95 lines
2.0 KiB
Bash
Executable File
95 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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## Some JPEG options
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# -sDEVICE=jpeg
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# -dUseCIEColor
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# -dJPEGQ=100
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# -r300
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# -dTextAlphaBits=4
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# -dGraphicsAlphaBits=4
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# -dMaxStripSize=8192
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_usage () {
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cat <<EOF
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Usage: ${1##*/} [OPTIONS] PDFFILES
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All PDF files will be compressed to a PDF file with "-compressed" appended in its name.
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Options:
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-c: Compress raster graphics at the expense of a quality loss.
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-f: Overwrite existing files.
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-h: Show this help.
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-i: In-place compression.
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-n: Do not compress raster graphics at all. Output size is usually greater.
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For more details:
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$ gs -sDEVICE=pdfwrite -o /dev/null \\
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-c "currentpagedevice { exch ==only ( ) print == } forall"
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http://partners.adobe.com/public/developer/en/acrobat/sdk/pdf/pdf_creation_apis_and_specs/DistillerParameters.pdf
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EOF
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}
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OPT_INPLACE=false
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OPT_OVERWRITE=false
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OPT_COMPRESSION="-dColorConversionStrategy=/LeaveColorUnchanged -dDownsampleMonoImages=false -dDownsampleGrayImages=false -dDownsampleColorImages=false -dAutoFilterColorImages=false -dAutoFilterGrayImages=false -dColorImageFilter=/FlateEncode -dGrayImageFilter=/FlateEncode"
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while getopts ":cfhin" opt; do
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case $opt in
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c)
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OPT_COMPRESSION="" ;;
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f)
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OPT_OVERWRITE=true ;;
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h)
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_usage "$0"
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exit 1 ;;
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i)
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OPT_INPLACE=true ;;
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n)
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OPT_COMPRESSION="-dColorConversionStrategy=/LeaveColorUnchanged -dEncodeColorImages=false -dEncodeGrayImages=false -dEncodeMonoImages=false" ;;
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\?)
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_usage "$0"
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exit 1 ;;
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esac
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done
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shift $(($OPTIND - 1))
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if [ $# -eq 0 ]; then
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_usage "$0"
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exit 1
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fi
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for i ; do
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if [ ! -f "$i" ]; then
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echo "$i is not a valid file."
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continue
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fi
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case "$i" in
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*/*) ;;
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*) i="./$i" ;;
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esac
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DIRNAME="${i%/*}"
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BASENAME="${i##*/}"
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EXTNAME="${BASENAME##*.}"
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BASENAME="${BASENAME%.*}"
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OUTPUT="$DIRNAME/$BASENAME-compressed.pdf"
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if [ -e "$OUTPUT" ] && ! $OPT_OVERWRITE; then
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echo "$OUTPUT alredy present. Skipping."
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continue
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fi
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echo "$i"
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gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite $OPT_COMPRESSION -sOutputFile="$OUTPUT" "$i"
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if $OPT_INPLACE; then
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rm -f "$i"
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mv "$OUTPUT" "$i"
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fi
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done
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