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@@ -1,3 +1,4 @@
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+# -*- coding: utf-8 -*-
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 require 'rubygems'
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 require 'digest/sha1'
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@@ -34,13 +35,16 @@ module Quilt
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     end
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     def write path
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-      # @image.write path
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       open(path, 'w') {|f| f.puts @image.to_blob }
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     end
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     def to_blob
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       @image.to_blob
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     end
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+
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+    def resize size
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+      @image.resize! size, size
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+    end
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   end
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   class ImageGD
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@@ -78,6 +82,13 @@ module Quilt
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     def to_blob
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       @image.pngStr
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     end
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+
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+    def resize size
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+      _image = GD::Image.new size, size
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+      # FIXME bug
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+      @image.copyResized _image, 0, 0, 0, 0, size, size, @image.width, @image.height
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+      @image = _image
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+    end
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   end
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   class Identicon
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@@ -115,13 +126,24 @@ module Quilt
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         @code = Identicon.calc_code str.to_s
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       end
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       @decode = decode @code
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-      @scale = opt[:scale] || 1
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+
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+      if opt[:size]
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+        @scale = (((opt[:size] / 3) - 1) / (PATCH_SIZE - 1)) + 1
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+        @resize_to = opt[:size]
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+      else
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+        @scale = opt[:scale] || 1
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+      end
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+
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       @patch_width = (PATCH_SIZE - 1) * @scale + 1
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       @image = @@image_lib.new @patch_width * 3, @patch_width * 3
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       @back_color = @image.color 255, 255, 255
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       @fore_color = @image.color @decode[:red], @decode[:green], @decode[:blue]
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       @image.transparent @back_color
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       render
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+
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+      if @resize_to
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+        @image.resize @resize_to
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+      end
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     end
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     def decode code

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@@ -70,4 +70,19 @@ class QultTest < Test::Unit::TestCase
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       assert_equal salt, Quilt::Identicon.salt
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     end
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   end
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+
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+  def test_size_opt_im
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+    size = 100
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+    Quilt::Identicon.image_lib = Quilt::ImageRmagick
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+    identicon = Quilt::Identicon.new 'foo', :size => size
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+    assert_equal size, identicon.instance_variable_get(:@image).instance_variable_get(:@image).rows
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+    assert_equal size, identicon.instance_variable_get(:@image).instance_variable_get(:@image).columns
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+  end
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+
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+  def test_size_opt_gd
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+    Quilt::Identicon.image_lib = Quilt::ImageGD
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+    identicon = Quilt::Identicon.new 'foo', :size => size
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+    assert_equal size, identicon.instance_variable_get(:@image).instance_variable_get(:@image).width
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+    assert_equal size, identicon.instance_variable_get(:@image).instance_variable_get(:@image).height
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+  end
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 end