QR code with image

Demo-ImageSharp/Demo-ImageSharp.csproj

@@ -16,6 +16,16 @@
     <Company>Codecrete</Company>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Remove="heart.png" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="heart.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Net.Codecrete.QrCodeGenerator" Version="2.*" />
     <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="1.0.0-beta13" />

Demo-ImageSharp/Program.cs

@@ -7,6 +7,8 @@
 // https://opensource.org/licenses/MIT
 //
 
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Processing;
 using System;
 using System.IO;
 
@@ -16,6 +18,13 @@ internal class Program
     {
         // Create a QR code and save it as a PNG.
         internal static void Main()
+        {
+            HelloWorld();
+            QrCodeWithImage();
+        }
+
+
+        internal static void HelloWorld()
         {
             var text = "Hello, world!";
             var filename = "hello-world-QR.png";
@@ -25,5 +34,32 @@ internal static void Main()
 
             Console.WriteLine($"The QR code has been saved as {Path.GetFullPath(filename)}");
         }
+
+        internal static void QrCodeWithImage()
+        {
+            var text = "https://github.com/manuelbl/QrCodeGenerator";
+            var filename = "qr-code-with-image.png";
+            var logoFilename = "heart.png";
+            const float logoWidth = 0.15f; // logo will have 15% the width of the QR code 
+
+            var qr = QrCode.EncodeText(text, QrCode.Ecc.Medium);
+
+            using (var bitmap = qr.ToBitmap(scale: 10, border: 4))
+            using (var logo = Image.Load(logoFilename))
+            {
+                // resize logo
+                var w = (int)Math.Round(bitmap.Width * logoWidth);
+                logo.Mutate(logo => logo.Resize(w, 0));
+
+                // draw logo in center
+                var topLeft = new Point((bitmap.Width - logo.Width) / 2, (bitmap.Height - logo.Height) / 2);
+                bitmap.Mutate(img => img.DrawImage(logo, topLeft, 1));
+
+                // save as PNG
+                bitmap.SaveAsPng(filename);
+            }
+
+            Console.WriteLine($"The QR code has been saved as {Path.GetFullPath(filename)}");
+        }
     }
 }

Demo-ImageSharp/README.md

@@ -2,4 +2,6 @@
 
 This example program shows how to create a QR code and save it as a PNG file using the [ImageSharp](https://github.com/SixLabors/ImageSharp) rasterization library.
 
+Additionally, it demonstrates how to add an image in the center of the QR code.
+
 The use of ImageSharp is recommended if the project already uses ImageSharp.

README.md

@@ -163,4 +163,4 @@ Several example projects are provided:
 
 - [Demo-SkiaSharp](Demo-SkiaSharp): Demonstrates how a QR code can be saved a PNG file, using the SkiaSharp multi-platform raster image library.
 
-- [Demo-ImageSharp](Demo-ImageSharp): Demonstrates how a QR code can be saved a PNG file, using the ImageSharp raster image library.
+- [Demo-ImageSharp](Demo-ImageSharp): Demonstrates how a QR code can be saved a PNG file, using the ImageSharp raster image library. Additionally, a QR code with an image in the center is created.