Fw: Re: Fwd: Re: Xounal PDF Quality

Sun Feb 7 18:55:39 UTC 2016

Hello,

I am passing you this email exchange.
You may consider to update xournal at the end.

Thank.

===========================================================================
 Patrick DUPRÉ                                 | | email: pdupre at gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale           | |
 Tel.  (33)-(0)3 28 23 76 12                   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann                 | | 59140 Dunkerque, France
===========================================================================

> Sent: Sunday, February 07, 2016 at 7:52 PM
> From: "Denis Auroux" <auroux at math.berkeley.edu>
> To: "Patrick Dupre" <pdupre at gmx.com>
> Subject: Re: Fwd: Re: Xounal PDF Quality
>
> Hi Patrick,
> 
> Glad to hear that "legacy PDF export" solves the issue for you.  The 
> official Fedora package is likely to be based on official 0.4.8 (hence, 
> a year old and not correcting all the bugs), though I don't know what 
> exactly they might or might not have fixed in the -4 package iteration. 
>   So you'd need to uninstall it and compile manually instead from 
> GIT/CVS if you really wanted to -- but it sounds like you don't need to...
> Best,
> Denis
> 
> 
> On 02/07/2016 10:49 AM, Patrick Dupre wrote:
> >>
> >> Hi Andreas + Patrick,
> >>
> >> Very strange and surprising. Two comments:
> >>
> >> 1. are you using the plain official 0.4.8 release, or a more recent
> >> version compiled from the GIT or CVS repositories on sourceforge ?
> > xournal-0.4.8-3.fc22.x86_64
> >   The
> >> GIT/CVS version corrects a bug in PDF export that most visibly resulted
> >> in loss of quality of scanned images inside PDFs, but might also affect
> >> other aspects of PDFs as well. So: if you are using the 'normal' 0.4.8
> >> release, please try upgrading to the latest cvs/git version and see if
> >> it fixes the issue.
> > This is the version of the distribution
> > I do not think that the last update:
> > xournal-0.4.8-4.fc23.x86_64.rpm would be different.
> >
> >> 2. in 0.4.8 there are two methods of exporting PDFs, the new one is used
> >> by default and should be better (apart from the serious loss of image
> >> resolution bug that was fixed in GIT/CVS and perhaps also the issue you
> >> just reported?), but you can also try the older one by selecting Options
> >> -> Legacy PDF export.
> >> When selected, the exported PDF should be much more faithful to the
> >> original whenever possible (but export will fail with certain PDF
> >> files), so I imagine the problem you report will certainly go away.
> > Yes you are right
> >
> >>
> >> The default ("new") PDF export option loads the existing PDF using
> >> poppler/cairo -- same libraries used by evince and other PDF viewers --
> >> and prints it to a new PDF with the annotations on top. (The bug
> >> corrected in cvs/git was that we forgot to specify optimal print quality
> >> settings when doing this printing, which caused some quality loss in
> >> some cases). The old ('legacy') PDF export hacks into the existing PDF
> >> code and adds the annotations to the existing pages, without any
> >> modification or "re-distilling" of the existing PDF, so it is more
> >> faithful when it works, but it fails for various kinds of
> >> encrypted/compressed PDF files.)
> >>
> >> Denis
> >>
> >>
> >>
> >>
> >> On 02/07/2016 08:16 AM, Andreas Butti wrote:
> >>> Hi Denis
> >>>
> >>> Patrick Dupre wrote me a mail, there is a Bug in the PDF export in
> >>> Xournal. It seems there is a problem with the stroken width.
> >>>
> >>> Do you know this problem?
> >>> Do you may have a look at it?
> >>>
> >>> Thank you.
> >>>
> >>>
> >>> Andreas
> >>>
> >>> -------- Weitergeleitete Nachricht --------
> >>> Betreff: 	Re: Xounal PDF Quality
> >>> Datum: 	Sat, 6 Feb 2016 21:32:04 +0100
> >>> Von: 	Patrick Dupre <pdupre at gmx.com>
> >>> An: 	andreasb123 at users.sf.net
> >>>
> >>>
> >>>
> >>> Hello,
> >>> I am attaching 2 files demonstrating the issue.
> >>>
> >>> ===========================================================================
> >>> Patrick DUPRÉ | | email: pdupre at gmx.com
> >>> Laboratoire de Physico-Chimie de l'Atmosphère | |
> >>> Université du Littoral-Côte d'Opale | |
> >>> Tel. (33)-(0)3 28 23 76 12 | | Fax: 03 28 65 82 44
> >>> 189A, avenue Maurice Schumann | | 59140 Dunkerque, France
> >>> ===========================================================================
> >>> *Sent:* Saturday, February 06, 2016 at 8:34 PM
> >>> *From:* andreasb123 at users.sf.net
> >>> *To:* patdupre at users.sf.net
> >>> *Subject:* Xounal PDF Quality
> >>>
> >>> Hi
> >>>
> >>> First: I couldn’t answer to your mail, because SF was down...
> >>>
> >>> Xournal shouldn't change the Image quality...
> >>>
> >>> I cannot help you now, you may write to the mailing list:
> >>> https://sourceforge.net/p/xournal/mailman/xournal-devel/
> >>>
> >>> You may also would like to try out Xournal++, it's a rewrite of Xournal,
> >>> it can open your .xoj files.
> >>> https://github.com/xournalpp/xournalpp
> >>>
> >>> But I cannot guaranty that this will work better for your case.
> >>>
> >>> Only one idea: If you print your existing PDf to a PDF printer, it may
> >>> fix the problem. (If the PDF was faulty, you never know...)
> >>>
> >>> ------------------------------------------------------------------------
> >>>
> >>> This message was sent to you via the SourceForge web mail form.
> >>> You may reply to this message directly, or at
> >>> <http://sourceforge.net/u/andreasb123/profile/send_message>http://sourceforge.net/u/andreasb123/profile/send_message
> >>>
> >>>
> >>>
> >>
> >> --
> >> Denis Auroux
> >> University of California, Berkeley      auroux at math.berkeley.edu
> >> Department of Mathematics               Tel: 510-642-4367
> >> 817 Evans Hall # 3840                   Fax: 510-642-8204
> >> Berkeley, CA 94720-3840
> >>
> 
> -- 
> Denis Auroux
> UC Berkeley, Department of Mathematics
> 817 Evans Hall, Berkeley CA 94720-3840, USA
> auroux at math.berkeley.edu
>