Scaling PDFs with GhostScript under linux
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#! /bin/bash | |
# modified from SO: http://stackoverflow.com/a/25932668/786559 | |
input=$2 | |
output=$(echo $2 | sed s/.pdf/_scaled.pdf/) | |
if [ $# -ne 2 ] ; then | |
echo "Bad arguments!" | |
exit | |
fi | |
# assume 0<=$1<=100 (no error checks!) | |
xx="595" #width of A4 in post script points | |
yy="842" #height of A4 in pps | |
ss=$(echo "scale=4; $1 / 2" | bc) | |
sx=$(echo "scale=4; ${xx}"'*'"( ${ss}/ 100 )" | bc) | |
sy=$(echo "scale=4; ${yy}"'*'"( ${ss}/ 100 )" | bc) | |
s=$(echo "scale=4; 1 - $1 / 100" | bc) | |
gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -dSAFER \ | |
-dCompatibilityLevel="1.3" -dPDFSETTINGS="/screen" \ | |
-dSubsetFonts=true -dEmbedAllFonts=true \ | |
-sPAPERSIZE=a4 -sOutputFile="${output}" \ | |
-c "<</BeginPage{${s} ${s} scale ${sx} ${sy} translate}>> setpagedevice" \ | |
-f "$input" |
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