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/SwtRendererImpl.java
y -= height / 2;
				break;
			case Position.RIGHT :
				y -= height / 2;
				break;
			case Position.ABOVE :
				x -= width / 2;
				y -= height;
				break;
			case Position.BELOW :
				x -= width / 2;
				break;
		}
		_gc.drawImage( img, x, y );
		img.dispose( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.event.IPrimitiveRenderer#drawLine(org.eclipse.birt.chart.event.LineRenderEvent)
	 */
	public void drawLine( LineRenderEvent lre ) throws ChartException
	{
		iv.modifyEvent( lre  );
		
		final LineAttributes lia = lre.getLineAttributes( );
		if ( !validateLineAttributes( lre.getSource( ), lia )
				|| lia.getColor( ) == null )
		{
			return;