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createInk not displaying in PDF on Ubuntu Linux

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Rob

createInk not displaying in PDF on Ubuntu Linux

I've created a PDF using iText itextpdf-5.1.3 and added an annotation by way of PdfAnnotation.createInk.

The annotation shows up fine on a windows/acrobat machine and also on EZPDF reader on Android.

The annotation DOES NOT display on 2 different versions of Ubuntu.

Can someone please confirm that they can see annotations on Ubuntu(or other Linux distros) made with the createInk method?

Thanks

Leonard Rosenthol-3

Re: createInk not displaying in PDF on Ubuntu Linux

What viewer on Ubuntu? Adobe Reader? Xpdf? Poppler? Other?

-----Original Message-----
From: Rob [mailto:[hidden email]]
Sent: Friday, January 13, 2012 10:56 AM
To: [hidden email]
Subject: [iText-questions] createInk not displaying in PDF on Ubuntu Linux

I've created a PDF using iText itextpdf-5.1.3 and added an annotation by way of PdfAnnotation.createInk.

The annotation shows up fine on a windows/acrobat machine and also on EZPDF reader on Android.

The annotation DOES NOT display on 2 different versions of Ubuntu.

Can someone please confirm that they can see annotations on Ubuntu(or other Linux distros) made with the createInk method?

Thanks

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Rob

Re: createInk not displaying in PDF on Ubuntu Linux

Ubuntu 9.04 64bit / Document Viewer(Evince) 2.26.1 using poppler 0.10.5 (cairo)
Ubuntu 9.04 64bit / Open Office 3.0.1
Ubuntu 9.04 64bit / Xournal 0.4.2.1

Ubuntu 10.04 32bit / Document Viewer 2.30.3 using poppler/cairo (0.12.4)

Leonard Rosenthol-3

Re: createInk not displaying in PDF on Ubuntu Linux

I would assume that those viewers don't support that annotation type.

-----Original Message-----
From: Rob [mailto:[hidden email]]
Sent: Friday, January 13, 2012 11:17 AM
To: [hidden email]
Subject: Re: [iText-questions] createInk not displaying in PDF on Ubuntu Linux

Ubuntu 9.04 64bit / Document Viewer(Evince) 2.26.1 using poppler 0.10.5
(cairo)
Ubuntu 9.04 64bit / Open Office 3.0.1
Ubuntu 9.04 64bit / Xournal 0.4.2.1

Ubuntu 10.04 32bit / Document Viewer 2.30.3 using poppler/cairo (0.12.4)

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Rob

Re: createInk not displaying in PDF on Ubuntu Linux

They do indeed support that type.

I have found that if I open the pdf in EZPDF reader on my android device and then save it. It 'fixes' the pdf and the annotations display in all the said Ubuntu viewers.

On closer inspection, by exporting xfdf files and comparing, it would seem that the ink tag written by iText is missing subject, createddate and date attributes. These are added by EZPDF when I open and then resave.

Might this be the reason the annotations are ignored and if so, is there a way to add these properties via iText?

Leonard Rosenthol-3

Re: createInk not displaying in PDF on Ubuntu Linux

Except that all those are optional attributes.

-----Original Message-----
From: Rob [mailto:[hidden email]]
Sent: Friday, January 13, 2012 3:17 PM
To: [hidden email]
Subject: Re: [iText-questions] createInk not displaying in PDF on Ubuntu Linux

They do indeed support that type.

I have found that if I open the pdf in EZPDF reader on my android device and then save it. It 'fixes' the pdf and the annotations display in all the said Ubuntu viewers.

On closer inspection, by exporting xfdf files and comparing, it would seem that the ink tag written by iText is missing subject, createddate and date attributes. These are added by EZPDF when I open and then resave.

Might this be the reason the annotations are ignored and if so, is there a way to add these properties via iText?

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Rob

Re: createInk not displaying in PDF on Ubuntu Linux

It may be that these attributes are not related to the problem, but id like to rule them out if possible.

Is iText capable of adding any of these optional attributes?

Rob

Re: createInk not displaying in PDF on Ubuntu Linux

It now appears that other annotation types are also not displaying in Ubuntu viewers.

Here's some code I've written that creates a file called pdf.test. It writes 'TEST' in capitals and then adds a large diagonal line (PdfAnnotation.createLine) next to it.

Ubuntu viewers are displaying only the text.

Can someone please confirm whether they see both the text (TEST) and the diagonal line on Ubuntu or other Linux Distro. Thanks.

import java.io.*;
import com.itextpdf.text.pdf.*;
import com.itextpdf.text.*;

public class test
{
public static void main(String arg[])throws Exception
{
Document document=new Document();
PdfWriter writer = PdfWriter.getInstance(document,new FileOutputStream("test.pdf"));

document.open();
document.add(new Paragraph("TEST"));

Rectangle rect = new Rectangle(119.0f,579.0f,354.0f,778.0f);
PdfAnnotation annotation = PdfAnnotation.createLine(writer, rect, "", 120.0f, 580.0f, 353.0f, 777.0f);
writer.addAnnotation(annotation);

document.close();
}
}

Paulo Soares-3

Re: createInk not displaying in PDF on UbuntuLinux

It may be that those viewers can't create the appearance as Acrobat does. You may create it with iText but you'll have to do it yourself.

Paulo

----- Original Message -----

From: [hidden email]

To: [hidden email]

Sent: Saturday, January 14, 2012 11:49 AM

Subject: Re: [iText-questions] createInk not displaying in PDF on UbuntuLinux

It now appears that other annotation types are also not displaying in Ubuntu
viewers.

Here's some code I've written that creates a file called pdf.test. It writes
'TEST' in capitals and then adds a large diagonal line
(PdfAnnotation.createLine) next to it.

Ubuntu viewers are displaying only the text.

Can someone please confirm whether they see both the text (TEST) and the
diagonal line on Ubuntu or other Linux Distro. Thanks.

import java.io.*;
import com.itextpdf.text.pdf.*;
import com.itextpdf.text.*;

public class test
   {
    public static void main(String arg[])throws Exception
      {
       Document document=new Document();
       PdfWriter writer = PdfWriter.getInstance(document,new
FileOutputStream("test.pdf"));

       document.open();
       document.add(new Paragraph("TEST"));

       Rectangle rect = new Rectangle(119.0f,579.0f,354.0f,778.0f);
       PdfAnnotation annotation = PdfAnnotation.createLine(writer, rect, "",
120.0f, 580.0f, 353.0f, 777.0f);
       writer.addAnnotation(annotation);

       document.close();
      }
}

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Rob

Re: createInk not displaying in PDF on UbuntuLinux

It's strange that after resaving the file in something like ezpdf/android or pdf-exchange-viewer/windows the Ubuntu viewers display everything as intended. The only difference I can see from exporting an xfdf file is that the ink tag has been given a 'date' attribute which the initial iText save doesn;t add.

Paulo Soares-3 wrote

It may be that those viewers can't create the appearance as Acrobat does. You may create it with iText but you'll have to do it yourself.

Can you please elaborate on what you mean by an 'appearance'. Is this something I can control manually via iText methods?

Paulo Soares-3

Re: createInk not displaying in PDF on UbuntuLinux

It probably also has a /A key. It would be helpful to post both PDFs.

Paulo

----- Original Message -----

From: [hidden email]

To: [hidden email]

Sent: Saturday, January 14, 2012 7:19 PM

Subject: Re: [iText-questions] createInk not displaying in PDF on UbuntuLinux

It's strange that after resaving the file in something like ezpdf/android or
pdf-exchange-viewer/windows the Ubuntu viewers display everything as
intended. The only difference I can see from exporting an xfdf file is that
the ink tag has been given a 'date' attribute which the initial iText save
doesn;t add.

Paulo Soares-3 wrote
>
> It may be that those viewers can't create the appearance as Acrobat does.
> You may create it with iText but you'll have to do it yourself.

Can you please elaborate on what you mean by an 'appearance'. Is this
something I can control manually via iText methods?

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Rob

Re: createInk not displaying in PDF on UbuntuLinux

Paulo Soares-3 wrote

It probably also has a /A key. It would be helpful to post both PDFs.

Attached
test.pdf
test-resaved.pdf

Paulo Soares-3

Re: createInk not displaying in PDF on UbuntuLinux

It's missing the appearance (the /AP key). Create the annotation in Acrobat, look at the PDF generated and reproduce it with iText. I found out long ago that this is the only reliable way to have them work.

Paulo

----- Original Message -----

From: [hidden email]

To: [hidden email]

Sent: Saturday, January 14, 2012 10:04 PM

Subject: Re: [iText-questions] createInk not displaying in PDF on UbuntuLinux

Paulo Soares-3 wrote
>
> It probably also has a /A key. It would be helpful to post both PDFs.
>

Attached
http://itext-general.2136553.n4.nabble.com/file/n4295782/test.pdf test.pdf
http://itext-general.2136553.n4.nabble.com/file/n4295782/test-resaved.pdf
test-resaved.pdf

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Rob

Re: createInk not displaying in PDF on UbuntuLinux

Paulo Soares-3 wrote

It's missing the appearance (the /AP key). Create the annotation in Acrobat, look at the PDF generated and reproduce it with iText. I found out long ago that this is the only reliable way to have them work.

Paulo

That's great news! I see that the AP key in test-resaved.pdf is /AP<</N 10 0 R>>

Looking at the available PdfAnnotation methods I can see that setAppearance is available. How would one recreate the above AP key with this method?

Paulo Soares-3

Re: createInk not displaying in PDF on UbuntuLinux

Let's take the Line annotation. The annotation parameters describe the line. You'll have to create a PdfTemplate with the actual graphic representation of the line using moveTo(), lineTo() and others.

Paulo

----- Original Message -----

From: [hidden email]

To: [hidden email]

Sent: Sunday, January 15, 2012 8:52 PM

Subject: Re: [iText-questions] createInk not displaying in PDF on UbuntuLinux

Paulo Soares-3 wrote
>
> It's missing the appearance (the /AP key). Create the annotation in
> Acrobat, look at the PDF generated and reproduce it with iText. I found
> out long ago that this is the only reliable way to have them work.
>
> Paulo
>

That's great news! I see that the AP key in test-resaved.pdf is /AP<</N 10 0
R>>

Looking at the available PdfAnnotation methods I can see that setAppearance
is available. How would one recreate the above AP key with this method?

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Rob

Re: createInk not displaying in PDF on UbuntuLinux

Paulo Soares-3 wrote

Let's take the Line annotation. The annotation parameters describe the line. You'll have to create a PdfTemplate with the actual graphic representation of the line using moveTo(), lineTo() and others.

I have limited experience with appearances in PDF. Initially I thought that the AP key was the only thing needed to make an annotation display in this instance.

I've since been reading and am getting an idea that the AP key mentioned is just a pointer to a different section in the pdf referred to as an appearance which is a graphical representation of the original annotation. This is used in place of the annotation when a reader cannot render annotations from the basic vector info provided. Is this correct?

If so, I am wondering whether I will be able to employ this solution as I'm still a little confused whether I can build this graphical representation from the original vector information or whether I need to manually create a pdf with AP included which I need to read from? (manual intervention would make attempts to script this process pointless).

Considering another way forward, is iText capable of completely flattening the annotation so that it all becomes a rendered part of the main layer? I assume I would lose any separate annotation data but this is acceptable if it will create a document that displays as intended on the Ubuntu viewers.

Paulo Soares-3

Re: createInk not displaying in PDF on UbuntuLinux

Do you really need an annotation or just something drawn on top of the content?

Paulo

-----Original Message-----
From: Rob [mailto:[hidden email]]
Sent: Monday, January 16, 2012 2:03 PM
To: [hidden email]
Subject: Re: [iText-questions] createInk not displaying in PDF on UbuntuLinux

Paulo Soares-3 wrote
>
> Let's take the Line annotation. The annotation parameters describe the
> line. You'll have to create a PdfTemplate with the actual graphic
> representation of the line using moveTo(), lineTo() and others.
>

I have limited experience with appearances in PDF. Initially I thought that
the AP key was the only thing needed to make an annotation display in this
instance.

I've since been reading and am getting an idea that the AP key mentioned is
just a pointer to a different section in the pdf referred to as an
appearance which is a graphical representation of the original annotation.
This is used in place of the annotation when a reader cannot render
annotations from the basic vector info provided. Is this correct?

If so, I am wondering whether I will be able to employ this solution as I'm
still a little confused whether I can build this graphical representation
from the original vector information or whether I need to manually create a
pdf with AP included which I need to read from? (manual intervention would
make attempts to script this process pointless).

Considering another way forward, is iText capable of completely flattening
the annotation so that it all becomes a rendered part of the main layer? I
assume I would lose any separate annotation data but this is acceptable if
it will create a document that displays as intended on the Ubuntu viewers.

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Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php

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Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php

Leonard Rosenthol-3

Re: createInk not displaying in PDF on UbuntuLinux

In reply to this post by Rob

All of the pieces you need are in iText - they are just LOW LEVEL pieces
that you will need put together to make this work.

You'll need to start by reading and understanding the PDF standard (ISO
32000-1:2008) about exactly what an appearance stream is, how it is used,
etc. Then you can use the pieces in iText to create one, connect it up,
and voila.

NOT trivial - but certainly well defined and doable.

Leonard

On 1/16/12 6:02 AM, "Rob" <[hidden email]> wrote:

>
>Paulo Soares-3 wrote
>>
>> Let's take the Line annotation. The annotation parameters describe the
>> line. You'll have to create a PdfTemplate with the actual graphic
>> representation of the line using moveTo(), lineTo() and others.
>>
>
>I have limited experience with appearances in PDF. Initially I thought
>that
>the AP key was the only thing needed to make an annotation display in this
>instance.
>
>I've since been reading and am getting an idea that the AP key mentioned
>is
>just a pointer to a different section in the pdf referred to as an
>appearance which is a graphical representation of the original annotation.
>This is used in place of the annotation when a reader cannot render
>annotations from the basic vector info provided. Is this correct?
>
>If so, I am wondering whether I will be able to employ this solution as
>I'm
>still a little confused whether I can build this graphical representation
>from the original vector information or whether I need to manually create
>a
>pdf with AP included which I need to read from? (manual intervention would
>make attempts to script this process pointless).
>
>Considering another way forward, is iText capable of completely flattening
>the annotation so that it all becomes a rendered part of the main layer? I
>assume I would lose any separate annotation data but this is acceptable if
>it will create a document that displays as intended on the Ubuntu viewers.
>
>--
>View this message in context:
>http://itext-general.2136553.n4.nabble.com/createInk-not-displaying-in-PDF
>-on-Ubuntu-Linux-tp4292565p4299563.html
>Sent from the iText - General mailing list archive at Nabble.com.
>
>--------------------------------------------------------------------------
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>RSA(R) Conference 2012
>Mar 27 - Feb 2
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>[hidden email]
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>
>iText(R) is a registered trademark of 1T3XT BVBA.
>Many questions posted to this list can (and will) be answered with a
>reference to the iText book: http://www.itextpdf.com/book/
>Please check the keywords list before you ask for examples:
>http://itextpdf.com/themes/keywords.php

Rob

Re: createInk not displaying in PDF on UbuntuLinux

In reply to this post by Paulo Soares-3

Paulo Soares-3 wrote

Do you really need an annotation or just something drawn on top of the content?

If it's less involved, something drawn on top of the content would be fine.

Rob

Re: createInk not displaying in PDF on UbuntuLinux

In reply to this post by Paulo Soares-3

Paulo Soares-3 wrote

Do you really need an annotation or just something drawn on top of the content?

Thanks Paulo, your reply made me focus on redrawing using PdfContentByte.moveTo and lineTo and I now have the vectors written directly on the document. I would have preferred annotations but this is an acceptable solution.

An issue I am now trying to overcome is that the original annotations where fluid gestures using ink tags. Although the new drawings are x/y point accurate. There are hard edge due to the nature of lineTo. Is there a way to match the original smoothness of the inklist/gestures?