Hi Tilman,

This is a small follow-up to the case below.
My team and I have had much success in using PDFBox 2 with XFDF support. Thanks 
for the fixes in late 2015.

Now recently we came across an issue we do not understand at all.

Again we do what the intention of the initial case was:

-        We have a PDF or PDF/A-1b document (source document)

-        We have a separate XFDF file for commenting which we “stamp” onto the 
original PDF / PDF/A1-ab document to create a new PDF document

-        This is done by a small Java class “XFDFStamper.java”

-        The XFDF sample is quite easy: basically a textbox with comment plus 
arrow.

-        This document shall be shown in the browsers

o    A) By using Internet Explorer with the Adobe Reade plugin

o    B) By using Chrome natively which in turn uses PDF.js

Strange thing now is:

-        IE with Adobe plugin renders the “stamped” PDF correctly

-        Chrome does not show the markups – it shows the text of the original 
document – plus: when you hover the document with the mouse, at the location 
where the markup is, a yellow comment box appears, like a big tooltip.

But: when you merge the 2 documents above via Adobe Acrobat, also Chrome 
displays the markup correctly. So there must be a difference between what Adobe 
Acrobat does and what PDFBox (or our code???) does.

I can provide the simple Java sample code plus the documents that show the 
difference plus source document and respective XFDF.

We assume there must be something which is still wrong inside PDFBox or (same 
probability ☺) we are doing wrong in our code. But we currently do not see the 
issue in our code.

Can I provide that info to you for a small debugging? Where can I upload this 
(small ZIP container)?

Herzliche Grüße / Best regards

Matthias Stoll
Project Manager PMP®
Application Business Services – Public Sector

T  +49 7031 450 5319
M +49 151 1475 2248
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From: Stoll, Matthias
Sent: Montag, 7. Dezember 2015 12:36
To: [email protected]
Subject: XFDF support and errors

Dear All,

I am currently investigating in using PDFBox (my tests used PFDBox 2.0RC2) for 
a small use case „stamping“ annotations from a given XFDF format (created by 
Qoppa’s jPDFEditor/jPDFNotes, www.qoppa.com<http://www.qoppa.com>) into a given 
PDF/A-1b file.

This works with a surprisingly minimal set of Java code line ☺ But: obviously 
not all XFDF elements are supported and/or there are bugs in reading XFDF up to 
now.

I just wanted to let you know about my experiences.


a)      Drawing lines painted by a pencil (element: “<gesture>”) do not show up 
at all after stamping them. Why?

Sample data to test with:
<ink name="C2B070EBB736993EA25F4545350AD2C3" style="solid" width="4.0" 
flags="print" date="D:20151207122033+01&apos;00&apos;" color="#00ff00" 
opacity="1.0" page="0" subject="Bleistift" 
rect="62.4562,1378.1637,167.5599,1402.8388" 
title="matstoll"><inklist><gesture>68.4562,1385.1637;69.7534,1385.1637;73.6451,1385.1637;77.5368,1385.1637;82.7258,1387.7582;89.212,1389.0554;93.1037,1390.3525;96.9954,1390.3525;100.8871,1391.6498;104.7788,1392.947;111.2649,1394.2443;116.4539,1394.2443;121.6428,1395.5415;125.5345,1395.5415;130.7235,1395.5415;134.6152,1395.5415;139.8041,1395.5415;143.6958,1395.5415;148.8848,1395.5415;151.4792,1395.5415;155.3709,1396.8387;156.6682,1396.8387;157.9654,1396.8387;160.5599,1396.8387</gesture></inklist><contents>Pencil
 line</contents></ink>

b)     Polygons (at least when created with jPDFNotes) throw an exception when 
reading:
Exception in thread "main" java.lang.NumberFormatException: For input string: 
"1318.7075;1054.6517"

             at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)

             at sun.misc.FloatingDecimal.parseFloat(Unknown Source)

             at java.lang.Float.parseFloat(Unknown Source)

             at 
org.apache.pdfbox.pdmodel.fdf.FDFAnnotationPolygon.initVertices(FDFAnnotationPolygon.java:101)

             at 
org.apache.pdfbox.pdmodel.fdf.FDFAnnotationPolygon.<init>(FDFAnnotationPolygon.java:78)

             at 
org.apache.pdfbox.pdmodel.fdf.FDFDictionary.<init>(FDFDictionary.java:196)

Sample data to test with:

<polygon name="534DC02A197B56578FFA6AE5F178100F" style="solid" width="9.0" 
flags="print" date="D:20151207121013+01&apos;00&apos;" color="#0000ff" 
opacity="1.0" page="0" subject="Polygon" 
rect="857.5527,1117.7167,1063.6517,1334.1936" title="matstoll">

<vertices>866.5527,1318.7075;1054.6517,1325.1936;1032.5987,1126.7167;876.9306,1179.9034;866.5527,1318.7075;</vertices>

</polygon>


c)      A cloudy polygon cannot be read either – I assume a general issue 
reading polygons.

Sample data to test with:

<polygon name="0276B0ECDCA680FDB0C0AE8377AE0FAA" style="cloudy" width="4.0" 
flags="print" date="D:20151207122247+01&apos;00&apos;" intensity="2" 
color="#ff5500" opacity="1.0" page="0" subject="Cloud/Wolke" 
rect="278.8037,1105.6361,563.5944,1216.9184" title="matstoll" 
IT="PolygonCloud"><vertices>310.0391,1147.4725;420.304,1205.8481;555.2164,1117.6361;342.4699,1117.6361;286.6888,1134.5002;310.0391,1147.4725;</vertices></polygon>

d)     A freetext (“<freetext>”) element will not show up correctly:

b1) Though “width=0.0” for the box, it PDFBox will render a box around the text

b2) Though font is set to “font: Courier 12pt; color:#000000” a wrong font will 
be rendered

b3) The color setting will be ignored: my tests setting a color of font and 
border to red showed up a textbox with black border and black text.

e)      A freetext element with legend options does not show up correctly:
e1) Colors are wrong/ignored
e2) Font size not correct
e3) Legend arrow not drawn

Sample data to test with:
<freetext name="95DB90502D987FDE0DD5446ED48C098A" style="solid" width="3.0" 
justification="left" flags="print" date="D:20151207122813+01&apos;00&apos;" 
color="#4055ff" 
callout="356.7395,1471.7811,479.2464,1372.3664,494.2464,1327.1395" page="0" 
subject="Legend textfield" fringe="137.5069,-0.0,0.0,86.9147" 
rect="356.7395,1269.4126,704.3984,1471.7811" head="OpenArrow" title="matstoll" 
IT="FreeTextCallout"><contents>This is a legend with 
arrow</contents><defaultstyle>font: Courier 24pt; 
color:#BFAAFF</defaultstyle><defaultappearance>1.0 0.7490196078431373 0.0 rg 
/Helv 12 Tf</defaultappearance></freetext>
There might be more of such issues – but I think this should be sufficient info 
for now to check how to proceed.

Adobe Acrobat renders all these test cases correctly by the way, so I assume 
the XFDF elements are all correct.

I can provide the sample code if needed – where shall I upload it – if needed?

As I do not find that much info about the support of XFDF in various PDF 
libraries – what about the official support in PDFBox? Should all of the 
samples work? What are the plans to do so?

Thanks a lot in advance.

Herzliche Grüße / Best regards

Matthias Stoll
Project Manager PMP®
Application Business Services – Public Sector
+49 7031 450 4509 Office
+49 151 1475 2248 Mobile
Herrenberger Strasse 140, 71034 Böblingen

[email protected]<mailto:[email protected]>

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