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
{
				updateOverlayScales( aax, dY - dH, dY, dX, dW );
				dX = aax.getStart( );
				dW = aax.getLength( );
			}
		}
		double dStart, dEnd;
		final Axis[] axa = cwa.getPrimaryBaseAxes( );
		final Axis axPrimaryBase = axa[0];
		final Axis axPrimaryOrthogonal = cwa.getPrimaryOrthogonalAxis( axPrimaryBase );
		Scale sc = axPrimaryBase.getScale( );
		
		AutoScale scPrimaryBase = null;
		OneAxis oaxPrimaryBase = aax.getPrimaryBase( );
		int iAxisType = getAxisType( axPrimaryBase );
		Object oaData = null;
		if ( iAxisType == TEXT || oaxPrimaryBase.isCategoryScale( ) )
		{
			oaData = getTypedDataSet( axPrimaryBase, iAxisType, 0 );
		}
		else if ( ( iAxisType & NUMERICAL ) == NUMERICAL )
		{
			oaData = getMinMax( axPrimaryBase, iAxisType );
		}
		else if ( ( iAxisType & DATE_TIME ) == DATE_TIME )
		{
			oaData = getMinMax( axPrimaryBase, iAxisType );
		}
		DataSetIterator dsi = ( oaData instanceof DataSetIterator ) ? (DataSetIterator) oaData