plug-in-newsprint

Austin Donnelly

Description

Halftone the image to give newspaper-like effect

Help

Halftone the image, trading off resolution to represent colors or grey levels using the process described both in the PostScript language definition, and also by Robert Ulichney, "Digital halftoning", MIT Press, 1987.


Type

unknown

Parameters

Type Name Description
PF_INT run-mode The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }
PF_IMAGE image Input image (unused)
PF_DRAWABLE drawable Input drawable
PF_INT cell-width Screen cell width in pixels
PF_INT colorspace Separate to { GRAYSCALE (0), RGB (1), CMYK (2), LUMINANCE (3) }
PF_INT k-pullout Percentage of black to pullout (CMYK only)
PF_FLOAT gry-ang Grey/black screen angle (degrees)
PF_INT gry-spotfn Grey/black spot function { DOTS (0), LINES (1), DIAMONDS (2), EUCLIDIAN-DOT (3), PS-DIAMONDS (4) }
PF_FLOAT red-ang Red/cyan screen angle (degrees)
PF_INT red-spotfn Red/cyan spot function (values as gry-spotfn)
PF_FLOAT grn-ang Green/magenta screen angle (degrees)
PF_INT grn-spotfn Green/magenta spot function (values as gry-spotfn)
PF_FLOAT blu-ang Blue/yellow screen angle (degrees)
PF_INT blu-spotfn Blue/yellow spot function (values as gry-spotfn)
PF_INT oversample how many times to oversample spot fn

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