SupernoteSharp

SupernoteSharp is an unofficial library for Supernote paper-like tablet by Ratta (https://supernote.com). It allows exporting Supernote's *.note & *.mark file formats.

SupernoteSharp is multi-platform library build with .NET 6.

Credits

This project is heavily inspired by https://github.com/jya-dev/supernote-tool.

Supported file formats

• *.note file created on Supernote A5X/A6X (firmware Chauvet 2.11.26)
• *.mark pdf annotations created on Supernote A5X/A6X (firmware Chauvet 2.11.26)

Key Features - A5X/A6X models only

• Export *.note/*.mark file structure (metadata)

    using (FileStream fileStream = new FileStream(NOTE_FILE_PATH, FileMode.Open, FileAccess.Read))
    {
        Parser parser = new Parser();
        Metadata metadata = parser.ParseMetadata(fileStream, Policy.Strict);

        // metadata
        string metadataJson = metadata.ToJson();
    }

• Export *.note/*.mark single/all pages to png file format

    using (FileStream fileStream = new FileStream(NOTE_FILE_PATH, FileMode.Open, FileAccess.Read))
    {
        Parser parser = new Parser();
        Notebook notebook = parser.LoadNotebook(fileStream, Policy.Strict);
        ImageConverter converter = new Converter.ImageConverter(notebook, DefaultColorPalette.Grayscale);

        // convert a page to PNG
        Image page_0 = converter.Convert(0, VisibilityOverlay.Default);
        // save the result
        page_0.SaveAsPng(PNG_FILE_LOCATION);

        // convert all pages to PNG
        List<Image> allPages = converter.ConvertAll(VisibilityOverlay.Default);
        // save the result
        ...
    }

• Export *.note/*.mark single/all pages to pdf file format

    using (FileStream fileStream = new FileStream(NOTE_FILE_PATH, FileMode.Open, FileAccess.Read))
    {
        Parser parser = new Parser();
        Notebook notebook = parser.LoadNotebook(fileStream, Policy.Strict);
        PdfConverter converter = new PdfConverter(notebook, DefaultColorPalette.Grayscale);

        // convert a page to PDF
        byte[] page_0 = converter.Convert(0);
        // save the result
        File.WriteAllBytes(PDF_FILE_LOCATION, page_0);

        // convert all pages to PDF and build all links
        // only *.note files supports links
        byte[] allPages = converter.ConvertAll(enableLinks: true);
        // save the result
        ...
    }

• Export *.note/*.mark single/all pages to svg file format

    using (FileStream fileStream = new FileStream(NOTE_FILE_PATH, FileMode.Open, FileAccess.Read))
    {
        Parser parser = new Parser();
        Notebook notebook = parser.LoadNotebook(fileStream, Policy.Strict);
        SvgConverter converter = new Converter.SvgConverter(notebook, DefaultColorPalette.Grayscale);

        // convert a page to SVG
        string page_0 = converter.Convert(0);
        // save the result
        File.WriteAllText(SVG_FILE_LOCATION, page_0);

        // convert all pages to SVG
        List<string> allPages = converter.ConvertAll();
        // save the result
    }

• Export *.note/*.mark single/all pages to vector pdf file format

    using (FileStream fileStream = new FileStream(NOTE_FILE_PATH, FileMode.Open, FileAccess.Read))
    {
        Parser parser = new Parser();
        Notebook notebook = parser.LoadNotebook(fileStream, Policy.Strict);
        PdfConverter converter = new PdfConverter(notebook, DefaultColorPalette.Grayscale);

        // convert a page to vector PDF
        byte[] page_0 = converter.Convert(0, vectorize: true);
        // save the result
        File.WriteAllBytes(PDF_FILE_LOCATION, page_0);

        // convert all pages to vector PDF and build all links
        // only *.note files supports links
        byte[] allPages = converter.ConvertAll(vectorize: true, enableLinks: true);
        // save the result
        ...
    }

• Export all text from realtime recognition *.note to text file format

    using (FileStream fileStream = new FileStream(NOTE_FILE_PATH, FileMode.Open, FileAccess.Read))
    {
        Parser parser = new Parser();
        Notebook notebook = parser.LoadNotebook(fileStream, Policy.Strict);
        TextConverter converter = new TextConverter(notebook, DefaultColorPalette.Grayscale);

        // export the realtime text from a page
        string page_0 = converter.Convert(0);
        // save the result
        File.WriteAllText(TXT_FILE_LOCATION, page_0);
    }

Tested on

• Windows 10 version 22H2 (OS Build 19045.2846)
• Windows 11 version 22H2 (OS Build 22621.1413)

Used Nuget Packages

• SupernoteSharp
  • SixLabors.ImageSharp: https://github.com/SixLabors/ImageSharp
  • VectSharp: https://github.com/arklumpus/VectSharp
  • VectSharp.PDF: https://github.com/arklumpus/VectSharp
  • VectSharp.SVG: https://github.com/arklumpus/VectSharp
  • CsPotrace: https://www.drawing3d.de/Downloads.aspx (Vectorization)
• SupernoteSharpUnitTests
  • SixLabors.ImageSharp: https://github.com/SixLabors/ImageSharp
  • Codeuctivity.ImageSharpCompare: https://github.com/Codeuctivity/ImageSharp.Compare
  • coverlet.collector: https://github.com/coverlet-coverage/coverlet
  • FluentAssertions: https://fluentassertions.com
  • Microsoft.NET.Test.Sdk: https://github.com/microsoft/vstest
  • MSTest.TestAdapter: https://github.com/microsoft/testfx
  • MSTest.TestFramework: https://github.com/microsoft/testfx