Mipmapping concept problem

[Dmitry Kazakov]

Hi, All!

I was thinking over advantages/disadvantages of switching to KisImagePyramid
projection backend and i'm in a trouble now:

We wanted to switch to it for eliminating creation of a big QImage for
caching the projection. But how will we paint KisPaintDevice onto
KisPrescaledProjection's internal QImage? Current implementation creates
temporary QImage and paints it onto prescaled projection with
QPainter::draw. The problem is, when we zoom in/out we will create the same
fullsized QImage. That is, of course, not good. And i don't know how to
solve this. Split the patch image into smaller ones? Or there is some other
idea?


-- 
Dmitry Kazakov
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