Font Name and Size Change When Converting ODP to HTML in C#

Aspose.Slides Product Family
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1

This is unrelated to the original issue, but thought maybe i don’t need to make a separate topic about the following issue:

In this Odp file here:
original.7z (14.2 KB)

after converting to HTML using the code above, we get a resulting HTML here:
original.zip (729 Bytes)

If you open the ODP file in MS Powerpoint, the texts have Font: Aptos, and font size 24.
But in the html from what i can see, the styling is changed to Arial and font-size=“17.999819pt”.
This seems inconsistent with the original document. Is there something we need to do in the HTML conversion settings for this to work as expected?

code used:

var odpFilePath = "original.odp";
var odpSavePath = "original.html";
using Presentation presentation = new Presentation(odpFilePath);
HtmlOptions options = new HtmlOptions
{
    SvgResponsiveLayout = true,
    HtmlFormatter = HtmlFormatter.CreateDocumentFormatter("", showSlideTitle: false)
};
presentation.Save(odpSavePath, SaveFormat.Html, options);

Edit: I also tried converting to HTML5 and get the same result.
Version used: Aspose.Slides.NET6.CrossPlatform Version=“25.11.0”

2

@IBurzoEvoRWS,
Thank you for reporting the issue. I have reproduced the problem where the font size changes when converting the ODP file to HTML. We apologize for any inconvenience caused.

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): SLIDESNET-45214

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

Please note that the Aptos font changes to Arial because Aptos was not installed on the operating system where the ODP-to-HTML conversion was performed. You should install the font or use the FontsLoader to load it as an external font at runtime before the conversion, as shown below:

FontsLoader.LoadExternalFonts(["path_to_a_folder_with_the_font"]);

Customize PowerPoint Fonts in .NET|Aspose.Slides Documentation
Font Selection Sequence in Aspose.Slides for .NET|Aspose.Slides Documentation
FAQ|Aspose.Slides Documentation

Unfortunately, I was unable to reproduce the issue where the font size changes when converting the ODP file to HTML5.
Output: output_html5.zip (22.6 KB)