The cpdf_set_font() function sets the current font face, font size and encoding. Currently only the standard postscript fonts are supported. 성공일 경우 TRUE를, 실패일 경우 FALSE를 반환합니다.
The last parameter encoding can take the following values: "MacRomanEncoding", "MacExpertEncoding", "WinAnsiEncoding", and "NULL". "NULL" stands for the font's built-in encoding.
See the ClibPDF Manual for more information, especially how to support Asian fonts.