Update to net8

.github/workflows/build-and-test.yml

@@ -19,42 +19,23 @@ jobs:
           - ${{ contains(github.event.pull_request.labels.*.name, 'arch:arm32') || contains(github.event.pull_request.labels.*.name, 'arch:arm64') }}
         options:
           - os: ubuntu-latest
-            framework: net7.0
-            sdk: 7.0.x
-            sdk-preview: true
+            framework: net8.0
+            sdk: 8.0.x
             runtime: -x64
             codecov: false
           - os: macos-latest
-            framework: net7.0
-            sdk: 7.0.x
-            sdk-preview: true
+            framework: net8.0
+            sdk: 8.0.x
             runtime: -x64
             codecov: false
           - os: windows-latest
-            framework: net7.0
-            sdk: 7.0.x
-            sdk-preview: true
+            framework: net8.0
+            sdk: 8.0.x
             runtime: -x64
             codecov: false
           - os: buildjet-4vcpu-ubuntu-2204-arm
-            framework: net7.0
-            sdk: 7.0.x
-            sdk-preview: true
-            runtime: -x64
-            codecov: false
-          - os: ubuntu-latest
-            framework: net6.0
-            sdk: 6.0.x
-            runtime: -x64
-            codecov: false
-          - os: macos-latest
-            framework: net6.0
-            sdk: 6.0.x
-            runtime: -x64
-            codecov: false
-          - os: windows-latest
-            framework: net6.0
-            sdk: 6.0.x
+            framework: net8.0
+            sdk: 8.0.x
             runtime: -x64
             codecov: false
         exclude:
@@ -111,14 +92,14 @@ jobs:
         uses: actions/setup-dotnet@v3
         with:
           dotnet-version: |
-            6.0.x
+            8.0.x
 
       - name: DotNet Setup Preview
         if: ${{ matrix.options.sdk-preview == true }}
         uses: actions/setup-dotnet@v3
         with:
           dotnet-version: |
-            7.0.x
+            8.0.x
 
       - name: DotNet Build
         if: ${{ matrix.options.sdk-preview != true }}

.github/workflows/code-coverage.yml

@@ -10,7 +10,7 @@ jobs:
       matrix:
         options:
           - os: ubuntu-latest
-            framework: net6.0
+            framework: net8.0
             runtime: -x64
             codecov: true
 
@@ -58,7 +58,7 @@ jobs:
         uses: actions/setup-dotnet@v3
         with:
           dotnet-version: |
-            6.0.x
+            8.0.x
 
       - name: DotNet Build
         shell: pwsh

README.md

@@ -21,7 +21,7 @@ Designed to simplify image processing, ImageSharp brings you an incredibly power
 
 ImageSharp is designed from the ground up to be flexible and extensible. The library provides API endpoints for common image processing operations and the building blocks to allow for the development of additional operations.
 
-Built against [.NET 6](https://docs.microsoft.com/en-us/dotnet/standard/net-standard), ImageSharp can be used in device, cloud, and embedded/IoT scenarios.
+Built against [.NET 8](https://docs.microsoft.com/en-us/dotnet/standard/net-standard), ImageSharp can be used in device, cloud, and embedded/IoT scenarios.
 
 
 ## License
@@ -64,7 +64,7 @@ If you prefer, you can compile ImageSharp yourself (please do and help!)
 
 - Using [Visual Studio 2022](https://visualstudio.microsoft.com/vs/)
   - Make sure you have the latest version installed
-  - Make sure you have [the .NET 7 SDK](https://www.microsoft.com/net/core#windows) installed
+  - Make sure you have [the .NET 8 SDK](https://www.microsoft.com/net/core#windows) installed
 
 Alternatively, you can work from command line and/or with a lightweight editor on **both Linux/Unix and Windows**:
 

src/ImageSharp.ruleset

@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RuleSet Name="ImageSharp" ToolsVersion="17.0">
   <Include Path="..\shared-infrastructure\sixlabors.ruleset" Action="Default" />
+   <Rules AnalyzerId="Microsoft.CodeAnalysis.CSharp.NetAnalyzers" RuleNamespace="Microsoft.CodeAnalysis.CSharp.NetAnalyzers">
+    <Rule Id="CA1859" Action="None" />
+  </Rules>
   <Rules AnalyzerId="StyleCop.Analyzers" RuleNamespace="StyleCop.Analyzers">
     <Rule Id="SA1011" Action="None" />
   </Rules>
-</RuleSet>
+</RuleSet>

src/ImageSharp/Advanced/ParallelRowIterator.Wrappers.cs

@@ -51,7 +51,7 @@ public void Invoke(int i)
             for (int y = yMin; y < yMax; y++)
             {
                 // Skip the safety copy when invoking a potentially impure method on a readonly field
-                Unsafe.AsRef(this.action).Invoke(y);
+                Unsafe.AsRef(in this.action).Invoke(y);
             }
         }
     }
@@ -102,7 +102,7 @@ public void Invoke(int i)
 
             for (int y = yMin; y < yMax; y++)
             {
-                Unsafe.AsRef(this.action).Invoke(y, span);
+                Unsafe.AsRef(in this.action).Invoke(y, span);
             }
         }
     }

src/ImageSharp/Advanced/ParallelRowIterator.cs

@@ -58,7 +58,7 @@ public static void IterateRows<T>(
         {
             for (int y = top; y < bottom; y++)
             {
-                Unsafe.AsRef(operation).Invoke(y);
+                Unsafe.AsRef(in operation).Invoke(y);
             }
 
             return;
@@ -118,7 +118,7 @@ public static void IterateRows<T, TBuffer>(
         int maxSteps = DivideCeil(width * (long)height, parallelSettings.MinimumPixelsProcessedPerTask);
         int numOfSteps = Math.Min(parallelSettings.MaxDegreeOfParallelism, maxSteps);
         MemoryAllocator allocator = parallelSettings.MemoryAllocator;
-        int bufferLength = Unsafe.AsRef(operation).GetRequiredBufferLength(rectangle);
+        int bufferLength = Unsafe.AsRef(in operation).GetRequiredBufferLength(rectangle);
 
         // Avoid TPL overhead in this trivial case:
         if (numOfSteps == 1)
@@ -128,7 +128,7 @@ public static void IterateRows<T, TBuffer>(
 
             for (int y = top; y < bottom; y++)
             {
-                Unsafe.AsRef(operation).Invoke(y, span);
+                Unsafe.AsRef(in operation).Invoke(y, span);
             }
 
             return;
@@ -245,15 +245,15 @@ public static void IterateRowIntervals<T, TBuffer>(
         int maxSteps = DivideCeil(width * (long)height, parallelSettings.MinimumPixelsProcessedPerTask);
         int numOfSteps = Math.Min(parallelSettings.MaxDegreeOfParallelism, maxSteps);
         MemoryAllocator allocator = parallelSettings.MemoryAllocator;
-        int bufferLength = Unsafe.AsRef(operation).GetRequiredBufferLength(rectangle);
+        int bufferLength = Unsafe.AsRef(in operation).GetRequiredBufferLength(rectangle);
 
         // Avoid TPL overhead in this trivial case:
         if (numOfSteps == 1)
         {
             var rows = new RowInterval(top, bottom);
             using IMemoryOwner<TBuffer> buffer = allocator.Allocate<TBuffer>(bufferLength);
 
-            Unsafe.AsRef(operation).Invoke(in rows, buffer.Memory.Span);
+            Unsafe.AsRef(in operation).Invoke(in rows, buffer.Memory.Span);
 
             return;
         }

src/ImageSharp/Common/Helpers/DebugGuard.cs

@@ -33,10 +33,12 @@ public static void IsTrue(bool target, string message)
     [Conditional("DEBUG")]
     public static void NotDisposed(bool isDisposed, string objectName)
     {
+#pragma warning disable CA1513
         if (isDisposed)
         {
             throw new ObjectDisposedException(objectName);
         }
+#pragma warning restore CA1513
     }
 
     /// <summary>

src/ImageSharp/Common/Helpers/Numerics.cs

@@ -908,25 +908,6 @@ public static int ReduceSum(Vector256<int> accumulator)
         return Sse2.ConvertToInt32(vsum);
     }
 
-    /// <summary>
-    /// Reduces elements of the vector into one sum.
-    /// </summary>
-    /// <param name="accumulator">The accumulator to reduce.</param>
-    /// <returns>The sum of all elements.</returns>
-    [MethodImpl(InliningOptions.ShortMethod)]
-    public static int ReduceSumArm(Vector128<uint> accumulator)
-    {
-        if (AdvSimd.Arm64.IsSupported)
-        {
-            Vector64<uint> sum = AdvSimd.Arm64.AddAcross(accumulator);
-            return (int)AdvSimd.Extract(sum, 0);
-        }
-
-        Vector128<ulong> sum2 = AdvSimd.AddPairwiseWidening(accumulator);
-        Vector64<uint> sum3 = AdvSimd.Add(sum2.GetLower().AsUInt32(), sum2.GetUpper().AsUInt32());
-        return (int)AdvSimd.Extract(sum3, 0);
-    }
-
     /// <summary>
     /// Reduces even elements of the vector into one sum.
     /// </summary>

src/ImageSharp/Common/Helpers/SimdUtils.HwIntrinsics.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
+using System.Diagnostics.CodeAnalysis;
 using System.Numerics;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -59,7 +60,7 @@ public static Vector256<uint> PermuteMaskShiftAlpha8x32() => Vector256.Create(
         public static void Shuffle4Reduce(
             ref ReadOnlySpan<float> source,
             ref Span<float> dest,
-            byte control)
+            [ConstantExpected] byte control)
         {
             if (Avx.IsSupported || Sse.IsSupported)
             {
@@ -218,7 +219,7 @@ public static void Shuffle4Slice3Reduce(
         private static void Shuffle4(
             ReadOnlySpan<float> source,
             Span<float> dest,
-            byte control)
+            [ConstantExpected] byte control)
         {
             if (Avx.IsSupported)
             {

src/ImageSharp/Common/Helpers/SimdUtils.Shuffle.cs

@@ -2,6 +2,7 @@
 // Licensed under the Six Labors Split License.
 
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
@@ -20,7 +21,7 @@ internal static partial class SimdUtils
     public static void Shuffle4(
         ReadOnlySpan<float> source,
         Span<float> dest,
-        byte control)
+        [ConstantExpected] byte control)
     {
         VerifyShuffle4SpanInput(source, dest);
 

src/ImageSharp/Configuration.cs

@@ -87,10 +87,7 @@ public int StreamProcessingBufferSize
         get => this.streamProcessingBufferSize;
         set
         {
-            if (value <= 0)
-            {
-                throw new ArgumentOutOfRangeException(nameof(this.StreamProcessingBufferSize));
-            }
+            ArgumentOutOfRangeException.ThrowIfNegativeOrZero(value);
 
             this.streamProcessingBufferSize = value;
         }

src/ImageSharp/Formats/AnimatedImageFrameMetadata.cs

@@ -2,6 +2,7 @@
 // Licensed under the Six Labors Split License.
 
 namespace SixLabors.ImageSharp.Formats;
+
 internal class AnimatedImageFrameMetadata
 {
     /// <summary>

src/ImageSharp/Formats/AnimatedImageMetadata.cs

@@ -2,6 +2,7 @@
 // Licensed under the Six Labors Split License.
 
 namespace SixLabors.ImageSharp.Formats;
+
 internal class AnimatedImageMetadata
 {
     /// <summary>

src/ImageSharp/Formats/ImageFormatManager.cs

@@ -83,10 +83,7 @@ public void AddImageFormat(IImageFormat format)
 
         lock (HashLock)
         {
-            if (!this.imageFormats.Contains(format))
-            {
-                this.imageFormats.Add(format);
-            }
+            this.imageFormats.Add(format);
         }
     }
 

src/ImageSharp/Formats/Jpeg/JpegEncoderCore.cs

@@ -176,10 +176,7 @@ private void WriteJfifApplicationHeader(ImageMetadata meta, Span<byte> buffer)
     /// <exception cref="ArgumentNullException"><paramref name="tableConfigs"/> is <see langword="null"/>.</exception>
     private void WriteDefineHuffmanTables(JpegHuffmanTableConfig[] tableConfigs, HuffmanScanEncoder scanEncoder, Span<byte> buffer)
     {
-        if (tableConfigs is null)
-        {
-            throw new ArgumentNullException(nameof(tableConfigs));
-        }
+        ArgumentNullException.ThrowIfNull(tableConfigs);
 
         int markerlen = 2;
 

src/ImageSharp/Formats/Png/PngDecoderCore.cs

@@ -2039,8 +2039,7 @@ private static bool TryReadTextKeyword(ReadOnlySpan<byte> keywordBytes, out stri
         // Keywords should not be empty or have leading or trailing whitespace.
         name = PngConstants.Encoding.GetString(keywordBytes);
         return !string.IsNullOrWhiteSpace(name)
-            && !name.StartsWith(" ", StringComparison.Ordinal)
-            && !name.EndsWith(" ", StringComparison.Ordinal);
+            && !name.StartsWith(' ') && !name.EndsWith(' ');
     }
 
     private static bool IsXmpTextData(ReadOnlySpan<byte> keywordBytes)

src/ImageSharp/Formats/Qoi/QoiDecoder.cs

@@ -4,6 +4,7 @@
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Formats.Qoi;
+
 internal class QoiDecoder : ImageDecoder
 {
     private QoiDecoder()