freetypy.TT_OS2.typo_line_gap¶
-
TT_OS2.
typo_line_gap
¶ The typographic line gap for this font. Remember that this is not the same as
TT_HoriHeader.line_gap
, which Apple defines in a far different manner.The suggested usage for
typo_line_gap
is that it be used in conjunction withTTHeader.units_per_em
to compute a typographically correct default line spacing. Typical values average 7-10% of units per em. The goal is to free applications from Macintosh or Windows-specific metrics which are constrained by backward compatability requirements. These new metrics, when combined with the character design widths, will allow applications to lay out documents in a typographically correct and portable fashion.