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#!/bin/bash # # USAGE: # ./color_convert.sh colormodelayer1,colormodelayer2 input_layer1.pdf,input_layer2.pdf output.pdf # spot colour colormode should look like "spot-COLOR NAME-0 0.64 0.67 0.02" # where COLOR NAME is the name of the colour and 0 0.64 0.67 0.02 are cmyk values from 0 to 1 DEBUG=0 DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd ) function graytospot { [ $DEBUG -eq 1 ] && echo "converting : $1 to $2 \n" #################################################################### #part1: let's put our custom color reference in gray_to_spot.ps IFS='-' read -a args <<< "$2" IFS=' ' read -a color <<< "${args[2]}" unset IFS #args[1] = color name, args[2] = cmyk equivalent in 1 line #color[0] = C, color[1] = M, color[2] = Y, color[3] = K spotcolor="\/spotcolor [\/Separation (${args[1]}) \/DeviceCMYK{dup ${color[0]} mul exch dup ${color[1]} mul exch dup ${color[2]} mul exch ${color[3]} mul}] def" [ $DEBUG -eq 1 ] && echo "spotcolor : $spotcolor \n" sed -i "s/^\/spotcolor.*$/$spotcolor/g" $DIR/gray_to_spot.ps #endpart1 ###################################################################### #part2: convert to ps file using pdftops pdftops "$1" psfile="${1/.pdf/.ps}" ###################################################################### #part3: modify bitmap decode from [0 1] to [1 0] in generated ps sed -i -e 's/Decode \[0 1\]/Decode [1 0]/g' "$psfile" ###################################################################### #part4: convert back to pdf using gray_to_spot.ps gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile="$1" $DIR/gray_to_spot.ps "$psfile" ###################################################################### #part5: remove ps file [ $DEBUG -eq 0 ] && rm "$psfile" } IFS=',' read -a layers <<< "$1" IFS=',' read -a input_files <<< "$2" unset IFS if [ $DEBUG -eq 1 ]; then echo "layers : \n"; printf '%s\n' "${layers[@]}"; fi if [ $DEBUG -eq 1 ]; then echo "files : \n"; printf '%s\n' "${input_files[@]}"; fi #loop on files and convert them according to layers colormodes for index in "${!layers[@]}" do echo "${input_files[index]} ${layers[index]}" if [ "${layers[index]}" = "black" ] || [[ "${layers[index]}" == spot* ]]; then gs \ -dNOPAUSE \ -dBATCH \ -sDEVICE=pdfwrite \ -sProcessColorModel=DeviceGray \ -sColorConversionStrategy=Gray \ -sDefaultCMYKProfile=ps_cmyk.icc \ -dOverrideICC \ -sOutputFile="${input_files[index]/.pdf/-tmp.pdf}" "${input_files[index]}" if [[ "${layers[index]}" == spot* ]]; then graytospot "${input_files[index]/.pdf/-tmp.pdf}" "${layers[index]}" fi elif [ "${layers[index]}" = "cmyk" ]; then gs \ -dNOPAUSE \ -dBATCH \ -sDEVICE=pdfwrite \ -dProcessColorModel=/DeviceCMYK \ -sColorConversionStrategy=CMYK \ -sDefaultCMYKProfile=ps_cmyk.icc \ -dOverrideICC \ -sOutputFile="${input_files[index]/.pdf/-tmp.pdf}" "${input_files[index]}" fi if [ $DEBUG -eq 0 ]; then rm "${input_files[index]}" fi done ####IF SINGLE LAYER if [ ${#layers[@]} = 1 ]; then mv "${input_files[0]/.pdf/-tmp.pdf}" "$3" exit fi ####ELSE OVERLAY inputFile="${input_files[0]/.pdf/-tmp.pdf}" for(( i=1; i < ${#layers[@]}; i++ )) do pdftk "$inputFile" multistamp "${input_files[i]/.pdf/-tmp.pdf}" output "${3/.pdf/$i.pdf}" if [ $DEBUG -eq 0 ]; then rm "$inputFile" rm "${input_files[i]/.pdf/-tmp.pdf}" fi inputFile="${3/.pdf/$i.pdf}" done lastFileN=$(expr ${#layers[@]} - 1) mv "${3/.pdf/$lastFileN.pdf}" "$3" echo "done" exit