(gobject:define-genum "GdkVisualType" visual-type
  (:export t
   :type-initializer "gdk_visual_type_get_type")
  (:static-gray 0)
  (:grayscale 1)
  (:static-color 2)
  (:pseudo-color 3)
  (:true-color 4)
  (:direct-color 5))  

:static-gray

Each pixel value indexes a grayscale value directly.

:grayscale

Each pixel is an index into a color map that maps pixel values into grayscale values. The color map can be changed by an application.

:static-color

Each pixel value is an index into a predefined, unmodifiable color map that maps pixel values into RGB values.

:pseudo-color

Each pixel is an index into a color map that maps pixel values into RGB values. The color map can be changed by an application.

:true-color

Each pixel value directly contains red, green, and blue components. Use the gdk:visual-red-pixel-details function, etc, to obtain information about how the components are assembled into a pixel value.

:direct-color

Each pixel value contains red, green, and blue components as for :true-color, but the components are mapped via a color table into the final output table instead of being converted directly.