kendopdfviewer rendering pixelated on some computers...

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Greg
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Greg asked on 06 Dec 2022, 09:11 PM

Hi - we have hundreds of thousands of users that access PDF documents using our products, which use the KendoPdfViewer for jQuery to display PDF documents in a web Application.  We are receiving reports that some users are seeing pixelation, or dropped pixels, in many PDF documents.  If they download the document and open it in a viewer of their choice, it is fine.  Incidentally, I see the same pixelation on your demo page for KendoPdfViewer (https://demos.telerik.com/kendo-ui/pdfviewer/index).  I have one machine in my possession (Windows 10) that seems to have the problem.  I have tried several different browsers and the result is the same.  I have a Windows 11 machine that works fine.  I tried upgrading pdf.js to the latest version, and updated Kendo to 2022.3.1109 - only slight improvement.  I uploaded screenshots highlighting the issue both on Telerik's page and ours.

Has anyone else encountered this?  Did you find a solution?  

We love Telerik but will need to find an alternative soon if we cannot resolve this problem.

Thanks!

 

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Martin
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answered on 09 Dec 2022, 02:46 PM

Hello, Greg,

Could you please let me know if the issue occurs when you use DPL content loading instead of PDFjs? If not, the issue is probably related to PDFjs. Also, could you please share any useful information about the devices on which the problem can be seen so that we can try to reproduce?

Looking forward to your reply.

Regards,
Martin
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