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-rwxr-xr-xcli/pdf-compress.sh56
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diff --git a/cli/pdf-compress.sh b/cli/pdf-compress.sh
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+#!/bin/sh
+#
+# Shrink the size of PDF files by adjust its quality using `gs` (GhostScript).
+#
+# Aaron LI
+# 2013/09/18
+#
+
+case "$1" in
+ -[hH]*|--[hH]*)
+ printf "usage:\n"
+ printf " `basename $0` in=<input.pdf> out=<output.pdf> quality=<screen|ebook|printer|prepress> imgdpi=<img_dpi>\n"
+ exit 1
+ ;;
+esac
+
+getopt_keyval() {
+ until [ -z "$1" ]
+ do
+ key=${1%%=*} # extract key
+ val=${1#*=} # extract value
+ keyval="${key}=\"${val}\""
+ echo "## getopt: eval '${keyval}'"
+ eval ${keyval}
+ shift # shift, process next one
+ done
+}
+getopt_keyval "$@"
+
+if [ -z "${in}" ] || [ -z "${out}" ]; then
+ printf "Error: 'in' or 'out' not specified\n"
+ exit 2
+fi
+quality=${quality:-ebook}
+imgdpi=${imgdpi:-120}
+
+printf "# in: ${in}
+# out: ${out}
+# quality: ${quality}
+# imgdpi: ${imgdpi}\n"
+
+gs -dNOPAUSE -dBATCH -dSAFER \
+ -sDEVICE=pdfwrite \
+ -dCompatibilityLevel=1.4 \
+ -dPDFSETTINGS="/${quality}" \
+ -dEmbedAllFonts=true \
+ -dSubsetFonts=true \
+ -dColorImageDownsampleType=/Bicubic \
+ -dColorImageResolution=${imgdpi} \
+ -dGrayImageDownsampleType=/Bicubic \
+ -dGrayImageResolution=${imgdpi} \
+ -dMonoImageDownsampleType=/Bicubic \
+ -dMonoImageResolution=${imgdpi} \
+ -sOutputFile=${out} \
+ ${in}
+