Attributed text from markdown is rendered as regular text

[RealLast]

What did you do?

I created a PDF and added an attributed text generated from a markdown string. However, the text is rendered to the PDF document as plain text, without any attribution. Here is the code for reference:

init() {
    let document = TPPDF.PDFDocument(format: .usLetter)
        
    let markdownString = try? NSAttributedString(markdown: "This is a *simple* **test**")
    let textElementObject = PDFAttributedText(text: markdownString!)
    document.add(attributedTextObject: textElementObject)
                       
    let generator = PDFGenerator(document: document)
    let url = try? generator.generateURL(filename: "Example.pdf")
}

Just for completeness, I also tried the following:

let markdownString = try? NSAttributedString(markdown: "This is a *simple* **test**")
document.add(attributedText: markdownString)

What did you expect to happen?

I expected the text to be rendered like this:

This is a sample test

I.e., I was expecting that the string would be rendered considering the markdown syntax (italic and bold).

What happened instead?

The text was rendered like this:

This is a sample test

So the text was rendered without any attributes. Please check the attached PDF for the result.

It is worth noting, however, that the * are not rendered. So it seems that the markdown syntax is parsed correctly, but the attributes are simply ignored.

TPPDF Environment

TPPDF version: 2.6.0 Xcode version: 15.4 Swift version: 5

Demo Code / Project

You can download an XCode project (macOS App) from my repo The relevant code is here

And here is the generated PDF: Example.pdf