Julien, Doesn't this code[1] create a new image object which is in no way attached to the PDF? Modifying "(COSStream) obj.getObject()" seems like it'd do what you intend. I'm not familiar with PDXObject.createXObject(), but it seems like that'd be creating a copy of the data passed it (similar to a copy constructor). Obviously modifying a copy isn't going to affect the original.
I'm pretty sure that's your problem, but I've never done anything with streams nor images in PDFs, so I'm afraid I don't know the way to it's supposed to be done. Another thing which might be important: some PDF programs don't write out anything in the xref table. This doesn't follow the spec, but Adobe Reader opens them fine either way, so many people don't realize they're out of spec (and thus expect your code to process them the same as a proper PDF). [1] PDXObjectImage image = (PDXObjectImage) PDXObject.createXObject((COSStream) obj.getObject() ); ---- Thanks, Adam From: Julien Plée <[email protected]> To: [email protected] Date: 08/25/2010 15:00 Subject: Replacing images contents Hello, I have to put a watermark stamp on images stored in PDF files and I'm having hard times trying to embed images back into the PDF. I'm using the XrefTable to filter images. For embedding, I'm trying to replace the stream of the original object but with no luck, the saved PDF always looks the same. Here is my method code focused on the PDXObjectImage : /** * Replaces a PDF image content with content from an image file on file * system identified by the object id. * * (this.doc : PDDocument) * @param obj * @throws IOException */ protected void embedImageBack(COSObject obj) throws IOException { String path = "img/"; PDXObjectImage image = (PDXObjectImage) PDXObject.createXObject( (COSStream) obj.getObject() ); File inputFile = new File( path+obj.getObjectNumber()+"."+image.getSuffix() ); PDXObjectImage newImage = null; if (image.getSuffix().equals("jpg")) newImage = new PDJpeg( this.doc, new FileInputStream(inputFile) ); else newImage = new PDCcitt( this.doc, (RandomAccess) new RandomAccessFile( inputFile, "r" ) ); image.getCOSStream().replaceWithStream(newImage.getCOSStream()); this.shouldSaveDoc = true; } After all images have been processed, I save the document in a new file, but except that the file size changes, nothing else visible happens. Thanks for any help. Julien PLÉE ? Click here to submit conditions This email and any content within or attached hereto from Sun West Mortgage Company, Inc. is confidential and/or legally privileged. The information is intended only for the use of the individual or entity named on this email. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or the taking of any action in reliance on the contents of this email information is strictly prohibited, and that the documents should be returned to this office immediately by email. Receipt by anyone other than the intended recipient is not a waiver of any privilege. Please do not include your social security number, account number, or any other personal or financial information in the content of the email. Should you have any questions, please call (800) 453 7884.
