cairo:region-extents (region)

region -- a cairo:region-t instance
x -- an integer for the x coordinate of the left side of the rectangle
y -- an integer for the y coordinate of the top side of the rectangle
width -- an integer for the width of the rectangle
height -- an integer for the height of the rectangle

The (x y width height) list with the coordinates of the bounding rectangle.

Gets the bounding rectangle of region as a list of the coordinates.