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
protected IDisplayServer ids;
	/**
	 * The runtime context associated with chart generation
	 */
	protected RunTimeContext rtc;
	/**
	 * A computed plot area based on the block dimensions and the axis
	 * attributes and label values
	 */
	protected Bounds boPlotBackground = BoundsImpl.create( 0, 0, 100, 100 );
	/**
	 * Insets maintained as pixels equivalent of the points value specified in
	 * the model used here for fast computations
	 */
	protected Insets insCA = null;
	/**
	 * Ratio for converting a point to a pixel
	 */
	protected transient double dPointToPixel = 0;
	/**
	 * Converts to internal (non public-model) data structures
	 * 
	 * @param cd
	 * @return
	 */
	protected static final int getDimension( ChartDimension cd )
	{
		switch ( cd.getValue( ) )
		{
			case ChartDimension.TWO_DIMENSIONAL :