No, you should build a function like this:

bmap_for_str(bmap* font, string* string);
return: bmap*

Note: your font isnt declared as font*, but as a bitmap now!!! That is very important.

So you can easily let your script render a bitmap with your string build up on these bitmap chunks and then you can assign this bmap to a panel. Works pretty fast when I coded it that time and with those new bitmap features (bmap_blit) and so its much faster now.