Hi, Am Freitag, 26. September 2008 schrieb Dominik Seichter: > Hi, > > Thanks for the testcases. > > I fixed the bug/crash inside of the predictor. The fix is in SVN, could you > please check if this fixes your issues? > > I can reproduce your problems in msft080305vxpm1.pdf and will come back to > you as soon as I know what causes this problems. > > Regarding your issue with names. I can reproduce this two. Will come back > as soon as I know the fix. I just commited a fix for this bug.
regards,
Dom
>
> best regards,
> Dom
>
> Am Freitag, 26. September 2008 schrieb Shunli (Derek) Zheng:
> > See my comments. Thanks!
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> > Sent: Friday, September 26, 2008 6:06 PM
> > To: [email protected]
> > Cc: Shunli (Derek) Zheng
> > Subject: Re: [Podofo-users] PoDoFo bug reports
> >
> > Hi,
> >
> > Thanks for reporting these bugs.
> >
> > Am Freitag, 26. September 2008 schrieb Shunli (Derek) Zheng:
> > > Hi PoDoFo supporters,
> > >
> > > Thanks for all your contribution to the PoDoFo project. It's a very
> > > good and useful open source project.
> > >
> > > Our company has a project that should add custom attributes to PDF
> > > file's Info dictionary. And we found some critical bugs of PoDoFo when
> > >
> > > doing test on it.
> > > 1. There is a crash bug in function PdfPredictorDecoder::Decode() of
> > > file PdfFiltersPrivate.cpp. You can test with pdf files that are
> > > converted from .bmp or .jpg by Adobe Acrobat.
> > > if( m_nCurRowIndex > m_nRows )
> > > {
> > > m_nCurRowIndex = 0;
> > > m_nCurPredictor = m_nPredictor >= 10 ? *pBuffer + 10 :
> > > *pBuffer;
> > > }
> > > else
> > > {
> > > ...
> > > case 12: // png up
> > > m_pPrev[m_nCurRowIndex] += *pBuffer; // Here
> > > m_nCurRowIndex may equal to m_nRows, and beyond the array boundary.
> > > pStream->Write( &m_pPrev[m_nCurRowIndex], 1 );
> > > ...
> > > }
> >
> > Could you send me an example file for this problem? I think this bug
> > could be the solution to a bug David Roach is encountering. I will try
> > to fix it as soon as I can reproduce it.
> >
> > [Derek] Attached(bmp.pdf)
> >
> > > 2. PoDoFo will failed to parse pdf file if there are some syntax error
> > >
> > > in any dictionay.
> > > For example, for the following data, there is string in ( ), and
> > > the string contains two '('. PoDoFo will not parse the string
> > > correctly until EOF of the file.
> > > There are no bad syntax tolerance codes in the library. I think
> > > the bugs should be fixed.
> > > "... << ... /Title (....(..(hello world....) >> endobj ... "
> >
> > Well, you are right. PoDoFo currently accepts only valid PDF files. Only
> > balanced brackets are allowed to be not escaped in PDF, so your file is
> > broken.
> >
> > I currently have no time to add a fault-tollerant parser to PoDoFo, but
> > I will of course accept code contributions. I think so that the fault
> > tollerant parser should be optional. So that PoDoFo has to parsers (or a
> > property on
> > PdfParser) to specify that either only valid PDFs are accepted or that
> > PoDoFo should be more fault tollerant.
> >
> > [Derek] I'm sorry to say that the pdf file is created by PoDoFo file. We
> > add some custom attributes in msft080305vxpm1.pdf, and then new
> > generated pdf file will contain these bad syntax data.
> >
> > > 3. If I open a pdf file (converted from .vsd file type) with PoDoFo,
> > > and add some custom attributes into Info dictionary, and write the
> > > whole back to a new pdf file.
> > > Then the new generated file will generate many new dictionaries,
> > > such as below data. And later if I add new custom attributes to the
> > > new generated pdf file,
> > > PoDoFo will parse the below data failed with "Invalid data type"
> > > error message. (# is not a delimiter)
> > > "100 0 obj << /C /# # # # # # # # ... /K ... >> endobj"
> >
> > Quoting from the PDF Reference section 3.2.4 Name Objects:
> > "The name may include any regular characters, but not delimiter or
> > white-space characters (see Section 3.1, "Lexical Conventions")."
> >
> > So I think "/# # # #" is no legal name because of the whitespaces. So
> > how do these get in their? Does PoDoFo write them? Do we have an
> > encoding problem in PdfName?
> >
> > [Derek] I'm sorry to say that the pdf file is created by PoDoFo file. We
> > add some custom attributes in encryption_vsd.pdf, and then new generated
> > pdf file will contain these bad syntax data. White-space is actually
> > 0x00 data.
> >
> > > 4. PoDoFo failed to parse PDF Portfolio file type with error message:
> > > No trailer was found in the PDF file.
> >
> > I'll try to look into this.
> >
> > best regards,
> > Dom
> >
> > > We will be appreciate if your team can fix these bugs in the new
> > > verson of PoDoFo code. Thanks very much!
> > >
> > > Regards,
> > >
> > > -Derek
> > >
> > > - --------------------------------------------------------------------
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> >
> > > ======================================================================
> >
> > --
> > **********************************************************************
> > Dominik Seichter - [EMAIL PROTECTED]
> > KRename - http://www.krename.net - Powerful batch renamer for KDE
> > KBarcode - http://www.kbarcode.net - Barcode and label printing PoDoFo -
> > http://podofo.sf.net - PDF generation and parsing library SchafKopf -
> > http://schafkopf.berlios.de - Schafkopf, a card game, for KDE Alan -
> > http://alan.sf.net - A Turing Machine in Java
> > **********************************************************************
> >
> > - --------------------------------------------------------------------
> > STATEMENT OF CONFIDENTIALITY
> >
> > The information contained in this electronic message and any attachments
> > to this message are intended for the exclusive use of the addressee(s)
> > and may contain confidential or privileged information. No representation
> > is made on its accuracy or completeness of the information contained in
> > this electronic message. Certain assumptions may have been made in the
> > preparation of this material as at this date, and are subject to change
> > without notice. If you are not the intended recipient, you are hereby
> > notified that any dissemination, distribution or copying of this e-mail
> > and any attachment(s) is strictly prohibited. Please reply to the sender
> > at NextLabs Inc and destroy all copies of this message and any
> > attachments from your system.
> > ======================================================================
--
**********************************************************************
Dominik Seichter - [EMAIL PROTECTED]
KRename - http://www.krename.net - Powerful batch renamer for KDE
KBarcode - http://www.kbarcode.net - Barcode and label printing
PoDoFo - http://podofo.sf.net - PDF generation and parsing library
SchafKopf - http://schafkopf.berlios.de - Schafkopf, a card game, for KDE
Alan - http://alan.sf.net - A Turing Machine in Java
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