pdfbox-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Maruan Sahyoun <sahy...@fileaffairs.de>
Subject Re: Add a transparent rectangle to the existed PDF with the co-ordinates.
Date Wed, 20 Mar 2013 09:07:36 GMT
Hi Eric,

take a look at http://svn.apache.org/viewvc/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/OverlayPDF.java?view=markup
how to work with Over/Under content.

Kind regards

Maruan Sahyoun


Am 20.03.2013 um 09:54 schrieb Eric Chow <eric138@gmail.com>:

> 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 <sahyoun@fileaffairs.de>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 <eric138@gmail.com>:
>> 
>>> 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 <sahyoun@fileaffairs.de
>>> 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 <eric138@gmail.com>:
>>>> 
>>>>> 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
>>>> 
>>>> 
>> 
>> 


Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message