[cairo] Spot colors (and CMYK)

[ecir hana]

On Wed, Feb 17, 2010 at 9:26 PM, Bill Spitzak <spitzak at gmail.com> wrote:
> Kai-Uwe Behrmann wrote:
>
>> By deploying a sRGB float model the colour conversion from input space
>> to blending space, in this case a fixed sRGB, is just moved outside
>> cairo. The cost for that is no support of deviceN and alternative
>> blending spaces. I would never ever think of blending each colour space
>> with each other. If thats what you are afraid of, I can only agree. That
>> would not be supportable in cairo. But it is not what was suggested.
>
> Okay that is good to know.

Maybe I misread here but "I would never ever think of blending each
colour space with each other." is exactly what is needed. You create
RGB image surface so you can bit blit it on the screen. And you paint
a CMYK picture over it.

If you are saying I first have to convert my CMYK to sRGB so I can
compose it over my image surface, how do I send that CMYK to PDF?