AW: [Qgis-developer] "Fix problems with incorectly filled polygons"issues

Maciej Sieczka tutey at
Mon Apr 14 01:56:05 EDT 2008

Hugentobler Marco pisze:
> I think the thing that brings your performance down is transparency.
> Editing markers and measuring rubber bands both use transparency (and
> GRASS edits don't).

> FPWIPF uses QPixmap to render (and is rendered on
> the X-server). If FPWIPF is disabled, QImage is used which afaik is
> pure software rendering.

So should it be faster or slower with with FPWIPF enabled?

Currently, with FPWIPF *enabled*, during digitizing rendering is 66 
times worse, whereas outside digitising it is 2-3 times better. This 
seems inconsistent.

I have the same behaviour on two machines - x86 Debian testing with ATI 
X700 PCIE, using the open source radeon driver, and amd64 Ubuntu Gutsy 
with GeForce 6200 LE PCIE, using proprietary nvidia driver. Hardware 
acceleration and direct rendering work OK on both machines.


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