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Represents the "Width" entry of the type 6 halftone dictionary
object.
It is a required entry defined as part of the PDF 1.0
specification.
It contains an integer representing a PDF numeric object.
For definitive details see:.
The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 131,
page 310.
The ISO PDF
Specification, ISO 32000-2:2017 PDF 2.0; Table: 129, page 372.
This value sets the number of columns in the threshold table.
The stream body must contain exactly Width times Height bytes; a
stream with a different length is malformed.
A wider cell can represent more complex dot shapes and screen
angles, but it also uses more memory and takes longer to tile
across a page. Very small cells repeat frequently and may produce
visible repetition in textured areas.
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