lff files

I can't find any information about the font file format that LibreCAD uses (lff).
How are these files created?

I'm aware there is the ttf2lff converter bundled with the project.

More specifically...
Where did this file format originate?
Where is the official information regard this format?
What is the standard way of creating lff files?

Rallaz,

More specifically...
Where did this file format originate?
the format originated from QCad

Where is the official information regard this format?
I never used it, but I know some developers used the source...

What is the standard way of creating lff files?
LibreCAD should have the capability to load the LFF files, I think  you will see them as blocks then...
You can also save it again which would correctly create the LFF files.
We also have a tool to create LFF files from TTF files and that's created during the build.

 

Thanks... although I think Rallaz already knew that... ;p