是否有 windows GetFontData function 的 Mac OSX 版本？

Question

We have an application that allows our users to generate print-ready PDF documents using variable data (names, titles, phone numbers, etc) that their customer's enter via an online e-commerce website. To facilitate the variable data we have to embed a font's entire character map. On windows we have been using the windows API function GetFontData(...) like so:

#ifdef Q_WS_WIN
    //this is windows specific code
    HDC DC = CreateCompatibleDC(NULL);
    HFONT hFont = font.handle();
    HFONT oFont=(HFONT)SelectObject(DC,hFont);

    DWORD fontLength = ::GetFontData(DC, 0, 0, 0, 0);

    if(fontLength != GDI_ERROR)
    {
        fontData.GrowAllocation(fontLength);

        if(::GetFontData(DC, 0, 0, fontData.GetBuffer(), fontLength) == GDI_ERROR)
        {
            fontData.Clear();
        }
        else
        {
            fontData.SetLength(fontLength);
            returnVal = true;
        }
    }

    SelectObject(DC,oFont);
    DeleteDC(DC);
    //End of windows specific code
#elif defined(Q_WS_MAC)



#endif

This technique works very successfully on our windows specific version; however, we are porting the application to Qt to target the Mac OSX platform.

My first question: Is there a Qt way of accessing the raw font data from a QFont, QFontDatabase, etc. that we could use to embed in the pdf? We have been unable to find a way. Notice the #ifdef wrapper in the above code. Note that the variable fontData is a self contained memory buffer that manages its own memory, please disregard.

My second question: If there is no Qt way of accessing the font data in an OS agnostic way, what is the OSX equivalent to the windows GetFontData?

Thanks

Answer 1

I've only skimmed documentation for GetFontData , and I don't know much about Qt (though it does sound like a Qt solution would be preferable), but you might want to look at the ObjC class for fonts, NSFont .

Answer 2

The latest (until Apple hires new font people and gets infected with not-invented-here disease again) text and font API is Core Text . I never used it since chasing Apple's mood is harmful to my personal and organization's financial health, I stopped using any Apple-only API. :)

Kidding aside, it looks like CTFont does provide access to all tables in a font. I don't see anything that prepares a font for embedding but this probably gives you the best chance.