lib/chunky_png/datastream.rb in chunky_png-0.10.3 vs lib/chunky_png/datastream.rb in chunky_png-0.10.4

@@ -144,9 +144,15 @@
 
     ##################################################################################
     # WRITING DATASTREAMS
     ##################################################################################
 
+    # Returns an empty stream using binary encoding that can be used as stream to encode to.
+    # @eturn [String] An empty, binary string.
+    def self.empty_bytearray
+      ChunkyPNG::EMPTY_BYTEARRAY.dup
+    end
+
     # Writes the datastream to the given output stream.
     # @param [IO] io The output stream to write to.
     def write(io)
       io << SIGNATURE
       each_chunk { |c| c.write(io) }