ESC POS command prints a picture

Print the picture as follows:

Std::vector<qbytearray> Guilauncher::convertimagetobytearray (const qimage &img) {std::vector<
  Qbytearray> cmd_serial;
  Just print image!!
  int w = img.width ();
  int rw = W/8;
  int RH = Img.height ();
  int h = ((RH + 23)/24) * 24;

  int32_t img_seg_height = h;
  Cmd_serial.push_back (Poscmd ({27, 64}));
  RECV Data!!
  Qbytearray cmd;
  int32_t img_seg_count = h/img_seg_height;
    for (int si = 0; si < Img_seg_count; si++) {cmd.clear ();
    Cmd.append (29);
    Cmd.append (118);
    Cmd.append (48);
    Cmd.append ((char) 0);
    Cmd.append ((char) (rw% 256));
    Cmd.append ((char) (rw/256));
    Cmd.append ((char) (img_seg_height% 256));

    Cmd.append ((char) (img_seg_height/256));

        for (int ph = 0, ph < img_seg_height; ph++) {for (int rwi = 0; rwi < RW; rwi++) {char t = 0x00;
          for (int j = 0; J < 8; ++j) {int image_x = RWI * 8 + J;
          int image_y = ph + si * img_seg_height;
int V;          if (image_y >= RH) {v = 0;
          } else {v = qblue (Img.pixel (image_x, image_y)) < 0xc0? 1:0;
        } t |= (v << (7-j));
      } cmd.append (t);
  }} cmd_serial.push_back (cmd);
  } cmd_serial.push_back (Poscmd ({29, 86, 66, 0}));
return cmd_serial; }

Where cmd_serial is the POS command sequence, which is sent sequentially to the POS machine.