斑马打印机打印图片核心代码

 private string Convert(string s_FilePath)
        {
            int b = 0;
            long n = 0;
            long clr;
            StringBuilder sb = new StringBuilder();
            sb.Append("^XA~DGR:ZONE.GRF,");
            Bitmap bm = new Bitmap(s_FilePath);
            int w = ((bm.Size.Width / 8 + ((bm.Size.Width % 8 == 0) ? 0 : 1)) * bm.Size.Height);
            int h = (bm.Size.Width / 8 + ((bm.Size.Width % 8 == 0) ? 0 : 1));

            sb.Append(w.ToString().PadLeft(5, '0') + "," + h.ToString().PadLeft(3, '0') + ",\n");
            using (Bitmap bmp = new Bitmap(bm.Size.Width, bm.Size.Height))
            {
                for (int y = 0; y < bm.Size.Height; y++)
                {
                    for (int x = 0; x < bm.Size.Width; x++)
                    {
                        b = b * 2;
                        clr = bm.GetPixel(x, y).ToArgb();
                        string s = clr.ToString("X");

                        if (s.Substring(s.Length - 6, 6).CompareTo("BBBBBB") < 0)
                        {
                            bmp.SetPixel(x, y, bm.GetPixel(x, y));
                            b++;
                        }
                        n++;
                        if (x == (bm.Size.Width - 1))
                        {
                            if (n < 8)
                            {
                                b = b * (2 ^ (8 - (int)n));

                                sb.Append(b.ToString("X").PadLeft(2, '0'));
                                b = 0;
                                n = 0;
                            }
                        }
                        if (n >= 8)
                        {
                            sb.Append(b.ToString("X").PadLeft(2, '0'));
                            b = 0;
                            n = 0;
                        }
                    }
                }
                sb.Append("^LH0,0^FO5,60^XGR:ZONE.GRF^FS^XZ");
            }
            return sb.ToString();
        }