Unable to send Graphics data through printer driver for a dot matrix printer

The system is connected to W5500 EVB through a LAN port and the W5500 EVB is connected to the Printer MLC through UART Connection.

Following this procedure, we can print from the system to the printer as well as from network ports too by changing our Ethernet IP address. But supports only text format. EVM is not able to support PDF printing and graphics.

And also, we are unable to print graphics data from both the system to the printer as well and from network ports to the printer.

Please suggest what are the issues and how to correct them in the Firmware.