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/SwtTextRenderer.java
* @param la
	 * @param b
	 */
	private void showBottomValue( IPrimitiveRenderer ipr, Location lo,
			Label la, boolean b )
	{
		
	}
	/**
	 * @param ipr
	 * @param lo
	 * @param la
	 * @param b
	 */
	private void showTopValue( IPrimitiveRenderer ipr, Location lo, Label la,
			boolean b )
	{
		GC gc = (GC) ( (IDeviceRenderer) ipr ).getGraphicsContext( );
		double dX = lo.getX( ), dY = lo.getY( );
		final FontDefinition fd = la.getCaption( ).getFont( );
		final double dAngleInDegrees = fd.getRotation( );
		final double dAngleInRadians = Math.toRadians( dAngleInDegrees );
		final Color clrBackground = (Color) _sxs.getColor( la.getShadowColor( ) );
		final ITextMetrics itm = new SwtTextMetrics( _sxs, la );
		final double dFW = itm.getFullWidth( );
		final double dFH = itm.getFullHeight( );
		double scaledThickness = SHADOW_THICKNESS
				* _sxs.getDpiResolution( )
				/ 72d;
		gc.setBackground( clrBackground );