Gambas ONE

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public static class ImagePrint
{
    /// <summary>
    /// Image convert to Byte Array
    /// </summary>
    /// <param name="LogoPath">Image Path</param>
    /// <param name="printWidth">Image print Horizontal Length</param>
    /// <returns></returns>
    public static byte[] GetLogo(string LogoPath, int printWidth)
    {
        List<byte> byteList = new List<byte>();
        if (!File.Exists(LogoPath))
            return null;
        BitmapData data = GetBitmapData(LogoPath, printWidth);
        BitArray dots = data.Dots;
        byte[] width = BitConverter.GetBytes(data.Width);

        int offset = 0;
        // Initialize Printer
        byteList.Add(Convert.ToByte(Convert.ToChar(0x1B)));
        byteList.Add(Convert.ToByte('@'));

        // Line Spacing Adjust (24/180 inch)
        byteList.Add(Convert.ToByte(Convert.ToChar(0x1B)));
        byteList.Add(Convert.ToByte('3'));
        byteList.Add((byte)24);
        while (offset < data.Height)
        {
            byteList.Add(Convert.ToByte(Convert.ToChar(0x1B)));
            byteList.Add(Convert.ToByte('*'));
            byteList.Add((byte)33);
            byteList.Add(width[0]);
            byteList.Add(width[1]);

            for (int x = 0; x < data.Width; ++x)
            {
                for (int k = 0; k < 3; ++k)
                {
                    byte slice = 0;
                    for (int b = 0; b < 8; ++b)
                    {
                        int y = (((offset / 8) + k) * 8) + b;
                        int i = (y * data.Width) + x;

                        bool v = false;
                        if (i < dots.Length)
                            v = dots[i];

                        slice |= (byte)((v ? 1 : 0) << (7 - b));
                    }
                    byteList.Add(slice);
                }
            }
            offset += 24;
            byteList.Add(Convert.ToByte(0x0A));
        }

        // Return to normal line spacing (30/160 inch)
        byteList.Add(Convert.ToByte(0x1B));
        byteList.Add(Convert.ToByte('3'));
        byteList.Add((byte)30);
        return byteList.ToArray();
    }

    private static BitmapData GetBitmapData(string bmpFileName, int width)
    {
        using (var bitmap = (Bitmap)Bitmap.FromFile(bmpFileName))
        {
            var threshold = 127;
            var index = 0;
            double multiplier = width; // 이미지 width조정
            double scale = (double)(multiplier / (double)bitmap.Width);
            int xheight = (int)(bitmap.Height * scale);
            int xwidth = (int)(bitmap.Width * scale);
            var dimensions = xwidth * xheight;
            var dots = new BitArray(dimensions);

            for (var y = 0; y < xheight; y++)
            {
                for (var x = 0; x < xwidth; x++)
                {
                    var _x = (int)(x / scale);
                    var _y = (int)(y / scale);
                    var color = bitmap.GetPixel(_x, _y);
                    var luminance = (int)(color.R * 0.3 + color.G * 0.59 + color.B * 0.11);
                    dots[index] = (luminance < threshold);
                    index++;
                }
            }

            return new BitmapData()
            {
                Dots = dots,
                Height = (int)(bitmap.Height * scale),
                Width = (int)(bitmap.Width * scale)
            };
        }
    }

    private class BitmapData
    {
        public BitArray Dots
        {
            get;
            set;
        }

        public int Height
        {
            get;
            set;
        }

        public int Width
        {
            get;
            set;
        }
    }
}