No, really, just added the whole thing. This took literally the
entire day. I'm soooo glad it's working now!
Also includes tons of other small fixes I didn't bother to keep
track of.
The fix is simpl to make blitTextInPlace center text to the
screen rather than the text creation doing it. That way you don't
get weird behavior with screen_blitText (which already handles centering).
Problem 1: fullscreen switching was leaving artifacts. Fixed by
drawing all black when switching fullscreen (and switching fullscreen
is now handled by its own function).
Problem 2: the mission briefing screen would distort if you changed
fullscreen during it. Fixed by redrawing the screen (it was previously
only drawn once).