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+
+The GIMP Pattern File Format Version 1 (.pat)
+------------------------------------------------
+
+HEADER
+------
+
+Bytes 0  - 3:  header_size: 
+	Type: 32 bit unsigned int
+	Value: size of pattern header (24) + length of pattern name
+
+Bytes 4  - 7: version
+	Type: 32 bit unsigned int 
+	Value: The file format version.
+
+Bytes 8  - 11: width
+	Type: 32 bit unsigned int 
+	Value: Pattern width
+
+Bytes 12 - 15: height
+	Type: 32 bit unsigned int 
+	Value: Pattern height
+
+Bytes 16 - 19: bytes
+	Type: 32 bit unsigned int 
+	Value: Colour depth of pattern 
+	1 = greyscale, 2 = greyscale + A, 3 = RGB, 4 = RGBA
+
+Bytes 20 - 23: magic_number
+	Type: 32 bit unsigned int 
+	Value: GIMP pattern magic number.
+	('G' << 24) + ('P' << 16) + ('A' << 8) + 'T'
+
+Bytes 24 - (header_size - 1):
+	Type: char *
+	Value: UTF-8 string - name of pattern
+
+
+BODY
+----
+	Size: width * height * bytes
+	Type: uchar *
+	Value: Pixel values (row-first) for pattern
+