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executable file 39 lines (28 sloc) 829 Bytes
#! /bin/bash
# CONVERTS RGB PDF TO CMYK PDF PRESERVING TRUE BLACK FOR VECTORS
# OVERPRINT FEATURE IS AVAILABLE WITH AN OPTION
# USAGE:
# ./rgb2cmyk.sh input.pdf
# ./rgb2cmyk.sh input.pdf overprint
# OUTPUT:
# input-cmyk.pdf
# input-cmyk-op.pdf (in case of overprint)
bn=$(basename $1 ".pdf")
op=$2
pdftops ${bn}.pdf
gs \
-dNOPAUSE \
-dBATCH \
-sDEVICE=pdfwrite \
-dProcessColorModel=/DeviceCMYK \
-sColorConversionStrategy=CMYK \
-sOutputFile=${bn}-cmyk.pdf ./forceblack.ps ${bn}.ps
if [ $op == overprint ]
then
pdftops -level2sep ${bn}-cmyk.pdf
sed -e "s/false \(op\)/true \1/gI" ${bn}-cmyk.ps > ${bn}-cmyk-op.ps
gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=${bn}-cmyk-op.pdf ./forceblack.ps ${bn}-cmyk-op.ps
rm ${bn}-cmyk.pdf
rm ${bn}-cmyk.ps
fi
rm ${bn}.ps