Refreshes the state of the underlying FT_Face of font when the hb_font_t
font has changed.
This function should be called after changing the size or
variation-axis settings on the font.
This call is fast if nothing has changed on font.
Note that as of version 11.0.0, calling this function is not necessary,
as HarfBuzz will automatically detect changes to the font and update
the underlying FT_Face as needed.
Refreshes the state of the underlying FT_Face of
fontwhen the hb_font_tfonthas changed. This function should be called after changing the size or variation-axis settings on thefont. This call is fast if nothing has changed onfont.Note that as of version 11.0.0, calling this function is not necessary, as HarfBuzz will automatically detect changes to the font and update the underlying FT_Face as needed.