Favicon_svgSourceval of_unicode :
font_size:Core.Percent.t ->
?background_color:Css_gen.Color.t ->
?font_color:Css_gen.Color.t ->
?pos_x:Core.Percent.t ->
?pos_y:Core.Percent.t ->
string ->
tSVG favicon displaying given unicode string, scaled to fit the space.
For best effects, use a single character (there is plenty to choose from in unicode, e.g. emojis!) or a short string.
font_size is relative to the size of the icon. 0.9 is a reasonable starting point, but you might need to tune it.
font_color only makes sense for text or b&w emojis / symbols.
Use to_svg_file_content to save to file, or as ~contents argument to Cohttp_static_handler.What_to_serve.Embedded