Issue with Fonts Rendering Artifacts in PDF Conversion (PowerPoint to PDF)

GroupDocs.Conversion App Product Family
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Hello,

I am using GroupDocs conversion java lib to convert PowerPoint files (.pptx) to PDF, but I am encountering an issue where some characters appear with artifacts after the conversion. The text becomes distorted, making it difficult to read.

I am using groupdocs-conversion version 24.12.1 in my Java21 application that is running on Ubuntu 24.04.1 LTS
I installed ttf-mscorefonts on the my ubuntu and I joined the output of fc-list
I am also joining the file I want to convert and the output I have.
The issue is only present in some PowerPoint files, not all of them.
Here is a snippet of the code I am using

        Path inputFilePath = Path.of("src/test/resources/input-sip").resolve("pptx_binaire.pptx");
        Path outputFile = Path.of("src/test/resources/sip").resolve("conversion_result.pdf");
        initializeLicense();
        ConverterSettings converterSettings = new ConverterSettings();
        converterSettings.setFontDirectories(List.of("/usr/share/fonts"));
        PdfConvertOptions pdfOptions = new PdfConvertOptions();
        pdfOptions.getPdfOptions().setPdfFormat(PdfFormats.Default);
        try (InputStream is = new FileInputStream(inputFilePath.toFile()); Converter converter = new Converter(() -> is
                , () -> converterSettings
        )) {
            converter.convert(outputFile.toString(), pdfOptions);
        }

Could you provide guidance on how to resolve this issue? Are there any specific font configurations or dependencies required for Linux environments?
input_pptx_binaire.zip (3,7 Mo)

conversion_result.zip (2,0 Mo)

fc-list-output.zip (10,2 Ko)

Thank you for your help.

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This topic has been moved to the related forum: Issue with Fonts Rendering Artifacts in PDF Conversion (PowerPoint to PDF) - Free Support Forum - groupdocs.com

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