get_rgb_image.sh

#!/usr/bin/env bash
set -eou pipefail
cd "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
HEIGHT=5

icat="kitty +kitten icat"
R=${1:-100}
G=${2:-100}
B=${3:-100}
VIEW=${4:-0}
RESIZE=${RESIZE:-1}
RESIZE_WIDTH=${RESIZE_WIDTH:-40}
RESIZE_HEIGHT=${RESIZE_HEIGHT:-20}

PNG=pngs/color-$R-$G-$B.png
PNG_RESIZED=pngs/color-resized-$R-$G-$B-${RESIZE_WIDTH}x${RESIZE_HEIGHT}.png
ANS=pngs/color-$R-$G-$B.ansi

if [[ ! -f $ANS ]]; then
    for x in $(seq 1 $HEIGHT); do
        ansi -n --bg-rgb=$R,$G,$B "                              " >>$ANS
    done
fi

[[ -f "$PNG" ]] || ansi2png --png --xsize 30 --ysize $HEIGHT $ANS $PNG 2>/dev/null

resize() {
    [[ -f "$PNG" ]] && [[ ! -f "$PNG_RESIZED" ]] && magick -extract ${RESIZE_WIDTH}x${RESIZE_HEIGHT}+0+0 $PNG $PNG_RESIZED
    true
}

if [[ "$RESIZE" == 1 ]]; then
    resize
    [[ -f "$PNG_RESIZED" ]] && [[ "$VIEW" == 1 ]] && $icat $PNG_RESIZED || echo -e "$(pwd)/$PNG_RESIZED"
else
    [[ -f "$PNG" ]] && [[ "$VIEW" == 1 ]] && $icat $PNG || echo -e "$(pwd)/$PNG"
fi

true