[cairo] Not updating screen

[Kalle Vahlman]

2007/8/28, Jose Hevia <jose.francisco.hevia at gmail.com>:
> 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).

If your windowing system / whatever doesn't provide double-buffering,
cairo has the notion of "groups" that you can use for that.

See

  http://cairographics.org/manual/cairo-cairo-t.html#cairo-push-group

for more information.

-- 
Kalle Vahlman, zuh at iki.fi
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