A new lesson done. Yay! I should have called this one the Extensions and Scissor Testing lesson, because I left the TGA stuff out and the token thingy was replaced with a call to split. But I wanted to keep to the pattern with the lesson titles.
I changed the code to initialize the texts only once and not every draw-call. Better that way. Otherwise there isn't that much new stuff. Then glScissor call is pretty simple.
See the code here.