Bug 212291 SWT Chart render engine always uses 96 DPI(Display) resolution
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/AxesRenderHelper.java
return new DatetimeAxisTypeComputation( );
		}
		throw new ChartException( ChartEnginePlugin.ID,
				ChartException.RENDERING,
				"exception.undefined.axis.type", 
				Messages.getResourceBundle( getRunTimeContext( ).getULocale( ) ) );
	}
	void renderVerticalAxisByType( ComputationContext context, double dXEnd,
			double dZEnd, double dZ, double dStaggeredLabelOffset )
			throws ChartException
	{
		
		
		final int iDirection = sc.getDirection( ) != IConstants.FORWARD ? -1
				: 1;
		IAxisTypeComputation computation = createAxisTypeComputation( context );
		computation.initialize( );
		
		final double dOffset = computation instanceof TextAxisTypeComputation
				&& bTickBetweenCategories ? iDirection * sc.getUnitSize( ) / 2
				: 0;
		
		final int length = computation instanceof TextAxisTypeComputation ? da.size( ) - 1
				: da.size( );
		final double x = ( iLabelLocation == IConstants.LEFT ) ? context.dTick1 - 1
				: context.dTick2 + 1;
		for ( int i = 0; i < length; i++ )
		{
			computation.handlePreEachTick( i );
			int y = (int) da.getCoordinate( i );