Animation paintop, bad performance

Dmitry Kazakov dimula73 at
Wed Oct 20 16:17:15 CEST 2010

> Any ideas to have less flickering?
> I suppose that two setDirty calls are responsible for this?
> I first bitBlt the old values and then bitBlt the actual status of the dab
> to
> the canvas (see code for reference, now even with comments!)
> Maybe the bitBlt area is quite large and cause flickering, slow canvas
> updates?
> Dmitry?

Yes, you may try to use the only setDirty() for a resulting rect.

Dmitry Kazakov
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