PDF::Class ā CalGray
[Raku PDF Project] / [PDF-Class Module]
CalGray colour space dictionary
has Positional[Numeric] @.WhitePoint
(Required) An array of three numbers [ XW YW ZW ] specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse white point. The numbers XW and ZW must be positive, and YW must be equal to 1.0.
has Positional[Numeric] @.BlackPoint
(Optional) An array of three numbers [ XB YB ZB ] specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse black point. All three of these numbers must be non-negative. Default value: [ 0.0 0.0 0.0 ].
has Numeric $.Gamma
(Optional) A number G defining the gamma for the gray (A) component. G must be positive and is generally greater than or equal to 1. Default value: 1.