[cairo] cairo_clip and dirty_area
cworth at cworth.org
Wed Sep 24 12:51:51 PDT 2008
On Sat, 2008-09-20 at 11:30 +0800, duan tao wrote:
> I use cairo to render my flash_player, and i konw the Dirty_Area
> between the current frame and
> the next frame, so should I use cairo_clip to render the Dirty_Area
> only? It does beeter or worse to
> the performance?
Using cairo_clip is better *if* you are using integer rectangles for the
path, (and with an identity transformation matrix).
It can make performance worse if you are doing some non-pixel aligned
clipping path, (whether by using curves, or with a non-integer scale, or
See here for more details:
And have fun with cairo!
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