shrinkpdf: tracking

1 files changed, 101 insertions, 0 deletions

diff --git a/.local/bin/shrinkpdf b/.local/bin/shrinkpdf
new file mode 100755
index 0000000..b9d1f19
--- /dev/null
+++ b/.local/bin/shrinkpdf
@@ -0,0 +1,101 @@
+#!/bin/sh
+
+# http://www.alfredklomp.com/programming/shrinkpdf
+# Licensed under the 3-clause BSD license:
+#
+# Copyright (c) 2014-2019, 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.
+
+#
+# Modified by Vivek Gite to suit my needs
+#
+shrink ()
+{
+        gs                                      \
+          -q -dNOPAUSE -dBATCH -dSAFER          \
+          -sDEVICE=pdfwrite                     \
+          -dCompatibilityLevel=1.3              \
+          -dPDFSETTINGS=/screen                 \
+          -dEmbedAllFonts=true                  \
+          -dSubsetFonts=true                    \
+          -dAutoRotatePages=/None               \
+          -dColorImageDownsampleType=/Bicubic   \
+          -dColorImageResolution=$3             \
+          -dGrayImageDownsampleType=/Bicubic    \
+          -dGrayImageResolution=$3              \
+          -dMonoImageDownsampleType=/Subsample  \
+          -dMonoImageResolution=$3              \
+          -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] [resolution_in_dpi]"
+}
+
+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
+
+# Output resolution defaults to 72 unless given:
+if [ ! -z "$3" ]; then
+        res="$3"
+else
+        res="90"
+fi
+
+shrink "$IFILE" "$OFILE" "$res" || exit $?
+
+check_smaller "$IFILE" "$OFILE"