I am having trouble with tikz's way of handling colors in patterns. It seems that the problem is linked to the pdf code written by pgf at system level. Following @DavidCarlisle advice, I read some parts of the pdf specification book. But I still have some basic questions about it (googling for questions on the pdf format is not that easy...). So,

  • can I ask on tex.se some questions about the pdf format (and if it's ok, should I edit my original question or create a new one)?
  • if not, where should I ask?
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    I think questions related to output drivers, be it pdftex, dvips or whatever are perfectly ok here.
    – AlexG
    Dec 12, 2013 at 11:33
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    IMHO: As long as it's not about how pdftex treats the PDF format, but about how does FOO works in PDF format, they are off-topic here.
    – yo'
    Dec 12, 2013 at 14:34
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    @cjorssen: Stackoverflow. The pdf experts are there. Dec 14, 2013 at 0:16

1 Answer 1


You have given the necessary connection to TeX yourself. This means IMO the question is perfectly on topic here.

Although the site description explicitly mentions "Related software and tools, BibTeX, MakeIndex, Lyx, etc.", I don't think a question about PDF as produced by pdftex would be any less on topic than a question about arara or configuring some editor to edit .tex files.

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    Indeed. Especially since at least two experts on "PDF as produced by pdftex" are active here. :-) Dec 14, 2013 at 0:16

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