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
double dStart, dEnd;
						if ( bForwardScale )
						{
							double dAMin_AMax = da[1] - da[0];
							double dAMin_RI = da[1] - dY;
							dEnd = da[1];
							dStart = ( dT_RI / dAMin_RI ) * dAMin_AMax + da[0];
							if ( dStart < dBlockY )
							{
								dStart = dBlockY;
								bForceBreak = true; 
								
								
								
							}
						}
						else
						{
							double dAMin_AMax = da[0] - da[1];
							double dAMin_RI = da[0] - dY;
							dStart = da[0];
							dEnd = ( dT_RI / dAMin_RI ) * dAMin_AMax + da[1];
							if ( dEnd < dBlockY )
							{
								dEnd = dBlockY;
								bForceBreak = true; 
								
								
								
							}