image.rb in chunky_png-1.3.12

- old
+ new

@@ -1,39 +1,37 @@
 module ChunkyPNG
-
   # ChunkyPNG::Image is an extension of the {ChunkyPNG::Canvas} class, that
   # also includes support for metadata.
   #
   # @see ChunkyPNG::Canvas
   class Image < Canvas
-
     # The minimum size of bytes the value of a metadata field should be before compression
     # is enabled for the chunk.
     METADATA_COMPRESSION_TRESHOLD = 300
-    
+
     # @return [Hash] The hash of metadata fields for this PNG image.
     attr_accessor :metadata
-    
+
     # Initializes a new ChunkyPNG::Image instance.
     # @param [Integer] width The width of the new image.
     # @param [Integer] height The height of the new image.
     # @param [Integer] bg_color The background color of the new image.
     # @param [Hash] metadata A hash of metadata fields and values for this image.
     # @see ChunkyPNG::Canvas#initialize
     def initialize(width, height, bg_color = ChunkyPNG::Color::TRANSPARENT, metadata = {})
       super(width, height, bg_color)
       @metadata = metadata
     end
-    
+
     # Initializes a copy of another ChunkyPNG::Image instance.
     #
     # @param [ChunkyPNG::Image] other The other image to copy.
     def initialize_copy(other)
       super(other)
       @metadata = other.metadata
     end
-    
+
     # Returns the metadata for this image as PNG chunks.
     #
     # Chunks will either be of the {ChunkyPNG::Chunk::Text} type for small
     # values (in bytes), or of the {ChunkyPNG::Chunk::CompressedText} type
     # for values that are larger in size.
@@ -47,11 +45,11 @@
         else
           ChunkyPNG::Chunk::Text.new(key, value)
         end
       end
     end
-    
+
     # Encodes the image to a PNG datastream for saving to disk or writing to an IO stream.
     #
     # Besides encoding the canvas, it will also encode the metadata fields to text chunks.
     #
     # @param [Hash] constraints The constraints to use when encoding the canvas.
@@ -59,21 +57,21 @@
     # @see ChunkyPNG::Canvas::PNGEncoding#to_datastream
     # @see #metadata_chunks
     def to_datastream(constraints = {})
       ds = super(constraints)
       ds.other_chunks += metadata_chunks
-      return ds
+      ds
     end
-    
+
     # Reads a ChunkyPNG::Image instance from a data stream.
     #
     # Besides decoding the canvas, this will also read the metadata fields
     # from the datastream.
     #
-    # @param [ChunkyPNG::Datastream] The datastream to read from.
+    # @param [ChunkyPNG::Datastream] ds The datastream to read from.
     def self.from_datastream(ds)
       image = super(ds)
       image.metadata = ds.metadata
-      return image
+      image
     end
   end
 end