Cyrillic Letters in PDF Metadata Created by FO.NET

Has anyone succeeded in showing Cyrillic letters in the metadata of a PDF file that is generated by FO.NET? I tried the following code, but the metadata of the generated PDF displays only "Title: ??????":

FonetDriver driver = FonetDriver.Make();

PdfRendererOptions options = new PdfRendererOptions();
options.FontType = FontType.Embed;
options.Title = "Title: Услуги";
driver.Options = options;开发者_高级运维

driver.Render("Input_cyrillic.fo", "Output.pdf");

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Here is the link to discussion on their forum. It seems to be that they don't support Unicode at all due to MapCharacter method has this hardcoded:

ushort charIndex = CodePointMapping.GetMapping("WinAnsiEncoding").MapCharacter(c);

It also seems that the recent version has the same problem.

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I do not know the details of FO.NET, but generally "text string" types in PDF can hold UTF-16 data (not UTF-8!) if you prepend the string with hex FEFF (the UTF byte order mark - BOM). In PHP it looks like this:

$pdfTitle = "\xfe\xff" . mb_convert_encoding($myTitleString, "UTF-16BE", "UTF-8");

This converts the title from UTF-8 to UTF-16 and prepends it with the BOM.

See the PDF docs for details: http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf
(chapter 7.9.2.2: "Text String Type")