Dear Maruan, Thank you very much. It works fine. I tried iText before and it can draw a rectangle by using UnderContent!
Is it possible to do this in PDFBox? Best regards, Eric On Wed, Mar 20, 2013 at 3:34 PM, Maruan Sahyoun <[email protected]>wrote: > Hi Eric, > > a slightly enhanced sample with transparency. > > > // For simplicity the code provided doesn't have any null > checks or > // exception handling !! > > PDDocument document = PDDocument.load(...); > PDPage page = (PDPage) > document.getDocumentCatalog().getAllPages().get(0); > > // The transparency, opacity of graphic objects can't be set > directly on the drawing commands. > // Instead we need to define a graphic state which will become > part of the > // resources. That state can be called later prior to doing > the graphic operations. > // That's part of the ISO/PDF specification [ISO-32000: 8.4.1] > > /* --------- Set up the graphic state -------------- */ > > // Define a new extended graphic state > PDExtendedGraphicsState extendedGraphicsState = new > PDExtendedGraphicsState(); > // Set the transparency/opacity > extendedGraphicsState.setNonStrokingAlphaConstant(0.8f); > // Get the page resources. > PDResources resources = page.findResources(); > // Get the defined graphic states. > Map graphicsStateDictionary = resources.getGraphicsStates(); > // Add the new state definition. The name is the reference we > need later on. > graphicsStateDictionary.put("TransparentState", > extendedGraphicsState); > resources.setGraphicsStates(graphicsStateDictionary); > > /* --------- End of setup -------------------------- */ > > // Now we will be able to call the state definition before > doing the drawing > PDPageContentStream contentStream = new > PDPageContentStream(document, page,true,true); > // Call the graphic state using the name defined > contentStream.appendRawCommands("/TransparentState gs\n"); > contentStream.setNonStrokingColor(Color.yellow); > contentStream.fillRect(100, 100, 200, 200); > contentStream.close(); > document.save(...); > document.close(); > > > Kind regards > > Maruan Sahyoun > > Am 20.03.2013 um 02:53 schrieb Eric Chow <[email protected]>: > > > Hi Maruan, > > > > Thanks for your example. But I don't want to using annotation since it > can > > be deleted. > > > > I want to really highlight the text by giving the co-ordinate? Would you > > please to show me a simple example? > > > > Best regards, > > Eric > > > > > > > > > > On Tue, Mar 19, 2013 at 3:21 PM, Maruan Sahyoun <[email protected] > >wrote: > > > >> Hi Eric, > >> > >> I did something similar for one of our customers. I didn't use a > rectangle > >> but a highlight annotation. A sample for annotations can be found at [1] > >> > >> Kind regards > >> > >> Maruan Sahyoun > >> > >> > >> > http://svn.apache.org/repos/asf/pdfbox/branches/before-maven-layout/src/org/pdfbox/examples/pdmodel/Annotation.java > >> > >> Am 19.03.2013 um 03:42 schrieb Eric Chow <[email protected]>: > >> > >>> Hello, > >>> > >>> How can I add a transparent yellow rectangle to a specific co-ordinate > >>> (llx, lly, urx, ury) into an existed PDF? > >>> > >>> > >>> In fact, I want to highlight some text that I know the exact position > in > >>> the PDF. Would you please to teach me? > >>> > >>> > >>> Best regards, > >>> Eric > >> > >> > >
