🚀 go-pugleaf

PCL5 includes the plotter language, HP-GL/2.  You use it something like this,

    printf("\33%0B");			// Enter HP-GL/2 mode
    printf("IN");			// Initialize HP-GL/2 Mode
		.
		.			// Drawing commands
		.
    printf("\33%0A");			// Return to PCL
    printf("\33E");			// Reset and end job.

There are far too many drawing commands to describe here.  But if you were
to insert the following two statements into the code above, you'd draw a
triangle,

    printf("SP1PA10,10");		// Select pen 1, move to 10,10
    printf("PD2500,10,10,1500,10,10;");	// Pen down and draw three lines.

The complete language for the LaserJet III printers is documented in the
"PCL5 Printer Language Technical Reference Manual", HP Part 33459-90903.
I adapted the example above from this guide.

Jim Conrad
Network Printer Division