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/PlotWith2DAxes.java
: new DataSetIterator( oaData, iAxisType );
		oaData = null;
		dStart = ( aax.areAxesSwapped( ) ) ? dY + dH : dX;
		dEnd = ( aax.areAxesSwapped( ) ) ? dY : dStart + dW;
		int iDirection = AUTO;
		scPrimaryBase = AutoScale.computeScale( ids,
				oaxPrimaryBase,
				dsi,
				iAxisType,
				dStart,
				dEnd,
				sc,
				axPrimaryBase.getFormatSpecifier( ),
				rtc,
				iDirection,
				1,
				iMarginPercent );
		
		oaxPrimaryBase.set( scPrimaryBase );
		
		AutoScale scPrimaryOrthogonal = null;
		OneAxis oaxPrimaryOrthogonal = aax.getPrimaryOrthogonal( );
		iAxisType = getAxisType( axPrimaryOrthogonal );
		oaData = null;
		if ( ( iAxisType & NUMERICAL ) == NUMERICAL
				|| ( iAxisType & DATE_TIME ) == DATE_TIME )
		{
			dsi = new DataSetIterator( getMinMax( axPrimaryOrthogonal,
					iAxisType ), iAxisType );