const PangoFontDescription* desc,
const PangoFontDescription* old_match,
const PangoFontDescription* new_match
Determines if the style attributes of
new_match are a closer match
desc than those of
old_match are, or if
new_match is a match at all.
Approximate matching is done for weight and style; other style attributes
must match exactly. Style attributes are all attributes other than family
and size-related attributes. Approximate matching for style considers
PANGO_STYLE_ITALIC as matches, but not as good
a match as when the styles are equal.
old_match must match