refactored encodings to directories.

common/encoding.go

@@ -0,0 +1,28 @@
+package common
+
+import (
+	"io"
+)
+
+// An Encoding implements a method for encoding pixel data that is
+// sent by the server to the client.
+type Encoding interface {
+	// The number that uniquely identifies this encoding type.
+	Type() int32
+
+	// Read reads the contents of the encoded pixel data from the reader.
+	// This should return a new Encoding implementation that contains
+	// the proper data.
+	Read(*PixelFormat, *Rectangle, io.Reader) (Encoding, error)
+}
+
+const (
+	EncodingRaw      = 0
+	EncodingCopyRect = 1
+	EncodingRRE      = 2
+	EncodingCoRRE    = 4
+	EncodingHextile  = 5
+	EncodingZlib     = 6
+	EncodingTight    = 7
+	EncodingZRLE     = 16
+)