Michel,
is Your Question :
how to use / open a non installed Font => Font-File ( ???.ttf ) ?
Load a font from disk, stream or byte array.
An interesting question, I think, because there might be applications that come with their own fonts.
The obvious way to make the font available is by installing it to the font collection of the O/S.
In that case one could simply use the Font constructor that takes the font family name as its first argument and be happy.
However, there are several good reasons to decide against installing a new font to the O/S:
•Installing a font requires administrative privileges
•You don't want to clutter the font collection unnecessarily
•Your app does not have or need an installer because it's a very simple tool.
You neither want to add an installer just for installing the font, nor do you want the user to manually install a font.
Is that what You mean ???
Best Regards
Uwe