common-lisp:structure-object, common-lisp:t

None

The gdk-rgba structure is used to represent a (possibly translucent) color, in a way that is compatible with Cairo's notion of color.

(define-g-boxed-cstruct gdk-rgba "GdkRGBA"
  (red :double :initform 0.0d0)
  (green :double :initform 0.0d0)
  (blue :double :initform 0.0d0)
  (alpha :double :initform 0.0d0))  

red

The intensity of the red channel from 0.0 to 1.0 inclusive.

green

The intensity of the green channel from 0.0 to 1.0 inclusive.

blue

The intensity of the blue channel from 0.0 to 1.0 inclusive.

alpha

The opacity of the color from 0.0 for completely translucent to 1.0 for opaque.