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
private final IDisplayServer ids;
	private Font font;
	/**
	 * The constructor initializes a tiny image that provides a graphics context
	 * capable of performing computations in the absence of a visual component
	 * 
	 * @param _ids
	 * @param _la
	 */
	public SwtTextMetrics( final IDisplayServer _ids, Label _la )
	{
		final Display display = (Display) ( (SwtDisplayServer) _ids ).getDevice( );
		display.syncExec( new Runnable( ) {
			public void run( )
			{
				gc = new GC( display );
			}
		} );
		ids = _ids;
		la = _la;
		reuse( la );
	}
	/**
	 * Allows reuse of the multi-line text element for computing bounds of a
	 * different font
	 * 
	 * @param fd
	 */
	public final void reuse( Label la, double forceWrappingSize )
	{