-- And the PW2 REAGL trickery (they're always full refreshes, but there's no black flash)
-- And the PW2 REAGL trickery (they're always full refreshes, but there's no black flash)
-- FIXME: Possibly a bad idea if self.update_regions_func is set and we actually really want a partial update?
-- FIXME: Possibly a bad idea if self.update_regions_func is set and we actually really want a partial update? Fallback to default_waveform_mode (or GC16_FAST on Kindle)