That's still a great start! And not a problem for OutputIntents until PDFBox starts doing compliant rendering of PDF/X or PDF/A, as "general purpose" PDF 2.0 does not mandate their support.
Thanks. > -----Original Message----- > From: Tilman Hausherr <thaush...@t-online.de> > Sent: Friday, November 10, 2023 5:17 AM > To: users@pdfbox.apache.org > Subject: Re: PDF 2.0, PDF/A-4 support > > Hi Peter, > > That's a lot... I'll create issues for some of these topics. The > negative dash phase thing has been fixed in the latest release : > https://issues.apache.org/jira/browse/PDFBOX-5636 > > Things that might be possible: > - UTF-8 > - Encryption > - Colorburn / Colordodge > > The fill & stroke problem is a problem with Java itself, because it > doesn't offer a combined fill & stroke. > > OutputIntents - we don't support these at all, so we'd have to start > supporting it. > > Tilman > > On 09.11.2023 02:28, Peter Wyatt wrote: > > I would think supporting the following PDF 2.0 features are highly > > relevant, given that other implementations > are already generating PDF 2.0 files today (see > https://pdfa.org/supporting-pdf20/): > > > > * UTF-8 support for user-visible strings, such as bookmarks (outlines), OCG > > layer names, certain annot fields, > etc. Missing support results in the ugly display or extraction of "mojibake" > for the UTF-8 BoMs. See > https://pdfa.org/understanding-utf-8-in-pdf-2-0. Note that this does NOT > impact content streams or text > extraction (unless you also combine with Logical Structure)! > > > > * the latest encryption (AES-GCM 256 bit), dig-sig, hash algorithms, and > > Unicode password support which is FAR > more up-to-date and secure than all legacy crypto. 3rd parties are already > generating such files which will > otherwise be unreadable/unprocessable by PDFBox. I don't know what crypto > library PDFBox uses, but all the new > algorithms are standard modern crypto algorithms. Unicode passwords also > follow the latest ICU (not knowing what > you use internally) but be careful so legacy files continue to work. > > > > * if high-quality semantic content extraction is important, then updating > > for PDF 2.0 standard structure types, > although this is likely to be a larger dev effort. > > > > > > If you want to address rendering issues, then: > > > > * PLEASE PLEASE PLEASE fix your incorrect rendering of "fill and stroke" in > > the presence of transparency! See > https://github.com/pdf-association/pdf-differences/blob/main/Atomic-Fill%2BStroke/README.md > > > > * making sure you using the correct blend mode formulae for ColorBurn and > > ColorDodge (from 2009 - I have not > checked your implementation): > https://github.com/pdf-association/pdf-differences/tree/main/ColorBurn-ColorDodge > > > > * ensuring negative dash phase is correct (previously unstated as what to > > do) - see https://github.com/pdf- > association/pdf-differences/tree/main/Negative-DashPhase > > > > * page-based OutputIntents. Already in use, especially in print-centric > > workflows where page merging and > imposition across PDFs is now far easier to do. Implementation update to > select a page-based OutputIntent ahead > of the document-level OutputIntent should be relatively easy. > > > > * the use of transparency and blend mode of an annotations appearance > > stream when rendered onto a page (not > _within_ the annot). > > > > > > Obviously there are other PDF 2.0 features but these would be my go-to > > short list for starting to address the > most obvious visible differences. > > See also https://pdfa.org/how-to-get-started-with-pdf-2-0/ since reporting > > a simple PDF version is unlikely to > withstand the test of time... > > > > > > Of course I am also biased 😊 - and I'm not a Java expert! > > > > > >> -----Original Message----- > >> From: Tilman Hausherr <thaush...@t-online.de> > >> Sent: Thursday, November 9, 2023 3:35 AM > >> To: users@pdfbox.apache.org > >> Subject: Re: PDF 2.0, PDF/A-4 support > >> > >> We don't have roadmaps. If you need a PDF 2.0 feature, tell us which one > >> and why. PDF/A-4 isn't a topic because preflight isn't developed > >> further. Use VeraPDF instead. You can create PDF/A-4 files like you can > >> create PDF/A-1b files. > >> > >> Tilman > >> > >> On 08.11.2023 00:15, Gili Tzabari wrote: > >>> Hi, > >>> > >>> I noticed that PDFBox 3.0 was recently released, but I can't tell what > >>> the status/roadmap is for PDF 2.0 and PDF/A-4 support. > >>> > >>> Can someone in the know please let me know where we stand? > >>> > >>> Thanks, > >>> Gili > >>> > >>> > >>> --------------------------------------------------------------------- > >>> To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org > >>> For additional commands, e-mail: users-h...@pdfbox.apache.org > >>> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org > >> For additional commands, e-mail: users-h...@pdfbox.apache.org > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org > > For additional commands, e-mail: users-h...@pdfbox.apache.org > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org > For additional commands, e-mail: users-h...@pdfbox.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@pdfbox.apache.org For additional commands, e-mail: users-h...@pdfbox.apache.org
