Bug 212291 SWT Chart render engine always uses 96 DPI(Display) resolution
chart/org.eclipse.birt.chart.device.swt/src/org/eclipse/birt/chart/device/swt/SwtRendererImpl.java
final Bounds bo = ore.getBounds( );
		_gc.setForeground( cFG );
		R31Enhance.setAlpha( _gc, lia.getColor( ) );
		_gc.drawOval( (int) ( ( bo.getLeft( ) + dTranslateX ) * dScale ),
				(int) ( ( bo.getTop( ) + dTranslateY ) * dScale ),
				(int) ( bo.getWidth( ) * dScale ),
				(int) ( bo.getHeight( ) * dScale ) );
		_gc.setLineStyle( iOldLineStyle );
		_gc.setLineWidth( iOldLineWidth );
		cFG.dispose( );
		
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.event.IPrimitiveRenderer#fillOval(org.eclipse.birt.chart.event.OvalRenderEvent)
	 */
	public void fillOval( OvalRenderEvent ore ) throws ChartException
	{
		iv.modifyEvent( ore );
		
		final Fill flBackground = validateMultipleFill( ore.getBackground( ) );
		if ( isFullTransparent( flBackground ) )
		{
			return;
		}
		final Bounds bo = ore.getBounds( );
		final Rectangle r = new Rectangle( (int) ( ( bo.getLeft( ) + dTranslateX ) * dScale ),
				(int) ( ( bo.getTop( ) + dTranslateY ) * dScale ),
				(int) ( bo.getWidth( ) * dScale ),