uncrush.sh

#
# Takes a PNG that has been optimised by Xcode for display on iOS devices, and
# creates a new, unoptimised file that can be opened in Preview. If you don't
# supply a second argument, the output file will be named in-uncrushed.png
#
# See: http://developer.apple.com/iphone/library/qa/qa2010/qa1681.html
#
function uncrush() {
  local infile="$1"; local outfile="$2"

  if [[ -z $infile ]]; then
    echo -e "Usage:\n\tuncrush in.png\n\tuncrush in.png out.png"
  fi

  if [[ -z $outfile ]]; then
    local outprefix=${infile%\.*}
    outfile="$outprefix-uncrushed.png"
  fi

  /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush -revert-iphone-optimizations -q $infile $outfile
}