[cairo] how to enable font aliasing

[Lawrence D'Oliveiro]

I wrote:

> You’re not calling cairo_set_antialias, are you? What does
> cairo_get_antialias
> <http://cairographics.org/manual/cairo-cairo-t.html#cairo-get-antialias>
> return?

By the way, this setting applies to paths, not text. For text, you
control anti-aliasing via the font_options.