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
cachedWidth = Double.NaN;
		String s = la.getCaption( ).getValue( );
		if ( s == null )
		{
			s = IConstants.NULL_STRING;
		}
		else
		{
			
			s = s.trim( );
		}
		String[] sa = splitOnBreaks( s, forceWrappingSize );
		if ( sa == null )
		{
			iLineCount = 1;
			oText = new String[]{
				s
			};
		}
		else
		{
			iLineCount = sa.length;
			oText = sa;
		}
		if ( forceWrappingSize > 0 )
		{
			
			StringBuffer sb = new StringBuffer( );
			for ( int i = 0; i < oText.length; i++ )
			{