code: public void registerFont(String name, String path) {
      try {
        _fonts.put(name, ((JavaAssets) assets()).requireResource(path).createFont());
      } catch (Exception e) {
        platform.reportError("Failed to load font [name=" + name + ", path=" + path + "]", e);
      }
    }
docs: Registers a font with the graphics system.
  
  @param name the name under which to register the font.
  @param path the path to the font resource (relative to the asset manager's path prefix).
  Currently only TrueType ({@code .ttf}) fonts are supported.