Add benchmarks for tga images

src/ImageSharp/Formats/Tga/TgaEncoder.cs

@@ -21,7 +21,7 @@ namespace SixLabors.ImageSharp.Formats.Tga
         /// <summary>
         /// Gets or sets a value indicating whether no compression or run length compression should be used.
         /// </summary>
-        public TgaCompression Compression { get; set; }
+        public TgaCompression Compression { get; set; } = TgaCompression.RunLength;
 
         /// <inheritdoc/>
         public void Encode<TPixel>(Image<TPixel> image, Stream stream)

src/ImageSharp/Formats/Tga/TgaImageTypeExtensions.cs

@@ -30,17 +30,15 @@ namespace SixLabors.ImageSharp.Formats.Tga
         /// <returns>true, if its a valid tga image type.</returns>
         public static bool IsValid(this TgaImageType imageType)
         {
-            byte imageTypeVal = (byte)imageType;
-
-            switch (imageTypeVal)
+            switch (imageType)
             {
-                case 0:
-                case 1:
-                case 2:
-                case 3:
-                case 9:
-                case 10:
-                case 11:
+                case TgaImageType.NoImageData:
+                case TgaImageType.ColorMapped:
+                case TgaImageType.TrueColor:
+                case TgaImageType.BlackAndWhite:
+                case TgaImageType.RleColorMapped:
+                case TgaImageType.RleTrueColor:
+                case TgaImageType.RleBlackAndWhite:
                     return true;
 
                 default:

tests/ImageSharp.Benchmarks/Codecs/DecodeTga.cs

@@ -0,0 +1,42 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+
+using BenchmarkDotNet.Attributes;
+
+using ImageMagick;
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Tests;
+using SixLabors.Primitives;
+
+namespace SixLabors.ImageSharp.Benchmarks.Codecs
+{
+    [Config(typeof(Config.ShortClr))]
+    public class DecodeTga : BenchmarkBase
+    {
+        private string TestImageFullPath => Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.TestImage);
+
+        [Params(TestImages.Tga.Bit24)]
+        public string TestImage { get; set; }
+
+        [Benchmark(Baseline = true, Description = "ImageMagick Tga")]
+        public Size TgaImageMagick()
+        {
+            using (var magickImage = new MagickImage(this.TestImageFullPath))
+            {
+                return new Size(magickImage.Width, magickImage.Height);
+            }
+        }
+
+        [Benchmark(Description = "ImageSharp Tga")]
+        public Size TgaCore()
+        {
+            using (var image = Image.Load<Rgba32>(this.TestImageFullPath))
+            {
+                return new Size(image.Width, image.Height);
+            }
+        }
+    }
+}

tests/ImageSharp.Benchmarks/Codecs/EncodeTga.cs

@@ -0,0 +1,54 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using System.IO;
+
+using BenchmarkDotNet.Attributes;
+
+using ImageMagick;
+
+using SixLabors.ImageSharp.PixelFormats;
+using SixLabors.ImageSharp.Tests;
+
+namespace SixLabors.ImageSharp.Benchmarks.Codecs
+{
+    [Config(typeof(Config.ShortClr))]
+    public class EncodeTga : BenchmarkBase
+    {
+        private MagickImage tgaMagick;
+        private Image<Rgba32> tgaCore;
+
+        private string TestImageFullPath => Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, this.TestImage);
+
+        [Params(TestImages.Tga.Bit24)]
+        public string TestImage { get; set; }
+
+        [GlobalSetup]
+        public void ReadImages()
+        {
+            if (this.tgaCore == null)
+            {
+                this.tgaCore = Image.Load<Rgba32>(TestImageFullPath);
+                this.tgaMagick = new MagickImage(this.TestImageFullPath);
+            }
+        }
+
+        [Benchmark(Baseline = true, Description = "Magick Tga")]
+        public void BmpSystemDrawing()
+        {
+            using (var memoryStream = new MemoryStream())
+            {
+                this.tgaMagick.Write(memoryStream, MagickFormat.Tga);
+            }
+        }
+
+        [Benchmark(Description = "ImageSharp Tga")]
+        public void BmpCore()
+        {
+            using (var memoryStream = new MemoryStream())
+            {
+                this.tgaCore.SaveAsBmp(memoryStream);
+            }
+        }
+    }
+}

tests/ImageSharp.Benchmarks/ImageSharp.Benchmarks.csproj

@@ -16,6 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" />
     <PackageReference Include="BenchmarkDotNet" />
     <PackageReference Include="Colourful" />
     <PackageReference Include="SixLabors.Shapes.Text" />