	for (i = 0; i < nitems(colours); i++) {
		if (strcasecmp(colours[i].name, name) == 0)
			return (colours[i].c|COLOUR_FLAG_RGB);
	}
	return (-1);
}

/* Parse colour from an X11 string. */
int
colour_parseX11(const char *p)
{
	double	 c, m, y, k = 0;
	u_int	 r, g, b;
	size_t	 len = strlen(p);
	int	 colour = -1;
	char	*copy;

	if ((len == 12 && sscanf(p, "rgb:%02x/%02x/%02x", &r, &g, &b) == 3) ||
	    (len == 7 && sscanf(p, "#%02x%02x%02x", &r, &g, &b) == 3) ||
	    sscanf(p, "%d,%d,%d", &r, &g, &b) == 3)
		colour = colour_join_rgb(r, g, b);
	else if ((len == 18 &&
	    sscanf(p, "rgb:%04x/%04x/%04x", &r, &g, &b) == 3) ||
	    (len == 13 && sscanf(p, "#%04x%04x%04x", &r, &g, &b) == 3))
		colour = colour_join_rgb(r >> 8, g >> 8, b >> 8);
	else if ((sscanf(p, "cmyk:%lf/%lf/%lf/%lf", &c, &m, &y, &k) == 4 ||
	    sscanf(p, "cmy:%lf/%lf/%lf", &c, &m, &y) == 3) &&
	    c >= 0 && c <= 1 && m >= 0 && m <= 1 &&
	    y >= 0 && y <= 1 && k >= 0 && k <= 1) {
		colour = colour_join_rgb(
		    (1 - c) * (1 - k) * 255,
		    (1 - m) * (1 - k) * 255,
		    (1 - y) * (1 - k) * 255);
	} else {
		while (len != 0 && *p == ' ') {
			p++;
			len--;
		}
		while (len != 0 && p[len - 1] == ' ')
			len--;
		copy = xstrndup(p, len);
		colour = colour_byname(copy);
		free(copy);
	}
	log_debug("%s: %s = %s", __func__, p, colour_tostring(colour));
	return (colour);
}

/* Initialize palette. */
void
colour_palette_init(struct colour_palette *p)
{
	p->fg = 8;
	p->bg = 8;
	p->palette = NULL;
	p->default_palette = NULL;
}

/* Clear palette. */
void
colour_palette_clear(struct colour_palette *p)
{
	if (p != NULL) {
		p->fg = 8;
		p->bg = 8;
 		free(p->palette);
		p->palette = NULL;
	}
}

/* Free a palette. */
void
colour_palette_free(struct colour_palette *p)
{
	if (p != NULL) {
		free(p->palette);
		p->palette = NULL;
		free(p->default_palette);
		p->default_palette = NULL;
	}
}

/* Get a colour from a palette. */
int
colour_palette_get(struct colour_palette *p, int c)
{
	if (p == NULL)
		return (-1);

	if (c >= 90 && c <= 97)
		c = 8 + c - 90;
	else if (c & COLOUR_FLAG_256)
		c &= ~COLOUR_FLAG_256;
	else if (c >= 8)
		return (-1);

	if (p->palette != NULL && p->palette[c] != -1)
		return (p->palette[c]);
	if (p->default_palette != NULL && p->default_palette[c] != -1)
		return (p->default_palette[c]);
	return (-1);
}

/* Set a colour in a palette. */
int
colour_palette_set(struct colour_palette *p, int n, int c)
{
	u_int	i;

	if (p == NULL || n > 255)
		return (0);

	if (c == -1 && p->palette == NULL)
		return (0);

	if (c != -1 && p->palette == NULL) {
		if (p->palette == NULL)
			p->palette = xcalloc(256, sizeof *p->palette);
		for (i = 0; i < 256; i++)
			p->palette[i] = -1;
	}
	p->palette[n] = c;
	return (1);
}

/* Build palette defaults from an option. */
void
colour_palette_from_option(struct colour_palette *p, struct options *oo)
{
	struct options_entry		*o;
	struct options_array_item	*a;
	u_int				 i, n;
	int				 c;

	if (p == NULL)
		return;

	o = options_get(oo, "pane-colours");
	if ((a = options_array_first(o)) == NULL) {
		if (p->default_palette != NULL) {
			free(p->default_palette);
			p->default_palette = NULL;
		}
		return;
	}
	if (p->default_palette == NULL)
		p->default_palette = xcalloc(256, sizeof *p->default_palette);
	for (i = 0; i < 256; i++)
		p->default_palette[i] = -1;
	while (a != NULL) {
		n = options_array_item_index(a);
		if (n < 256) {
			c = options_array_item_value(a)->number;
			p->default_palette[n] = c;
		}
		a = options_array_next(a);
	}
}