A `GdkRectangle` data type for representing rectangles.
`GdkRectangle` is identical to `cairo_rectangle_t`. Together with Cairo’s `cairo_region_t` data type, these are the central types for
representing sets of pixels.
The intersection of two rectangles can be computed with [method@Gdk.Rectangle.intersect]; to find the union of two rectangles use [
method@Gdk.Rectangle.union].
The `cairo_region_t` type provided by Cairo is usually used for managing non-rectangular clipping of graphical operations.
The Graphene library has a number of other data types for regions and volumes in 2D and 3D.