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Crop pdfs with GhostScript
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#!/usr/bin/env bash | |
set -euo pipefail | |
origdir=$(pwd) | |
tmpdir=$(mktemp -d) | |
echo "tmpdir: $tmpdir" | |
read -r width height < <(pdfinfo $1 | grep "Page size:" | sed 's/[a-zA-Z: ]*\([0-9]\+\)[x ]*\([0-9]\+\).*/\1 \2/') | |
npages=$(pdfinfo $1 | grep "Pages:" | sed 's/Pages: \+\([0-9]\+\).*/\1/') | |
echo "page count: $npages" | |
echo "(width, height) = ($width, $height)" | |
cp $1 $tmpdir/orig.pdf | |
cd $tmpdir | |
margleft=$2 | |
margtop=$3 | |
margright=$4 | |
margbot=$5 | |
left=$margleft | |
top=$((height-margtop)) | |
right=$((width-margright)) | |
bot=$margbot | |
echo -e "bbox:\n left: $left\n right: $right\n bot: $bot\n top: $top" | |
# Remove any cropbox already present | |
sed -i 's/CropBox/cROPbOX/g' orig.pdf | |
getTime() { | |
date +%s.%N | sed 's/[^0-9]//' | |
} | |
startTime=$(getTime) | |
elapsed() { | |
local timeNow=$(getTime) | |
echo $((timeNow-startTime)) | |
} | |
case "$6" in | |
end) | |
pageExtents='' | |
;; | |
*) | |
pageExtents="-dLastPage=$6" | |
;; | |
esac | |
# Crop | |
echo "cropping" | |
ls | |
gs $pageExtents -o cropped.pdf -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -c "[/CropBox [$left $bot $right $top]" -c " /PAGES pdfmark" -f orig.pdf \ | |
| grep --line-buffered '^Page' \ | |
| sed --unbuffered 's/[^0-9]//g' \ | |
| sed --unbuffered "s/.*/echo \"& (\$(( ( \$(date +%s.%N | sed 's:[^0-9]::') - $startTime )\/1000000000 ))s elapsed, estimated \$(( ( (\$(date +%s.%N | sed 's:[^0-9]::') - $startTime)\/100000000) * ($npages - &) \/ (& * 10) ))s remaining)\"/ep" \ | |
| stdbuf -o0 tr '\n' '\r' | |
echo "" | |
# | sed --unbuffered "s/Page \([0-9]\+\)/converted page \1 of $npages/" \ | |
mv cropped.pdf $origdir/crop-$1 | |
ls -l $origdir/crop-$1 |
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