MUI is able to uncompress byte&run compressed BODY chunks
automatically. If your data is compressed, you must
supply a value of cmpByteRun1 (==1) for this tag. Other
compression techniques are not supported.
Omitting this tag or setting it to 0 indicates that the
BODY data is uncompressed. Using the Bodychunk class
doesn't make much sense in this case since its main
purpose is to save memory for big images.