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#!/usr/bin/env bash
####
# FILE NAME pdf2images.sh
#
# Authors:
# Gustav Hartvigsson 2024
# Distributed under the Cool Licence 1.1
#
# Changes:
#
# 2024-07-10
# * Initial version
# *
####
__FILE=""
__FIRST_PAGE=0
__LAST_PAGE=0
__SCALE=250
__SANITY=true
__HAS_OPTIPNG=false
__SCRIPT_ROOT=$(dirname $(readlink -f $0))
source $__SCRIPT_ROOT/useful.inc.sh
function __usage () {
echo "pdf2images.sh --- Convert a range of pdf pages into pngs."
echo "USAGE:"
echo " pdf2images.sh <file>.pdf <first page> <last page>"
echo ""
}
function __sanity_check () {
# Check that we have the tools needed.
__find_tool pdftoppm
__silent which optipng
if [ $? -gt 0 ]; then
echo " Can't find tool \"optpng\" (Not required)."
__HAS_OPTIPNG=false
fi
if [[ $__SANITY == false ]]; then
echo ""
echo "Please install the missing tools."
echo ""
exit 1
fi
}
function __process () {
pdftoppm -f $__FIRST\
-l $__LAST\
-r $__SCALE\
-gray\
-png\
-progress\
$__FILE\
${__FILE%%.*}
if [[ $__HAS_OPTIPNG == true ]]; then
optipng ${__FILE%%.*}*.png
fi
}
function __parse_args () {
if [ $# -eq 0 ]; then
__usage
exit 1
fi
__FILE=$1
shift
__FIRST=$1
shift
__LAST=$1
shift
if [ $# -ne 0 ]; then
echo "Nummber of arguments missmatch."
echo ""
__usage
exit 1
fi
}
function __main () {
__sanity_check
__parse_args "${@}"
__process
exit 0
}
__main "${@}"
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