Computes the logical and ink extents of @layout in device units.
This function just calls [method@Pango.Layout.get_extents] followed by
two [func@extents_to_pixels] calls, rounding @ink_rect and @logical_rect
such that the rounded rectangles fully contain the unrounded one (that is,
passes them as first argument to pango_extents_to_pixels()).
Computes the logical and ink extents of @layout in device units.
This function just calls [method@Pango.Layout.get_extents] followed by two [func@extents_to_pixels] calls, rounding @ink_rect and @logical_rect such that the rounded rectangles fully contain the unrounded one (that is, passes them as first argument to pango_extents_to_pixels()).