The queue driver is also called a queue processor. It is used to take print jobs from a queue and print the data using the printer driver. The print job data (either PM_Q_STD or PM_Q_RAW format) is passed through the GPI. For PM_Q_STD jobs, GpiPlayMetaFile is used; and for PM_Q_RAW jobs, the DevEscape DEVESC_RAWDATA is used.