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#!/bin/sh
#strip the file name off the input PDF
input_pdf="$1"
file_name="$(find """$1""" | sed 's|\.pdf||g')"
first_page="$2"
last_page="$3"
if [ "$2" = "" ]
then
first_page="1"
else
:
fi
if [ "$3" = "" ]
then
last_page="$first_page"
else
:
fi
#convert the PDF to a 600px wide PNG image
pdftoppm -f "$first_page" -l "$last_page" -png -scale-to-x 696 -scale-to-y -1 "$input_pdf" "$file_name"
#add a 2x2px border to the image.png file
for file in *.png; do
convert "$file" -bordercolor black -border 2x2 "$file"
#compress the image
optipng "$file";
done
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