Converts a font-spec to a font description.
graphics-ports
convert-to-font-description port font-spec => fdesc
|   port⇩  |    
A graphics port.  | 
|   font-spec⇩  |    
A font description object, font or symbol.  | 
|   fdesc⇩  |    
A font-description.  | 
The function convert-to-font-description converts font-spec to a font description object fdesc for the graphics port port. If font-spec is a font, then its description is returned. If font-spec is a font description object, then it is returned. If font-spec is a symbol naming a font alias, then convert-to-font-description converts this alias to a font and returns its font description. Other platform-specific values of font-spec are also accepted.
CAPI User Guide and Reference Manual (Macintosh version) - 01 Dec 2021 19:31:44