How to sign TIF file with Round Stamp

GroupDocs.Signature makes it easy for .NET developers to add Round stamps to TIF files within their applications by implementing a few easy steps.

Create new instance of Signature class and pass source TIF document path as a constructor parameter.
Instantiate the StampSignOptions object with required text and set EncodeType property to Round.
Call Sign method of Signature class and pass output TIF file name with StampSignOptions to it.
Analyze SignResult result to check newly created signatures if needed.

System Requirements

GroupDocs.Signature for .NET APIs are supported on all major platforms and operating systems. Before executing the code below, please make sure that you have the following prerequisites installed on your system.

Operating Systems: Microsoft Windows, Linux, MacOS
Development Environments: Visual Studio, Xamarin, MonoDevelop
Frameworks: .NET Framework, .NET Standard, .NET Core, Mono
Download the latest version of GroupDocs.Signature for .NET from NuGet

using (Signature signature = new Signature("sample.tif"))
{
    // Setup round stamp appearance - size, position at document page, font size, color etc.
    StampSignOptions signOptions = new StampSignOptions
    {
        StampType = StampTypes.Round,
        Height = 300,
        Width = 300,
        VerticalAlignment = VerticalAlignment.Center,
        HorizontalAlignment = HorizontalAlignment.Left,
        Background = new Background() { Color = Color.DarkOrange, Transparency = 0.5 },
        ImageFilePath = "handwrite_signature.jpg",
    };

    // Add signature outer line
    signOptions.OuterLines.Add(
        new StampLine
        {
            Text = "* Mr. John Smith *",
            TextRepeatType = StampTextRepeatType.FullTextRepeat,
            Font = new SignatureFont() { Size = 12, FamilyName = "Arial" },
            Height = 30,
            TextBottomIntent = 6,
            TextColor = Color.WhiteSmoke,
            BackgroundColor = Color.DarkSlateBlue
        }
    );

    // Sign TIF file and save result 
    signature.Sign("signed.tif", options);
}