edouard@3925: Include fonts in HMI
edouard@3925: ====================
edouard@3925: 
edouard@3936: Text inside HMI designed with Inkscape may not display properly in web browser.
edouard@3936: The reason is that Inkscape and targeted web browser may disagree on fonts support.
edouard@3925: 
edouard@3936: To keep HMI text design consistent, missing fonts can be added to project in order
edouard@3936: to have them served together with HMI so that web browser can support them.
edouard@3936: 
edouard@3936: Fonts used by Inkscape
edouard@3936: ----------------------
edouard@3936: 
edouard@3936: * System fonts
edouard@3936: 
edouard@3936:     Vector fonts available at system level are systematically available
edouard@3936:     in Inkscape
edouard@3936: 
edouard@3936: * User fonts
edouard@3936: 
edouard@3936:     When selected in Inkscape preferences, Inkscape also considers fonts
edouard@3936:     from these sources:
edouard@3936: 
edouard@3936:     - "fonts" directory in Inkscape user's directory
edouard@3936: 
edouard@3936:     - arbitrary absolute font directories set by user 
edouard@3936: 
edouard@3936:     There is no way to point to a directory relative to the SVG file
edouard@3936:     being edited.
edouard@3936:     At the time of writing this documentation, Inkscape doesn't support
edouard@3936:     embedding font in SVG file.
edouard@3936: 
edouard@3936:     User then have to regularly update Inkscape preferences to ensure
edouard@3936:     that fonts used in currently edited design are available when editing
edouard@3936:     it.
edouard@3936: 
edouard@3936: 
edouard@3936: Supported font types in SVGHMI
edouard@3936: ------------------------------
edouard@3936: 
edouard@3936:     * Web Open Font Format 1 and 2
edouard@3936: 
edouard@3936:         ``.woff```, ``.woff2``
edouard@3936: 
edouard@3936:     * TrueType fonts
edouard@3936: 
edouard@3936:         ``.ttf``
edouard@3936: 
edouard@3936:     * OpenType fonts
edouard@3936: 
edouard@3936:         ``.otf``
edouard@3936: 
edouard@3936:     .. note:: 
edouard@3936: 
edouard@3936:         In order to be embedded in HMI, fonts are encoded base64 
edouard@3925: 
edouard@3925: Add/remove fonts
edouard@3925: ----------------