ART Ellipse mark.
| 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. |