lib/chunky_png/palette.rb in chunky_png-1.3.11 vs lib/chunky_png/palette.rb in chunky_png-1.3.12

@@ -38,16 +38,12 @@
       return nil if palette_chunk.nil?
 
       decoding_map = []
       index = 0
 
-      palatte_bytes = palette_chunk.content.unpack('C*')
-      if transparency_chunk
-        alpha_channel = transparency_chunk.content.unpack('C*')
-      else
-        alpha_channel = []
-      end
+      palatte_bytes = palette_chunk.content.unpack("C*")
+      alpha_channel = transparency_chunk ? transparency_chunk.content.unpack("C*") : []
 
       index = 0
       palatte_bytes.each_slice(3) do |bytes|
         bytes << alpha_channel.fetch(index, ChunkyPNG::Color::MAX)
         decoding_map << ChunkyPNG::Color.rgba(*bytes)
@@ -163,11 +159,11 @@
     # Note that this chunk can be left out of every color in the palette is
     # opaque, and the image is encoded using indexed colors.
     #
     # @return [ChunkyPNG::Chunk::Transparency] The tRNS chunk.
     def to_trns_chunk
-      ChunkyPNG::Chunk::Transparency.new('tRNS', map { |c| ChunkyPNG::Color.a(c) }.pack('C*'))
+      ChunkyPNG::Chunk::Transparency.new("tRNS", map { |c| ChunkyPNG::Color.a(c) }.pack("C*"))
     end
 
     # Creates a PLTE chunk that corresponds with this palette to store the r,
     # g, and b channels of all colors.
     #
@@ -184,11 +180,11 @@
       each_with_index do |color, index|
         @encoding_map[color] = index
         colors += ChunkyPNG::Color.to_truecolor_bytes(color)
       end
 
-      ChunkyPNG::Chunk::Palette.new('PLTE', colors.pack('C*'))
+      ChunkyPNG::Chunk::Palette.new("PLTE", colors.pack("C*"))
     end
 
     # Determines the most suitable colormode for this palette.
     # @return [Integer] The colormode which would create the smallest possible
     #  file for images that use this exact palette.
@@ -217,10 +213,9 @@
       case size
       when 1..2 then 1
       when 3..4 then 2
       when 5..16 then 4
       when 17..256 then 8
-      else nil
       end
     end
   end
 end