PictureMask-class: Class '"PictureMask"'
In sjp/grImport2: Importing Vector Graphics

A description of a luminance mask.

content:: Object of class "list". A list of "PictureContent" objects that are use to define the mask. Typically objects that actually draw content (e.g. a path or a rect).

Class PictureContent, directly.

grobify

signature(object = "PictureMask"): creates a mask object for use with the gridSVG package. Not intended to be used directly.

There are three arguments to this grobify method:

defs: An object of class "PictureDefinitions". This object is primarily useful in conjunction with the gridSVG package.
gpFUN: This argument takes a function that takes a gpar object and returns a modified gpar object. The default value is the identity function.
ext: A character vector. See grid.picture for more information on what this extension selection parameter means, in addition to the valid values this argument takes.