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Unintended Consequences of Using GPL Fonts

innocent_white_lamb writes "An interesting discussion has surfaced on the Scribus mailing list. Simply stated, it appears that using GPL-licensed fonts in a document makes your document subject to the GPL. There are a lot of consequences here, such as internal corporate communications. It appears to make the use of GPL fonts undesirable in almost any document." Yes, it sounds crazy, but the experimental font-exception addition to the GPL (linked from the discussion) lends the idea some credence.

13 of 514 comments (clear)

  1. I'm not sure thats right... by Artega+VH · · Score: 5, Informative

    From the GPL Faq

    As a special exception, if you create a document which uses this font, and embed this font or unaltered portions of this font into the document, this font does not by itself cause the resulting document to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the document might be covered by the GNU General Public License. If you modify this font, you may extend this exception to your version of the font, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. (emphasis mine)

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    groklaw, wired and slashdot. The holy trinity of work based time wasting.
    1. Re:I'm not sure thats right... by Artega+VH · · Score: 5, Informative

      After reading my own comment I think I see the problem...

      Also from the GPL Faq is that you need to specifically add the exception text to the license. If this was not done then yes there is a problem.. Otherwise then there wouldn't be... As per usual the slashdot blurb is a bit sensationalist...

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      groklaw, wired and slashdot. The holy trinity of work based time wasting.
    2. Re:I'm not sure thats right... by shellbeach · · Score: 4, Informative

      Also from the GPL Faq is that you need to specifically add the exception text to the license. If this was not done then yes there is a problem.. Otherwise then there wouldn't be... As per usual the slashdot blurb is a bit sensationalist...

      Actually, the important point in the FAQ you quoted is that it only applies to embedded fonts. Thus the /. blurb is completely wrong AFAICS - you can use the font without any license restrictions being imparted on your own documents provided you don't embed it in the document. So while this may be an issue if you send off artwork to a printhouse, if you don't embed the fonts but just include a copy of each font (and relevant license info) along with the artwork I'm guessing that should be fine.

    3. Re:I'm not sure thats right... by Elwood+P+Dowd · · Score: 4, Informative
      But the main BS angle from the writeup is this:
      it appears that using GPL-licensed fonts in a document makes your document subject to the GPL. There are a lot of consequences here, such as internal corporate communications.
      Even if using a GPL font requires all documents using that font to be GPLed, that doesn't make your business document GPLed. It means that you cannot legally distribute your business document except under the GPL, which is very very different. If you illegally distribute your document not under the GPL, you've committed a copyright violation. That still doesn't put it under the GPL. It just means that you will have to stop publishing the document until you stop using the infringing copyrighted material, and you may be liable for the infringement you've already done. Still, the GPL has not been applied to anything you've produced.

      This just means that GPLed fonts are unusable for non-GPLed documents, not that you'll accidentally GPL your document. Assuming that it's true in the first place. So stop using the unusable fonts, and you'll be fine.
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      There are no trails. There are no trees out here.
  2. Re:Seems a little silly to me. by ComputerSlicer23 · · Score: 4, Informative
    The GPL requires that you put no further limitations on the re-distribution of said document.

    I'll also point out that for a LaTeX document, I'm not giving you the prefered source format. If I generated the document from LaTeX source, and gave you the PDF version with an embedded GPL'ed font, you could easily claim I didn't give you the "preferred format". If I printed the document and handed it to you, that's not in electronic format, which is against the GPL (I'd have to at the very least give you a written offer for the document in electronic format good for at least 3 years if I remember the clauses correctly).

    You couldn't print Trade Secrets in a font that is GPL'ed, as it would inheriently have more limitations added to it that the GPL doesn't allow.

    Personally, I think GPL'ing a font is a lot like me saying I'm GPL'ing the blueprints to my house. It doesn't make any sense. I suppose it makes some, in the context of a derived work. However, I'm fairly doubtful it'd stand up to scruity in court. It probably means you are a copyright infringer, but as a license, it's fairly incoherent when applied to a font.

    Kirby

  3. Re:How does this differ... by Noksagt · · Score: 4, Informative
    First of all, if you haven't changed the font itself, you have no obligation to provide it to anyone - Just like with GPL'd software.
    While your analogy holds true for LGPL, it doesn't for the GPL. ANY redistribution of GPLed software is bound by the GPL & that says that any DERIVED WORKS of GPLed software must also be GPLed. Which is why coders who are writing software under a license more restrictive than the GPL avoid GPLed libraries.
  4. Re:Presensation by Anonymous Coward · · Score: 4, Informative

    Worth mentioning is something Adobe came up against when attempting to copyright fonts in the completeness.

    You can't copyright the font face, what a font looks like. I don't know whether this is a specific exception in copyright law for fonts and other entities like them however.

    What you can copyright are all the other particular parts to the font such as kerning & positioning info, the particular set of characters in the font, or the font file itself (whatever format it may be).

    No matter whether you use a GPL font, or one of Adobe's most expensive & protected DRM'd font, the font copyright owner has absolutely no hold over works created with that font whatsoever.

  5. Re:Doesn't make sense by m50d · · Score: 4, Informative

    Far closer to a gpl-ed library, because the font is part of the finished product - the letters of the font are in the document. No ide code ends up in the finished program

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    I am trolling
  6. Re:Presensation by rebeka+thomas · · Score: 5, Informative

    Exactly. Look at the font faq regarding font face copyrightability.

    You cannot copyright the typeface itself, so documents printed from a font have no link legally with the font used to create it. That's embedded as a specific exception in copyright law.

    You can't embed the font file itself or substantial pieces of the data that created it in a document (such as a PDF) without permission from the owner, and it is there that GPL exceptions may be needed to prevent the entire document from becoming GPL.

    If anybody tells you that a typeface on a document you have created is GPLd, then that has absolutely no legal weight. Can't copyright font typefaces, fullstop.

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    RST
  7. Re:And you say GPL isnt viral by evanbd · · Score: 4, Informative
    Nothing against BSD, I've made use of it, but I prefer the GPL and want to make sure things are kept clear about it.

    There is exactly one way for code you wrote to end up under the GPL: you put it there explicitly. No other way. None.

    That said, if you used GPLed code in writing it, and don't put it under the GPL, you're committing copyright infringement. You don't have permission to use GPL code in non-GPL projects (unless there's some dual license thing going on or something). So yes, releasing a font under the GPL is going to restrict its use. But, if you didn't realize the font was GPLed, your document isn't suddenly GPL -- you just aren't allowed to distribute it, because you don't have a license to redistribute the font, since you're not using the GPL. So, if someone releases a non-GPL document using a GPL font, the normal course would be for someone to point it out to them, and them to take corrective action (possibly with an intermediate legal proceeding). That corrective action could be to stop distribution of the document, use a different (non-GPL) font, or to put the document under the GPL. But there are no examples of someone being forced to GPL code they didn't want to.

  8. No, it doesn't. by anthony_dipierro · · Score: 4, Informative

    Simply stated, it appears that using GPL-licensed fonts in a document makes your document subject to the GPL.

    No it doesn't. A derivative work which is derived from both your document and the fonts must be released under the GPL (which is different from saying that it automatically is released under the GPL), but in any case the document itself need not be released under the GPL. From the GPL:

    These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it.
    Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program.
    In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License.

    Finally, all this needs to be combined with the fact that fonts are probably not copyrightable in the first place, at least not in the United States.

  9. Nonsense by cfulmer · · Score: 4, Informative

    I am not a lawyer. Go see one if you need advice.

    By my reading, there are two cases in which the GPL requires you to allow others to reproduce your work.

    1. If you "modify your copy or copies of the Program or any portion of it ... and copy and distribute such modifications ..." (Paragraph 2).

    Even if you assume that the font is a "Program," you are not modifying your copy of the font by using it.

    2. "You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form ... provided that you also do one of the following...."

    Fonts are not in either object code or executable form, so no problem here.

    3. "Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license form the original licensor to copy, distribute or modify the Program...."

    But, that's not a problem -- they get your document and they get a right to modify the font from the original licensor.

    Incidently, how many GPL'd fonts are distributed with the font equivalent of "Source Code" -- the data file used by whatever font program you used?

    One reason that we have so many competing Open Source Licenses is that the GPL is not exactly clear in a lot of areas. For example, section 2 says "You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program," and a "work based on the program" is defined to be "the program or any derivative work under copyright law." But, does that mean that section 2 applies to all derivative works or only to modificiations of the original program? I'm guessing the intent was that it should apply to all derivative works, but it actually reads like it only applies to modifications. Not all derivative works are modifications.

    There's a rule of construction in contract cases that says that you "construe the contract against the drafter." In the case of fonts, that probably means that writing a document using a font is not covered by the GPL.

  10. Re:Presensation by Anonymous Coward · · Score: 5, Informative

    Do people around here completely fail to READ what is written? From that FAQ:

    A typeface is a set of letters, numbers, or other symbolic characters, whose forms are related by repeating design elements consistently applied in a notational system and are intended to be embodied in articles whose intrinsic utilitarian function is for use in composing text or other cognizable combinations of characters.

    A font is the computer file or program that is used to represent or create the typeface.


    The FONT is copyrightable. It's what you called an 'electronic typeface file' which is redefining a term contrary to how the FAQ and original poster used it. the FONT and FONT FILE are the same thing and are the entire file used to represent or create a TYPEFACE. a TYPEFACE is by definition in the FAQ, the shape of the lettering ONLY.

    You can copyright a FONT. as the faq and original poster says, You can't copyright TYPEFACES, end of story.