Search code examples
.netfontspdf-generationitext7

What's the difference between RegisterSystemDirectories and other methods

I'm using the iText 7 .NET dll and I want to know what's the difference between the PdfFontFactory.RegisterSystemDirectories() methods and the following ones:

  • PdfFontFactory.CreateRegisteredFont("calibri", PdfEncodings.IDENTITY_H, True)
  • PdfFontFactory.RegisterDirectory("C:\Windows\Fonts\Calibri")
  • FontProgramFactory.RegisterFontDirectory("C:\Windows\Fonts\Calibri")
  • FontProgramFactory.CreateRegisteredFont("calibri")

Because when I ask for PdfFontFactory.GetRegisteredFonts(), the result is only impacted by the first one, not by the others.

I've sometimes an OutOfMemoryException and I saw that the RegisterSystemDirectories increase the memory by 500 mb whereas I only need of 12 family fonts ("arial", "calibri", "comic", "georgia", "lucida", "segoe", "times", "trebuchet", "verdana", "consola"). If I don't register them, when I add a paragraph with one of these fonts to my PdfDocument, an exception occured: "Invalid font type".

So I search a solution to register only these families.

Thank you very much.

Solution

  • I don't have/find any answer about my question yet, but I found another method which does what I want : PdfFontFactory.Register("C:\Windows\Fonts\CALIBRI.TTF"). I should to do that for each font I want to use, but it saves until 400 mb of memory!