Hello Olivier, hello all, On 22 February 2018 at 17:54 Olivier Mascia <o...@integral.be> wrote: > > > Dear all, > > How about watermarking pages? > Either with text, images or PDF pages? > I'm no expert for "watermarking", especially about securing/hardening against removal of such a watermark (e.g. e-books marked with customer data).
> I mean, take two existing PDF files A and B. > Update file A, placing content of page B.2 so it displays underneath > (or over) page A.1 existing content? > > Or given PDF file A, add text or images underneath (or over) page A.2? Ah, that is meant: If there's any problem doing that with PoDoFo, it's the latter's bug ;-). Just append the page's stream to the watermark's (what comes later draws over the preceding content). In case graphics settings could be changed in a page without reset: call PdfPainter::Save() first (on an empty page, which has to be set first), then PdfPainter::GetCanvas(), append the background's content's stream PdfPage::GetContents()->GetStream() to the former's return object, call PdfPainter::Restore(), then append the foreground likewise, call PdfPainter::FinishPage() (is automatically called by SetPage()) and you should be set (sorry, I haven't tested this yet with a current revision of PoDoFo, so please report any oddities you see). > > Is there any known piece of code (even pseudo code of course or just some > explanations) which would give pointers on how to achieve this using PoDoFo > or building it around PoDoFo? Please see above for an explanation/recipe. I hope this helps you. > > Thanks, > -- > Best Regards, Meilleures salutations, Met vriendelijke groeten, > Olivier Mascia > Best regards, mabri ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Podofo-users mailing list Podofo-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/podofo-users
