preparing filters to be threadable

[Michael Thaler]

On Friday 09 March 2007 14:49, Schleimer, Ben wrote:

> I just finished working on improving KisPreviewWidget (in krita 1.6) so it
> could display the bumpmap filter again. I changed the implementation so all
> filtering for the preview is done inside KisPreviewWidget and instead of
> prescaling the source paint device, I postscale the generated QImage. If
> the supportsThreading is true, then KisPreviewWidget optimizes by rendering
> 128x128

If I understand this correctly, that means the preview does the same amount of 
calculations as the actual filtering of the image? I don't think that this is 
a good idea because the preview for complex filters (like cubism) will become 
very slow.

Greetings,
Michael