Getting blank Hindi text in pdf file when converting pptx to pdf

[Abhishek Singhal]

Hi

We are trying to convert pptx to pdf using the presentationtopdfconverter in Azure App Service.

The file is converted successfully, but Hindi text is not rendered in the pdf.

Tried to use font substitution, and found that no missing font is reported, perhaps because we are embedding fonts in the presentation.

Input PPTX and the output PDF files are attached.

Pl advise asap.

Thanks

Attachment: PPTX_6824a254.zip

[Manikandan Ravichandran]

Hi Abhishek,

Thank you for contacting Syncfusion support

We can reproduce the reported issue with “Hindi text preservation issue while converting PPTX document to PDF in Azure environment” in our end, and we suspect it to be a defect. We will validate this issue and update you with more details on 6^th July 2020.

Please let us know if you have any other questions.

Regards,
Manikandan Ravichandran

[Abhishek Singhal]

Hi Abhishek,

Thank you for contacting Syncfusion support

We can reproduce the reported issue with “Hindi text preservation issue while converting PPTX document to PDF in Azure environment” in our end, and we suspect it to be a defect. We will validate this issue and update you with more details on 6^th July 2020.

Please let us know if you have any other questions.

Regards,
Manikandan Ravichandran

Thanks for your confirmation.

Kindly provide a solution/workaround asap because this is a production LMS app and issue reported by our end users.

Thanks

[Manikandan Ravichandran]

Hi Abhishek,

Thank you for your patience.

From our further investigation, we found this text missing issue occurs due to using a default font “Arial” font to draw the “Hindi” (complex script) text, instead of a “Mangal” font. Also, we found this requirement as “Support to detect a font name from theme for complex script characters while PPTX to PDF conversion” feature in our end. However, we have planned to include this feature in our 2020 Volume 3 Main release which is estimated to be available on end of September 2020 tentatively.

The status of the feature can be tracked through below feedback link.
https://www.syncfusion.com/feedback/15802/support-to-detect-a-font-name-from-theme-for-complex-script-characters-while-pptx

Please let us know if you have any other questions.

Regards,
Manikandan Ravichandran 

[Abhishek Singhal]

Thanks for getting back.

Is there any instruction we can give to user regarding their pptx file so that it can get converted correctly ?

Kindly advise.

[Manikandan Ravichandran]

Hi Abhishek,

Thank you for your update.

To resolve the reported Hindi text missing issue, we suggest you to mention the font used for the Hindi text to the corresponding text in the presentation document by iterating the each shapes and slides as mentioned below.

 

//Load the PowerPoint document
IPresentation pptxDoc = Presentation.Open(@"महिला सशक्तिकरण (नारी शक्ति).pptx");
ApplyFont(pptxDoc);
//Initialize the conversion settings
PresentationToPdfConverterSettings pdfConverterSettings = new PresentationToPdfConverterSettings();
//Enable the portable rendering.
pdfConverterSettings.EnablePortableRendering = true;
//Convert the PowerPoint document to PDF
PdfDocument pdfDoc = PresentationToPdfConverter.Convert(pptxDoc, pdfConverterSettings);
//Save the converted PDF file.
pdfDoc.Save("Sample.pdf");
//Close the presentation instance
pptxDoc.Close();
//Close the PDF instance
pdfDoc.Close();
Process.Start("Sample.pdf"); 

private void ApplyFont(IPresentation pptxDoc)
{
    foreach (ISlide slide in pptxDoc.Slides)
    {
        foreach (IShape shape in slide.Shapes)
        {
            foreach (IParagraph paragraph in shape.TextBody.Paragraphs)
            {
                 foreach (ITextPart textPart in paragraph.TextParts)
                 {
                       textPart.Font.FontName = "Mangal";
                  }
             }
        }
   }
} 

As mentioned earlier, we will planned to implement and include this feature in our 2020 volume 3 main release which will be available on end of September 2020.

Please let us know if you have any other questions.

Regards,
Manikandan Ravichandran 

[Abhishek Singhal]

Two issues

- How to find which font to replace. Using the code provided, all fonts would get replaced - even in a normal English pptx. We don't know what file is uploaded by which user and need to handle all types of files.

- Using the code provided, we got the pdf as attached. There are spelling changes and > character is introduced at many places. Output is not in "ready" shape.

Pl advise asap.

Attachment: outxxfile_b0fd8345.zip

[Manikandan Ravichandran]

Hi Abhishek,

Thank you for your update.

We have suggested a workaround solution to resolve the particular document alone. Once the mentioned feature implemented the reported issue will resolve in your end. As mentioned earlier, we have planned to implement and include this feature in our 2020 volume 3 main release which will be available on end of September 2020 tentatively.

Reg - There are spelling changes and > character is introduced at many places. Output is not in "ready" shape.
We have ensured the document given document with the provide code example, and its working fine in our end. We have attached the generated output document in Azure environment and it can be downloaded from the below link.
https://www.syncfusion.com/downloads/support/forum/155681/ze/Output-469805964

We have published application I  Azure environment, kindly ensure the document using this link.
https://mvcsample20200702125126.azurewebsites.net/

Please let us know if you have any other questions.

Regards,
Manikandan Ravichandran 

[Abhishek Singhal]

Hello

Is it possible to provide a workaround for detecting type of document and applying the font substitution in that case only ?

Sep 2020 is ~3 months away and we need to provide our users with some mechanism to convert such pptx to pdf.

Thanks

[Manikandan Ravichandran]

Hi Abhishek,

Thank you for your update.

As mentioned earlier, we don’t have any workaround for resolving the issue until the mentioned feature implemented. We have planned to implement and include this feature in our 2020 volume 3 main release which will be available on end of September 2020 tentatively.

Please let us know if you need any further assistances in this.

Regards,
Manikandan Ravichandran 

[Manikandan Ravichandran]

Hi Abhishek,

We are glad to announce that our Essential Studio 2020 Volume 3 release v18.3.0.35 is rolled out and is available for download under the following link.

https://www.syncfusion.com/forums/158306/essential-studio-2020-volume-3-release-v18-3-0-35-is-available-for-download

We thank you for your support and appreciate your patience in waiting for this release. Please get in touch with us if you would require any further assistance.

Regards,
Manikandan Ravichandran