[luatex] Getter functions: pdfe.getXXX() vs pdfe.getfromXXX()

[Andreas Matthias]

Lately I got pretty confused about all these getXXX() and getfromXXX()
functions. So I started to hand craft a PDF (adding entries for all
kinds of PDF types), and then read back these values with luatex.
The result is a table of these getter functions and their return values.

I just thought I'd share this information with you. Maybe it's useful
for some of you.

The PDF ('test.pdf' see attachment) is quite simple to read (formatted with
mutools), and you can easily compare the particular PDF objects with
the output of the getter functions of luatex. (I added all theses
/testXXX entries
in object number 2 of the PDF.)

Run

   texlua info.lua

to see the output in the terminal. Sorry, there's no PDF output.

Of course all this information is available in the documentation of
luatex as well, but I think it's nice to have some test files to see
what's going on.


Best regards
Andreas
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