> Le 22 févr. 2018 à 21:47, Matthew Brincke <ma...@mailbox.org> a écrit : > >> 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).
No need for such securing for what I want to do. My use of the word "watermarking" was misleading. :) >> 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. The whole picture seems perfectly clear!! Many many thanks. I'll experiment on sat/sun. I'll share any oddities I might find, hoping it won't be mistakes on my side. -- Best Regards, Meilleures salutations, Met vriendelijke groeten, Olivier Mascia ------------------------------------------------------------------------------ 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
