I've added 'draw line to' here (also works with just 'draw line' but with only 2 parameters). Should the starting coordinates only be affected by the previous 'draw line [to]', 'draw pixel' and 'set pixel'? Polygons are always closed, so it wouldn't really make sens to let 'draw line [to]' continue from the last = first point? I will add 'fill' too. I believe I wrote an example, "Flood fill", in n6 that was quite fast and can be rewriten in C.
"N7 has 'draw polygon'. Modify the command to include the 'fill' parameter"
'draw poly' already has a fill parameter
"N7 has 'draw polygon'. Modify the command to include the 'fill' parameter"
'draw poly' already has a fill parameter