Description of a font's details.
Fields
int height The total height of the font in pixels (this is the maximum height of the tallest glyph in the entire typeface).
int ascent Of the height, how much is 'ascent' above the 'baseline' (which is an imaginary 1 pixel line).
int descent Of the height, how much is 'descent' below the 'baseline' (which is an imaginary 1 pixel line).
int lineskip The recommended number of pixels between lines (this is an optional typeface attribute which might be 0).