Task-935631-How to draw signature field in the rotated PDF document

Digital Signature/Drawing-Signature-Fields-in-Rotated-PDF-Documents/Drawing-Signature-Fields-in-Rotated-PDF-Documents.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.13.35617.110 d17.13
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Drawing-Signature-Fields-in-Rotated-PDF-Documents", "Drawing-Signature-Fields-in-Rotated-PDF-Documents\Drawing-Signature-Fields-in-Rotated-PDF-Documents.csproj", "{DED69A8E-0D66-4E3A-BD90-F5EE9F2BD5C6}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{DED69A8E-0D66-4E3A-BD90-F5EE9F2BD5C6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DED69A8E-0D66-4E3A-BD90-F5EE9F2BD5C6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DED69A8E-0D66-4E3A-BD90-F5EE9F2BD5C6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DED69A8E-0D66-4E3A-BD90-F5EE9F2BD5C6}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {7BE57722-9807-4418-9F64-8BCD78D871A0}
+	EndGlobalSection
+EndGlobal

Digital Signature/Drawing-Signature-Fields-in-Rotated-PDF-Documents/Drawing-Signature-Fields-in-Rotated-PDF-Documents/Drawing-Signature-Fields-in-Rotated-PDF-Documents.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Drawing_Signature_Fields_in_Rotated_PDF_Documents</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Digital Signature/Drawing-Signature-Fields-in-Rotated-PDF-Documents/Drawing-Signature-Fields-in-Rotated-PDF-Documents/Program.cs

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+using Syncfusion.Pdf;
+using System.IO;
+using Syncfusion.Pdf.Parsing;
+using Syncfusion.Drawing;
+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Pdf.Security;
+
+internal class Program
+{
+    static void Main(string[] args)
+    {
+        //Open the Word document file stream.
+        using (FileStream inputStream = new FileStream(Path.GetFullPath(@"Data/TestPDF.pdf"), FileMode.Open, FileAccess.Read))
+        {
+
+            PdfLoadedDocument pdfLoadedDocument = new PdfLoadedDocument(inputStream);
+
+            PdfLoadedPage ldPage = pdfLoadedDocument.Pages[3] as PdfLoadedPage;
+
+            //Create a certificate instance from a PFX file with a private key.
+            FileStream certificateStream = new FileStream(Path.GetFullPath(@"Data/PDF.pfx"), FileMode.Open, FileAccess.Read);
+            PdfCertificate pdfCert = new PdfCertificate(certificateStream, "password123");
+
+            PdfSignature signature = new PdfSignature(pdfLoadedDocument, ldPage, pdfCert, "Signature1");
+
+            RectangleF bounds = new RectangleF(new PointF(20, 20), new SizeF(240, 70));
+
+
+            signature.Bounds = GetRelativeBounds(ldPage, bounds);
+
+            PdfGraphics graphics = signature.Appearance.Normal.Graphics;
+
+            FileStream imageStream = new FileStream(Path.GetFullPath(@"Data/TestImage.png"), FileMode.Open, FileAccess.Read);
+            //Set an image for signature field.
+            PdfBitmap signatureImage = new PdfBitmap(imageStream);
+
+            RotateSignatureAppearance(signatureImage, signature.Appearance.Normal.Graphics, ldPage.Rotation, signature.Bounds);
+
+            using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Output.pdf"), FileMode.Create, FileAccess.ReadWrite))
+            {
+                //Save the PDF document to file stream.
+                pdfLoadedDocument.Save(outputFileStream);
+            }
+            //Closes the document 
+            pdfLoadedDocument.Close(true);
+
+        }
+    }
+    private static RectangleF GetRelativeBounds(PdfLoadedPage page, RectangleF bounds)
+    {
+        SizeF pagesize = page.Size;
+        RectangleF rectangle = bounds;
+
+        if (page.Rotation == PdfPageRotateAngle.RotateAngle90)
+        {
+            rectangle.X = bounds.Y;
+            rectangle.Y = pagesize.Height - ((bounds.X + bounds.Width));
+            rectangle.Width = bounds.Height;
+            rectangle.Height = bounds.Width;
+        }
+        else if (page.Rotation == PdfPageRotateAngle.RotateAngle270)
+        {
+            rectangle.Y = bounds.X;
+            rectangle.X = pagesize.Width - (bounds.Y + bounds.Height);
+            rectangle.Width = bounds.Height;
+            rectangle.Height = bounds.Width;
+        }
+        else if (page.Rotation == PdfPageRotateAngle.RotateAngle180)
+        {
+            rectangle.X = pagesize.Width - (bounds.X + bounds.Width);
+            rectangle.Y = pagesize.Height - (bounds.Y + bounds.Height);
+        }
+        return rectangle;
+    }
+
+    private static void RotateSignatureAppearance(PdfImage image, PdfGraphics graphics, PdfPageRotateAngle angle, RectangleF bounds)
+    {
+        graphics.Save();
+
+        if (angle == PdfPageRotateAngle.RotateAngle90)
+        {
+            graphics.TranslateTransform(0, bounds.Height);
+            graphics.RotateTransform(-90);
+            graphics.DrawImage(image, new RectangleF(0, 0, bounds.Height, bounds.Width));
+        }
+        else if (angle == PdfPageRotateAngle.RotateAngle180)
+        {
+            graphics.TranslateTransform(bounds.Width, bounds.Height);
+            graphics.RotateTransform(-180);
+            graphics.DrawImage(image, new RectangleF(0, 0, bounds.Width, bounds.Height));
+        }
+        else if (angle == PdfPageRotateAngle.RotateAngle270)
+        {
+            graphics.TranslateTransform(bounds.Width, 0);
+            graphics.RotateTransform(-270);
+            graphics.DrawImage(image, new RectangleF(0, 0, bounds.Height, bounds.Width));
+        }
+        else
+        {
+            graphics.DrawImage(image, new RectangleF(0, 0, bounds.Width, bounds.Height));
+        }
+        graphics.Restore();
+    }
+
+}
+