[cairo] Not updating screen

[Jose Hevia]

Hi,
I'm drawing a map with cairo (200 polygons), I use cairo_line_to and
cairo_fill and/or cairo_stroke. It works.

The problem, it's very slow because cairo updates the screen every
time I use cairo_fill and cairo_stroke (that's 200 times!!!).

So, how could I make cairo wait until I want him to refresh the
screen. I think this has to be very easy, but I didn't found any info
(maybe I don't know what to search).

Bye                        Jose Hevia