Use magick Reference decoder

src/ImageSharp/Formats/Exr/Compression/Compressors/ZipExrCompressor.cs

@@ -11,7 +11,7 @@ internal class ZipExrCompressor : ExrBaseCompressor
 {
     private readonly DeflateCompressionLevel compressionLevel;
 
-    private readonly MemoryStream memoryStream = new();
+    private readonly MemoryStream memoryStream;
 
     private readonly System.Buffers.IMemoryOwner<byte> buffer;
 
@@ -20,6 +20,7 @@ internal class ZipExrCompressor : ExrBaseCompressor
     {
         this.compressionLevel = compressionLevel;
         this.buffer = allocator.Allocate<byte>((int)bytesPerBlock);
+        this.memoryStream = new();
     }
 
     /// <inheritdoc/>

src/ImageSharp/Formats/Exr/ExrDecoderCore.cs

@@ -53,7 +53,7 @@ internal sealed class ExrDecoderCore : ImageDecoderCore
         : base(options.GeneralOptions)
     {
         this.configuration = options.GeneralOptions.Configuration;
-        this.memoryAllocator = this.configuration.MemoryAllocator;        
+        this.memoryAllocator = this.configuration.MemoryAllocator;
     }
 
     /// <summary>

tests/ImageSharp.Tests/Formats/Exr/ExrEncoderTests.cs

@@ -19,17 +19,17 @@ public class ExrEncoderTests
     [Theory]
     [WithFile(TestImages.Exr.Uncompressed, PixelTypes.Rgba32)]
     public void ExrEncoder_WithNoCompression_Works<TPixel>(TestImageProvider<TPixel> provider)
-        where TPixel : unmanaged, IPixel<TPixel> => TestExrEncoderCore(provider, "NoCompression", compression: ExrCompression.None, imageDecoder: ExrDecoder.Instance);
+        where TPixel : unmanaged, IPixel<TPixel> => TestExrEncoderCore(provider, "NoCompression", compression: ExrCompression.None);
 
     [Theory]
     [WithFile(TestImages.Exr.Uncompressed, PixelTypes.Rgba32)]
     public void ExrEncoder_WithZipCompression_Works<TPixel>(TestImageProvider<TPixel> provider)
-        where TPixel : unmanaged, IPixel<TPixel> => TestExrEncoderCore(provider, "ZipCompression", compression: ExrCompression.Zip, imageDecoder: ExrDecoder.Instance);
+        where TPixel : unmanaged, IPixel<TPixel> => TestExrEncoderCore(provider, "ZipCompression", compression: ExrCompression.Zip);
 
     [Theory]
     [WithFile(TestImages.Exr.Uncompressed, PixelTypes.Rgba32)]
     public void ExrEncoder_WithZipsCompression_Works<TPixel>(TestImageProvider<TPixel> provider)
-        where TPixel : unmanaged, IPixel<TPixel> => TestExrEncoderCore(provider, "ZipsCompression", compression: ExrCompression.Zips, imageDecoder: ExrDecoder.Instance);
+        where TPixel : unmanaged, IPixel<TPixel> => TestExrEncoderCore(provider, "ZipsCompression", compression: ExrCompression.Zips);
 
     protected static void TestExrEncoderCore<TPixel>(
         TestImageProvider<TPixel> provider,