ART Ellipse mark.

Members:

IG_ARTX_ellipse_border_get	Queries ellipse annotation border.
IG_ARTX_ellipse_border_set	Updates ellipse annotation border.
IG_ARTX_ellipse_create	Creates an instance of ellipse mark.
IG_ARTX_ellipse_bounds_get	Queries ellipse bounding rectangle.
IG_ARTX_ellipse_bounds_set	Updates ellipse bounding rectangle.
IG_ARTX_ellipse_fillcolor_get	Queries filling color of ellipse annotation.
IG_ARTX_ellipse_fillcolor_set	Updates ellipse annotation filling color.
IG_ARTX_ellipse_opacity_get	Queries value of ellipse annotation opacity.
IG_ARTX_ellipse_opacity_set	Updates value of ellipse annotation opacity attribute.