gdk:monitor-geometry (object)

object -- a gdk:monitor object
geometry -- a gdk:rectangle instance for the monitor geometry

The accessor for the geometry slot of the gdk:monitor class retrieves the size and position of an individual monitor within the display coordinate space. The returned geometry is in "application pixels", not in "device pixels". See the gdk:monitor-scale-factor function for the internal scale factor that maps from monitor coordinates to device pixels.

Since 3.22