Bug 194371 Use page emitter framework to implement ppt emitter.
In order to keep consistent with pdf and postscript, ppt need to use page emitter framework.
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTRender.java
/**
	 * Draws a container's border, and its background color/image if there is
	 * any.
	 * 
	 * @param container
	 *            the containerArea whose border and background need to be
	 *            drawed
	 */
	protected void drawContainer( IContainerArea container )
	{
		
		IStyle style = container.getStyle( );
		if ( null == style )
		{
			return;
		}
		ContainerPosition curPos;
		if ( !containerStack.isEmpty( ) )
			curPos = (ContainerPosition) containerStack.peek( );
		else
			curPos = new ContainerPosition( 0, 0 );
		
		
		if ( container.getContent( ) != null )
		{
			int layoutX = curPos.x + container.getX( );
			int layoutY = curPos.y + container.getY( );
			
			
			double startX = layoutPointX2PPT( layoutX );