pdf-to-png.sh

#!/bin/bash
# (c) 2014 Thomas Kaiser

Sizes="512 1024 2048 4096"
export PATH=/bin:/usr/bin:/usr/local/bin

Main() {
    TargetDir=$(mktemp -d /Users/Shared/pdf-to-png.XXXXXX)
    while [ $# -gt 0 ]; do
        for i in ${Sizes} ; do
            qlmanage -t -s ${i}x${i} -o "${TargetDir}/" "$1"
            mv "${TargetDir}/${1##*/}.png" "${TargetDir}/${1##*/}-${i}.png"
        done
        shift
    done
} # Main

Main "$@"