[cairo] Spot colors (and CMYK)

Francois Robert frobert at atex.com
Thu Feb 18 08:47:19 PST 2010

Kai-Uwe Behrmann wrote :
> Cmyk and alpha is not my speciality. But I am shure this matter could 
> be further thought out. However it is not the core of Cmyk, spot
> or CM support in cairo.
> Most people in the graphics world can live with that Cmyk alpha

Not sure about what you mean exactly here, but I suggest keeping in mind
two things:
1) PDF transparency does allow CMYK and alpha.
2) A semi-realistic on-screen rendering of Postscript or PDF needs to
deal with overprint, which in some respect behaves much like alpha +

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