Dalamud/Dalamud/Utility/TexFileExtensions.cs

using ImGuiScene;
using Lumina.Data.Files;

namespace Dalamud.Utility;

/// <summary>
/// Extensions to <see cref="TexFile"/>.
/// </summary>
public static class TexFileExtensions
{
    /// <summary>
    /// Returns the image data formatted for <see cref="RawDX11Scene.LoadImageRaw"/>.
    /// </summary>
    /// <param name="texFile">The TexFile to format.</param>
    /// <returns>The formatted image data.</returns>
    public static byte[] GetRgbaImageData(this TexFile texFile)
    {
        var imageData = texFile.ImageData;
        var dst = new byte[imageData.Length];

        for (var i = 0; i < dst.Length; i += 4)
        {
            dst[i] = imageData[i + 2];
            dst[i + 1] = imageData[i + 1];
            dst[i + 2] = imageData[i];
            dst[i + 3] = imageData[i + 3];
        }

        return dst;
    }
}