Font open_font(string fontname, int size, int flags, int|void force)
Find a suitable font in the directories specified with set_font_dirs .
flags is a bitwise or of 0 or more of ITALIC , BOLD and NO_FAKE .
fontname is the human-readable name of the font.
If force is true, a font is always returned (defaulting to arial or the pike builtin font), even if no suitable font is found.