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reduce PDF file size by optimising it for screen viewing
#!/bin/bash
# copied from http://www.tatome.de/bliki/doku.php?id=projects:shrinkpdf
if [ $# -lt 2 ] || [ $# -gt 3 ]; then
echo usage: shrinkpdf \<filename\> \<resolution\> \[\<output\>\]
exit
fi
if [ ! -e "$1" ]; then
echo "$1" does not exist. Exiting.
exit
fi
if [ $# = 3 ]; then
NEWNAME=$3
else
NEWNAME=`basename $1 .pdf`_shrinked.pdf
fi
if [ "$1 " = "$NEWNAME " ]; then
echo Input and output are identical. Won\'t overwrite---exiting.
exit
fi
if [ -e "$NEWNAME" ]; then
echo "$NEWNAME" exists. Delete? \(y/n\)
read ANS
if [ "$ANS " = "y " ]; then
rm "$NEWNAME"
else
exit
fi
fi
gs -q -dNOPAUSE -dBATCH -dSAFER \
-sDEVICE=pdfwrite \
-dCompatibilityLevel=1.3 \
-dPDFSETTINGS=/screen \
-dEmbedAllFonts=true \
-dSubsetFonts=true \
-dColorImageDownsampleType=/Bicubic \
-dColorImageResolution=$2 \
-dGrayImageDownsampleType=/Bicubic \
-dGrayImageResolution=$2 \
-dMonoImageDownsampleType=/Bicubic \
-dMonoImageResolution=$2 \
-sOutputFile="$NEWNAME" \
"$1"
echo $1: $((`wc -c "$1" | cut -d \ -f 1` / 1024 )) kb
echo $NEWNAME: $((`wc -c "$NEWNAME" | cut -d \ -f 1` / 1024 )) kb
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