CMYK Conversion #122
Description
First of all, congratulations for this great tool!
Because of a very specific case, I needed to convert about 6000 colors using its CIELab values, to its corresponding CMYK values and, with this values, feed a color library of a specific application used by print purposes.
As that library is used only for color representation on screen and, being CMYK the only color space interpreted by the application, pastel helped me a lot to achieve my need.
Using pastel + a simple script I made to help me on the bulk conversion, in only one day I was able to make a job that could had took many days, using any other workaround.
Here's the script;
#!/bin/bash
c=""
m=""
y=""
k=""
re='^[0-9]+$'
r=""
g=""
b=""
read r g b
biggest=$r
if [ $g -gt $biggest ]
then
biggest=$g
if [ $b -gt $biggest ]
then
biggest=$b
fi
fi
calc()
{
key=`echo "scale=4;(1-($biggest/255))"|bc -l`
cyan=`echo "scale=4;((1-($r/255)-$key)/(1-$key))"|bc -l`
magenta=`echo "scale=4;((1-($g/255)-$key)/(1-$key))"|bc -l`
yellow=`echo "scale=4;((1-($b/255)-$key)/(1-$key))"|bc -l`
k=`echo "($key*100)" | bc -l | awk '{printf "%.0f\n", $0}'`
c=`echo "($cyan*100)" | bc -l | awk '{printf "%.0f\n", $0}'`
m=`echo "($magenta*100)" | bc -l | awk '{printf "%.0f\n", $0}'`
y=`echo "($yellow*100)" | bc -l | awk '{printf "%.0f\n", $0}'`
} 2> /dev/null
calc
if ! [[ $c =~ $re ]] ; then
c=0
fi
if ! [[ $m =~ $re ]] ; then
m=0
fi
if ! [[ $y =~ $re ]] ; then
y=0
fi
output="cmyk($c $m $y $k)"
if command -v pastel > /dev/null 2>&1 ; then
fg="$(pastel textcolor "rgb($r,$g,$b)")"
pastel paint "$fg" --on "rgb($r,$g,$b)" "$output"
else
echo "$output"
fi
And here, a sample output;
It would be great if some day we have native CMYK convertion in pastel.
Thanks!