PDFiumSharp | .NET wrapper around Google 's PDFium library | Document Editor library

I'm trying to add a custom font (otf file or for testing purpose ttf) to my PDF document to render text page objects with. The rendered text is always the same gibberish like ÿÿÿÿÿÿe ('e' might be the last char of my string or a random character). Creating, rendering and adding other objects like paths or images are working fine. So I'm guessing the font isn't loaded correctly.

I'm using an updated version of the C# wrapper PDFiumSharp ( https://github.com/ArgusMagnus/PDFiumSharp ), which provides the following methods: FPDFText_LoadFont(document, FontType, IsCid, byte[] fontData) and FPDFPageObj_CreateTextObj(document, FPDF_Font font, size). The wiki of PDFiumSharp states that through LoadFont the font is loaded into the document. The code snippet following runs through without problems (so fontpath is correct, can be loaded and the text object can be created).

I exchanged the pdfium.dll with the newest one from https://github.com/bblanchon/pdfium-binaries, which includes the entry point FPDF_LoadFont too.

There is also another entry point FPDF_InitLibraryWithConfig, which gets a FPDF_LIBRARY_CONFIG as argument. This config holds a readonly field IntPtr _userFontPaths, which might me usable somehow, but I haven't find a way to set this.