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#!/bin/sh
#strip the file name off the input PDF
file="$(ls ""$1"" | sed 's|\.pdf||g')"
#convert the PDF to a 600px wide PNG image
pdftoppm -singlefile -png -scale-to-x 696 -scale-to-y -1 "$1" "$file"
#add a 2x2px border to the image.png file
convert "$file".png -bordercolor black -border 2x2 "$file".png
#compress the image
optipng "$file".png
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