Hello All, I am using PDFBox 2.0 dev snapshot to create a PDF with a watermark. My use case is to create PDF with watermark. I am using two kinds of watermarks: a) text string and b) image
When I am using the watermark text or image, the watermark in the generated PDF is not transparent but it is overlay on top of the PDF which makes the PDF text unreadable. I have uploaded sample output PDFs for your reference: Text string: http://www.filedropper.com/unicodewatermarktext Binary Image: http://www.filedropper.com/imagewatermarktest In 1.8.x, I used to implement the transparency of the watermark using the appendRawCommands("/TransparentState gs\n"); method which is deprecated in 2.0. In 2.0 I am implementing the transparency by creating PDExtendedGraphicsState object and setting it on PDResource. Below is the code snippet that I have: PDPageContentStream contentStream = new PDPageContentStream(pdf, page, true, true); PDResources resources = page.getResources(); if (resources != null) { PDExtendedGraphicsState extendedGraphicsState = new PDExtendedGraphicsState(); // Set the transparency/opacity extendedGraphicsState.setNonStrokingAlphaConstant(0.5f); PDExtendedGraphicsState graphicsState = resources.getExtGState(COSName.TRANSPARENCY); if (graphicsState == null) { graphicsState = extendedGraphicsState; } resources.add(graphicsState); } //deprecated method in 2.0 //contentStream.appendRawCommands("/TransparentState gs\n"); contentStream.setNonStrokingColor(Color.LIGHT_GRAY); contentStream.beginText(); contentStream.setFont(font, 75); AffineTransform at = new AffineTransform(2, 0, 0, 2, rect.getUpperRightX() / 4, rect.getUpperRightY() / 4); at.rotate(Math.toRadians(45)); Matrix matrix = new Matrix(at); contentStream.setTextMatrix(matrix); //contentStream.drawString( watermark ); contentStream.showText(watermark); contentStream.endText(); contentStream.close(); Any idea what I am missing? Any pointers how to make watermarks (text and image) transparent in 2.0 would be of great help! TIA, Rakshit
