Implement missing Enumerable for Buffer.

lib/enumerable/vivid/buffer.ex

@@ -0,0 +1,23 @@
+defimpl Enumerable, for: Vivid.Buffer do
+  alias Vivid.Buffer
+
+  @moduledoc """
+  Implements the Enumerable protocol for Buffer.
+  """
+
+  @doc """
+  Returns the number of pixels in a buffer.
+  """
+  def count(%Buffer{buffer: buffer}), do: {:ok, Enum.count(buffer) }
+
+  @doc """
+  Returns whether a colour is a member of a buffer.
+  This is mostly useless, but it's part of the Enumerable protocol.
+  """
+  def member?(%Buffer{buffer: buffer}, colour), do: {:ok, Enum.member?(buffer, colour) }
+
+  @doc """
+  Reduce the buffer into an accumulator.
+  """
+  def reduce(%Buffer{buffer: buffer}, acc, fun), do: Enumerable.List.reduce(buffer, acc, fun)
+end

mix.exs

@@ -3,7 +3,7 @@ defmodule Vivid.Mixfile do
 
   def project do
     [app: :vivid,
-     version: "0.1.0",
+     version: "0.1.1",
      description: description,
      elixir: "~> 1.3",
      build_embedded: Mix.env == :prod,