PDF signature location not matching image

The location of the signature in the PDF page do not match the image location in the page.

screenshot url: https://ibb.co/gtKjKN6

This is how I add the signature location and the image location:

PdfLoadedPage page = document.Pages[0] as PdfLoadedPage;

PdfGraphics graphics = page.Graphics;

PdfSignature signature = new PdfSignature(document, page, null, "Sig1");

Assembly myAssembly = Assembly.GetExecutingAssembly();

System.IO.Stream myStream = myAssembly.GetManifestResourceStream("img.pacman.png");

PdfBitmap signatureImage = new PdfBitmap(Image.FromStream(myStream));

//Sets signature information

signature.Bounds = new RectangleF(new PointF(0, 0), signatureImage.PhysicalDimension);

//Draws the signature image.

graphics.DrawImage(signatureImage, 0, 0);

Why it's doesn't match? Also, how can I identify the page corners (top-left, top-right, bottom-left, bottom-right) if I wanna put the signature and the image in any of these positions?

Hi Ahmad, 

Greetings from Syncfusion. 

We were able to reproduce the reported issue and suspect that this to be a defect. Currently we are validating the same. We will update the further details by 3^rd May, 2019. 

Regards, 

Sowmiya L 

Hi Ahmad, 

Thanks for the patience. 

 

We confirm that the issue with “Position has been changed while adding signature in an existing PDF document” is a bug and the fix for this issue will be included in Vol 2 2019 release which will be available in the month of June. 

 

Regards, 

Sowmiya L 

Hi Ahmad, 

We request you to visit our website for release updates. 

Regards, 

Sowmiya L 

I use the latest release (17.2460.0.34) and I have the same problem.

Can you suggest any workaround?

Hi Stavros,  

 

We have checked with the issue “Position has been changed while adding signature in an existing PDF document” in the product version 17.2.0.34 which you have mentioned. The fix for this issue has been moved in the product version 17.2.0.34. Please refer the below release notes link for more details, 

https://help.syncfusion.com/windowsforms/release-notes/v17.2.0.34?type=all#pdf  

We have created the sample to demonstrate the same from below, 

Sample link: https://www.syncfusion.com/downloads/support/forum/144285/ze/BaseSample695821557  

Kindly try the above sample in your end and let us know if you have any concerns on this. 

Regards, 

Sowmiya L 

I suspect that there may be a bug on the Y property setter function. Can you verify it? I tried it with the latest NuGet version (17.2460.0.39).

I tried to set the signature bounds with the following code (VB.NET, it works similar on C#)

...

Dim doc As New PdfLoadedDocument(inputfile)

Dim page As PdfLoadedPage = doc.Pages(0)

Dim signature As New PdfSignature(doc, page, PDFCert, "Signature")
...

The Y value on the signature bounds is not equal with the Y value on the bounds variable.

Then I tried this:

The result on the watch window is as shown on the table:

	Name	Value	Type
▶	signature.Bounds	{X = 5 Y = 560.228333 Width = 226.771667 Height = 113.385834}	System.Drawing.RectangleF

Hi Starvos, 

Currently we are validating the reported behaviour of “Y position has been changed when setting bounds to signature in PDF document”. We will update the further details by 07^th August, 2019. 

Regards, 

Sowmiya L   

Hi Starvos, 

 

We have confirmed that the issue with “Y position has been changed when setting bounds to signature in PDF document” is a defect and the patch for this issue will be available on 14^th  August 2019.  

 

Regards, 

Sowmiya L 

Hi Sowmiya,

Is there any new estimated date for the patch?

Regards,

Stavros D

Hi Starvos, 

Sorry for inconvenience caused.  

We have fixed the reported issue but due to technical issue in our end, we are unable to generate patch for this issue.  We will provide the patch for this issue by tomorrow (21^st  August 2019) without fail. 

 

Regards, 

Gowthamraj K 

Hi Starvos, 

The issue with “Y position has been changed when setting bounds to signature in PDF document” has been fixed and the patch for this fix can be downloaded from the following location.   

Recommended approach - exe will perform automatic configuration  

Please find the patch setup from below location:  

http://syncfusion.com/Installs/support/patch/17.2.0.34/1129282/F144285/SyncfusionPatch_17.2.0.34_1129282_8212019055452292_F144285.exe 

Advanced approach – use only if you have specific needs and can directly replace existing assemblies for your build environment  

Please find the patch assemblies alone from below location:  

http://syncfusion.com/Installs/support/patch/17.2.0.34/1129282/F144285/SyncfusionPatch_17.2.0.34_1129282_8212019055452292_F144285.zip 

NuGet packages: http://syncfusion.com/Installs/support/patch/17.2.0.34/1129282/F144285/SyncfusionNuget_17.2.0.34_1129282_8212019055452292_F144285.zip 

 

Assembly Version: 17.2.0.34  

 

Installation Directions :   

This patch should replace the files “Syncfusion.Pdf.Base.dll” under the following folder.  

$system drive:\ Files\Syncfusion\Essential Studio\$Version # \precompiledassemblies\$Version#\4.5.1  

Eg : $system drive:\Program Files\Syncfusion\Essential Studio\17.2.0.34 \precompiledassemblies\17.2.0.34 \4.0  

To automatically run the Assembly Manager, please check the Run assembly manager checkbox option while installing the patch. If this option is unchecked, the patch will replace the assemblies in precompiled assemblies’ folder only. Then, you will have to manually copy and paste them to the preferred location or you will have to run the Syncfusion Assembly Manager application (available from the Syncfusion Dashboard, installed as a shortcut in the Application menu) to re-install assemblies.  

Disclaimer :   

Please note that we have created this patch for version 17.2.0.34 specifically to resolve the following issue(s) reported in this/the Forum(s). 144285 

If you have received other patches for the same version for other products, please apply all patches in the order received.  

This fix will be included in our 2019 Volume 3 release which will be available by end of September 2019 tentatively. 

 

Regards, 

Surya Kumar 

Dear Kumar,

When I try to download the patcch I get the error "You are not authorized to download this patch.".

I will wait till the 2019 Volume 3 release.

Best regards,

Stavros D

Hi Stavros, 

We will include the fix the issue “Y position has been changed when setting bounds to signature in PDF document” in upcoming weekly NuGet release which is expected to available by 27^th August, 2019.  

Regards, 

Sowmiya L 

Hi Stavros, 

We have included the code changes for the reported issue “Y position has been changed when setting bounds to signature in PDF document” in weekly NuGet release (v17.2.0.47) and it is rolled out today. Please find the NuGet package link from below, 

 

https://www.nuget.org/packages/Syncfusion.Pdf.WinForms/17.2.0.47  

Please let us know if you need any further assistance on this. 

Regards, 

Sowmiya L 

Thank you!

I was facing the same issue and I ended up here in this thread after googling it. I am very happy for you provided a fix for this bug. Thank you very much!

Thanks for the update.

It works almost fine.

There is still one small problem with some landscape pages.

In some cases the signature box (the one with the validation image) is positioned correctly, in some other cases it is rotated.

I try to insert the signature at x,y and it is positioned as if it was potitioned at x,y and then rotated to landscape.

To recreate the problem:

- create a file with word or other software.

- set the page orientation to "Landscape"

- print using "Adobe PDF" printer.

I attached a file that displays the problem.

I use the libraries v17.3.0.29.
Update: I also tried 17.3.0.30.

Hi Stavros, 

We have analyzed the reported issue with the provided document and found that the page in PDF is rotated to 90 degree. Please refer the below screenshot for more details, 

 

However currently we are analyzing about this and provide the further details by 9^th December, 2019.  

Regards, 

Sowmiya Loganathan 

 

Hi Stavros, 

 

At present we do not have support to handle the signature field based on the page rotation. We have considered this as a usability feature “Rotate signature appearance based on rotation” and patch for this feature implementation is estimated to be available on 23rd December 2019. 

 

Regards, 

Sowmiya Loganathan 

Thank you!

Hi Stavros,  

 

The patch for this fix can be downloaded from the following location.      

   

Recommended approach - exe will perform automatic configuration     

Please find the patch setup from below location:     

Advanced approach – use only if you have specific needs and can directly replace existing assemblies for your build environment     

http://syncfusion.com/Installs/support/patch/17.4.0.39/664065/F144285/SyncfusionPatch_17.4.0.39_664065_12232019075704670_F144285.exe 

 

Please find the patch assemblies alone from below location:     

http://syncfusion.com/Installs/support/patch/17.4.0.39/664065/F144285/SyncfusionPatch_17.4.0.39_664065_12232019075704670_F144285.zip 

 

NuGet packages : http://syncfusion.com/Installs/support/patch/17.4.0.39/664065/F144285/SyncfusionNuget_17.4.0.39_664065_12232019075704670_F144285.zip 

 

Assembly Version: 17.4.0.39 

    

Installation Directions :      

This patch should replace the files “Syncfusion.Pdf.Base.dll” under the following folder.     

$system drive:\ Files\Syncfusion\Essential Studio\$Version # \precompiledassemblies\$Version#\4.6    

Eg : $system drive:\Program Files\Syncfusion\Essential Studio\17.4.0.39\precompiledassemblies\17.4.0.39\4.6  

   

To automatically run the Assembly Manager, please check the Run assembly manager checkbox option while installing the patch. If this option is unchecked, the patch will replace the assemblies in precompiled assemblies’ folder only. Then, you will have to manually copy and paste them to the preferred location or you will have to run the Syncfusion Assembly Manager application (available from the Syncfusion Dashboard, installed as a shortcut in the Application menu) to re-install assemblies.     

    

Disclaimer :      

Please note that we have created this patch for version 17.4.0.39 specifically to resolve the following issue(s) reported in this/the Forum(s). 144285 

   

If you have received other patches for the same version for other products, please apply all patches in the order received.     

   

This fix will be included in our 2019 Volume 4  SP1 release which will be available by end of January 2020 tentatively.    

 

Regards, 

Moorthy K