using System;

using System.Collections.Generic;

using System.IO;

using System.Runtime.InteropServices;

using System.Text;

using BCnEncoder.Decoder;

using BCnEncoder.Encoder;

using BCnEncoder.ImageSharp;

using BCnEncoder.Shared;

using BCnEncTests.Support;

using SixLabors.ImageSharp.Advanced;

using SixLabors.ImageSharp.PixelFormats;

using Xunit;

namespace BCnEncTests

{

public class EncodeByteOrderTests

{

private void EncodeByteOrderTest<T>(PixelFormat pixelFormat) where T : unmanaged, IPixel<T>

{

using var imageOrig = ImageLoader.LoadTestImageSharp("../../../testImages/test_alpha_1_512.png");

var testImage = imageOrig.CloneAs<T>();

var pixels = testImage.GetPixelMemoryGroup()[0];

var bytes = MemoryMarshal.AsBytes(pixels.Span);

var encoder = new BcEncoder(CompressionFormat.Bc3);

var decoder = new BcDecoder();

using var ms = new MemoryStream();

encoder.EncodeToStream(bytes, testImage.Width, testImage.Height, pixelFormat, ms);

ms.Position = 0;

var decoded = decoder.DecodeToImageRgba32(ms);

var hasNoAlpha = pixelFormat == PixelFormat.Rgb24 || pixelFormat == PixelFormat.Bgr24;

TestHelper.AssertImagesEqual(imageOrig, decoded, encoder.OutputOptions.Quality,

!hasNoAlpha);

}

[Fact]

public void EncodeByteOrderBgra()

{

EncodeByteOrderTest<Bgra32>(PixelFormat.Bgra32);

}

[Fact]

public void EncodeByteOrderBgr()

{

EncodeByteOrderTest<Bgr24>(PixelFormat.Bgr24);

}

[Fact]

public void EncodeByteOrderArgb()

{

EncodeByteOrderTest<Argb32>(PixelFormat.Argb32);

}

[Fact]

public void EncodeByteOrderRgba()

{

EncodeByteOrderTest<Rgba32>(PixelFormat.Rgba32);

}

[Fact]

public void EncodeByteOrderRgb24()

{

EncodeByteOrderTest<Rgb24>(PixelFormat.Rgb24);

}

}

}