I am trying to build an iOS app that uses my thermal printer. I am using react-native, and the react-native sdk that is supplied for the printer. I have a star TSP100IIIBi printer. It only accepts raster images as print commands. I would like to be able to print arbitrary strings of text to the printer, but to do so I need them to be encoded into an image.

For example, I would like to printer a some string key value pairs:

price: $43.23
user id: 4350

I would need to draw an image with these strings.

Is there way I can accomplish this?