Initial catchat commit.

pixel.rb

@@ -0,0 +1,61 @@
+class Pixel
+  @mp = nil
+
+  @r = 0
+  @g = 0
+  @b = 0
+
+  def initialize(mp)
+    @mp = mp
+
+    @r = @mp.red
+    @g = @mp.green
+    @b = @mp.blue
+  end
+
+  def randomize
+    @r = ((@r >> 2) << 2) | rand(4)
+    @g = ((@g >> 2) << 2) | rand(4)
+    @b = ((@b >> 2) << 2) | rand(4)
+  end
+
+  def getMagickPixel
+    @mp.red   = @r
+    @mp.green = @g
+    @mp.blue  = @b
+    return @mp
+  end
+
+  def getPixelBits()
+    bits = 0
+
+    bits = (bits << 8) | @r
+    bits = (bits << 8) | @g
+    bits = (bits << 8) | @b
+
+    return bits
+  end
+
+  def encodeBits(bits)
+    @r = ((@r >> 2) << 2) | (bits & 3)
+    bits = bits >> 2
+
+    @g = ((@g >> 2) << 2) | (bits & 3)
+    bits = bits >> 2
+
+    @b = ((@b >> 2) << 2) | (bits & 3)
+    bits = bits >> 2
+
+    return bits
+  end
+
+  def decodeBits
+    bits = 0
+
+    bits = (bits << 2) | (@b & 3)
+    bits = (bits << 2) | (@g & 3)
+    bits = (bits << 2) | (@r & 3)
+
+    return bits
+  end
+end