[pdftex] Forward looking object references

[Andreas Matthias]

Igor Khomyakov wrote:

> Below please find the PDF example that was initially created with pdfTeX,
> and then edited manually. This example shows that in PDF we can use forward
> references! Please check out object 1000. I believe that this document can
> be quite easily generated in one pass -- the object (xform) is at the very
> end of the file -- we do have necessary information by that time.

[example]

This is a nice example. Just two remarks that might be of
interest:

* Ghostscript cannot display this pdf file.
  Tested with AFPL Ghostscript 8.00.

* Try to insert this pdf into another one, like:
    \pdfximage{test.pdf}
    \pdfrefximage\pdflastximage
    \end
  Now AR5 does not display the XObject. Only AR4 accomplishes this.

Seems like some pdf-viewers have problems with XObjects of that kind.


Ciao
Andreas