# 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