Distance from the corner to the furthest edge of the banner along
the vertical or horizontal axis (the two distances are equal because
the angle is 45 degrees).
Distance from the corner to the nearest edge of the banner along
the vertical or horizontal axis (the two distances are equal because
the angle is 45 degrees).
Translates and rotates the canvas such that the top-left corner of
the content is drawn at the desired location on the screen, and
that content is angled 45 degrees in the appropriate direction
for this banner position.