we are using the OpenTK for our scientific work here in our bioinformatics department of the univeristy of applied sciences in Emden. First of all: THANKS for programming OpenTK. It is perfectly usable and STABLE for our efforts in scientific image annotations and visualization of data.
What we use for displaying text on images is the TextPrinter (which seems to be "outdated"). We tried some alternatives, but the "good old" textprinter is a work-horse which just does what we need to do perfectly.
Could you provide us with the source code of the "old, outdated" TextPrinter class so that we could maintain it, if needed?
Good luck and happy programming !
Prof. Dr. Gerhard Kauer