[cairo] Problem clearing edge of a clip region
Ian Britten
britten at caris.com
Tue Sep 29 06:32:35 PDT 2009
[ bump ]
Any comments? Sorry to re-ask - I know everyone is busy... :P
Thanks,
Ian
> Hi all,
> [ cairo v1.8.8, pixman 0.14.0 ]
> I'm having a problem when trying to clear the contents of a
> clip region - Specifically the border pixels - and was wondering
> if anyone can offer any insight?
>
> In the attached sample, I define a clip region, draw to it, then
> clear it. However, after doing the clear, the edge pixels are
> still (partially) visible, and seemingly weren't cleared.
>
> Am I doing something wrong? Might this be a bug? Or is this
> somehow due to subpixel/AA rendering?
> If it's a problem with my technique/understanding, can anyone
> offer any suggestions about how to proceed? Or point me to
> something to read? My code is based on
> http://cairographics.org/FAQ/#clear_a_surface, but that doesn't
> discuss this particular case.
>
> Many thanks for any info!
> Ian
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