LibreOffice was able to display curve-based multi-line fontwork text, but the text palcement was good only on the base line.
It has now been improved by calculating separate curves for separate lines, and some issues have been fixed.
Come and see how this is implemented, what math is behind the curve calculation and the text placement.
What were the challenges, and what still needs to be solved. (there are some interesting impossible cases)
See how MS word handle them compared to Libreoffice.