blend function urgently needed in kdelibs

Robert Knight robertknight at
Mon May 21 20:48:11 BST 2007

> Can someone PLEASE suggest where I can put such a thing?

kdeui/colors strikes me as the most obvious place by name.


On 21/05/07, Matthew Woehlke <mw_triad at> wrote:
> kdelibs desperately needs a color blending function. I am volunteering
> (yet again) to provide one that looks like this:
> KColor blend(const KColor& c1, const KColor& c2,
>               double k = 0.5, double r = 0.5, SPEC cs = CS_RGB,
>               int flags = BLEND_NORMAL, int cmask = 0x0000FFFF);
> Can someone PLEASE suggest where I can put such a thing? (Due to lack of
> prior response, if I don't hear back by next Monday I'm going to /pick/
> somewhere and people can bitch about it.)
> The default arguments will result in k% c1 plus (1-k)% c2 (i.e. "normal"
> blending) ...but it is extensible and BC to nearly anything.
> No, KColor is not a typo; I want HSV and HSY support (I'll subclass
> QColor if possible, otherwise will make conversion as painless as I
> can.) Actually KColor::blend would be convenient anyway, so that would
> make the question 'where to put KColor'.
> --
> Matthew
> When in doubt, duct tape!

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