// Copyright (c) Six Labors.
// Licensed under the Six Labors Split License.

using Microsoft.DotNet.RemoteExecutor;
using SixLabors.ImageSharp.Formats;
using SixLabors.ImageSharp.Formats.Bmp;
using SixLabors.ImageSharp.Formats.Png;
using SixLabors.ImageSharp.Memory;
using SixLabors.ImageSharp.Metadata;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Tests.TestUtilities;
using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
using SixLabors.ImageSharp.Tests.TestUtilities.ReferenceCodecs;
using static SixLabors.ImageSharp.Tests.TestImages.Bmp;

// ReSharper disable InconsistentNaming
namespace SixLabors.ImageSharp.Tests.Formats.Bmp;

[Trait("Format", "Bmp")]
[ValidateDisposedMemoryAllocations]
public class BmpDecoderTests
{
    public const PixelTypes CommonNonDefaultPixelTypes = PixelTypes.Rgba32 | PixelTypes.Bgra32 | PixelTypes.RgbaVector;

    public static readonly string[] MiscBmpFiles = Miscellaneous;

    public static readonly string[] BitfieldsBmpFiles = BitFields;

    public static readonly TheoryData<string, int, int, PixelResolutionUnit> RatioFiles =
    new()
    {
        { Car, 3780, 3780, PixelResolutionUnit.PixelsPerMeter },
        { V5Header, 3780, 3780, PixelResolutionUnit.PixelsPerMeter },
        { RLE8, 2835, 2835, PixelResolutionUnit.PixelsPerMeter }
    };

    [Theory]
    [WithFileCollection(nameof(MiscBmpFiles), PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_MiscellaneousBitmaps<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        if (TestEnvironment.IsWindows)
        {
            image.CompareToOriginal(provider);
        }
    }

    [Theory]
    [WithFile(Car, PixelTypes.Rgba32)]
    [WithFile(F, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_MiscellaneousBitmaps_WithLimitedAllocatorBufferCapacity(
        TestImageProvider<Rgba32> provider)
    {
        static void RunTest(string providerDump, string nonContiguousBuffersStr)
        {
            TestImageProvider<Rgba32> provider = BasicSerializer.Deserialize<TestImageProvider<Rgba32>>(providerDump);

            provider.LimitAllocatorBufferCapacity().InPixelsSqrt(100);

            using Image<Rgba32> image = provider.GetImage(BmpDecoder.Instance);
            image.DebugSave(provider, nonContiguousBuffersStr);

            if (TestEnvironment.IsWindows)
            {
                image.CompareToOriginal(provider);
            }
        }

        string providerDump = BasicSerializer.Serialize(provider);
        RemoteExecutor.Invoke(RunTest, providerDump, "Disco").Dispose();
    }

    [Theory]
    [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
    [WithFile(Bit16, PixelTypes.Rgba32)]
    public void BmpDecoder_DegenerateMemoryRequest_ShouldTranslateTo_ImageFormatException<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        provider.LimitAllocatorBufferCapacity().InPixelsSqrt(10);
        InvalidImageContentException ex = Assert.Throws<InvalidImageContentException>(() => provider.GetImage(BmpDecoder.Instance));
        Assert.IsType<InvalidMemoryOperationException>(ex.InnerException);
    }

    [Theory]
    [WithFileCollection(nameof(BitfieldsBmpFiles), PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeBitfields<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Bit16Inverted, PixelTypes.Rgba32)]
    [WithFile(Bit8Inverted, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_Inverted<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Bit1, PixelTypes.Rgba32)]
    [WithFile(Bit1Pal1, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_1Bit<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider, new SystemDrawingReferenceDecoder(BmpFormat.Instance));
    }

    [Theory]
    [WithFile(Bit2, PixelTypes.Rgba32)]
    [WithFile(Bit2Color, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_2Bit<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        // Reference decoder cant decode 2-bit, compare to reference output instead.
        image.CompareToReferenceOutput(provider, extension: "png");
    }

    [Theory]
    [WithFile(Bit4, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_4Bit<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Bit8, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_8Bit<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Bit16, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_16Bit<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Bit32Rgb, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_32Bit<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Rgba32v4, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_32BitV4Header_Fast<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(RLE4Cut, PixelTypes.Rgba32)]
    [WithFile(RLE4Delta, PixelTypes.Rgba32)]
    [WithFile(Rle4Delta320240, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_RunLengthEncoded_4Bit_WithDelta<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        RleSkippedPixelHandling skippedPixelHandling = TestEnvironment.IsWindows ? RleSkippedPixelHandling.Black : RleSkippedPixelHandling.FirstColorOfPalette;
        BmpDecoderOptions options = new() { RleSkippedPixelHandling = skippedPixelHandling };

        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance, options);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(RLE4, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_RunLengthEncoded_4Bit<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        RleSkippedPixelHandling skippedPixelHandling = TestEnvironment.IsWindows ? RleSkippedPixelHandling.Black : RleSkippedPixelHandling.FirstColorOfPalette;
        BmpDecoderOptions options = new() { RleSkippedPixelHandling = skippedPixelHandling };

        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance, options);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(RLE8Cut, PixelTypes.Rgba32)]
    [WithFile(RLE8Delta, PixelTypes.Rgba32)]
    [WithFile(Rle8Delta320240, PixelTypes.Rgba32)]
    [WithFile(Rle8Blank160120, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_RunLengthEncoded_8Bit_WithDelta_SystemDrawingRefDecoder<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        BmpDecoderOptions options = new() { RleSkippedPixelHandling = RleSkippedPixelHandling.Black };
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance, options);
        image.DebugSave(provider);
        if (TestEnvironment.IsWindows)
        {
            image.CompareToOriginal(provider, new SystemDrawingReferenceDecoder(BmpFormat.Instance));
        }
    }

    [Theory]
    [WithFile(RLE8Cut, PixelTypes.Rgba32)]
    [WithFile(RLE8Delta, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_RunLengthEncoded_8Bit_WithDelta_MagickRefDecoder<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        BmpDecoderOptions options = new() { RleSkippedPixelHandling = RleSkippedPixelHandling.FirstColorOfPalette };
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance, options);
        image.DebugSave(provider);
        image.CompareToOriginal(provider, MagickReferenceDecoder.Png);
    }

    [Theory]
    [WithFile(RLE8, PixelTypes.Rgba32, false)]
    [WithFile(RLE8Inverted, PixelTypes.Rgba32, false)]
    [WithFile(RLE8, PixelTypes.Rgba32, true)]
    [WithFile(RLE8Inverted, PixelTypes.Rgba32, true)]
    public void BmpDecoder_CanDecode_RunLengthEncoded_8Bit<TPixel>(TestImageProvider<TPixel> provider, bool enforceDiscontiguousBuffers)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        if (enforceDiscontiguousBuffers)
        {
            provider.LimitAllocatorBufferCapacity().InBytesSqrt(400);
        }

        BmpDecoderOptions options = new() { RleSkippedPixelHandling = RleSkippedPixelHandling.FirstColorOfPalette };
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance, options);
        image.DebugSave(provider);
        image.CompareToOriginal(provider, MagickReferenceDecoder.Png);
    }

    [Theory]
    [WithFile(RLE24, PixelTypes.Rgba32, false)]
    [WithFile(RLE24Cut, PixelTypes.Rgba32, false)]
    [WithFile(RLE24Delta, PixelTypes.Rgba32, false)]
    [WithFile(RLE24, PixelTypes.Rgba32, true)]
    [WithFile(RLE24Cut, PixelTypes.Rgba32, true)]
    [WithFile(RLE24Delta, PixelTypes.Rgba32, true)]
    public void BmpDecoder_CanDecode_RunLengthEncoded_24Bit<TPixel>(TestImageProvider<TPixel> provider, bool enforceNonContiguous)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        if (enforceNonContiguous)
        {
            provider.LimitAllocatorBufferCapacity().InBytesSqrt(400);
        }

        BmpDecoderOptions options = new() { RleSkippedPixelHandling = RleSkippedPixelHandling.Black };
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance, options);
        image.DebugSave(provider);

        // Neither System.Drawing nor MagickReferenceDecoder decode this file.
        // Compare to reference output instead.
        image.CompareToReferenceOutput(provider, extension: "png");
    }

    [Theory]
    [WithFile(RgbaAlphaBitfields, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeAlphaBitfields<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        // Neither System.Drawing nor MagickReferenceDecoder decode this file.
        // Compare to reference output instead.
        image.CompareToReferenceOutput(provider, extension: "png");
    }

    [Theory]
    [WithFile(Bit32Rgba, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeBitmap_WithAlphaChannel<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider, MagickReferenceDecoder.Png);
    }

    [Theory]
    [WithFile(Rgba321010102, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeBitfields_WithUnusualBitmasks<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        // Choosing large tolerance of 6.1 here, because for some reason with the MagickReferenceDecoder the alpha channel
        // seems to be wrong. This bitmap has an alpha channel of two bits. In many cases this alpha channel has a value of 3,
        // which should be remapped to 255 for RGBA32, but the magick decoder has a value of 191 set.
        // The total difference without the alpha channel is still: 0.0204%
        // Exporting the image as PNG with GIMP yields to the same result as the ImageSharp implementation.
        image.CompareToOriginal(provider, ImageComparer.TolerantPercentage(6.1f), MagickReferenceDecoder.Png);
    }

    [Theory]
    [WithFile(WinBmpv2, PixelTypes.Rgba32)]
    [WithFile(CoreHeader, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeBmpv2<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        // Do not validate. Reference files will fail validation.
        image.CompareToOriginal(provider, new MagickReferenceDecoder(PngFormat.Instance, false));
    }

    [Theory]
    [WithFile(WinBmpv3, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeBmpv3<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(LessThanFullSizedPalette, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeLessThanFullPalette<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider, MagickReferenceDecoder.Png);
    }

    [Theory]
    [WithFile(OversizedPalette, PixelTypes.Rgba32)]
    [WithFile(Rgb24LargePalette, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeOversizedPalette<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        if (TestEnvironment.IsWindows)
        {
            image.CompareToOriginal(provider);
        }
    }

    [Theory]
    [WithFile(InvalidPaletteSize, PixelTypes.Rgba32)]
    public void BmpDecoder_ThrowsInvalidImageContentException_OnInvalidPaletteSize<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
        => Assert.Throws<InvalidImageContentException>(() =>
        {
            using (provider.GetImage(BmpDecoder.Instance))
            {
            }
        });

    [Theory]
    [WithFile(Rgb24jpeg, PixelTypes.Rgba32)]
    [WithFile(Rgb24png, PixelTypes.Rgba32)]
    public void BmpDecoder_ThrowsNotSupportedException_OnUnsupportedBitmaps<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
        => Assert.Throws<NotSupportedException>(() =>
        {
            using (provider.GetImage(BmpDecoder.Instance))
            {
            }
        });

    [Theory]
    [WithFile(Rgb32h52AdobeV3, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeAdobeBmpv3<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider, MagickReferenceDecoder.Png);
    }

    [Theory]
    [WithFile(Rgba32bf56AdobeV3, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeAdobeBmpv3_WithAlpha<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider, MagickReferenceDecoder.Png);
    }

    [Theory]
    [WithFile(WinBmpv4, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeBmpv4<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(WinBmpv5, PixelTypes.Rgba32)]
    [WithFile(V5Header, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecodeBmpv5<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Pal8Offset, PixelTypes.Rgba32)]
    public void BmpDecoder_RespectsFileHeaderOffset<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(F, CommonNonDefaultPixelTypes)]
    public void BmpDecoder_IsNotBoundToSinglePixelType<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [WithFile(Bit8Palette4, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode4BytePerEntryPalette<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);
        image.CompareToOriginal(provider);
    }

    [Theory]
    [InlineData(Bit32Rgb, 32)]
    [InlineData(Bit32Rgba, 32)]
    [InlineData(Car, 24)]
    [InlineData(F, 24)]
    [InlineData(NegHeight, 24)]
    [InlineData(Bit16, 16)]
    [InlineData(Bit16Inverted, 16)]
    [InlineData(Bit8, 8)]
    [InlineData(Bit8Inverted, 8)]
    [InlineData(Bit4, 4)]
    [InlineData(Bit1, 1)]
    [InlineData(Bit1Pal1, 1)]
    public void Identify_DetectsCorrectPixelType(string imagePath, int expectedPixelSize)
    {
        TestFile testFile = TestFile.Create(imagePath);
        using MemoryStream stream = new(testFile.Bytes, false);
        ImageInfo imageInfo = Image.Identify(stream);
        Assert.NotNull(imageInfo);
        Assert.Equal(expectedPixelSize, imageInfo.PixelType.BitsPerPixel);
    }

    [Theory]
    [InlineData(Bit32Rgb, 127, 64)]
    [InlineData(Car, 600, 450)]
    [InlineData(Bit16, 127, 64)]
    [InlineData(Bit16Inverted, 127, 64)]
    [InlineData(Bit8, 127, 64)]
    [InlineData(Bit8Inverted, 127, 64)]
    [InlineData(RLE8, 491, 272)]
    [InlineData(RLE8Inverted, 491, 272)]
    public void Identify_DetectsCorrectWidthAndHeight(string imagePath, int expectedWidth, int expectedHeight)
    {
        TestFile testFile = TestFile.Create(imagePath);
        using MemoryStream stream = new(testFile.Bytes, false);
        ImageInfo imageInfo = Image.Identify(stream);
        Assert.NotNull(imageInfo);
        Assert.Equal(expectedWidth, imageInfo.Width);
        Assert.Equal(expectedHeight, imageInfo.Height);
    }

    [Theory]
    [MemberData(nameof(RatioFiles))]
    public void Decode_VerifyRatio(string imagePath, int xResolution, int yResolution, PixelResolutionUnit resolutionUnit)
    {
        TestFile testFile = TestFile.Create(imagePath);
        using MemoryStream stream = new(testFile.Bytes, false);
        using Image<Rgba32> image = BmpDecoder.Instance.Decode<Rgba32>(DecoderOptions.Default, stream);
        ImageMetadata meta = image.Metadata;
        Assert.Equal(xResolution, meta.HorizontalResolution);
        Assert.Equal(yResolution, meta.VerticalResolution);
        Assert.Equal(resolutionUnit, meta.ResolutionUnits);
    }

    [Theory]
    [WithFile(Os2v2Short, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_Os2v2XShortHeader<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        // Neither System.Drawing or MagickReferenceDecoder can correctly decode this file.
        // Compare to reference output instead.
        image.CompareToReferenceOutput(provider, extension: "png");
    }

    [Theory]
    [WithFile(Os2v2, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_Os2v2Header<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        // System.Drawing can not decode this image. MagickReferenceDecoder can decode it,
        // Compare to reference output instead.
        image.CompareToReferenceOutput(provider, extension: "png");
    }

    [Theory]
    [WithFile(Os2BitmapArray, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArray9s, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArrayDiamond, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArraySkater, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArraySpade, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArraySunflower, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArrayMarble, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArrayWarpd, PixelTypes.Rgba32)]
    [WithFile(Os2BitmapArrayPines, PixelTypes.Rgba32)]
    public void BmpDecoder_CanDecode_Os2BitmapArray<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
        image.DebugSave(provider);

        // Neither System.Drawing or MagickReferenceDecoder can correctly decode this file.
        // Compare to reference output instead.
        image.CompareToReferenceOutput(provider, extension: "png");
    }

    [Theory]
    [WithFile(Issue2696, PixelTypes.Rgba32)]
    public void BmpDecoder_ThrowsException_Issue2696<TPixel>(TestImageProvider<TPixel> provider)
        where TPixel : unmanaged, IPixel<TPixel>
    {
        InvalidImageContentException ex = Assert.Throws<InvalidImageContentException>(() =>
            {
                using Image<TPixel> image = provider.GetImage(BmpDecoder.Instance);
            });
        Assert.IsType<InvalidMemoryOperationException>(ex.InnerException);
    }
}