On Monday, December 16, 2013 10:19:08 PM Albert Astals Cid wrote: > El Dilluns, 16 de desembre de 2013, a les 17:16:20, Edward Rosten va escriure: > > Hi All, > > Hi > > > I'm having a problem with annotations and I'm not sure if it's a bug. > > > > I've attached 3 files. The original is hello.pdf, a very plain PDF > > made with PDFlatex. > > > > The next file hello-okular.pdf has been annotated with okular. The > > problem with this file is that annotations don't appear in all > > readers. They don't appear in xpdf and (worse) don't appear in the PDF > > reader built into gmail, or the one built into Firefox. They do appear > > in evince, okular and Acrobat Reader. > > > > For the final file, I loaded hello-okular.pdf into Acrobat Reader and > > saved as hello-okular-adobereader.pdf without making any explicit > > modifications. Now the annotations appear in all readers. > > > > It appears that the annotations only semi-work in other PDF readers at > > the moment. I also have a vague memory which I can't verify that > > okular annotations have previously been readable in xpdf (and > > presumably the others, though I don't remember). > > > > Is this a bug? > > Looks like it to me. What could be otherwise?
Sounds like xpdf, gmail and Firefox don't know how to handle annotations without an appearance stream (Poppler -the library we use to handle PDFs- doesn't store the appearance stream within the PDF file, whereas Acrobat does). Basically we're saying "you have to draw a circle annotation" but we're not telling how (ie "draw a curve using these control points"). If they used to work, then I'm wrong and it is a bug. According to the specs the appearance stream is optional, therefore I'm tempted to say this is not our/Poppler's bug. OTOH, given that so many readers show this issue, we may want to change Poppler's behavior. There is a reason why I haven't done this yet: we would need to embed a font in case of text notes, but I don't know enough about fonts to do that and I guess there are also licensing issues to keep in mind. Albert, what do you think? Fabio > Cheers, > Albert > > > Regards > > > > -Ed > > _______________________________________________ > Okular-devel mailing list > Okular-devel@kde.org > https://mail.kde.org/mailman/listinfo/okular-devel -- Fabio _______________________________________________ Okular-devel mailing list Okular-devel@kde.org https://mail.kde.org/mailman/listinfo/okular-devel
