994481: Added Sample for add custom stamp annotation without Blurriness

Annotations/Stamp_blur_Solution/App.xaml

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+<Application x:Class="Stamp_blur_Solution.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:Stamp_blur_Solution"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+
+    </Application.Resources>
+</Application>

Annotations/Stamp_blur_Solution/App.xaml.cs

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+using System.Configuration;
+using System.Data;
+using System.Windows;
+
+namespace Stamp_blur_Solution
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+
+}

Annotations/Stamp_blur_Solution/AssemblyInfo.cs

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+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None,            //where theme specific resource dictionaries are located
+                                                //(used if a resource is not found in the page,
+                                                // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly   //where the generic resource dictionary is located
+                                                //(used if a resource is not found in the page,
+                                                // app, or any theme specific resource dictionaries)
+)]

Annotations/Stamp_blur_Solution/MainWindow.xaml

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+<Window x:Class="Stamp_blur_Solution.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:Stamp_blur_Solution" xmlns:PdfViewer="clr-namespace:Syncfusion.Windows.PdfViewer;assembly=Syncfusion.PdfViewer.WPF"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <RowDefinition Height="*"/>
+        </Grid.RowDefinitions>
+        <Button Content="Button" HorizontalAlignment="Left" Margin="10" Grid.Row="0" VerticalAlignment="Top" Click="Button_Click"/>
+        <PdfViewer:PdfViewerControl x:Name="PDFViewer" Grid.Row ="1"/>
+    </Grid>
+</Window>

Annotations/Stamp_blur_Solution/MainWindow.xaml.cs

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+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Windows.PdfViewer;
+using System.Drawing;
+using System.IO;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media.Imaging;
+
+namespace Stamp_blur_Solution
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+            PDFViewer.Load("../../../Data/Input.pdf");
+        }
+        private void Button_Click(object sender, RoutedEventArgs e)
+        {
+            var unitConvertor = new PdfUnitConvertor();
+
+            // Stamp properties
+            int SX = (int)unitConvertor.ConvertToPixels(125, PdfGraphicsUnit.Point);
+            int SY = (int)unitConvertor.ConvertToPixels(108, PdfGraphicsUnit.Point);
+            string StampNo = "01";
+            int StampSize = 100;
+
+            int StampWidth = (int)unitConvertor.ConvertToPixels(20, PdfGraphicsUnit.Point);
+            int StampHeight = (int)unitConvertor.ConvertToPixels(20, PdfGraphicsUnit.Point);
+
+            // 1. Create a high-resolution Bitmap for the custom stamp
+            using (var customStampBitmap = new Bitmap(StampSize, StampSize))
+            {
+                using (Graphics g = Graphics.FromImage(customStampBitmap))
+                {
+                    g.Clear(Color.Transparent);
+                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
+                    g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
+
+                    // Draw ellipse
+                    using (var pen = new Pen(Color.Red, 3))
+                    {
+                        g.DrawEllipse(pen, 3, 3, StampSize - 6, StampSize - 6);
+                    }
+
+                    // Draw stamp number text (centered)
+                    using (var font = new Font("Helvetica", 28))
+                    {
+                        SizeF textSize = g.MeasureString(StampNo, font);
+                        var textPoint = new System.Drawing.PointF(
+                            (StampSize - textSize.Width) / 2f,
+                            (StampSize - textSize.Height) / 2f);
+                        g.DrawString(StampNo, font, Brushes.Red, textPoint);
+                    }
+                }
+
+                // 2. Convert Bitmap to BitmapImage for WPF PdfViewer
+                BitmapImage bitmapImage;
+                using (var ms = new MemoryStream())
+                {
+                    customStampBitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
+                    ms.Position = 0;
+
+                    bitmapImage = new BitmapImage();
+                    bitmapImage.BeginInit();
+                    bitmapImage.StreamSource = ms;
+                    bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
+                    bitmapImage.EndInit();
+                }
+
+                // 3. Create WPF Image control
+                var stampImage = new System.Windows.Controls.Image
+                {
+                    Source = bitmapImage
+                };
+
+                // 4. Create PdfStampAnnotation
+                var stampAnnotation = new PdfStampAnnotation(stampImage);
+
+                // 5. Define position and size for the stamp in PDF
+                var position = new System.Windows.Point(SX, SY);
+                var stampSizeObj = new System.Drawing.Size(StampWidth, StampHeight);
+
+                // 6. Add the custom image stamp to the PDF viewer
+                // NOTE: Ensure 'pdfViewer' is your PdfViewerControl instance defined in XAML.
+                PDFViewer.AddStamp(stampAnnotation, 1, position, stampSizeObj);
+            }
+        }
+
+    }
+}

Annotations/Stamp_blur_Solution/Stamp_blur_Solution.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<OutputType>WinExe</OutputType>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Syncfusion.PdfViewer.WPF" Version="*" />
+		<PackageReference Include="System.Drawing.Common" Version="10.0.1" />
+	</ItemGroup>
+	<Import Project="targets\MultiTargeting.targets" />
+</Project>

Annotations/Stamp_blur_Solution/Stamp_blur_Solution.slnx

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+<Solution>
+  <Project Path="Stamp_blur_Solution.csproj" />
+</Solution>

Annotations/Stamp_blur_Solution/targets/MultiTargeting.targets

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+<Project>
+  <PropertyGroup>
+    <TargetFrameworks>net462;net8.0-windows;net9.0-windows;net10.0-windows</TargetFrameworks>
+    <UseWPF>true</UseWPF>
+    <GenerateAssemblyInfo>False</GenerateAssemblyInfo>
+    <GenerateDocumentationFile>True</GenerateDocumentationFile>
+    <EnableDefaultItems>True</EnableDefaultItems>
+	<EnableDefaultEmbeddedResourceItems>True</EnableDefaultEmbeddedResourceItems>	
+  </PropertyGroup>
+</Project>