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MathanKumarVaradhaRajaPerumal merged 7 commits into from
Dec 9, 2025
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995109 - Update Supported Script types on fallback in DocIO and PowerPoint UG #1916

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ec8dc35
Added newly supported Script types in DocIO and PPTX
Karan-SF4772 Dec 5, 2025
103775f
Added Word to PDF work
Karan-SF4772 Dec 5, 2025
d54c8a1
Added Supported Fallback content on DocIO and PPTX
Karan-SF4772 Dec 8, 2025
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Addressed feedback
Karan-SF4772 Dec 9, 2025
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Merge branch 'development' of https://github.com/syncfusion-content/d…
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Merge branch 'development' of https://github.com/syncfusion-content/d…
Karan-SF4772 Dec 9, 2025
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248 changes: 248 additions & 0 deletions ...Conversions/PowerPoint-To-Image/NET/Fallback-Fonts-in-PPTXtoImage-Conversion.md
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Expand Up @@ -103,6 +103,45 @@ using (FileStream fileStreamInput = new FileStream("Template.pptx", FileMode.Ope

You can download a complete working sample from [GitHub](https://github.com/SyncfusionExamples/PowerPoint-Examples/tree/master/PPTX-to-Image-conversion/Fallback-fonts-based-on-scripttype).

## Fallback Symbols based on script type

The following code example demonstrates how a user can add fallback fonts for Symbols and Emojis, which Presentation considers internally when converting a PowerPoint presentation to an Image.

{% tabs %}

{% highlight C# tabtitle="C# [Cross-platform]" %}
//Load the PowerPoint presentation into stream.
using (FileStream fileStreamInput = new FileStream("Template.pptx", FileMode.Open, FileAccess.Read))
{
//Open the existing PowerPoint presentation with loaded stream.
using (IPresentation pptxDoc = Presentation.Open(fileStreamInput))
{
//Adds fallback font for basic symbols like bullet characters.
pptxDoc.FontSettings.FallbackFonts.Add(ScriptType.Symbols, "Segoe UI Symbol, Arial Unicode MS, Wingdings");
//Adds fallback font for mathematics symbols.
pptxDoc.FontSettings.FallbackFonts.Add(ScriptType.Mathematics, "Cambria Math, Noto Sans Math, Segoe UI Symbol, Arial Unicode MS");
//Adds fallback font for emojis.
pptxDoc.FontSettings.FallbackFonts.Add(ScriptType.Emoji, "Segoe UI Emoji, Noto Color Emoji, Arial Unicode MS");
//Initialize the PresentationRenderer to perform image conversion.
pptxDoc.PresentationRenderer = new PresentationRenderer();
//Convert PowerPoint slide to image as stream.
using (Stream stream = pptxDoc.Slides[0].ConvertToImage(ExportImageFormat.Jpeg))
{
//Reset the stream position.
stream.Position = 0;
//Create the output image file stream.
using (FileStream fileStreamOutput = File.Create("Output.jpg"))
{
//Copy the converted image stream into created output stream.
stream.CopyTo(fileStreamOutput);
}
}
}
}
{% endhighlight %}

{% endtabs %}

## Fallback fonts for range of Unicode text

Users can set fallback fonts for specific Unicode range of text to be used in Presentation to Image conversion.
Expand Down Expand Up @@ -307,6 +346,215 @@ Korean
Malgun Gothic, Batang
</td>
</tr>
<tr>
<td>Tamil</td>
<td>0x0B80 - 0x0BFF</td>
<td>Latha, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Bengali</td>
<td>0x0980 - 0x09FF</td>
<td>Vrinda, Arial Unicode MS, Nikosh, Siyam Rupali, Nirmala UI</td>
</tr>
<tr>
<td>Gujarati</td>
<td>0x0A80 - 0x0AFF</td>
<td>Shruti, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Telugu</td>
<td>0x0C00 - 0x0C7F</td>
<td>Gautami, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Malayalam</td>
<td>0x0D00 - 0x0D7F</td>
<td>Kartika, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Kannada</td>
<td>0x0C80 - 0x0CFF</td>
<td>Tunga, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Ethiopic</td>
<td>0x1200 - 0x137F<br>
0x1380 - 0x139F</td>
<td>Nyala, Ebrima</td>
</tr>
<tr>
<td>Khmer</td>
<td>0x1780 - 0x17FF<br>
0x19E0 - 0x19FF</td>
<td>MoolBoran, DaunPenh, Leelawadee, Leelawadee UI</td>
</tr>
<tr>
<td>Gurmukhi</td>
<td>0x0A00 - 0x0A7F</td>
<td>Raavi, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Canadian</td>
<td>0x1400 - 0x167F</td>
<td>Euphemia, Gadugi</td>
</tr>
<tr>
<td>Cherokee</td>
<td>0x13A0 - 0x13FF<br>
0xAB70 - 0xABBF</td>
<td>Plantagenet Cherokee, Gadugi, Arial Unicode MS</td>
</tr>
<tr>
<td>Yi</td>
<td>0xA000 - 0xA48F<br>
0xA490 - 0xA4CF</td>
<td>Microsoft Yi Baiti, Arial Unicode MS</td>
</tr>
<tr>
<td>Tibetan</td>
<td>0x0F00 - 0x0FFF</td>
<td>Microsoft Himalaya, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Thaana</td>
<td>0x0780 - 0x07BF</td>
<td>MV Boli, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Syriac</td>
<td>0x0700 - 0x074F</td>
<td>Estrangelo Edessa, Segoe UI Historic, Arial Unicode MS</td>
</tr>
<tr>
<td>Odia</td>
<td>0x0B00 - 0x0B7F</td>
<td>Kalinga, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Lao</td>
<td>0x0E80 - 0x0EFF</td>
<td>DokChampa, Lao UI, Leelawadee UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Sinhala</td>
<td>0x0D80 - 0x0DFF</td>
<td>Iskoola Pota, Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Mongolian</td>
<td>0x1800 - 0x18AF</td>
<td>Mongolian Baiti, Microsoft YaHei, Arial Unicode MS</td>
</tr>
<tr>
<td>Vietnamese</td>
<td>0x00C0 - 0x00FF<br>
0x0102 - 0x0103<br>
0x0110 - 0x0111<br>
0x0128 - 0x0129<br>
0x0168 - 0x0169<br>
0x01A0 - 0x01A1<br>
0x01AF - 0x01B0<br>
0x0300 - 0x036F</td>
<td>Times New Roman, Arial, Tahoma, Arial Unicode MS</td>
</tr>
<tr>
<td>Georgian</td>
<td>0x10A0 - 0x10FF<br>
0x2D00 - 0x2D2F</td>
<td>Sylfaen, Arial Unicode MS</td>
</tr>
<tr>
<td>Armenian</td>
<td>0x0530 - 0x058F<br>
0xFB13 - 0xFB17</td>
<td>Arial, Sylfaen, Arial Unicode MS</td>
</tr>
<tr>
<td>Buginese</td>
<td>0x1A00 - 0x1A1F</td>
<td>Leelawadee UI, Segoe UI Symbol</td>
</tr>
<tr>
<td>Bopomofo</td>
<td>0x3100 - 0x312F<br>
0x31A0 - 0x31BF</td>
<td>Microsoft JhengHei, PMingLiU, SimSun, Arial Unicode MS</td>
</tr>
<tr>
<td>Javanese</td>
<td>0xA980 - 0xA9DF</td>
<td>Javanese Text, Segoe UI Symbol</td>
</tr>
<tr>
<td>Lisu</td>
<td>0xA4D0 - 0xA4FF</td>
<td>Segoe UI Symbol, Arial Unicode MS</td>
</tr>
<tr>
<td>Burmese</td>
<td>0x1000 - 0x109F<br>
0xAA60 - 0xAA7F</td>
<td>Myanmar Text, Noto Sans Myanmar, Padauk</td>
</tr>
<tr>
<td>NKo</td>
<td>0x07C0 - 0x07FF</td>
<td>Ebrima, Arial Unicode MS</td>
</tr>
<tr>
<td>OlChiki</td>
<td>0x1C50 - 0x1C7F</td>
<td>Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>Osmanya</td>
<td>0x10480 - 0x104AF</td>
<td>Ebrima, Noto Sans Osmanya</td>
</tr>
<tr>
<td>PhagsPa</td>
<td>0xA840 - 0xA87F</td>
<td>Phagspa, Microsoft PhagsPa, Noto Sans PhagsPa, Arial Unicode MS</td>
</tr>
<tr>
<td>SoraSompeng</td>
<td>0x110D0 - 0x110FF</td>
<td>Nirmala UI, Arial Unicode MS</td>
</tr>
<tr>
<td>TaiLe</td>
<td>0x1950 - 0x197F</td>
<td>Microsoft Tai Le, Arial Unicode MS</td>
</tr>
<tr>
<td>NewTaiLue</td>
<td>0x1980 - 0x19DF</td>
<td>Microsoft New Tai Lue, Arial Unicode MS</td>
</tr>
<tr>
<td>Tifinagh</td>
<td>0x2D30 - 0x2D7F</td>
<td>Ebrima, Arial Unicode MS</td>
</tr>
<tr>
<td>Symbols</td>
<td>0x2000 - 0x27BF<br>
0x2300 - 0x23FF<br>
0xF000 - 0xF104</td>
<td>Segoe UI Symbol, Arial Unicode MS, Wingdings</td>
</tr>
<tr>
<td>Mathematics</td>
<td>0x2200 - 0x2AFF<br>
0x1D400 - 0x1D7FF</td>
<td>Cambria Math, Noto Sans Math, Segoe UI Symbol, Arial Unicode MS</td>
</tr>
<tr>
<td>Emoji</td>
<td>0x1F300 - 0x1FAFF<br>
0xFE0F - 0xFE0F</td>
<td>Segoe UI Emoji, Noto Color Emoji, Arial Unicode MS</td>
</tr>
</table>

N> The .NET PowerPoint Library (Presentation) uses System.Drawing functionalities for PowerPoint to image conversion conversion in .NET Framework applications. And System.Drawing itself uses a fallback font to preserve the Unicode text while drawing the text in the image. So, these Fallback fonts APIs are **not supported in .NET Framework**.
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