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colour.c
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colour.c
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/* $OpenBSD$ */
/*
* Copyright (c) 2008 Nicholas Marriott <[email protected]>
*
* 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 "tmux.h"
/*
* Colour to string conversion functions. Bit 8 of the colour means it is one
* of the 256 colour palette.
*/
struct colour_rgb {
u_char i;
u_char r;
u_char g;
u_char b;
};
const struct colour_rgb colour_from_256[] = {
{ 0, 0x00, 0x00, 0x00 }, { 1, 0x00, 0x00, 0x5f },
{ 2, 0x00, 0x00, 0x87 }, { 3, 0x00, 0x00, 0xaf },
{ 4, 0x00, 0x00, 0xd7 }, { 5, 0x00, 0x00, 0xff },
{ 6, 0x00, 0x5f, 0x00 }, { 7, 0x00, 0x5f, 0x5f },
{ 8, 0x00, 0x5f, 0x87 }, { 9, 0x00, 0x5f, 0xaf },
{ 10, 0x00, 0x5f, 0xd7 }, { 11, 0x00, 0x5f, 0xff },
{ 12, 0x00, 0x87, 0x00 }, { 13, 0x00, 0x87, 0x5f },
{ 14, 0x00, 0x87, 0x87 }, { 15, 0x00, 0x87, 0xaf },
{ 16, 0x00, 0x87, 0xd7 }, { 17, 0x00, 0x87, 0xff },
{ 18, 0x00, 0xaf, 0x00 }, { 19, 0x00, 0xaf, 0x5f },
{ 20, 0x00, 0xaf, 0x87 }, { 21, 0x00, 0xaf, 0xaf },
{ 22, 0x00, 0xaf, 0xd7 }, { 23, 0x00, 0xaf, 0xff },
{ 24, 0x00, 0xd7, 0x00 }, { 25, 0x00, 0xd7, 0x5f },
{ 26, 0x00, 0xd7, 0x87 }, { 27, 0x00, 0xd7, 0xaf },
{ 28, 0x00, 0xd7, 0xd7 }, { 29, 0x00, 0xd7, 0xff },
{ 30, 0x00, 0xff, 0x00 }, { 31, 0x00, 0xff, 0x5f },
{ 32, 0x00, 0xff, 0x87 }, { 33, 0x00, 0xff, 0xaf },
{ 34, 0x00, 0xff, 0xd7 }, { 35, 0x00, 0xff, 0xff },
{ 36, 0x5f, 0x00, 0x00 }, { 37, 0x5f, 0x00, 0x5f },
{ 38, 0x5f, 0x00, 0x87 }, { 39, 0x5f, 0x00, 0xaf },
{ 40, 0x5f, 0x00, 0xd7 }, { 41, 0x5f, 0x00, 0xff },
{ 42, 0x5f, 0x5f, 0x00 }, { 43, 0x5f, 0x5f, 0x5f },
{ 44, 0x5f, 0x5f, 0x87 }, { 45, 0x5f, 0x5f, 0xaf },
{ 46, 0x5f, 0x5f, 0xd7 }, { 47, 0x5f, 0x5f, 0xff },
{ 48, 0x5f, 0x87, 0x00 }, { 49, 0x5f, 0x87, 0x5f },
{ 50, 0x5f, 0x87, 0x87 }, { 51, 0x5f, 0x87, 0xaf },
{ 52, 0x5f, 0x87, 0xd7 }, { 53, 0x5f, 0x87, 0xff },
{ 54, 0x5f, 0xaf, 0x00 }, { 55, 0x5f, 0xaf, 0x5f },
{ 56, 0x5f, 0xaf, 0x87 }, { 57, 0x5f, 0xaf, 0xaf },
{ 58, 0x5f, 0xaf, 0xd7 }, { 59, 0x5f, 0xaf, 0xff },
{ 60, 0x5f, 0xd7, 0x00 }, { 61, 0x5f, 0xd7, 0x5f },
{ 62, 0x5f, 0xd7, 0x87 }, { 63, 0x5f, 0xd7, 0xaf },
{ 64, 0x5f, 0xd7, 0xd7 }, { 65, 0x5f, 0xd7, 0xff },
{ 66, 0x5f, 0xff, 0x00 }, { 67, 0x5f, 0xff, 0x5f },
{ 68, 0x5f, 0xff, 0x87 }, { 69, 0x5f, 0xff, 0xaf },
{ 70, 0x5f, 0xff, 0xd7 }, { 71, 0x5f, 0xff, 0xff },
{ 72, 0x87, 0x00, 0x00 }, { 73, 0x87, 0x00, 0x5f },
{ 74, 0x87, 0x00, 0x87 }, { 75, 0x87, 0x00, 0xaf },
{ 76, 0x87, 0x00, 0xd7 }, { 77, 0x87, 0x00, 0xff },
{ 78, 0x87, 0x5f, 0x00 }, { 79, 0x87, 0x5f, 0x5f },
{ 80, 0x87, 0x5f, 0x87 }, { 81, 0x87, 0x5f, 0xaf },
{ 82, 0x87, 0x5f, 0xd7 }, { 83, 0x87, 0x5f, 0xff },
{ 84, 0x87, 0x87, 0x00 }, { 85, 0x87, 0x87, 0x5f },
{ 86, 0x87, 0x87, 0x87 }, { 87, 0x87, 0x87, 0xaf },
{ 88, 0x87, 0x87, 0xd7 }, { 89, 0x87, 0x87, 0xff },
{ 90, 0x87, 0xaf, 0x00 }, { 91, 0x87, 0xaf, 0x5f },
{ 92, 0x87, 0xaf, 0x87 }, { 93, 0x87, 0xaf, 0xaf },
{ 94, 0x87, 0xaf, 0xd7 }, { 95, 0x87, 0xaf, 0xff },
{ 96, 0x87, 0xd7, 0x00 }, { 97, 0x87, 0xd7, 0x5f },
{ 98, 0x87, 0xd7, 0x87 }, { 99, 0x87, 0xd7, 0xaf },
{ 100, 0x87, 0xd7, 0xd7 }, { 101, 0x87, 0xd7, 0xff },
{ 102, 0x87, 0xff, 0x00 }, { 103, 0x87, 0xff, 0x5f },
{ 104, 0x87, 0xff, 0x87 }, { 105, 0x87, 0xff, 0xaf },
{ 106, 0x87, 0xff, 0xd7 }, { 107, 0x87, 0xff, 0xff },
{ 108, 0xaf, 0x00, 0x00 }, { 109, 0xaf, 0x00, 0x5f },
{ 110, 0xaf, 0x00, 0x87 }, { 111, 0xaf, 0x00, 0xaf },
{ 112, 0xaf, 0x00, 0xd7 }, { 113, 0xaf, 0x00, 0xff },
{ 114, 0xaf, 0x5f, 0x00 }, { 115, 0xaf, 0x5f, 0x5f },
{ 116, 0xaf, 0x5f, 0x87 }, { 117, 0xaf, 0x5f, 0xaf },
{ 118, 0xaf, 0x5f, 0xd7 }, { 119, 0xaf, 0x5f, 0xff },
{ 120, 0xaf, 0x87, 0x00 }, { 121, 0xaf, 0x87, 0x5f },
{ 122, 0xaf, 0x87, 0x87 }, { 123, 0xaf, 0x87, 0xaf },
{ 124, 0xaf, 0x87, 0xd7 }, { 125, 0xaf, 0x87, 0xff },
{ 126, 0xaf, 0xaf, 0x00 }, { 127, 0xaf, 0xaf, 0x5f },
{ 128, 0xaf, 0xaf, 0x87 }, { 129, 0xaf, 0xaf, 0xaf },
{ 130, 0xaf, 0xaf, 0xd7 }, { 131, 0xaf, 0xaf, 0xff },
{ 132, 0xaf, 0xd7, 0x00 }, { 133, 0xaf, 0xd7, 0x5f },
{ 134, 0xaf, 0xd7, 0x87 }, { 135, 0xaf, 0xd7, 0xaf },
{ 136, 0xaf, 0xd7, 0xd7 }, { 137, 0xaf, 0xd7, 0xff },
{ 138, 0xaf, 0xff, 0x00 }, { 139, 0xaf, 0xff, 0x5f },
{ 140, 0xaf, 0xff, 0x87 }, { 141, 0xaf, 0xff, 0xaf },
{ 142, 0xaf, 0xff, 0xd7 }, { 143, 0xaf, 0xff, 0xff },
{ 144, 0xd7, 0x00, 0x00 }, { 145, 0xd7, 0x00, 0x5f },
{ 146, 0xd7, 0x00, 0x87 }, { 147, 0xd7, 0x00, 0xaf },
{ 148, 0xd7, 0x00, 0xd7 }, { 149, 0xd7, 0x00, 0xff },
{ 150, 0xd7, 0x5f, 0x00 }, { 151, 0xd7, 0x5f, 0x5f },
{ 152, 0xd7, 0x5f, 0x87 }, { 153, 0xd7, 0x5f, 0xaf },
{ 154, 0xd7, 0x5f, 0xd7 }, { 155, 0xd7, 0x5f, 0xff },
{ 156, 0xd7, 0x87, 0x00 }, { 157, 0xd7, 0x87, 0x5f },
{ 158, 0xd7, 0x87, 0x87 }, { 159, 0xd7, 0x87, 0xaf },
{ 160, 0xd7, 0x87, 0xd7 }, { 161, 0xd7, 0x87, 0xff },
{ 162, 0xd7, 0xaf, 0x00 }, { 163, 0xd7, 0xaf, 0x5f },
{ 164, 0xd7, 0xaf, 0x87 }, { 165, 0xd7, 0xaf, 0xaf },
{ 166, 0xd7, 0xaf, 0xd7 }, { 167, 0xd7, 0xaf, 0xff },
{ 168, 0xd7, 0xd7, 0x00 }, { 169, 0xd7, 0xd7, 0x5f },
{ 170, 0xd7, 0xd7, 0x87 }, { 171, 0xd7, 0xd7, 0xaf },
{ 172, 0xd7, 0xd7, 0xd7 }, { 173, 0xd7, 0xd7, 0xff },
{ 174, 0xd7, 0xff, 0x00 }, { 175, 0xd7, 0xff, 0x5f },
{ 176, 0xd7, 0xff, 0x87 }, { 177, 0xd7, 0xff, 0xaf },
{ 178, 0xd7, 0xff, 0xd7 }, { 179, 0xd7, 0xff, 0xff },
{ 180, 0xff, 0x00, 0x00 }, { 181, 0xff, 0x00, 0x5f },
{ 182, 0xff, 0x00, 0x87 }, { 183, 0xff, 0x00, 0xaf },
{ 184, 0xff, 0x00, 0xd7 }, { 185, 0xff, 0x00, 0xff },
{ 186, 0xff, 0x5f, 0x00 }, { 187, 0xff, 0x5f, 0x5f },
{ 188, 0xff, 0x5f, 0x87 }, { 189, 0xff, 0x5f, 0xaf },
{ 190, 0xff, 0x5f, 0xd7 }, { 191, 0xff, 0x5f, 0xff },
{ 192, 0xff, 0x87, 0x00 }, { 193, 0xff, 0x87, 0x5f },
{ 194, 0xff, 0x87, 0x87 }, { 195, 0xff, 0x87, 0xaf },
{ 196, 0xff, 0x87, 0xd7 }, { 197, 0xff, 0x87, 0xff },
{ 198, 0xff, 0xaf, 0x00 }, { 199, 0xff, 0xaf, 0x5f },
{ 200, 0xff, 0xaf, 0x87 }, { 201, 0xff, 0xaf, 0xaf },
{ 202, 0xff, 0xaf, 0xd7 }, { 203, 0xff, 0xaf, 0xff },
{ 204, 0xff, 0xd7, 0x00 }, { 205, 0xff, 0xd7, 0x5f },
{ 206, 0xff, 0xd7, 0x87 }, { 207, 0xff, 0xd7, 0xaf },
{ 208, 0xff, 0xd7, 0xd7 }, { 209, 0xff, 0xd7, 0xff },
{ 210, 0xff, 0xff, 0x00 }, { 211, 0xff, 0xff, 0x5f },
{ 212, 0xff, 0xff, 0x87 }, { 213, 0xff, 0xff, 0xaf },
{ 214, 0xff, 0xff, 0xd7 }, { 215, 0xff, 0xff, 0xff },
{ 216, 0x08, 0x08, 0x08 }, { 217, 0x12, 0x12, 0x12 },
{ 218, 0x1c, 0x1c, 0x1c }, { 219, 0x26, 0x26, 0x26 },
{ 220, 0x30, 0x30, 0x30 }, { 221, 0x3a, 0x3a, 0x3a },
{ 222, 0x44, 0x44, 0x44 }, { 223, 0x4e, 0x4e, 0x4e },
{ 224, 0x58, 0x58, 0x58 }, { 225, 0x62, 0x62, 0x62 },
{ 226, 0x6c, 0x6c, 0x6c }, { 227, 0x76, 0x76, 0x76 },
{ 228, 0x80, 0x80, 0x80 }, { 229, 0x8a, 0x8a, 0x8a },
{ 230, 0x94, 0x94, 0x94 }, { 231, 0x9e, 0x9e, 0x9e },
{ 232, 0xa8, 0xa8, 0xa8 }, { 233, 0xb2, 0xb2, 0xb2 },
{ 234, 0xbc, 0xbc, 0xbc }, { 235, 0xc6, 0xc6, 0xc6 },
{ 236, 0xd0, 0xd0, 0xd0 }, { 237, 0xda, 0xda, 0xda },
{ 238, 0xe4, 0xe4, 0xe4 }, { 239, 0xee, 0xee, 0xee },
};
const struct colour_rgb colour_to_256[] = {
{ 0, 0x00, 0x00, 0x00 }, { 1, 0x00, 0x00, 0x5f },
{ 2, 0x00, 0x00, 0x87 }, { 3, 0x00, 0x00, 0xaf },
{ 4, 0x00, 0x00, 0xd7 }, { 5, 0x00, 0x00, 0xff },
{ 6, 0x00, 0x5f, 0x00 }, { 7, 0x00, 0x5f, 0x5f },
{ 8, 0x00, 0x5f, 0x87 }, { 9, 0x00, 0x5f, 0xaf },
{ 10, 0x00, 0x5f, 0xd7 }, { 11, 0x00, 0x5f, 0xff },
{ 12, 0x00, 0x87, 0x00 }, { 13, 0x00, 0x87, 0x5f },
{ 14, 0x00, 0x87, 0x87 }, { 15, 0x00, 0x87, 0xaf },
{ 16, 0x00, 0x87, 0xd7 }, { 17, 0x00, 0x87, 0xff },
{ 18, 0x00, 0xaf, 0x00 }, { 19, 0x00, 0xaf, 0x5f },
{ 20, 0x00, 0xaf, 0x87 }, { 21, 0x00, 0xaf, 0xaf },
{ 22, 0x00, 0xaf, 0xd7 }, { 23, 0x00, 0xaf, 0xff },
{ 24, 0x00, 0xd7, 0x00 }, { 25, 0x00, 0xd7, 0x5f },
{ 26, 0x00, 0xd7, 0x87 }, { 27, 0x00, 0xd7, 0xaf },
{ 28, 0x00, 0xd7, 0xd7 }, { 29, 0x00, 0xd7, 0xff },
{ 30, 0x00, 0xff, 0x00 }, { 31, 0x00, 0xff, 0x5f },
{ 32, 0x00, 0xff, 0x87 }, { 33, 0x00, 0xff, 0xaf },
{ 34, 0x00, 0xff, 0xd7 }, { 35, 0x00, 0xff, 0xff },
{ 216, 0x08, 0x08, 0x08 }, { 217, 0x12, 0x12, 0x12 },
{ 218, 0x1c, 0x1c, 0x1c }, { 219, 0x26, 0x26, 0x26 },
{ 220, 0x30, 0x30, 0x30 }, { 221, 0x3a, 0x3a, 0x3a },
{ 222, 0x44, 0x44, 0x44 }, { 223, 0x4e, 0x4e, 0x4e },
{ 224, 0x58, 0x58, 0x58 }, { 36, 0x5f, 0x00, 0x00 },
{ 37, 0x5f, 0x00, 0x5f }, { 38, 0x5f, 0x00, 0x87 },
{ 39, 0x5f, 0x00, 0xaf }, { 40, 0x5f, 0x00, 0xd7 },
{ 41, 0x5f, 0x00, 0xff }, { 42, 0x5f, 0x5f, 0x00 },
{ 43, 0x5f, 0x5f, 0x5f }, { 44, 0x5f, 0x5f, 0x87 },
{ 45, 0x5f, 0x5f, 0xaf }, { 46, 0x5f, 0x5f, 0xd7 },
{ 47, 0x5f, 0x5f, 0xff }, { 48, 0x5f, 0x87, 0x00 },
{ 49, 0x5f, 0x87, 0x5f }, { 50, 0x5f, 0x87, 0x87 },
{ 51, 0x5f, 0x87, 0xaf }, { 52, 0x5f, 0x87, 0xd7 },
{ 53, 0x5f, 0x87, 0xff }, { 54, 0x5f, 0xaf, 0x00 },
{ 55, 0x5f, 0xaf, 0x5f }, { 56, 0x5f, 0xaf, 0x87 },
{ 57, 0x5f, 0xaf, 0xaf }, { 58, 0x5f, 0xaf, 0xd7 },
{ 59, 0x5f, 0xaf, 0xff }, { 60, 0x5f, 0xd7, 0x00 },
{ 61, 0x5f, 0xd7, 0x5f }, { 62, 0x5f, 0xd7, 0x87 },
{ 63, 0x5f, 0xd7, 0xaf }, { 64, 0x5f, 0xd7, 0xd7 },
{ 65, 0x5f, 0xd7, 0xff }, { 66, 0x5f, 0xff, 0x00 },
{ 67, 0x5f, 0xff, 0x5f }, { 68, 0x5f, 0xff, 0x87 },
{ 69, 0x5f, 0xff, 0xaf }, { 70, 0x5f, 0xff, 0xd7 },
{ 71, 0x5f, 0xff, 0xff }, { 225, 0x62, 0x62, 0x62 },
{ 226, 0x6c, 0x6c, 0x6c }, { 227, 0x76, 0x76, 0x76 },
{ 228, 0x80, 0x80, 0x80 }, { 72, 0x87, 0x00, 0x00 },
{ 73, 0x87, 0x00, 0x5f }, { 74, 0x87, 0x00, 0x87 },
{ 75, 0x87, 0x00, 0xaf }, { 76, 0x87, 0x00, 0xd7 },
{ 77, 0x87, 0x00, 0xff }, { 78, 0x87, 0x5f, 0x00 },
{ 79, 0x87, 0x5f, 0x5f }, { 80, 0x87, 0x5f, 0x87 },
{ 81, 0x87, 0x5f, 0xaf }, { 82, 0x87, 0x5f, 0xd7 },
{ 83, 0x87, 0x5f, 0xff }, { 84, 0x87, 0x87, 0x00 },
{ 85, 0x87, 0x87, 0x5f }, { 86, 0x87, 0x87, 0x87 },
{ 87, 0x87, 0x87, 0xaf }, { 88, 0x87, 0x87, 0xd7 },
{ 89, 0x87, 0x87, 0xff }, { 90, 0x87, 0xaf, 0x00 },
{ 91, 0x87, 0xaf, 0x5f }, { 92, 0x87, 0xaf, 0x87 },
{ 93, 0x87, 0xaf, 0xaf }, { 94, 0x87, 0xaf, 0xd7 },
{ 95, 0x87, 0xaf, 0xff }, { 96, 0x87, 0xd7, 0x00 },
{ 97, 0x87, 0xd7, 0x5f }, { 98, 0x87, 0xd7, 0x87 },
{ 99, 0x87, 0xd7, 0xaf }, { 100, 0x87, 0xd7, 0xd7 },
{ 101, 0x87, 0xd7, 0xff }, { 102, 0x87, 0xff, 0x00 },
{ 103, 0x87, 0xff, 0x5f }, { 104, 0x87, 0xff, 0x87 },
{ 105, 0x87, 0xff, 0xaf }, { 106, 0x87, 0xff, 0xd7 },
{ 107, 0x87, 0xff, 0xff }, { 229, 0x8a, 0x8a, 0x8a },
{ 230, 0x94, 0x94, 0x94 }, { 231, 0x9e, 0x9e, 0x9e },
{ 232, 0xa8, 0xa8, 0xa8 }, { 108, 0xaf, 0x00, 0x00 },
{ 109, 0xaf, 0x00, 0x5f }, { 110, 0xaf, 0x00, 0x87 },
{ 111, 0xaf, 0x00, 0xaf }, { 112, 0xaf, 0x00, 0xd7 },
{ 113, 0xaf, 0x00, 0xff }, { 114, 0xaf, 0x5f, 0x00 },
{ 115, 0xaf, 0x5f, 0x5f }, { 116, 0xaf, 0x5f, 0x87 },
{ 117, 0xaf, 0x5f, 0xaf }, { 118, 0xaf, 0x5f, 0xd7 },
{ 119, 0xaf, 0x5f, 0xff }, { 120, 0xaf, 0x87, 0x00 },
{ 121, 0xaf, 0x87, 0x5f }, { 122, 0xaf, 0x87, 0x87 },
{ 123, 0xaf, 0x87, 0xaf }, { 124, 0xaf, 0x87, 0xd7 },
{ 125, 0xaf, 0x87, 0xff }, { 126, 0xaf, 0xaf, 0x00 },
{ 127, 0xaf, 0xaf, 0x5f }, { 128, 0xaf, 0xaf, 0x87 },
{ 129, 0xaf, 0xaf, 0xaf }, { 130, 0xaf, 0xaf, 0xd7 },
{ 131, 0xaf, 0xaf, 0xff }, { 132, 0xaf, 0xd7, 0x00 },
{ 133, 0xaf, 0xd7, 0x5f }, { 134, 0xaf, 0xd7, 0x87 },
{ 135, 0xaf, 0xd7, 0xaf }, { 136, 0xaf, 0xd7, 0xd7 },
{ 137, 0xaf, 0xd7, 0xff }, { 138, 0xaf, 0xff, 0x00 },
{ 139, 0xaf, 0xff, 0x5f }, { 140, 0xaf, 0xff, 0x87 },
{ 141, 0xaf, 0xff, 0xaf }, { 142, 0xaf, 0xff, 0xd7 },
{ 143, 0xaf, 0xff, 0xff }, { 233, 0xb2, 0xb2, 0xb2 },
{ 234, 0xbc, 0xbc, 0xbc }, { 235, 0xc6, 0xc6, 0xc6 },
{ 236, 0xd0, 0xd0, 0xd0 }, { 144, 0xd7, 0x00, 0x00 },
{ 145, 0xd7, 0x00, 0x5f }, { 146, 0xd7, 0x00, 0x87 },
{ 147, 0xd7, 0x00, 0xaf }, { 148, 0xd7, 0x00, 0xd7 },
{ 149, 0xd7, 0x00, 0xff }, { 150, 0xd7, 0x5f, 0x00 },
{ 151, 0xd7, 0x5f, 0x5f }, { 152, 0xd7, 0x5f, 0x87 },
{ 153, 0xd7, 0x5f, 0xaf }, { 154, 0xd7, 0x5f, 0xd7 },
{ 155, 0xd7, 0x5f, 0xff }, { 156, 0xd7, 0x87, 0x00 },
{ 157, 0xd7, 0x87, 0x5f }, { 158, 0xd7, 0x87, 0x87 },
{ 159, 0xd7, 0x87, 0xaf }, { 160, 0xd7, 0x87, 0xd7 },
{ 161, 0xd7, 0x87, 0xff }, { 162, 0xd7, 0xaf, 0x00 },
{ 163, 0xd7, 0xaf, 0x5f }, { 164, 0xd7, 0xaf, 0x87 },
{ 165, 0xd7, 0xaf, 0xaf }, { 166, 0xd7, 0xaf, 0xd7 },
{ 167, 0xd7, 0xaf, 0xff }, { 168, 0xd7, 0xd7, 0x00 },
{ 169, 0xd7, 0xd7, 0x5f }, { 170, 0xd7, 0xd7, 0x87 },
{ 171, 0xd7, 0xd7, 0xaf }, { 172, 0xd7, 0xd7, 0xd7 },
{ 173, 0xd7, 0xd7, 0xff }, { 174, 0xd7, 0xff, 0x00 },
{ 175, 0xd7, 0xff, 0x5f }, { 176, 0xd7, 0xff, 0x87 },
{ 177, 0xd7, 0xff, 0xaf }, { 178, 0xd7, 0xff, 0xd7 },
{ 179, 0xd7, 0xff, 0xff }, { 237, 0xda, 0xda, 0xda },
{ 238, 0xe4, 0xe4, 0xe4 }, { 239, 0xee, 0xee, 0xee },
{ 180, 0xff, 0x00, 0x00 }, { 181, 0xff, 0x00, 0x5f },
{ 182, 0xff, 0x00, 0x87 }, { 183, 0xff, 0x00, 0xaf },
{ 184, 0xff, 0x00, 0xd7 }, { 185, 0xff, 0x00, 0xff },
{ 186, 0xff, 0x5f, 0x00 }, { 187, 0xff, 0x5f, 0x5f },
{ 188, 0xff, 0x5f, 0x87 }, { 189, 0xff, 0x5f, 0xaf },
{ 190, 0xff, 0x5f, 0xd7 }, { 191, 0xff, 0x5f, 0xff },
{ 192, 0xff, 0x87, 0x00 }, { 193, 0xff, 0x87, 0x5f },
{ 194, 0xff, 0x87, 0x87 }, { 195, 0xff, 0x87, 0xaf },
{ 196, 0xff, 0x87, 0xd7 }, { 197, 0xff, 0x87, 0xff },
{ 198, 0xff, 0xaf, 0x00 }, { 199, 0xff, 0xaf, 0x5f },
{ 200, 0xff, 0xaf, 0x87 }, { 201, 0xff, 0xaf, 0xaf },
{ 202, 0xff, 0xaf, 0xd7 }, { 203, 0xff, 0xaf, 0xff },
{ 204, 0xff, 0xd7, 0x00 }, { 205, 0xff, 0xd7, 0x5f },
{ 206, 0xff, 0xd7, 0x87 }, { 207, 0xff, 0xd7, 0xaf },
{ 208, 0xff, 0xd7, 0xd7 }, { 209, 0xff, 0xd7, 0xff },
{ 210, 0xff, 0xff, 0x00 }, { 211, 0xff, 0xff, 0x5f },
{ 212, 0xff, 0xff, 0x87 }, { 213, 0xff, 0xff, 0xaf },
{ 214, 0xff, 0xff, 0xd7 }, { 215, 0xff, 0xff, 0xff },
};
int colour_cmp_rgb(const void *, const void *);
/* Compare function for bsearch(). */
int
colour_cmp_rgb(const void *lhs0, const void *rhs0)
{
const struct colour_rgb *lhs = lhs0, *rhs = rhs0;
if (lhs->r < rhs->r)
return (-1);
if (lhs->r > rhs->r)
return (1);
if (lhs->g < rhs->g)
return (-1);
if (lhs->g > rhs->g)
return (1);
if (lhs->b < rhs->b)
return (-1);
if (lhs->b > rhs->b)
return (1);
return (0);
}
/* Work out the nearest colour from the 256 colour set. */
int
colour_find_rgb(u_char r, u_char g, u_char b)
{
struct colour_rgb rgb = { .r = r, .g = g, .b = b }, *found;
u_int distance, lowest, colour, i;
int dr, dg, db;
found = bsearch(&rgb, colour_to_256, nitems(colour_to_256),
sizeof colour_to_256[0], colour_cmp_rgb);
if (found != NULL)
return (16 + found->i);
colour = 16;
lowest = UINT_MAX;
for (i = 0; i < 240; i++) {
dr = (int)colour_from_256[i].r - r;
dg = (int)colour_from_256[i].g - g;
db = (int)colour_from_256[i].b - b;
distance = dr * dr + dg * dg + db * db;
if (distance < lowest) {
lowest = distance;
colour = 16 + i;
}
}
return (colour);
}
/* Set grid cell foreground colour. */
void
colour_set_fg(struct grid_cell *gc, int c)
{
if (c & 0x100)
gc->flags |= GRID_FLAG_FG256;
gc->fg = c;
}
/* Set grid cell background colour. */
void
colour_set_bg(struct grid_cell *gc, int c)
{
if (c & 0x100)
gc->flags |= GRID_FLAG_BG256;
gc->bg = c;
}
/* Convert colour to a string. */
const char *
colour_tostring(int c)
{
static char s[32];
if (c & 0x100) {
xsnprintf(s, sizeof s, "colour%d", c & ~0x100);
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 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 (NULL);
}
/* 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_find_rgb(r, g, b) | 0x100);
}
if (strncasecmp(s, "colour", (sizeof "colour") - 1) == 0) {
n = strtonum(s + (sizeof "colour") - 1, 0, 255, &errstr);
if (errstr != NULL)
return (-1);
return (n | 0x100);
}
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, "default") == 0 || strcmp(s, "8") == 0)
return (8);
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 (-1);
}
/* Convert 256 colour palette to 16. */
u_char
colour_256to16(u_char c)
{
static const u_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]);
}