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#!/bin/sh
##############################################################################
# Copyright 2020 Thomas E. Dickey #
# Copyright 2016 Free Software Foundation, Inc. #
# #
# Permission is hereby granted, free of charge, to any person obtaining a #
# copy of this software and associated documentation files (the "Software"), #
# to deal in the Software without restriction, including without limitation #
# the rights to use, copy, modify, merge, publish, distribute, distribute #
# with modifications, sublicense, and/or sell copies of the Software, and to #
# permit persons to whom the Software is furnished to do so, subject to the #
# following conditions: #
# #
# The above copyright notice and this permission notice shall be included in #
# all copies or substantial portions of the Software. #
# #
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR #
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, #
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL #
# THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER #
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING #
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER #
# DEALINGS IN THE SOFTWARE. #
# #
# Except as contained in this notice, the name(s) of the above copyright #
# holders shall not be used in advertising or otherwise to promote the sale, #
# use or other dealings in this Software without prior written #
# authorization. #
##############################################################################
# $Id: tput-colorcube,v 1.2 2020/02/02 23:34:34 tom Exp $
# Use this script to print an xterm-style color cube, e.g., as done in
# the xterm 88colors2.pl and 256colors2.pl scripts.
failed() {
printf "?? $*\n" >&2
exit 1
}
newline() {
tput op
printf "\n"
}
if [ $# = 1 ]
then
myterm=$1
elif [ $# = 0 ]
then
myterm=$TERM
else
failed "expected one parameter or none"
fi
colors=$(tput -T $myterm colors 2>/dev/null)
if [ ${colors:-0} -le 0 ]
then
myterm=${myterm%%-color}
colors=$(tput -T $myterm colors 2>/dev/null)
fi
if [ ${colors:-0} -le 0 ]
then
failed "terminal $myterm does not support color"
fi
printf "System colors:\n"
color=0
inrow=$colors
to_do=$colors
[ $colors -gt 256 ] && colors=256
[ $inrow -gt 8 ] && inrow=8
[ $to_do -gt 16 ] && to_do=16
while [ $color -lt $to_do ]
do
[ $color = $inrow ] && newline
tput setab $color
printf ' '
color=$(expr $color + 1)
done
newline
[ $colors -le 16 ] && exit
if [ $colors = 256 ]
then
cube=6
ramp=232
elif [ $colors -ge 88 ]
then
cube=4
ramp=80
else
exit
fi
printf "\n"
printf "Color cube, ${cube}x${cube}x${cube}:\n"
g=0
cube2=$(expr $cube \* $cube)
while [ $g -lt $cube ]
do
r=0
while [ $r -lt $cube ]
do
b=0
while [ $b -lt $cube ]
do
color=$(expr 16 + \( $r \* $cube2 \) + \( $g \* $cube \) + $b)
tput setab $color
printf ' '
b=$(expr $b + 1)
done
tput op
printf ' '
r=$(expr $r + 1)
done
newline
g=$(expr $g + 1)
done
printf "\n"
printf "Grayscale ramp:\n"
color=$ramp
while [ $color -lt $colors ]
do
tput setab $color
printf ' '
color=$(expr $color + 1)
done
newline
# vi:ts=4 sw=4
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