UserScaledFontUnicodeToGlyphFunc
  
  Description:
  [ 
CCode ( cname = 
"cairo_user_scaled_font_unicode_to_glyph_func_t" ,  has_target = 
false ) ]
public delegate Status UserScaledFontUnicodeToGlyphFunc (
UserScaledFont scaled_font, 
ulong unicode, 
out ulong glyph_index)