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|
#!/bin/bash
USAGE="$(basename "$0") [OPTION]... [FILE]
Replace all colors found in input file with the closest from
specified palette. Supports HEX RGB and RGBA colors.
Options:
-p FILE, --palette FILE \t read palette colors from FILE
-x, --hex \t use hex colors as replacement
-v, --verbose \t print color modifications
-c, --color \t colorize the output
-h, --help \t show this help text"
FILES=()
PALETTE_FILE=''
while [[ $# -gt 0 ]]
do
key="$1"
case $key in
-p|--palette)
PALETTE_FILE="$2"
shift # past argument
shift # past value
;;
-x|--hex)
HEX=1
shift # past argument
;;
-v|--verbose)
VERBOSE=1
shift # past argument
;;
-c|--color)
COLOR=1
shift # past argument
;;
-h|--help)
echo -e "$USAGE"
exit 0
;;
*) # files
FILES+=("$1")
shift # past argument
;;
esac
done
if [[ ${FILES[@]} == '' || $PALETTE_FILE == '' ]]
then
echo -e "$USAGE"
exit 0
fi
function parse_color {
color="$1"
if [[ ${color:0:1} = "#" ]]
then
if [[ $(wc -c <<< $color) = 5 ]]
then
color="#${color:1:1}${color:1:1}${color:2:1}${color:2:1}${color:3:1}${color:3:1}"
fi
echo "$((0x${color:1:2})) $((0x${color:3:2})) $((0x${color:5:2}))"
elif [[ ${color:0:3} = "rgb" ]]
then
colors=($(grep -o -P "\d+(\.\d+)?" <<< $color))
if [[ $(grep -o "%" <<< $color | wc -l) > 0 ]]
then
printf "%s %s %s" \
$(echo "${colors[0]} * 255/100" | bc) \
$(echo "${colors[1]} * 255/100" | bc) \
$(echo "${colors[2]} * 255/100" | bc)
else
echo "${colors[0]} ${colors[1]} ${colors[2]}"
fi
fi
}
palette_colors=$(for color in $(cat "$PALETTE_FILE")
do
echo $(parse_color $color)
done)
function find_nearest_color {
r1=$1; g1=$2; b1=$3
color1=($r $g $b)
smallest_distance=765
while read -r palette_color
do
color2=($palette_color)
r2=${color2[0]}; g2=${color2[1]}; b2=${color2[2]}
if [[ ${color1[@]} == ${color2[@]} ]]
then
best_color=$palette_color
break
fi
distance=$(echo "scale=3;sqrt(2*($r2-$r1)^2 + 4*($g2-$g1)^2 + 3*($b2-$b1)^2)" | bc)
if (( $(echo "$distance < $smallest_distance" | bc) ))
then
smallest_distance=$distance
best_color=$palette_color
fi
done <<< $palette_colors
echo $best_color
}
colors_regex='#([\da-f]{3}){1,2}(?![\d\w])|rgb(a)?\(\s*\d{1,3}(\.\d+)?%?(\s*,\s*\d{1,3}(\.\d+)?%?){2}(\s*,\s*(1|\d?\.\d+))?\s*\)'
for file in ${FILES[@]}
do
printf "\n $file\n"
(( $VERBOSE )) && printf '%*s\n\n' "${COLUMNS:-$(tput cols)}" '' | tr ' ' '_'
file_colors=$(grep -o -P -i $colors_regex "$file" | sort -u)
[[ $file_colors = '' ]] && continue
while read -r file_color
do
parsed_color=($(parse_color "$file_color"))
new_color=($(find_nearest_color ${parsed_color[@]}))
if [[ ${file_color:0:4} == 'rgba' ]]
then
alpha=$(grep -o -P "\d*(\.\d+)?" <<< $file_color | tail -1)
new_color_formated="rgba(${new_color[0]}, ${new_color[1]}, ${new_color[2]}, $alpha)"
elif (( HEX ))
then
new_color_formated=$(printf '#%02x%02x%02x' \
${new_color[0]} ${new_color[1]} ${new_color[2]})
else
new_color_formated="rgb(${new_color[0]}, ${new_color[1]}, ${new_color[2]})"
fi
sed "s/$file_color/$new_color_formated/g" -i "$file"
if (( $VERBOSE ))
then
printf " %s%-24s %s => %s %24s%s\n" \
$((( $COLOR )) && printf "\x1b[38;2;${parsed_color[0]};${parsed_color[1]};${parsed_color[2]}m" || printf '') \
"$file_color" \
$((( $COLOR )) && printf "\x1b[48;2;${parsed_color[0]};${parsed_color[1]};${parsed_color[2]}m..\x1b[0m" || printf '') \
$((( $COLOR )) && printf "\x1b[38;2;${new_color[0]};${new_color[1]};${new_color[2]}m\x1b[48;2;${new_color[0]};${new_color[1]};${new_color[2]}m..\x1b[0m\x1b[38;2;${new_color[0]};${new_color[1]};${new_color[2]}m" || printf '') \
"$new_color_formated" \
$((( $COLOR )) && printf "\x1b[0m" || printf '')
fi
done <<< $file_colors
done
|
