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
* 
	 * @param ax
	 *            The model's axis for which a series will be queried
	 * @param iType
	 *            The renderer datatype associated with the axis
	 * @param iSeriesIndex
	 *            The series index for which the typed dataset is being built
	 * 
	 * @return
	 */
	protected final DataSetIterator getTypedDataSet( Axis ax, int iType,
			int iSeriesIndex ) throws ChartException, IllegalArgumentException
	{
		final Series[] sea = ax.getRuntimeSeries( );
		if ( sea.length == 0 ) 
		{
			if ( ( iType & NUMERICAL ) == NUMERICAL )
			{
				return new DataSetIterator( new Double[]{
						new Double( 1 ), new Double( 2 )
				} );
			}
			else if ( ( iType & DATE_TIME ) == DATE_TIME )
			{
				return new DataSetIterator( new Calendar[]{
						new CDateTime( ), new CDateTime( )
				} );
			}
			else if ( ( iType & TEXT ) == TEXT )
			{