Bug 212291 SWT Chart render engine always uses 96 DPI(Display) resolution
chart/org.eclipse.birt.chart.device.swt/src/org/eclipse/birt/chart/device/swt/SwtTextMetrics.java
sb.append( oText[i] ).append( "\n" ); 
			}
			if ( sb.length( ) > 0 )
			{
				sb.deleteCharAt( sb.length( ) - 1 );
			}
			la.getCaption( ).setValue( sb.toString( ) );
		}
	}
	/**
	 * Disposal of the internal image
	 */
	public final void dispose( )
	{
		disposeFont( );
		gc.dispose( );
	}
	public void disposeFont( )
	{
		if ( font != null )
		{
			font.dispose( );
			font = null;
		}
	}
	/**
	 * 
	 * @return
	 */
	public final boolean isDisposed( )