mirror of https://github.com/SixLabors/ImageSharp
James Jackson-South
8 years ago
committed by
GitHub
GitHub
17 changed files with 522 additions and 257 deletions
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using System.Buffers.Binary; |
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using System.IO; |
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using System.Text; |
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using SixLabors.ImageSharp.Formats.Png; |
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using SixLabors.ImageSharp.PixelFormats; |
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using Xunit; |
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// ReSharper disable InconsistentNaming
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namespace SixLabors.ImageSharp.Tests.Formats.Png |
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{ |
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public partial class PngDecoderTests |
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{ |
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// Contains the png marker, IHDR and pHYs chunks of a 1x1 pixel 32bit png 1 a single black pixel.
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private static readonly byte[] Raw1X1PngIhdrAndpHYs = |
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{ |
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// PNG Identifier
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0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, |
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// IHDR
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0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52, 0x00, |
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0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x08, 0x02, |
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0x00, 0x00, 0x00, |
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// IHDR CRC
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0x90, 0x77, 0x53, 0xDE, |
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// pHYS
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0x00, 0x00, 0x00, 0x09, 0x70, 0x48, 0x59, 0x73, 0x00, |
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0x00, 0x0E, 0xC3, 0x00, 0x00, 0x0E, 0xC3, 0x01, |
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// pHYS CRC
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0xC7, 0x6F, 0xA8, 0x64 |
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}; |
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// Contains the png marker, IDAT and IEND chunks of a 1x1 pixel 32bit png 1 a single black pixel.
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private static readonly byte[] Raw1X1PngIdatAndIend = |
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{ |
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// IDAT
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0x00, 0x00, 0x00, 0x0C, 0x49, 0x44, 0x41, 0x54, 0x18, |
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0x57, 0x63, 0x60, 0x60, 0x60, 0x00, 0x00, 0x00, 0x04, |
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0x00, 0x01, |
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// IDAT CRC
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0x5C, 0xCD, 0xFF, 0x69, |
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// IEND
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0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4E, 0x44, |
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// IEND CRC
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0xAE, 0x42, 0x60, 0x82 |
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}; |
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[Theory] |
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[InlineData((uint)PngChunkType.Header)] // IHDR
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[InlineData((uint)PngChunkType.Palette)] // PLTE
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// [InlineData(PngChunkTypes.Data)] //TODO: Figure out how to test this
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[InlineData((uint)PngChunkType.End)] // IEND
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public void Decode_IncorrectCRCForCriticalChunk_ExceptionIsThrown(uint chunkType) |
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{ |
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string chunkName = GetChunkTypeName(chunkType); |
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using (var memStream = new MemoryStream()) |
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{ |
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WriteHeaderChunk(memStream); |
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WriteChunk(memStream, chunkName); |
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WriteDataChunk(memStream); |
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var decoder = new PngDecoder(); |
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ImageFormatException exception = |
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Assert.Throws<ImageFormatException>(() => decoder.Decode<Rgb24>(null, memStream)); |
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Assert.Equal($"CRC Error. PNG {chunkName} chunk is corrupt!", exception.Message); |
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} |
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} |
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[Theory] |
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[InlineData((uint)PngChunkType.Gamma)] // gAMA
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[InlineData((uint)PngChunkType.PaletteAlpha)] // tRNS
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[InlineData( |
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(uint)PngChunkType.Physical)] // pHYs: It's ok to test physical as we don't throw for duplicate chunks.
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//[InlineData(PngChunkTypes.Text)] //TODO: Figure out how to test this
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public void Decode_IncorrectCRCForNonCriticalChunk_ExceptionIsThrown(uint chunkType) |
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{ |
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string chunkName = GetChunkTypeName(chunkType); |
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using (var memStream = new MemoryStream()) |
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{ |
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WriteHeaderChunk(memStream); |
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WriteChunk(memStream, chunkName); |
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WriteDataChunk(memStream); |
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var decoder = new PngDecoder(); |
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decoder.Decode<Rgb24>(null, memStream); |
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} |
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} |
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private static string GetChunkTypeName(uint value) |
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{ |
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byte[] data = new byte[4]; |
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BinaryPrimitives.WriteUInt32BigEndian(data, value); |
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return Encoding.ASCII.GetString(data); |
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} |
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private static void WriteHeaderChunk(MemoryStream memStream) |
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{ |
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// Writes a 1x1 32bit png header chunk containing a single black pixel
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memStream.Write(Raw1X1PngIhdrAndpHYs, 0, Raw1X1PngIhdrAndpHYs.Length); |
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} |
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private static void WriteChunk(MemoryStream memStream, string chunkName) |
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{ |
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memStream.Write(new byte[] { 0, 0, 0, 1 }, 0, 4); |
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memStream.Write(Encoding.GetEncoding("ASCII").GetBytes(chunkName), 0, 4); |
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memStream.Write(new byte[] { 0, 0, 0, 0, 0 }, 0, 5); |
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} |
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private static void WriteDataChunk(MemoryStream memStream) |
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{ |
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// Writes a 1x1 32bit png data chunk containing a single black pixel
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memStream.Write(Raw1X1PngIdatAndIend, 0, Raw1X1PngIdatAndIend.Length); |
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memStream.Position = 0; |
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} |
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} |
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} |
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@ -0,0 +1,53 @@ |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System; |
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using System.IO; |
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using System.Runtime.InteropServices; |
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using ImageMagick; |
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using SixLabors.ImageSharp.Advanced; |
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using SixLabors.ImageSharp.Formats; |
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using SixLabors.ImageSharp.PixelFormats; |
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namespace SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs |
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{ |
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public class MagickReferenceDecoder : IImageDecoder |
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{ |
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public static MagickReferenceDecoder Instance { get; } = new MagickReferenceDecoder(); |
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public Image<TPixel> Decode<TPixel>(Configuration configuration, Stream stream) |
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where TPixel : struct, IPixel<TPixel> |
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{ |
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using (var magickImage = new MagickImage(stream)) |
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{ |
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var result = new Image<TPixel>(configuration, magickImage.Width, magickImage.Height); |
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Span<TPixel> resultPixels = result.GetPixelSpan(); |
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using (IPixelCollection pixels = magickImage.GetPixelsUnsafe()) |
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{ |
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if (magickImage.Depth == 8) |
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{ |
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byte[] data = pixels.ToByteArray("RGBA"); |
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PixelOperations<TPixel>.Instance.PackFromRgba32Bytes(data, resultPixels, resultPixels.Length); |
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} |
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else if (magickImage.Depth == 16) |
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{ |
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ushort[] data = pixels.ToShortArray("RGBA"); |
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Span<byte> bytes = MemoryMarshal.Cast<ushort, byte>(data.AsSpan()); |
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PixelOperations<TPixel>.Instance.PackFromRgba64Bytes(bytes, resultPixels, resultPixels.Length); |
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} |
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else |
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{ |
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throw new InvalidOperationException(); |
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} |
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} |
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return result; |
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} |
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} |
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} |
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} |
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@ -0,0 +1,89 @@ |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using Xunit; |
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// ReSharper disable InconsistentNaming
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namespace SixLabors.ImageSharp.Tests.TestUtilities.Tests |
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{ |
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using SixLabors.ImageSharp.PixelFormats; |
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using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison; |
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using SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs; |
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using Xunit.Abstractions; |
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public class MagickReferenceCodecTests |
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{ |
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public MagickReferenceCodecTests(ITestOutputHelper output) |
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{ |
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this.Output = output; |
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} |
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private ITestOutputHelper Output { get; } |
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public const PixelTypes PixelTypesToTest32 = PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.Rgb24; |
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public const PixelTypes PixelTypesToTest64 = |
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PixelTypes.Rgba32 | PixelTypes.Rgb24 | PixelTypes.Rgba64 | PixelTypes.Rgb48; |
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public const PixelTypes PixelTypesToTest48 = |
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PixelTypes.Rgba32 | PixelTypes.Rgba64 | PixelTypes.Rgb48; |
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[Theory] |
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[WithBlankImages(1, 1, PixelTypesToTest32, TestImages.Png.Splash)] |
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[WithBlankImages(1, 1, PixelTypesToTest32, TestImages.Png.Indexed)] |
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public void MagickDecode_8BitDepthImage_IsEquivalentTo_SystemDrawingResult<TPixel>(TestImageProvider<TPixel> dummyProvider, string testImage) |
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where TPixel : struct, IPixel<TPixel> |
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{ |
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string path = TestFile.GetInputFileFullPath(testImage); |
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var magickDecoder = new MagickReferenceDecoder(); |
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var sdDecoder = new SystemDrawingReferenceDecoder(); |
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ImageComparer comparer = ImageComparer.Exact; |
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using (var mImage = Image.Load<TPixel>(path, magickDecoder)) |
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using (var sdImage = Image.Load<TPixel>(path, sdDecoder)) |
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{ |
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ImageSimilarityReport<TPixel, TPixel> report = comparer.CompareImagesOrFrames(mImage, sdImage); |
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mImage.DebugSave(dummyProvider); |
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if (TestEnvironment.IsWindows) |
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{ |
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Assert.True(report.IsEmpty); |
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} |
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} |
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} |
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[Theory] |
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[WithBlankImages(1, 1, PixelTypesToTest64, TestImages.Png.Rgba64Bpp)] |
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[WithBlankImages(1, 1, PixelTypesToTest48, TestImages.Png.Rgb48Bpp)] |
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[WithBlankImages(1, 1, PixelTypesToTest48, TestImages.Png.Rgb48BppInterlaced)] |
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[WithBlankImages(1, 1, PixelTypesToTest48, TestImages.Png.Rgb48BppTrans)] |
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public void MagickDecode_16BitDepthImage_IsApproximatelyEquivalentTo_SystemDrawingResult<TPixel>(TestImageProvider<TPixel> dummyProvider, string testImage) |
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where TPixel : struct, IPixel<TPixel> |
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{ |
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string path = TestFile.GetInputFileFullPath(testImage); |
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var magickDecoder = new MagickReferenceDecoder(); |
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var sdDecoder = new SystemDrawingReferenceDecoder(); |
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// 1020 == 4 * 255 (Equivalent to manhattan distance of 1+1+1+1=4 in Rgba32 space)
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var comparer = ImageComparer.TolerantPercentage(1, 1020); |
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using (var mImage = Image.Load<TPixel>(path, magickDecoder)) |
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using (var sdImage = Image.Load<TPixel>(path, sdDecoder)) |
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{ |
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ImageSimilarityReport<TPixel, TPixel> report = comparer.CompareImagesOrFrames(mImage, sdImage); |
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mImage.DebugSave(dummyProvider); |
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if (TestEnvironment.IsWindows) |
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{ |
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Assert.True(report.IsEmpty); |
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} |
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} |
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} |
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} |
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} |
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@ -0,0 +1,96 @@ |
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// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System.Collections.Generic; |
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using SixLabors.ImageSharp.Formats; |
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using SixLabors.ImageSharp.PixelFormats; |
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using SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs; |
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using Xunit; |
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using Xunit.Abstractions; |
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namespace SixLabors.ImageSharp.Tests.TestUtilities.Tests |
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{ |
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public class ReferenceDecoderBenchmarks |
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{ |
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private ITestOutputHelper Output { get; } |
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public const string SkipBenchmarks = |
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#if false
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"Benchmark, enable manually!"; |
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#else
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null; |
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#endif
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public const int DefaultExecutionCount = 50; |
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public static readonly string[] PngBenchmarkFiles = |
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{ |
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TestImages.Png.CalliphoraPartial, |
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TestImages.Png.Kaboom, |
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TestImages.Png.Bike, |
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TestImages.Png.Splash, |
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TestImages.Png.SplashInterlaced |
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}; |
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public static readonly string[] BmpBenchmarkFiles = |
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{ |
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TestImages.Bmp.NegHeight, |
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TestImages.Bmp.Car, |
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TestImages.Bmp.V5Header |
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}; |
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public ReferenceDecoderBenchmarks(ITestOutputHelper output) |
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{ |
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this.Output = output; |
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} |
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[Theory(Skip = SkipBenchmarks)] |
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[WithFile(TestImages.Png.Kaboom, PixelTypes.Rgba32)] |
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public void BenchmarkMagickPngDecoder<TPixel>(TestImageProvider<TPixel> provider) |
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where TPixel : struct, IPixel<TPixel> |
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{ |
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this.BenckmarkDecoderImpl(PngBenchmarkFiles, new MagickReferenceDecoder(), $@"Magick Decode Png"); |
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} |
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[Theory(Skip = SkipBenchmarks)] |
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[WithFile(TestImages.Png.Kaboom, PixelTypes.Rgba32)] |
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public void BenchmarkSystemDrawingPngDecoder<TPixel>(TestImageProvider<TPixel> provider) |
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where TPixel : struct, IPixel<TPixel> |
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{ |
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this.BenckmarkDecoderImpl(PngBenchmarkFiles, new SystemDrawingReferenceDecoder(), $@"System.Drawing Decode Png"); |
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} |
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[Theory(Skip = SkipBenchmarks)] |
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[WithFile(TestImages.Png.Kaboom, PixelTypes.Rgba32)] |
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public void BenchmarkMagickBmpDecoder<TPixel>(TestImageProvider<TPixel> provider) |
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where TPixel : struct, IPixel<TPixel> |
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{ |
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this.BenckmarkDecoderImpl(BmpBenchmarkFiles, new MagickReferenceDecoder(), $@"Magick Decode Bmp"); |
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} |
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[Theory(Skip = SkipBenchmarks)] |
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[WithFile(TestImages.Png.Kaboom, PixelTypes.Rgba32)] |
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public void BenchmarkSystemDrawingBmpDecoder<TPixel>(TestImageProvider<TPixel> provider) |
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where TPixel : struct, IPixel<TPixel> |
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{ |
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this.BenckmarkDecoderImpl(BmpBenchmarkFiles, new SystemDrawingReferenceDecoder(), $@"System.Drawing Decode Bmp"); |
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} |
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private void BenckmarkDecoderImpl(IEnumerable<string> testFiles, IImageDecoder decoder, string info, int times = DefaultExecutionCount) |
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{ |
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var measure = new MeasureFixture(this.Output); |
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measure.Measure(times, |
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() => |
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{ |
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foreach (string testFile in testFiles) |
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{ |
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Image<Rgba32> image = TestFile.Create(testFile).CreateImage(decoder); |
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image.Dispose(); |
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} |
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}, |
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info); |
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} |
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} |
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} |
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