On Mon, 6 Jun 2011 00:17:56 +0100 Albert Astals Cid <[email protected]> wrote: >> If I only use the extracted font to display the original document in it's >> original form, and not to draw additional glyphs in any document, I >> believe I'll be in compliance with "fair use" and digital copyright rules >> for the font. > >Copyright law can be funny, but given we are not doing anything, it is the >user that does it, i don't think we should be worried at all.
A flag to indicate the permitted use of the font is included in an OpenType font: http://www.microsoft.com/typography/otspec/os2.htm#fst It indicates "can be or cannot be embedded", "can be or cannot be subsetted", "can be or cannot be modified", "bitmap or outline", but there is not indication whether the font can be extracted from the document which the font is embedded to. It is reasonable (at least when the spec was designed) because the flag is for the font, not for the document including the font. On the side of PDF, the permission to use document are classified in the encryption dictionary, the permissions relating with the embedded font handling would be "enable printing of the document" and "enable copying of text and graphics from the document". They can be defined in parallel, so if one (or both) of them is set to disable, disabling the font extraction would be safer. Anyway, it is my personal opinion. There might be some objection saying that putting such conditional is not intuitive and letting the users to check the permission and decide by themselves would be better. Regards, mpsuzuki _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
