When COM_TRANSFORM is not set, the function expects the array of points to be in screen coordinates.

When the COM_AREA or COM_PATH flag is set, this function is part of an area or path definition. In either case, the handling routine would usually pass the call back to the graphics engine for processing by the default handling routine. The call would not be passed back to the graphics engine if the presentation driver had hooked all of the area and path functions.

When this function is used to draw a closed figure, the handling routine must not draw the last point of the last (closure) line. The handling routine can call back to the graphics engine to do any necessary clipping.