PDFDocEncodingToRunes decodes PDFDocEncoded byte slice `b` to unicode runes.

PDFDocEncodingToString decodes PDFDocEncoded byte slice `b` to unicode go string.

StringToPDFDocEncoding encoded go string `s` to PdfDocEncoding.

StringToUTF16 encoded `s` to UTF16 and returns a string containing UTF16 runes.

UTF16ToRunes decodes the UTF-16BE encoded byte slice `b` to unicode runes.

UTF16ToString decodes the UTF-16BE encoded byte slice `b` to a unicode go string.