(v13) Example: Primitive bi-level screen (htm4x4)

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

The htm4x4 example implements a primitive bi-level halftone that could not be produced using conventional PostScript thresholds, because pixels can be extinguished as well as lit when moving from one shade to a darker shade.

It is not intended to produce screening of any quality or value the objective being only to demonstrate the mechanisms used.

The PostScript language configuration file CMYKCompHtmEgBand300dpi is provided to demonstrate how modular screening is invoked, and as distributed demonstrates the htm4x4 example screening.

The CMYKCompHtmEgBand300dpi configuration file can be found at:

\HHR_XXrX\SW\TestConfig

See “Screening Module Examples” in the “Modules” section of in doc\lekithtml\lekitdoc.chm for more information.

The code for this example is in the files htm4x4.c and htm4x4.h.