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
{
		final Location[] loa = cre.getVertices( );
		if ( loa == null )
		{
			_gc.setClipping( (Region) null );
		}
		else
		{
			Region rgClipping = new Region( );
			rgClipping.add( getCoordinatesAsInts( loa,
					TRUNCATE,
					dTranslateX,
					dTranslateY,
					dScale ) );
			_gc.setClipping( rgClipping );
			rgClipping.dispose( );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.event.IPrimitiveRenderer#drawImage(org.eclipse.birt.chart.event.ImageRenderEvent)
	 */
	public void drawImage( ImageRenderEvent pre ) throws ChartException
	{
		if ( pre.getImage( ) == null || pre.getLocation( ) == null )
		{
			return;
		}
		Image img = null;