Krita's rendering model

[Boudewijn Rempt]

On Thursday 15 September 2005 15:04, Boudewijn Rempt wrote:
> On Thursday 15 September 2005 14:59, Casper Boemann wrote:
> > So either we use the projection for something useful or we just remove it
> > to save memory.
>
> If we keep it, then I have an easier time with the optimized paintContent
> scheme 2 I outlined in my original mail. I would move composition to the
> notify method, and paintContent would just use the right bit of the
> projection. That has an important advantage: compositing no longer has to
> be done in X11 optimized render chunks, so we can have longer runs of
> pixels to feed to KisPainter.

I haven't succeeded yet in making the composition dependent upon notify
and the rendertopainter use the projection, but removing the 
renderheight/renderwidth loop means a 25% speed increase in itself:

With loop:

    painted a 512 x 512 image 100 times: 4397 ms
    painted a 512 x 512 image with 3 layers 100 times: 4841 ms


Without loop:

    painted a 512 x 512 image 100 times: 3298 ms
    painted a 512 x 512 image with 3 layers 100 times: 3672 ms

Which is nice to have :-)

-- 
Boudewijn Rempt 
http://www.valdyas.org/fading/index.cgi
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