FSO.Files.ImageLoader.FromStream C# (CSharp) Method

        public static Texture2D FromStream(GraphicsDevice gd, Stream str)
        {
            //if (!UseSoftLoad)
            //{
            //attempt monogame load of image

            var magic = (str.ReadByte() | (str.ReadByte() << 8));
            str.Seek(0, SeekOrigin.Begin);
            magic += 0;
            if (magic == 0x4D42)
            {
                try
                {
                    //it's a bitmap.
                    var tex = Texture2D.FromStream(gd, str);
                    ManualTextureMaskSingleThreaded(ref tex, MASK_COLORS.ToArray());
                    return tex;
                }
                catch (Exception)
                {
                    return null; //bad bitmap :(
                }
            }
            else
            {
                //test for targa
                str.Seek(-18, SeekOrigin.End);
                byte[] sig = new byte[16];
                str.Read(sig, 0, 16);
                str.Seek(0, SeekOrigin.Begin);
                if (ASCIIEncoding.Default.GetString(sig) == "TRUEVISION-XFILE")
                {
                    try
                    {
                        var tga = new TargaImagePCL.TargaImage(str);
                        var tex = new Texture2D(gd, tga.Image.Width, tga.Image.Height);
                        tex.SetData(tga.Image.ToBGRA(true));
                        return tex;
                    }
                    catch (Exception)
                    {
                        return null; //bad tga
                    }
                } else
                {
                    //anything else
                    try
                    {
                        var tex = Texture2D.FromStream(gd, str);
                        return tex;
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine("error: " + e.ToString());
                        return new Texture2D(gd, 1, 1);
                    }
                }
            }
        }