pango-font-description-size-is-absolute (desc)

desc -- a pango-font-description instance

Whether the size for the font description is in points or device units.

Determines whether the size of the font is in points (not absolute) or device units (absolute). See the functions pango-font-description-size and pango-font-description-set-absolute-size.

Use the function pango-font-description-set-fields to find out if the size field of the font description was explicitly set or not.