font
objects are returned by find-best-font and find-matching-fonts.
font
objects are used to specify fonts for drawing, either in the graphics-state of the port or in the drawing functions themselves. font
objects can also be used for querying the actual attributes of the font (ascent, descent and so on) and the dimensions of character and strings.
font-description
find-best-font
find-matching-fonts
graphics-state
get-font-ascent
get-font-descent
get-font-width
get-font-height
get-font-average-width
get-char-width
get-char-ascent
get-char-descent
get-character-extent
get-string-extent
compute-char-extents
font-single-width-p
font-fixed-width-p
font-dual-width-p
CAPI User Guide and Reference Manual (Unix version) - 3 Aug 2017