pdf-compress.sh

for f in "$@"
do
	TMP=$(mktemp)
	SIZE_OLD=$(wc -c < "$f")

	echo "Optimizing '$f' of size $SIZE_OLD"

	/usr/local/bin/gs \
	-dNOPAUSE -dBATCH -dSAFER \
	-sDEVICE=pdfwrite \
	-dCompatibilityLevel=1.4 \
	-dPDFSETTINGS=/screen \
	-dDetectDuplicateImages=true \
	-dDownsampleColorImages=true \
	-dDownsampleGrayImages=true \
	-dDownsampleMonoImages=true \
	-dColorImageDownsampleType=/Bicubic	\
	-dGrayImageDownsampleType=/Bicubic	\
	-dMonoImageDownsampleType=/Bicubic	\
	-dColorImageResolution=144		\
	-dGrayImageResolution=144		\
	-dMonoImageResolution=144		\
	-dEmbedAllFonts=false \
	-dSubsetFonts=true \
	-dConvertCMYKImagesToRGB=true \
	-dCompressFonts=true \
	-sOutputFile="$TMP" \
	"$f"

	SIZE_NEW=$(wc -c < "$TMP")

	if [ $(echo "$SIZE_NEW > $SIZE_OLD" | bc) = "1" ]; then
		echo "New size ($SIZE_NEW) is bigger, skipping"
		rm "$TMP"
	else
		echo "New size: $SIZE_NEW"
		mv "$TMP" "${f}-screen-144.pdf"
	fi

done