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#!/bin/bash
# Based on: https://gist.github.com/XVilka/8346728
# From: https://unix.stackexchange.com/questions/404414/print-truecolor-24-bit-test-pattern
# You can also call it as:
# width=1000 truecolor-test
# for a wider pattern.
awk -v term_cols="${width:-$(tput cols || echo 80)}" 'BEGIN{
s="/\\";
for (colnum = 0; colnum<term_cols; colnum++) {
r = 255-(colnum*255/term_cols);
g = (colnum*510/term_cols);
b = (colnum*255/term_cols);
if (g>255) g = 510-g;
printf "\033[48;2;%d;%d;%dm", r,g,b;
printf "\033[38;2;%d;%d;%dm", 255-r,255-g,255-b;
printf "%s\033[0m", substr(s,colnum%2+1,1);
}
printf "\n";
}'
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