[SDL] Writing directly on screen

[Carlo Capocasa]

Hi!

I'm looking for a cross-platform way to flash text on the screen. I
want to experiment with the effects flashed messages can have on the
user, much like the 'Eat Popcorn' movie subliminals of the 70s but
with self-chosen messages, e.g. 'I am an incredibly prolific hacker'.

Technically, this means overlaying text (and possibly graphics) over
the screen as a whole and removing it again, without interfering
with functionality at all.

Could SDL be used for this?

Carlo