Returns <code>true</code> if receiver is using the operating system's
advanced graphics subsystem. Otherwise, <code>false</code> is returned
to indicate that normal graphics are in use.
<p>
Advanced graphics may not be installed for the operating system. In this
case, <code>false</code> is always returned. Some operating system have
only one graphics subsystem. If this subsystem supports advanced graphics,
then <code>true</code> is always returned. If any graphics operation such
as alpha, antialias, patterns, interpolation, paths, clipping or transformation
has caused the receiver to switch from regular to advanced graphics mode,
<code>true</code> is returned. If the receiver has been explicitly switched
to advanced mode and this mode is supported, <code>true</code> is returned.
</p>
@return the advanced value
@exception SWTException <ul>
<li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
</ul>
Returns <code>true</code> if receiver is using the operating system's advanced graphics subsystem. Otherwise, <code>false</code> is returned to indicate that normal graphics are in use. <p> Advanced graphics may not be installed for the operating system. In this case, <code>false</code> is always returned. Some operating system have only one graphics subsystem. If this subsystem supports advanced graphics, then <code>true</code> is always returned. If any graphics operation such as alpha, antialias, patterns, interpolation, paths, clipping or transformation has caused the receiver to switch from regular to advanced graphics mode, <code>true</code> is returned. If the receiver has been explicitly switched to advanced mode and this mode is supported, <code>true</code> is returned. </p>
@return the advanced value
@exception SWTException <ul> <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> </ul>
@see #setAdvanced
@since 3.1