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Boudewijn Rempt wrote:
> Instead of simply reusing what was already on the canvasPixmap.
> 
> What I propose to try is -- but it's not the kind of thing I'm good at:

I can look at this if you'd prefer, as I've done quite a lot on the 
rendering/paint-event code lately.

> * paint only once on loading
> * when (really) resizing, reuse already rendered parts of the canvasPixmap, 
> just like   when scrolling.
> * colorcorrect after downscaling if zoom < 1.0

Adrian