pdf2jpg

pdf2jpg.sh

#!/bin/bash

echo "start convert pdf to jpeg"

#command line
sdir=$(dirname $0)
gs_cli=$sdir'/gs'
convert_cli='/usr/bin/convert'
id_cli='/usr/bin/identify'

#argv
pdf=$1
jpg=$2
width=$3

#calc width & heigth
$gs_cli  \
    -dBATCH \
    -dNOPAUSE \
    -q \
    -sDEVICE=jpeg   \
    -o /tmp/_pdf_tmp.jpg  \
    -dJPEGQ=100  \
    -dFirstPage=1 \
    -dLastPage=1 \
    -r300 \
    $pdf


rateexp=`$id_cli /tmp/_pdf_tmp.jpg |awk '{print $3}'|sed 's/x/\//g'`

rate=`echo 'scale=4;'$rateexp|bc`

heigth=`echo $width'/'$rate|bc`

rm  -rf /tmp/_pdf_tmp.jpg

rx=$width'x'$heigth

echo $rx

if [ ! -d '/tmp/pdfjpg' ]; then
mkdir /tmp/pdfjpg
fi

cd /tmp/pdfjpg
$gs_cli  \
    -dBATCH \
    -dNOPAUSE \
    -q \
    -sDEVICE=jpeg   \
    -o $jpg'_%03d.jpg'  \
    -dJPEGQ=100   \
    -r100         \
    -g$rx        \
    $pdf



echo "start merge jpeg"
$convert_cli -append $jpg'_*.jpg' $jpg'.jpg'

echo "start resize jpeg"

$convert_cli $jpg'.jpg' -strip -quality 75% -resize $width'x' $jpg'_min.jpg'

echo "finish"


rm -rf ./$jpg'_*.jpg'
exit