(v13) Spot function names

This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.

This section describes the available spot functions with their PostScript-language names, and their index number and comments on PDF usage where appropriate.

A PDF: entry shows where the spot function has a different name or availability to that in the PostScript language. These examples show the possible entries:

`PDF: EllipseC`	shows that a PDF job specifying `EllipseC` uses `EllipseCAdobe` as seen from PostScript language in the RIP.
`PDF: Not available`	shows that a PDF job cannot access the labeled spot function.
`PDF: RIP Extension`	Indicates that this is a spot function provided in addition to those defined in [PDF1.2].

All names marked as Not available have a related name ending in Adobe. These are provided where there is a Harlequin spot function with the same name as, but a different appearance from, the spot function as used from PDF jobs. This is done so that PDF spot functions have their exact representation.

The RIP does not limit the name values that can be used for the /SpotFunction key in a Halftone dictionary in a PDF file. Any spot function requested triggers a Halftone resource look-up by name. If the requested screen is not found the job will fail with an undefinedresource error.

An Index: entry shows the (deprecated) index value for the screen, for use with the OverrideSpotFunction system parameter.

Index: 5 shows that you can access the spot function using index 5.

Name (and comments)

Samples for: 20%, 40%, 50%, 60%, and 80%

CosineDot