From dc6871cfc350da37b8f47acc2a680443392939b7 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Wed, 3 Jul 2024 22:02:23 +1000
Subject: [PATCH] Add explicit AOT seeding for SpectralConverter

---
 src/ImageSharp/Advanced/AotCompilerTools.cs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/ImageSharp/Advanced/AotCompilerTools.cs b/src/ImageSharp/Advanced/AotCompilerTools.cs
index 61ec85b47a..0d5faabe18 100644
--- a/src/ImageSharp/Advanced/AotCompilerTools.cs
+++ b/src/ImageSharp/Advanced/AotCompilerTools.cs
@@ -10,11 +10,13 @@ using SixLabors.ImageSharp.Formats.Bmp;
 using SixLabors.ImageSharp.Formats.Gif;
 using SixLabors.ImageSharp.Formats.Jpeg;
 using SixLabors.ImageSharp.Formats.Jpeg.Components;
+using SixLabors.ImageSharp.Formats.Jpeg.Components.Decoder;
 using SixLabors.ImageSharp.Formats.Pbm;
 using SixLabors.ImageSharp.Formats.Png;
 using SixLabors.ImageSharp.Formats.Qoi;
 using SixLabors.ImageSharp.Formats.Tga;
 using SixLabors.ImageSharp.Formats.Tiff;
+using SixLabors.ImageSharp.Formats.Tiff.Compression.Decompressors;
 using SixLabors.ImageSharp.Formats.Webp;
 using SixLabors.ImageSharp.Memory;
 using SixLabors.ImageSharp.PixelFormats;
@@ -130,6 +132,7 @@ internal static class AotCompilerTools
         AotCompileImageDecoderInternals<TPixel>();
         AotCompileImageEncoders<TPixel>();
         AotCompileImageDecoders<TPixel>();
+        AotCompileSpectralConverter<TPixel>();
         AotCompileImageProcessors<TPixel>();
         AotCompileGenericImageProcessors<TPixel>();
         AotCompileResamplers<TPixel>();
@@ -269,6 +272,17 @@ internal static class AotCompilerTools
         AotCompileImageDecoder<TPixel, TiffDecoder>();
     }
 
+    [Preserve]
+    private static void AotCompileSpectralConverter<TPixel>()
+        where TPixel : unmanaged, IPixel<TPixel>
+    {
+        default(SpectralConverter<TPixel>).GetPixelBuffer(default);
+        default(GrayJpegSpectralConverter<TPixel>).GetPixelBuffer(default);
+        default(RgbJpegSpectralConverter<TPixel>).GetPixelBuffer(default);
+        default(TiffJpegSpectralConverter<TPixel>).GetPixelBuffer(default);
+        default(TiffOldJpegSpectralConverter<TPixel>).GetPixelBuffer(default);
+    }
+
     /// <summary>
     /// This method pre-seeds the <see cref="IImageEncoder"/> in the AoT compiler.
     /// </summary>