Font Name versus Font Reference

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Font Name versus Font Reference

Font Name versus Font Reference

2007-11-10 - By Bruno Lowagie

Back

Reply: 1 2

Brad Wilmot wrote:
> I'm reading a PDF file that has six Type1C fonts embedded.
> These fonts have names such as APAMDB+NewAgeItalic
> In the content stream, there are references to the fonts such as /F11 1 Tf
>
> I do not understand how a font reference of F11 can be associated with
> the NewAgeItalic reference.

> I just can't see in the book how the association between the two is made.

That's discussed in Chapter 18.
First read about the file structure of a PDF document
and about the different objects. Then have a look at
the PDF snippet on p574, more specifically the Font entry
in the Resources dictionary of a Page dictionary:
/Font <</F1 2 0 R >>
This means that whenever the syntax of the page content stream
refers to a font /F1, the PDF viewer should look for the necessary
font information in the second object ("2 0 R" is a reference to
the object "2 0 obj" in the file).
Figure 18.2 shows what would happen if you'd copy a page content
stream with a reference to a font (for instance /F11, or /Blahblah
or ...), but without copying the font that is referred to.

The PDF Reference is a very useful resource if you want
to dig deeper into this subject.
br,
Bruno

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