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107 lines
3.9 KiB
107 lines
3.9 KiB
// Copyright (c) Six Labors.
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// Licensed under the Apache License, Version 2.0.
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using System.Drawing.Imaging;
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using System.IO;
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using BenchmarkDotNet.Attributes;
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using SixLabors.ImageSharp.Formats.Jpeg;
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using SixLabors.ImageSharp.PixelFormats;
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using SixLabors.ImageSharp.Tests;
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using SDImage = System.Drawing.Image;
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namespace SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg
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{
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public class EncodeJpeg
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{
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private const string TestImage = TestImages.Jpeg.BenchmarkSuite.Jpeg420Exif_MidSizeYCbCr;
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private const int EncodingQuality = 100;
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// GDI+ uses 4:2:0 subsampling
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private const JpegSubsample EncodingSubsampling = JpegSubsample.Ratio420;
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// System.Drawing
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private SDImage bmpDrawing;
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private Stream bmpStream;
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private ImageCodecInfo jpegCodec;
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private EncoderParameters encoderParameters;
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// ImageSharp
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private Image<Rgba32> bmpCore;
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private JpegEncoder encoder;
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private MemoryStream destinationStream;
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[GlobalSetup]
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public void ReadImages()
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{
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if (this.bmpStream == null)
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{
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this.bmpStream = File.OpenRead(Path.Combine(TestEnvironment.InputImagesDirectoryFullPath, TestImage));
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this.bmpCore = Image.Load<Rgba32>(this.bmpStream);
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this.bmpCore.Metadata.ExifProfile = null;
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this.encoder = new JpegEncoder { Quality = EncodingQuality, Subsample = EncodingSubsampling };
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this.bmpStream.Position = 0;
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this.bmpDrawing = SDImage.FromStream(this.bmpStream);
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this.jpegCodec = GetEncoder(ImageFormat.Jpeg);
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this.encoderParameters = new EncoderParameters(1);
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// Quality cast to long is necessary
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this.encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, (long)EncodingQuality);
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this.destinationStream = new MemoryStream();
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}
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}
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[GlobalCleanup]
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public void Cleanup()
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{
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this.bmpStream.Dispose();
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this.bmpStream = null;
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this.bmpCore.Dispose();
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this.bmpDrawing.Dispose();
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}
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[Benchmark(Baseline = true, Description = "System.Drawing Jpeg")]
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public void JpegSystemDrawing()
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{
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this.bmpDrawing.Save(this.destinationStream, this.jpegCodec, this.encoderParameters);
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this.destinationStream.Seek(0, SeekOrigin.Begin);
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}
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[Benchmark(Description = "ImageSharp Jpeg")]
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public void JpegCore()
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{
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this.bmpCore.SaveAsJpeg(this.destinationStream, this.encoder);
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this.destinationStream.Seek(0, SeekOrigin.Begin);
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}
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// https://docs.microsoft.com/en-us/dotnet/api/system.drawing.imaging.encoderparameter?redirectedfrom=MSDN&view=net-5.0
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private static ImageCodecInfo GetEncoder(ImageFormat format)
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{
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ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
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foreach (ImageCodecInfo codec in codecs)
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{
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if (codec.FormatID == format.Guid)
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{
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return codec;
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}
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}
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return null;
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}
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}
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}
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/*
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BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19042
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Intel Core i7-6700K CPU 4.00GHz (Skylake), 1 CPU, 8 logical and 4 physical cores
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.NET Core SDK=6.0.100-preview.3.21202.5
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[Host] : .NET Core 3.1.13 (CoreCLR 4.700.21.11102, CoreFX 4.700.21.11602), X64 RyuJIT
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DefaultJob : .NET Core 3.1.13 (CoreCLR 4.700.21.11102, CoreFX 4.700.21.11602), X64 RyuJIT
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| Method | Mean | Error | StdDev | Ratio | RatioSD |
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|---------------------- |---------:|---------:|---------:|------:|--------:|
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| 'System.Drawing Jpeg' | 39.67 ms | 0.774 ms | 0.828 ms | 1.00 | 0.00 |
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| 'ImageSharp Jpeg' | 45.39 ms | 0.415 ms | 0.346 ms | 1.14 | 0.03 |
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*/
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