General Discussion - JBIG2 support will be in 7.22

Print Page | Close Window

JBIG2 support will be in 7.22

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: General Discussion
Forum Description: Discussion board for Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=1545
Printed Date: 29 Sep 24 at 4:41AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: JBIG2 support will be in 7.22

Posted By: Rowan
Subject: JBIG2 support will be in 7.22
Date Posted: 18 Aug 10 at 8:23AM

Hi Guys,

I just thought you might like to know that the next version of Quick PDF Library will include JBIG2 support. We'll have a public beta ready in the next 1-2 weeks, perhaps sooner, that you can try out.

If you have any PDF files that use JBIG2 images that you'd like me to add to our repository of test files, please email it to rowan.hanna@debenu.com.

Cheers,

- Rowan.

Replies:

Posted By: Ruturaaj
Date Posted: 23 Aug 10 at 4:13AM

This is really a good news and I'm looking forward to it. Just to add to that ... it will be really helpful if QP extends its support for HTML Tags. This will ease the process of making some typical PDF reports without much of PDF-styling effort.

Posted By: Rowan
Date Posted: 23 Aug 10 at 12:22PM

Glad to hear you're excited by this news. We'll also look at extending HTML tag support. Cheers!

Posted By: ryan.cole
Date Posted: 23 Aug 10 at 9:29PM

How do we know if a PDF uses JBIG2? I have a few PDFs that print out as blank documents when using QuickPDF and I had read that it may be because of JBIG2 support.

If this one does in fact contain JBIG2 then I will send it to you for testing.

Posted By: Rowan
Date Posted: 23 Aug 10 at 10:25PM

Open the PDF in notepad and then search for JBIG2. That usually does the trick (although, it won't pick up every instance of JBIG2 compression). But if you email the files to me I will check them out regardless of whether it's a JBIG2 related issue.

Cheers,

- Rowan.

Posted By: ryan.cole
Date Posted: 24 Aug 10 at 3:33PM

Ah, yup. The file does indeed contain JBIG2 compressed images. This would be my problem.

In that case, I look forward to the beta in a few weeks with JBIG2 support. :)

Posted By: Ingo
Date Posted: 24 Aug 10 at 7:58PM

Hi!

In a production environment you won't use Notepad to check for JBIG2 ;-)
Read the pdf-file-content into a stream/string and check the content with the Pos-syntax.
Here's a small sample (Delphi):

   var fs           : TFileStream;
       textkomplett : String;
// . . .
   Edit1.Text := 'c:\temp\sample.pdf';
   textkomplett := '';
   fs := TFileStream.Create(Edit1.Text,fmOpenRead+fmShareDenyWrite);
   try
     SetLength(textkomplett,fs.Size);
     fs.Read(PChar(textkomplett)^,fs.Size);
   finally
     fs.Free;
   end;
// . . .
   Result := Pos('JBIG2', textkomplett);

Cheers, Ingo

Posted By: Rowan
Date Posted: 24 Aug 10 at 8:36PM

Nice one Ingo -- much better than Notepad for a production environment. :-)