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matelight/host/color.c

296 lines
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C
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#include "color.h"
#include <stdlib.h>
#include <stdio.h>
/* Bonus points for time wasted on C golf for improving the efficiency of this part */
int xterm_color_index(color_t c){
int candidate = 0;
int best_distance = 0x7fffffff;
for(int i=0; i<256; i++){
color_t k = colortable[i];
int tmp = abs(c.r - k.r);
tmp *= tmp;
int distance = tmp;
if(distance > best_distance)
continue;
tmp = abs(c.g - k.g);
tmp *= tmp;
distance += tmp;
if(distance > best_distance)
continue;
tmp = abs(c.b - k.b);
tmp *= tmp;
distance += tmp;
if(distance > best_distance)
continue;
best_distance = distance;
candidate = i;
}
return candidate;
}
/* Generated by genpal.py */
color_t colortable[256] = {
/* 16 default ANSI colors */
{0x00, 0x00, 0x00},
{0xa8, 0x00, 0x00},
{0x00, 0xa8, 0x00},
{0xa8, 0x54, 0x00},
{0x00, 0x00, 0xa8},
{0xa8, 0x00, 0xa8},
{0x00, 0xa8, 0xa8},
{0xa8, 0xa8, 0xa8},
{0x54, 0x54, 0x54},
{0xfc, 0x54, 0x54},
{0x54, 0xfc, 0x54},
{0xfc, 0xfc, 0x54},
{0x54, 0x54, 0xfc},
{0xfc, 0x54, 0xfc},
{0x54, 0xfc, 0xfc},
{0xfc, 0xfc, 0xfc},
/* 6x6x6 color cube */
{0x00, 0x00, 0x00},
{0x00, 0x00, 0x5f},
{0x00, 0x00, 0x87},
{0x00, 0x00, 0xaf},
{0x00, 0x00, 0xd7},
{0x00, 0x00, 0xff},
{0x00, 0x5f, 0x00},
{0x00, 0x5f, 0x5f},
{0x00, 0x5f, 0x87},
{0x00, 0x5f, 0xaf},
{0x00, 0x5f, 0xd7},
{0x00, 0x5f, 0xff},
{0x00, 0x87, 0x00},
{0x00, 0x87, 0x5f},
{0x00, 0x87, 0x87},
{0x00, 0x87, 0xaf},
{0x00, 0x87, 0xd7},
{0x00, 0x87, 0xff},
{0x00, 0xaf, 0x00},
{0x00, 0xaf, 0x5f},
{0x00, 0xaf, 0x87},
{0x00, 0xaf, 0xaf},
{0x00, 0xaf, 0xd7},
{0x00, 0xaf, 0xff},
{0x00, 0xd7, 0x00},
{0x00, 0xd7, 0x5f},
{0x00, 0xd7, 0x87},
{0x00, 0xd7, 0xaf},
{0x00, 0xd7, 0xd7},
{0x00, 0xd7, 0xff},
{0x00, 0xff, 0x00},
{0x00, 0xff, 0x5f},
{0x00, 0xff, 0x87},
{0x00, 0xff, 0xaf},
{0x00, 0xff, 0xd7},
{0x00, 0xff, 0xff},
{0x5f, 0x00, 0x00},
{0x5f, 0x00, 0x5f},
{0x5f, 0x00, 0x87},
{0x5f, 0x00, 0xaf},
{0x5f, 0x00, 0xd7},
{0x5f, 0x00, 0xff},
{0x5f, 0x5f, 0x00},
{0x5f, 0x5f, 0x5f},
{0x5f, 0x5f, 0x87},
{0x5f, 0x5f, 0xaf},
{0x5f, 0x5f, 0xd7},
{0x5f, 0x5f, 0xff},
{0x5f, 0x87, 0x00},
{0x5f, 0x87, 0x5f},
{0x5f, 0x87, 0x87},
{0x5f, 0x87, 0xaf},
{0x5f, 0x87, 0xd7},
{0x5f, 0x87, 0xff},
{0x5f, 0xaf, 0x00},
{0x5f, 0xaf, 0x5f},
{0x5f, 0xaf, 0x87},
{0x5f, 0xaf, 0xaf},
{0x5f, 0xaf, 0xd7},
{0x5f, 0xaf, 0xff},
{0x5f, 0xd7, 0x00},
{0x5f, 0xd7, 0x5f},
{0x5f, 0xd7, 0x87},
{0x5f, 0xd7, 0xaf},
{0x5f, 0xd7, 0xd7},
{0x5f, 0xd7, 0xff},
{0x5f, 0xff, 0x00},
{0x5f, 0xff, 0x5f},
{0x5f, 0xff, 0x87},
{0x5f, 0xff, 0xaf},
{0x5f, 0xff, 0xd7},
{0x5f, 0xff, 0xff},
{0x87, 0x00, 0x00},
{0x87, 0x00, 0x5f},
{0x87, 0x00, 0x87},
{0x87, 0x00, 0xaf},
{0x87, 0x00, 0xd7},
{0x87, 0x00, 0xff},
{0x87, 0x5f, 0x00},
{0x87, 0x5f, 0x5f},
{0x87, 0x5f, 0x87},
{0x87, 0x5f, 0xaf},
{0x87, 0x5f, 0xd7},
{0x87, 0x5f, 0xff},
{0x87, 0x87, 0x00},
{0x87, 0x87, 0x5f},
{0x87, 0x87, 0x87},
{0x87, 0x87, 0xaf},
{0x87, 0x87, 0xd7},
{0x87, 0x87, 0xff},
{0x87, 0xaf, 0x00},
{0x87, 0xaf, 0x5f},
{0x87, 0xaf, 0x87},
{0x87, 0xaf, 0xaf},
{0x87, 0xaf, 0xd7},
{0x87, 0xaf, 0xff},
{0x87, 0xd7, 0x00},
{0x87, 0xd7, 0x5f},
{0x87, 0xd7, 0x87},
{0x87, 0xd7, 0xaf},
{0x87, 0xd7, 0xd7},
{0x87, 0xd7, 0xff},
{0x87, 0xff, 0x00},
{0x87, 0xff, 0x5f},
{0x87, 0xff, 0x87},
{0x87, 0xff, 0xaf},
{0x87, 0xff, 0xd7},
{0x87, 0xff, 0xff},
{0xaf, 0x00, 0x00},
{0xaf, 0x00, 0x5f},
{0xaf, 0x00, 0x87},
{0xaf, 0x00, 0xaf},
{0xaf, 0x00, 0xd7},
{0xaf, 0x00, 0xff},
{0xaf, 0x5f, 0x00},
{0xaf, 0x5f, 0x5f},
{0xaf, 0x5f, 0x87},
{0xaf, 0x5f, 0xaf},
{0xaf, 0x5f, 0xd7},
{0xaf, 0x5f, 0xff},
{0xaf, 0x87, 0x00},
{0xaf, 0x87, 0x5f},
{0xaf, 0x87, 0x87},
{0xaf, 0x87, 0xaf},
{0xaf, 0x87, 0xd7},
{0xaf, 0x87, 0xff},
{0xaf, 0xaf, 0x00},
{0xaf, 0xaf, 0x5f},
{0xaf, 0xaf, 0x87},
{0xaf, 0xaf, 0xaf},
{0xaf, 0xaf, 0xd7},
{0xaf, 0xaf, 0xff},
{0xaf, 0xd7, 0x00},
{0xaf, 0xd7, 0x5f},
{0xaf, 0xd7, 0x87},
{0xaf, 0xd7, 0xaf},
{0xaf, 0xd7, 0xd7},
{0xaf, 0xd7, 0xff},
{0xaf, 0xff, 0x00},
{0xaf, 0xff, 0x5f},
{0xaf, 0xff, 0x87},
{0xaf, 0xff, 0xaf},
{0xaf, 0xff, 0xd7},
{0xaf, 0xff, 0xff},
{0xd7, 0x00, 0x00},
{0xd7, 0x00, 0x5f},
{0xd7, 0x00, 0x87},
{0xd7, 0x00, 0xaf},
{0xd7, 0x00, 0xd7},
{0xd7, 0x00, 0xff},
{0xd7, 0x5f, 0x00},
{0xd7, 0x5f, 0x5f},
{0xd7, 0x5f, 0x87},
{0xd7, 0x5f, 0xaf},
{0xd7, 0x5f, 0xd7},
{0xd7, 0x5f, 0xff},
{0xd7, 0x87, 0x00},
{0xd7, 0x87, 0x5f},
{0xd7, 0x87, 0x87},
{0xd7, 0x87, 0xaf},
{0xd7, 0x87, 0xd7},
{0xd7, 0x87, 0xff},
{0xd7, 0xaf, 0x00},
{0xd7, 0xaf, 0x5f},
{0xd7, 0xaf, 0x87},
{0xd7, 0xaf, 0xaf},
{0xd7, 0xaf, 0xd7},
{0xd7, 0xaf, 0xff},
{0xd7, 0xd7, 0x00},
{0xd7, 0xd7, 0x5f},
{0xd7, 0xd7, 0x87},
{0xd7, 0xd7, 0xaf},
{0xd7, 0xd7, 0xd7},
{0xd7, 0xd7, 0xff},
{0xd7, 0xff, 0x00},
{0xd7, 0xff, 0x5f},
{0xd7, 0xff, 0x87},
{0xd7, 0xff, 0xaf},
{0xd7, 0xff, 0xd7},
{0xd7, 0xff, 0xff},
{0xff, 0x00, 0x00},
{0xff, 0x00, 0x5f},
{0xff, 0x00, 0x87},
{0xff, 0x00, 0xaf},
{0xff, 0x00, 0xd7},
{0xff, 0x00, 0xff},
{0xff, 0x5f, 0x00},
{0xff, 0x5f, 0x5f},
{0xff, 0x5f, 0x87},
{0xff, 0x5f, 0xaf},
{0xff, 0x5f, 0xd7},
{0xff, 0x5f, 0xff},
{0xff, 0x87, 0x00},
{0xff, 0x87, 0x5f},
{0xff, 0x87, 0x87},
{0xff, 0x87, 0xaf},
{0xff, 0x87, 0xd7},
{0xff, 0x87, 0xff},
{0xff, 0xaf, 0x00},
{0xff, 0xaf, 0x5f},
{0xff, 0xaf, 0x87},
{0xff, 0xaf, 0xaf},
{0xff, 0xaf, 0xd7},
{0xff, 0xaf, 0xff},
{0xff, 0xd7, 0x00},
{0xff, 0xd7, 0x5f},
{0xff, 0xd7, 0x87},
{0xff, 0xd7, 0xaf},
{0xff, 0xd7, 0xd7},
{0xff, 0xd7, 0xff},
{0xff, 0xff, 0x00},
{0xff, 0xff, 0x5f},
{0xff, 0xff, 0x87},
{0xff, 0xff, 0xaf},
{0xff, 0xff, 0xd7},
{0xff, 0xff, 0xff},
/* 24-Grayscale slide */
{0x00, 0x00, 0x00},
{0x12, 0x12, 0x12},
{0x1c, 0x1c, 0x1c},
{0x26, 0x26, 0x26},
{0x30, 0x30, 0x30},
{0x3a, 0x3a, 0x3a},
{0x44, 0x44, 0x44},
{0x4e, 0x4e, 0x4e},
{0x58, 0x58, 0x58},
{0x62, 0x62, 0x62},
{0x6c, 0x6c, 0x6c},
{0x76, 0x76, 0x76},
{0x80, 0x80, 0x80},
{0x8a, 0x8a, 0x8a},
{0x94, 0x94, 0x94},
{0x9e, 0x9e, 0x9e},
{0xa8, 0xa8, 0xa8},
{0xb2, 0xb2, 0xb2},
{0xbc, 0xbc, 0xbc},
{0xc6, 0xc6, 0xc6},
{0xd0, 0xd0, 0xd0},
{0xda, 0xda, 0xda},
{0xe4, 0xe4, 0xe4},
{0xee, 0xee, 0xee}
};
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