Replace ImageSharp with Magick.NET in the fixture generator

ImageSharp 4.x / ImageSharp.Drawing 3.x add a build-time license check
that fails Release builds without a Six Labors license key, and the
older 3.x / 2.x line is the last one without it. Magick.NET is Apache
2.0, bundles the native ImageMagick library for win/linux/osx, and
covers every encoder the fixtures need (PNG/BMP/JPG/GIF), so the
generator moves to it instead of carrying a license key.

The checked-in binary fixtures are regenerated with the new encoders;
the rendered shape (square, circle, diagonal stripe, border) is the
same, only the encoded bytes differ.

Assisted-by: Claude:claude-fable-5-1:Claude Code

TestFixtures.Resources/Generate.cs

@@ -29,24 +29,17 @@ using System.Collections.Generic;
 using System.IO;
 using System.Resources;
 
-using SixLabors.ImageSharp;
-using SixLabors.ImageSharp.Drawing.Processing;
-using SixLabors.ImageSharp.Formats;
-using SixLabors.ImageSharp.Formats.Bmp;
-using SixLabors.ImageSharp.Formats.Gif;
-using SixLabors.ImageSharp.Formats.Jpeg;
-using SixLabors.ImageSharp.Formats.Png;
-using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Processing;
+using ImageMagick;
+using ImageMagick.Drawing;
 
 var dir = Path.Combine(AppContext.BaseDirectory, "..", "..", "..", "fixtures");
 dir = Path.GetFullPath(dir);
 Directory.CreateDirectory(dir);
 
-WriteImage(Path.Combine(dir, "logo.png"), new PngEncoder());
-WriteImage(Path.Combine(dir, "logo.bmp"), new BmpEncoder());
-WriteImage(Path.Combine(dir, "logo.jpg"), new JpegEncoder { Quality = 92 });
-WriteImage(Path.Combine(dir, "logo.gif"), new GifEncoder());
+WriteImage(Path.Combine(dir, "logo.png"), MagickFormat.Png);
+WriteImage(Path.Combine(dir, "logo.bmp"), MagickFormat.Bmp);
+WriteImage(Path.Combine(dir, "logo.jpg"), MagickFormat.Jpeg, quality: 92);
+WriteImage(Path.Combine(dir, "logo.gif"), MagickFormat.Gif);
 
 // Multi-frame .ico: 16x16, 32x32, 48x48, each PNG-encoded inside the ICO container so Avalonia
 // can decode the largest frame for preview while a savvy viewer can pick any.
@@ -73,29 +66,35 @@ Console.WriteLine($"Wrote fixtures into {dir}");
 
 // --- helpers ---
 
-static void WriteImage(string path, IImageEncoder encoder, int size = 64)
+static void WriteImage(string path, MagickFormat format, int size = 64, uint quality = 0)
 {
     using var img = RenderShape(size);
-    using var fs = File.Create(path);
-    img.Save(fs, encoder);
+    if (quality > 0)
+        img.Quality = quality;
+    img.Write(path, format);
 }
 
-static Image<Rgba32> RenderShape(int size)
+static MagickImage RenderShape(int size)
 {
-    var img = new Image<Rgba32>(size, size, new Rgba32(0xFF, 0xF6, 0xE5));
-    img.Mutate(ctx => {
+    var img = new MagickImage(new MagickColor("#FFF6E5"), (uint)size, (uint)size);
+    float radius = size * 0.35f;
+    // Drawables is a single fluent command list: stroke/fill settings persist across the
+    // primitives that follow, so each shape resets the ones it does not want.
+    new Drawables()
         // Filled blue circle in the centre.
-        ctx.Fill(new Rgba32(0x33, 0x99, 0xCC),
-            new SixLabors.ImageSharp.Drawing.EllipsePolygon(size / 2f, size / 2f, size * 0.35f));
+        .FillColor(new MagickColor("#3399CC"))
+        .StrokeColor(MagickColors.None)
+        .Ellipse(size / 2.0, size / 2.0, radius, radius, 0, 360)
         // Red diagonal stripe.
-        ctx.DrawLine(new Rgba32(0xCC, 0x33, 0x33),
-            Math.Max(2, size / 16f),
-            new PointF(0, size),
-            new PointF(size, 0));
+        .FillColor(MagickColors.None)
+        .StrokeColor(new MagickColor("#CC3333"))
+        .StrokeWidth(Math.Max(2, size / 16.0))
+        .Line(0, size, size, 0)
         // 1px dark border so the bounds are obvious against any background.
-        ctx.Draw(new Rgba32(0x33, 0x33, 0x33), 1,
-            new RectangleF(0, 0, size - 1, size - 1));
-    });
+        .StrokeColor(new MagickColor("#333333"))
+        .StrokeWidth(1)
+        .Rectangle(0, 0, size - 1, size - 1)
+        .Draw(img);
     return img;
 }
 
@@ -105,13 +104,10 @@ static Image<Rgba32> RenderShape(int size)
 static byte[] BuildIcoOrCur(bool isCursor, int[] sizes)
 {
     var frames = new List<byte[]>(sizes.Length);
-    var pngEncoder = new PngEncoder();
     foreach (var sz in sizes)
     {
         using var img = RenderShape(sz);
-        using var ms = new MemoryStream();
-        img.Save(ms, pngEncoder);
-        frames.Add(ms.ToArray());
+        frames.Add(img.ToByteArray(MagickFormat.Png));
     }
     var fileMs = new MemoryStream();
     var w = new BinaryWriter(fileMs);

TestFixtures.Resources/Generate.csproj

@@ -5,14 +5,13 @@
     <RootNamespace>TestFixtures.Generate</RootNamespace>
     <Nullable>enable</Nullable>
     <!-- This generator runs once to (re)build the binary fixtures and isn't part of the
-         solution's CPM scope; pin SkiaSharp inline so the parent Directory.Packages.props
+         solution's CPM scope; pin the image library inline so the parent Directory.Packages.props
          doesn't need to learn about a one-shot tool. -->
     <ManagePackageVersionsCentrally>false</ManagePackageVersionsCentrally>
   </PropertyGroup>
   <ItemGroup>
-    <!-- ImageSharp covers every encoder we need (PNG/JPG/BMP/GIF) cross-platform; SkiaSharp's
-         encoder list doesn't include BMP/GIF. -->
-    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.11" />
-    <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="2.1.4" />
+    <!-- Magick.NET (Apache 2.0, bundles the ImageMagick native library for win/linux/osx) covers every
+         encoder we need (PNG/JPG/BMP/GIF). SkiaSharp's encoder list doesn't include BMP/GIF. -->
+    <PackageReference Include="Magick.NET-Q8-AnyCPU" Version="14.17.2" />
   </ItemGroup>
 </Project>

TestFixtures.Resources/packages.lock.json

@@ -2,26 +2,19 @@
   "version": 1,
   "dependencies": {
     "net10.0": {
-      "SixLabors.ImageSharp": {
+      "Magick.NET-Q8-AnyCPU": {
         "type": "Direct",
-        "requested": "[3.1.11, )",
-        "resolved": "3.1.11",
-        "contentHash": "JfPLyigLthuE50yi6tMt7Amrenr/fA31t2CvJyhy/kQmfulIBAqo5T/YFUSRHtuYPXRSaUHygFeh6Qd933EoSw=="
-      },
-      "SixLabors.ImageSharp.Drawing": {
-        "type": "Direct",
-        "requested": "[2.1.4, )",
-        "resolved": "2.1.4",
-        "contentHash": "p4VwtAABggDUhUS5zXldCZHVGfjJl76+SrBHY4biNQ8+890igFK6RL87qIv9GqvEjMcYOar1sPkf2iMQ6uq9/g==",
+        "requested": "[14.17.2, )",
+        "resolved": "14.17.2",
+        "contentHash": "AIvpBH4fvP3/NUwvWsVj9SxAA6hrU4p5/RNfColyrDn4jipl7loR6y4ZgYLXfBQgjmSEc7m2D2DbkWMnZt+brg==",
         "dependencies": {
-          "SixLabors.Fonts": "2.0.4",
-          "SixLabors.ImageSharp": "3.1.5"
+          "Magick.NET.Core": "14.17.2"
         }
       },
-      "SixLabors.Fonts": {
+      "Magick.NET.Core": {
         "type": "Transitive",
-        "resolved": "2.0.4",
-        "contentHash": "4+NKz8W36injp98lmmM07ncp08HAK8c6FZz8vLoKxRPfJeEVWpBHlLYEbQa5rcqKKYqxUv/RVCrb8XcPhfMKUQ=="
+        "resolved": "14.17.2",
+        "contentHash": "KKvR6eBUcfgkZpfHfN/UKRcK/FjHW6NXXoRRf5HJdhFk5bYLEEFuKu6op0zfNo6Msah51Yw42p599pz3A0CDQQ=="
       }
     }
   }