The leading value in Macintosh fonts is the space between lines,
defined as the space between a descent line and the ascent line
below it. Clients need this to draw text and calculate its height
as classic Macintosh did.
MacFontManager didn't have a mechanism to report which fonts it loaded
from an external resource. It also requires that any fonts that aren't
built-in be explicitly registered by name by the client before they can
be used. This combination meant that a client couldn't load fonts from
an external file and use them by their properties (id / size / style).
SCI contains Mac fonts in its executable along with a table that maps
each SCI font id to a Mac font id and size. The font name isn't a part
of this since the Classic Mac Toolbox API took id / size / style as
input when drawing text.
Now MacFontManager exposes the font families it has loaded along with
their names. This allows a client to see which fonts were loaded,
register them by name, and proceed to use them with the existing API.
sluicebox
Eugene Sandulenko
ysj1173886760
Thierry Crozat