Hi,
if you are using Overlay.java please use OverlayPDF.java instead. Overlay.java
will be removed in the next major release.
To add some highlight rectangle handling it yourself you can use
PDDocument document = PDDocument.loadNonSeq( ... );
PDPage page = (PDPage) document.getDocumentCatalog().getAllPages().get(0);
/* Set up the graphic state */
// Define a new extended graphic state
PDExtendedGraphicsState extendedGraphicsState = new
PDExtendedGraphicsState();
// Set the transparency/opacity
extendedGraphicsState.setNonStrokingAlphaConstant(0.5f);
// Get the page resources.
PDResources resources = page.findResources();
// Get the defined graphic states.
Map<String, PDExtendedGraphicsState> graphicsStateDictionary =
resources.getGraphicsStates();
if (graphicsStateDictionary == null) {
graphicsStateDictionary = new HashMap<String,
PDExtendedGraphicsState>();
}
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);
contentStream.appendRawCommands("/TransparentState gs\n");
contentStream.setNonStrokingColor(Color.yellow);
// put in the coordinates for the rectangle found by the text extraction
contentStream.fillRect(100f,100f,100f,100f);
contentStream.close();
document.save( ... );
null checks, error handling etc. is omitted so the code is clearer.
For the annotations - how did you print the PDF? If you print it using e.g.
Adobe Reader printing the annotations is optional and has to be activated in
the printer dialog, otherwise they will be omitted.
BR
Maruan Sahyoun
Am 26.02.2014 um 23:48 schrieb Nikos Chantziaras <[email protected]>:
> That doesn't work, it turns out. Only the test PDFs were working. Trying to
> overlay "real" PDFs result in an error that Cos Arrays are not supported.
>
> So I then tried to use PDF annotations instead. This seemed to work fine.
> However, when someone tried to print the PDF, annotated text was not
> highlighted at all, even though it looks just fine on screen!
>
> So I'm out of ideas. It would appear that PDFBox is indeed incapable of
> highlighting text?
>
>
> On 17/02/14 17:18, Nikos Chantziaras wrote:
>> I've come up with a good way to insert color-filled rectangles through
>> the use of Overlay (so that they are rendered behind the text instead of
>> the front of it.)
>>
>> On 17/02/14 13:52, Maruan Sahyoun wrote:
>>> [...]
>>> If you would like to make the highlight part of the PDF you could
>>> create an annotation or draw a rectangle behind the text.
>>>
>>> Steps would be a. find the text b. get the coordinates of the text c.
>>> create an annotation or a rectangle around the coordinates
>>>
>>> You could also use the information in the highlight xml file to get
>>> the coordinates for the annotation/rectangle
>>>
>>> Am 17.02.2014 um 12:09 schrieb Nikos Chantziaras <[email protected]>:
>>>
>>>> It is not apparent how to save a PDF after I highlight some text in
>>>> it. For example:
>>>>
>>>> PDDocument doc = PDDocument.load("source.pdf"); PDFHighlighter hl =
>>>> new PDFHighlighter(); java.io.FileWriter xml = new
>>>> java.io.FileWriter("tmp.xml"); hl.generateXMLHighlight(doc, "450",
>>>> xml);
>>>>
>>>> How do I now save source.pdf (or a copy of it, if overwriting is
>>>> not possible) with the text highlighted?
>
