path: root/localps2pdfprepressgray

#!/bin/sh

set -eu

infile="$1"
outfile="${2:-$(basename "$infile" .pdf)_gray.pdf}"

# https://stackoverflow.com/questions/20128656
gs \
    -sDEVICE=pdfwrite \
    -dPDFSETTINGS=/prepress \
    -sProcessColorModel=DeviceGray \
    -sColorConversionStrategy=Gray \
    -dOverrideICC \
    -o "$outfile" \
    -f "$infile"