From 620793128b4c5c27fd39edeb5cd5da84bf948691 Mon Sep 17 00:00:00 2001
From: Abhay Rana <capt.n3m0@gmail.com>
Date: Sat, 21 Jun 2014 20:16:33 +0530
Subject: [PATCH] Adds shrinkpdf command to compress pdf files

---
 shrinkpdf | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100755 shrinkpdf

diff --git a/shrinkpdf b/shrinkpdf
new file mode 100755
index 0000000..2e07788
--- /dev/null
+++ b/shrinkpdf
@@ -0,0 +1,91 @@
+#!/bin/sh
+
+# http://www.alfredklomp.com/programming/shrinkpdf
+# Licensed under the 3-clause BSD license:
+#
+# Copyright (c) 2014, Alfred Klomp
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 1. Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+# 3. Neither the name of the copyright holder nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+
+shrink ()
+{
+	gs					\
+	  -q -dNOPAUSE -dBATCH -dSAFER		\
+	  -sDEVICE=pdfwrite			\
+	  -dCompatibilityLevel=1.3		\
+	  -dPDFSETTINGS=/screen			\
+	  -dEmbedAllFonts=true			\
+	  -dSubsetFonts=true			\
+	  -dColorImageDownsampleType=/Bicubic	\
+	  -dColorImageResolution=72		\
+	  -dGrayImageDownsampleType=/Bicubic	\
+	  -dGrayImageResolution=72		\
+	  -dMonoImageDownsampleType=/Bicubic	\
+	  -dMonoImageResolution=72		\
+	  -sOutputFile="$2"			\
+	  "$1"
+}
+
+check_smaller ()
+{
+	# If $1 and $2 are regular files, we can compare file sizes to
+	# see if we succeeded in shrinking. If not, we copy $1 over $2:
+	if [ ! -f "$1" -o ! -f "$2" ]; then
+		return 0;
+	fi
+	ISIZE="$(echo $(wc -c "$1") | cut -f1 -d\ )"
+	OSIZE="$(echo $(wc -c "$2") | cut -f1 -d\ )"
+	if [ "$ISIZE" -lt "$OSIZE" ]; then
+		echo "Input smaller than output, doing straight copy" >&2
+		cp "$1" "$2"
+	fi
+}
+
+usage ()
+{
+	echo "Reduces PDF filesize by lossy recompressing with Ghostscript."
+	echo "Not guaranteed to succeed, but usually works."
+	echo "  Usage: $1 infile [outfile]"
+}
+
+IFILE="$1"
+
+# Need an input file:
+if [ -z "$IFILE" ]; then
+	usage "$0"
+	exit 1
+fi
+
+# Output filename defaults to "-" (stdout) unless given:
+if [ ! -z "$2" ]; then
+	OFILE="$2"
+else
+	OFILE="-"
+fi
+
+shrink "$IFILE" "$OFILE" || exit $?
+
+check_smaller "$IFILE" "$OFILE"