Returns the receiver's anti-aliasing setting value, which will be
one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code> or
<code>SWT.ON</code>. Note that this controls anti-aliasing for all
<em>non-text drawing</em> operations.
@return the anti-aliasing setting
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Returns the receiver's anti-aliasing setting value, which will be one of <code>SWT.DEFAULT</code>, <code>SWT.OFF</code> or <code>SWT.ON</code>. Note that this controls anti-aliasing for all <em>non-text drawing</em> operations.
@return the anti-aliasing setting
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>
@see #getTextAntialias
@since 3.1