Bug 212291 SWT Chart render engine always uses 96 DPI(Display) resolution
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/swing/SwingRendererImpl.java
are.getAngleExtent( ),
						Arc2D.PIE );
				Area fArea = new Area( outerArc );
				fArea.exclusiveOr( new Area( innerArc ) );
				if ( shPreviousClip != null )
				{
					Area ar1 = new Area( shPreviousClip );
					fArea.intersect( ar1 );
				}
				_g2d.setClip( fArea );
			}
			else
			{
				
				final Shape shArc = new Arc2D.Double( are.getTopLeft( ).getX( ),
						are.getTopLeft( ).getY( ),
						are.getWidth( ),
						are.getHeight( ),
						are.getStartAngle( ),
						are.getAngleExtent( ),
						toSwingArcType( are.getStyle( ) ) );
				Area ar2 = new Area( shArc );
				if ( shPreviousClip != null )
				{
					Area ar1 = new Area( shPreviousClip );
					ar2.intersect( ar1 );
				}
				_g2d.setClip( ar2 );
			}