Bug 212291 SWT Chart render engine always uses 96 DPI(Display) resolution
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWithAxes.java
&& iTickStyle != TickStyle.BELOW )
			{
				throw new ChartException( ChartEnginePlugin.ID,
						ChartException.VALIDATION,
						"exception.illegal.haxis.major.tick.style", 
						new Object[]{
								ax.getMajorGrid( ).getTickStyle( ).getName( ),
								ax
						},
						Messages.getResourceBundle( rtc.getULocale( ) ) );
			}
			iTickStyle = ax.getMinorGrid( ).getTickStyle( ).getValue( );
			if ( iTickStyle != TickStyle.ACROSS
					&& iTickStyle != TickStyle.ABOVE
					&& iTickStyle != TickStyle.BELOW )
			{
				throw new ChartException( ChartEnginePlugin.ID,
						ChartException.VALIDATION,
						"exception.illegal.haxis.minor.tick.style", 
						new Object[]{
								ax.getMinorGrid( ).getTickStyle( ).getName( ),
								ax
						},
						Messages.getResourceBundle( rtc.getULocale( ) ) );
			}
		}
	}
	/**
	 * This method converts a generic text dataset to a typed dataset as
	 * expected by the renderer