A Divendres, 23 de setembre de 2011, Leonard Rosenthol vàreu escriure: > They may, you are right. > > If you wanted to maintain a list of known "restriction free" fonts and > only extract those - that would probably be OK.
No way, unless is there something in the the pdf/font file to indicate it has a restriction, i do not see why we should assume it has one. Albert > > Leonard > > On 9/22/11 9:17 PM, "Josh Richardson" <[email protected]> wrote: > >The fonts that are embedded in a PDF may come from any source, and be > >completely restriction-free. It's really up to the user of the software > >to decide. Note that there are many many many other open source programs > >that extract fonts from PDFs. > > > >--josh > > > >On 9/22/11 6:04 PM, "Leonard Rosenthol" <[email protected]> wrote: > >>Boy, your lawyer needs to read up on IP law :). > >> > >>Since you do NOT have a license for the font data contained in the PDF, > >>your software has NO RIGHTS to use that information for anything other > >>than rendering the glyphs in the PDF. You certainly have NO rights to > >>convert the format - in fact, doing so is a clear and distinct violation > >>of the font licenses. > >> > >>As such, if your patches to pdf2html extract the font data for use in > >>the > >>HTML - I STRONGLY recommend that the code NOT be accepted into the > >>master > >>repository. > >> > >>Leonard > >> > >>On 9/22/11 6:40 PM, "Josh Richardson" <[email protected]> wrote: > >>>I'm not a lawyer, but I did check with one. I don't think software > >>>can > >>>violate your IP/licenses, at least as long as that software doesn't > >>>contain unauthorized copyrighted material -- which pdftohtml does not > >>>AFAIK -- I certainly didn't add any to it. > >>> > >>>Best, --josh > >>> > >>>On 9/22/11 3:08 PM, "Leonard Rosenthol" <[email protected]> wrote: > >>>>I can't recall what you said about this in the past, but since I was > >>>>just > >>>>dealing with it today. > >>>> > >>>>What do you do about embedded fonts? > >>>> > >>>>As my company (Adobe) sells/creates fonts, I want to make sure that > >>>>pdftohtml won't be violating our IP/licenses. > >>>> > >>>>Thanks in advance, > >>>>Leonard > >>>> > >>>>On 9/22/11 5:51 PM, "Josh Richardson" <[email protected]> wrote: > >>>>>On 9/22/11 12:20 PM, "Jonathan Kew" <[email protected]> wrote: > >>>>>>More generally, it is not possible to recreate useful XHTML (or > >>>>>>similar) > >>>>>>documents from arbitrary PDF files with anything like 100% > >>>>>>reliability, > >>>>>>because many PDF files do not contain adequate information to > >>>>>>accurately > >>>>>>map the rendered glyphs back to correct Unicode text, or to > >>>>>>reliably > >>>>>>reconstruct the proper flow of text. Constructs such as > >>>>>>ActualText > >>>>>>may > >>>>>>help, but are often lacking from real-world PDF documents. > >>>>> > >>>>>W.r.t. rendering glyphs, we get around the problem of missing > >>>>>unicode > >>>>>mappings by taking any glyph without a unicode mapping and > >>>>>assigning > >>>>>it > >>>>>an > >>>>>offset in the private space of Unicode. This produces the correct > >>>>>visual > >>>>>result in the XHTML, but not a full semantic representation. If > >>>>>someone's > >>>>>interested, they could get the semantics right too by > >>>>>pattern-matching > >>>>>the > >>>>>glyph against an appropriate Unicode font. > >>>>> > >>>>>W.r.t. the flow of text, there have been other threads on this > >>>>>topic, > >>>>>but > >>>>>pdftohtml does make some attempt, and I believe it's possible to > >>>>>do > >>>>>this > >>>>>to a high degree of accuracy, maybe >99% -- that said, noone has > >>>>>done > >>>>>it > >>>>>yet, so either it's harder than I think, or no-one has cared > >>>>>enough to > >>>>>really try (and I still fall into that camp.) > >>>>> > >>>>>Best, --josh > >>>>> > >>>>>_______________________________________________ > >>>>>poppler mailing list > >>>>>[email protected] > >>>>>http://lists.freedesktop.org/mailman/listinfo/poppler > >>> > >>>_______________________________________________ > >>>poppler mailing list > >>>[email protected] > >>>http://lists.freedesktop.org/mailman/listinfo/poppler > > _______________________________________________ > poppler mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/poppler _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
