Bug 196272 Text position is incorrect in postscript and ppt.
Text position need to be ajusted according to baseline position.
engine/org.eclipse.birt.report.engine.emitter.postscript/src/org/eclipse/birt/report/engine/emitter/postscript/PostscriptWriter.java
public void drawBackgroundImage( String imageURI, float x, float y,
			float width, float height, float positionX, float positionY,
			String repeat ) throws IOException
	{
		URL url = new URL( imageURI );
		InputStream imageStream = null;
		try
		{
			imageStream = url.openStream( );
			Image image = ImageIO.read( imageStream );
			ImageSource imageSource = getImageSource( image );
			Position areaPosition = new Position( x, y );
			Position areaSize = new Position( width, height );
			Position imagePosition = new Position( x + positionX, y + positionY );
			
			
			Position imageSize = new Position( imageSource.getWidth( ),
					imageSource.getHeight( ) );
			BackgroundImageLayout layout = new BackgroundImageLayout(
					areaPosition, areaSize, imagePosition, imageSize );
			Collection positions = layout.getImagePositions( repeat );
			gSave( );
			out.println( "clipsave" );
			setColor( Color.WHITE );
			out.println( "newpath" );
			drawRawRect( x, y, width, height );
			out.println( "closepath clip" );
			Iterator iterator = positions.iterator( );
			while ( iterator.hasNext( ) )
			{