new (PDF::Reader::Filter)

    # File lib/pdf/reader/filter.rb, line 42
        def initialize (name, options = nil)
          @options = options

          case name.to_sym
          when :ASCII85Decode  then @filter = :ascii85
          when :ASCIIHexDecode then @filter = :asciihex
          when :CCITTFaxDecode then @filter = nil
          when :DCTDecode      then @filter = nil
          when :FlateDecode    then @filter = :flate
          when :JBIG2Decode    then @filter = nil
          else                 raise UnsupportedFeatureError, "Unknown filter: #{name}"
          end
        end