This interface defines the set of calls that pipeline objects
can use to pass on responsibility for drawing arbitrary
Six floating point numbers are provided and the parallelogram
is defined as the quadrilateral with the following vertices:
Draw a Parallelogram with the indicated line widths
assuming a standard BasicStroke with MITER joins.
lw1 specifies the width of the stroke along the dx1,dy1
vector and lw2 specifies the width of the stroke along
the dx2,dy2 vector.
This is equivalent to outsetting the indicated
parallelogram by lw/2 pixels, then insetting the
same parallelogram by lw/2 pixels and filling the
difference between the outer and inner parallelograms.