Just to clarify this - technically ANYTHING in PDF can have transparency operations (blending, opacity, etc.) applied to it. I don't recall if iText exposes all that functionality, but it IS possible....
However, as Paulo said in a seperate message - if your PDF has a white background, then that's what you've got..unless you are going to try to modify the PDF by removing that background... Leonard On Jul 18, 2007, at 6:21 AM, Paulo Soares wrote: > Transparency can only be applied to real raster images. > > Paulo > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On >> Behalf Of Ziegler Stefan >> Sent: Wednesday, July 18, 2007 1:00 PM >> To: itext-questions >> Subject: [iText-questions] problems with transparency >> >> Hi >> I've got some problems with setting images transparent. I >> have a png-file and a pdf-file. The png is the base layer and >> the pdf overlays the png. The white parts of the pdf should >> be transparent not white anymore. Here's the code: >> >> URL PdfUrl = new URL("........"); >> PdfReader reader = new PdfReader(PdfUrl); >> >> Document document = new Document(new Rectangle(width,height)); >> >> PdfWriter writer = PdfWriter.getInstance(document, new >> FileOutputStream("out.pdf")); >> writer.setPdfVersion(PdfWriter.VERSION_1_2); >> document.open(); >> PdfContentByte cb = writer.getDirectContent(); >> document.newPage(); >> PdfImportedPage tp = writer.getImportedPage(reader, 1); >> >> Image img = Image.getInstance(tp); >> img.scalePercent(percent); >> >> //nothing happens here >> //int[] transp = {255, 255, 255, 255, 255, 255}; >> //img.setTransparency(transp); >> >> URL rasterUrl = new URL("......."); >> Image imgRaster = Image.getInstance(rasterUrl); >> >> imgRaster.setAbsolutePosition(marginXp+marginTitelp, marginYp); >> cb.addImage(imgRaster); >> img.setAbsolutePosition(marginXp+marginTitelp, marginYp); >> cb.addImage(img); >> >> All I see is the imported pdf-file. I tried the >> setTransperancy method, but nothing happened. >> Thanks for your help. >> >> Regards >> Stefan >> >> Mit freundlichem Gruss >> Stefan Ziegler >> Leiter Aufsicht >> >> Kanton Solothurn >> Bau- und Justizdepartement >> Amt für Geoinformation >> Rötistrasse 4 >> 4501 Solothurn >> Telefon 032 627 75 96 >> Telefax 032 627 75 98 >> [EMAIL PROTECTED] >> http://www.so.ch >> > > > Aviso Legal: > Esta mensagem é destinada exclusivamente ao destinatário. Pode > conter informação confidencial ou legalmente protegida. A > incorrecta transmissão desta mensagem não significa a perca de > confidencialidade. Se esta mensagem for recebida por engano, por > favor envie-a de volta para o remetente e apague-a do seu sistema > de imediato. É proibido a qualquer pessoa que não o destinatário de > usar, revelar ou distribuir qualquer parte desta mensagem. > > Disclaimer: > This message is destined exclusively to the intended receiver. It > may contain confidential or legally protected information. The > incorrect transmission of this message does not mean the loss of > its confidentiality. If this message is received by mistake, please > send it back to the sender and delete it from your system > immediately. It is forbidden to any person who is not the intended > receiver to use, distribute or copy any part of this message. > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > iText-questions mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/itext-questions > Buy the iText book: http://itext.ugent.be/itext-in-action/ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ iText-questions mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://itext.ugent.be/itext-in-action/
