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List:       koffice-devel
Subject:    Re: Problems with the conversion formulas of RGB to CMYK and back.
From:       Tim Beaulen <tbscope () gmail ! com>
Date:       2005-12-22 11:23:31
Message-ID: dd1e9b170512220323g3e1bae70j980a785364a437aa () mail ! gmail ! com
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Ok, thanks.

Then I'll remove that cmyk widget.

On 12/22/05, Boudewijn Rempt <boud@valdyas.org> wrote:
> On Thu, 22 Dec 2005, Tim Beaulen wrote:
>
> > It would be great if someone could take a look at
> > /lib/kopainter/ko_cmyk_widget.*
> > I looked at it for two days and whatever I did, the only conclusion I
> > could make was that the formulas are wrong. And conversion / rounding
> > errors (between float and int).
>
> Basically, you shouldn't use formula's here. Especially in krita, where
> we have cmyk paint devices, going through QColor will introduce many
> problems. In 2.0, we should use Krita's cmm in Krita, Karbon and KWord
> (at least) -- and then we can use lcms for the conversions when and where
> needed.
>
> I tried to use the formula's too, when I started on Krita, but it didn't
> suffice.
>
> Boudewijn
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