[cairo] Spot colors (and CMYK)

Chris Wilson chris at chris-wilson.co.uk
Thu Jan 14 02:51:04 PST 2010

On Thu, 14 Jan 2010 10:19:26 +0100, "Francois Robert" <frobert at atex.com> wrote:
> A few of observations, obviously skewed toward the printing business
> (after all those are the CMYK / spot users):

And you've identified just why getting this right is difficult. We've been
told in the past not to do colorspaces for printing, as doing the
conversion is ink dependent and is best left to the printers. However, the
information on spot inks is fascinating and is definitely beyond Cairo's
current capabilities. It sounds like each ink should be in its own layer
to overlaid onto of the base "RGB" layer, acting as a mask for the ink.
Layer management should be above Cairo, but we would need additional hooks
in the PDF backend (and friends?) to include the addition spot ink +

Is this even close?

Chris Wilson, Intel Open Source Technology Centre

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