Krita's rendering model

Boudewijn Rempt boud at
Thu Sep 15 16:51:24 CEST 2005

On Thursday 15 September 2005 16:48, Adrian Page wrote:
> Boudewijn Rempt wrote:
> > On Thursday 15 September 2005 14:45, Boudewijn Rempt wrote:
> >>On Thursday 15 September 2005 14:41, Boudewijn Rempt wrote:
> >>>Good idea! A sort of expiring cache for rects with the exposure
> >>> parameter added, that should work very well.
> >>
> >>Oh, and what I forgot about: we already have something very close to a
> >> full cache of the image, namely the projection layer. But I remember I
> >> was thinking that we could, maybe, do without that being around at all
> >> times.
> >
> > And every view has something that looks suspiciously like a fully
> > rendered cache of the image, too: m_canvasPixmap. But I may be mistaken
> > here -- who knows?
> The m_canvasPixmap just caches the canvas widget contents so that it
> doesn't have to do any re-rendering when parts of the canvas are hidden
> then exposed.

Okay, so that's not so bad. I'm nearly done with improving the projection 
handling: the only problem I still have is on initial loading of images.

Boudewijn Rempt
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