터미널 에뮬레이터 256 색상 지원 확인 스크립트

24-bit-color.sh

#!/bin/bash
# This file was originally taken from iterm2 https://github.com/gnachman/iTerm2/blob/master/tests/24-bit-color.sh
#
#   This file echoes a bunch of 24-bit color codes
#   to the terminal to demonstrate its functionality.
#   The foreground escape sequence is ^[38;2;<r>;<g>;<b>m
#   The background escape sequence is ^[48;2;<r>;<g>;<b>m
#   <r> <g> <b> range from 0 to 255 inclusive.
#   The escape sequence ^[0m returns output to default

setBackgroundColor()
{
    #printf '\x1bPtmux;\x1b\x1b[48;2;%s;%s;%sm' $1 $2 $3
    printf '\x1b[48;2;%s;%s;%sm' $1 $2 $3
}

resetOutput()
{
    echo -en "\x1b[0m\n"
}

# Gives a color $1/255 % along HSV
# Who knows what happens when $1 is outside 0-255
# Echoes "$red $green $blue" where
# $red $green and $blue are integers
# ranging between 0 and 255 inclusive
rainbowColor()
{ 
    let h=$1/43
    let f=$1-43*$h
    let t=$f*255/43
    let q=255-t

    if [ $h -eq 0 ]
    then
        echo "255 $t 0"
    elif [ $h -eq 1 ]
    then
        echo "$q 255 0"
    elif [ $h -eq 2 ]
    then
        echo "0 255 $t"
    elif [ $h -eq 3 ]
    then
        echo "0 $q 255"
    elif [ $h -eq 4 ]
    then
        echo "$t 0 255"
    elif [ $h -eq 5 ]
    then
        echo "255 0 $q"
    else
        # execution should never reach here
        echo "0 0 0"
    fi
}

for i in `seq 0 127`; do
    setBackgroundColor $i 0 0
    echo -en " "
done
resetOutput
for i in `seq 255 -1 128`; do
    setBackgroundColor $i 0 0
    echo -en " "
done
resetOutput

for i in `seq 0 127`; do
    setBackgroundColor 0 $i 0
    echo -n " "
done
resetOutput
for i in `seq 255 -1 128`; do
    setBackgroundColor 0 $i 0
    echo -n " "
done
resetOutput

for i in `seq 0 127`; do
    setBackgroundColor 0 0 $i
    echo -n " "
done
resetOutput
for i in `seq 255 -1 128`; do
    setBackgroundColor 0 0 $i
    echo -n " "
done
resetOutput

for i in `seq 0 127`; do
    setBackgroundColor `rainbowColor $i`
    echo -n " "
done
resetOutput
for i in `seq 255 -1 128`; do
    setBackgroundColor `rainbowColor $i`
    echo -n " "
done
resetOutput

color-spaces.pl

#!/usr/bin/perl
# Author: Todd Larason <[email protected]>
# $XFree86: xc/programs/xterm/vttests/256colors2.pl,v 1.1 1999/07/11 08:49:54 dawes Exp $

print "256 color mode\n\n";

# display back ground colors

for ($fgbg = 38; $fgbg <= 48; $fgbg +=10) {

# first the system ones:
print "System colors:\n";
for ($color = 0; $color < 8; $color++) {
    print "\x1b[${fgbg};5;${color}m::";
}
print "\x1b[0m\n";
for ($color = 8; $color < 16; $color++) {
    print "\x1b[${fgbg};5;${color}m::";
}
print "\x1b[0m\n\n";

# now the color cube
print "Color cube, 6x6x6:\n";
for ($green = 0; $green < 6; $green++) {
    for ($red = 0; $red < 6; $red++) {
	for ($blue = 0; $blue < 6; $blue++) {
	    $color = 16 + ($red * 36) + ($green * 6) + $blue;
	    print "\x1b[${fgbg};5;${color}m::";
	}
	print "\x1b[0m ";
    }
    print "\n";
}

# now the grayscale ramp
print "Grayscale ramp:\n";
for ($color = 232; $color < 256; $color++) {
    print "\x1b[${fgbg};5;${color}m::";
}
print "\x1b[0m\n\n";

}

print "Examples for the 3-byte color mode\n\n";

for ($fgbg = 38; $fgbg <= 48; $fgbg +=10) {

# now the color cube
print "Color cube\n";
for ($green = 0; $green < 256; $green+=51) {
    for ($red = 0; $red < 256; $red+=51) {
	for ($blue = 0; $blue < 256; $blue+=51) {
            print "\x1b[${fgbg};2;${red};${green};${blue}m::";
	}
	print "\x1b[0m ";
    }
    print "\n";
}

# now the grayscale ramp
print "Grayscale ramp:\n";
for ($gray = 8; $gray < 256; $gray+=10) {
    print "\x1b[${fgbg};2;${gray};${gray};${gray}m::";
}
print "\x1b[0m\n\n";

}