[cairo] Re: 2 clipping questions
Behdad Esfahbod
behdad at behdad.org
Thu Apr 26 11:11:19 PDT 2007
On Thu, 2007-04-26 at 13:44 -0400, Carl Worth wrote:
>
> 1. Using the even-odd fill rule:
>
> cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
> cairo_rectangle (cr, 200, 200, 600, 600);
> cairo_rectangle (cr, 400, 400, 200, 200);
> cairo_clip (cr);
>
> 2. Using the winding fill rule (which is also the default):
>
> cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
> cairo_rectangle (cr, 200, 200, 600, 600);
> cairo_rectangle (cr, 400, 600, -200, 200);
> cairo_clip (cr);
The beauty of number 2 above is that it works with either fill rules.
--
behdad
http://behdad.org/
"Those who would give up Essential Liberty to purchase a little
Temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin, 1759
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