Bug 313882 [Regression]pageoverflow plus pagebreakinternal shows different pdf pages in web viewer and preview
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/nLayout/area/impl/ContainerArea.java
|| units.equals( EngineIRConstants.UNITS_IN ) )
			{
				double point = d.convertTo( EngineIRConstants.UNITS_PT ) * 1000;
				return (int) point;
			}
			else if ( units.equals( EngineIRConstants.UNITS_PX ) )
			{
				if ( dpi == 0 )
				{
					dpi = getResolution( );
				}
				double point = d.getMeasure( ) / dpi * 72000d;
				return (int) point;
			}
			else if ( units.equals( EngineIRConstants.UNITS_PERCENTAGE ) )
			{
				double point = referenceLength * d.getMeasure( ) / 100.0;
				return (int) point;
			}
			else if ( units.equals( EngineIRConstants.UNITS_EM )
					|| units.equals( EngineIRConstants.UNITS_EX ) )
			{
				int size = 9000;
				if ( content != null )
				{
					IStyle style = content.getComputedStyle( );
					CSSValue fontSize = style
							.getProperty( IStyle.STYLE_FONT_SIZE );
					size = getDimensionValue( fontSize );
				}