(v13) HVD External mode

This page applies to Harlequin v13.1r0 and later; and to Harlequin Core but not Harlequin MultiRIP.

To turn on the HVD external mode optimization, use the following PostScript language fragment:

<< /EnableOptimizedPDFScan /Always
	/OptimizedPDFScanLimitPercent 25
	/OptimizedPDFExternal true
	/OptimizedPDFCacheID (OEM_HHR_PDF_HVD)
>> setpdfparams

When recomposing raster elements, it is usual to mask them. In HVD external mode, configure ContoneMask as follows:

<<
  /ContoneMask -1
>> setpagedevice

A negative value indicates masking should be done by the RIP only when external HVD is being applied to the current set of pages (in which case the absolute value is used).

Two example raster backends that support HVD external mode are provided: HVDNONE and HVDRAW. For more information see the Harlequin Core SDK Developer’s Guide.