Currently I try to distinguish between PCL and Text data, does someone know how to distinguish them properly? I have read that there are several PCL standards (PCL1 - PCL6), would this affect the detection?
How to distinguish between PCL data and usual Text?
You want more security?
You could write a class(or find one) special for decoding the PCL code and convert it to an image or something. If it fails, it is text.