Does anyone here know if the Quartz engine is capable of handling the
PDFX
format and deliver separated files out of a CMYK+Spot color PDF?
In Rip Separations.
Is there a PDF command line needed to do separations?
Quartz is not a generic PDF engine.
Rather, Core Graphics uses PDF as a metafile format. Quartz can create
a PDF that records the drawing commands that are sent to a CGContext,
but that's about the extent of it's PDF generation capabilities. To
put it another way, you can create a Quartz metafile that is a PDF
file, but not all PDF files are Quartz metafiles. It is very easy to
create a PDF that contains features which are not supported by Quartz.
Features like in-rip separation, OPI comments, and the like are not
part of the Quartz imaging model and, as a result, the CGContext API
does not support them. Consider, for example, the concept of sending
in-rip separation commands and/or spot colors to a CGContext attached
to a window... it doesn't make much sense.
If you want to use some of the more task specific features of PDF then
you will have to augment Quartz with other applications. You could
take a PDF generated by Quartz with CMYK colors and pass it through an
additional application to generate separations, trappings, and other
prepress effects. I'm not really sure how you would go about putting
spot colors in Quartz metafile. Perhaps you could do something by
defining an ICC profile for a named color space that contains the spot
color?
At any rate, you will have to look to third parties for tools that
generate separations for PDF files.
Scott
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