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.pdf/src/org/eclipse/birt/report/engine/emitter/pdf/PDFPage.java
cbUnder.setColorFill( color );
		cbUnder.rectangle( x, y, width, height );
		cbUnder.fill( );
		cbUnder.restoreState( );
	}
	public void drawBackgroundImage( int x, int y, int width, int height,
			String repeat, String imageUrl, int absPosX, int absPosY )
			throws IOException
	{
		drawBackgroundImage( convertToPoint( x ), convertToPoint( y ),
				convertToPoint( width ), convertToPoint( height ), repeat,
				imageUrl, convertToPoint( absPosX ), convertToPoint( absPosY ) );
	}
	public void drawBackgroundImage( float x, float y, float width,
			float height, String repeat, String imageUrl, float absPosX,
			float absPosY ) throws IOException
	{
		y = transformY( y );
		cbUnder.saveState( );
		Image img = null;
		try
		{
			img = Image.getInstance( imageUrl );
			if ( "no-repeat".equalsIgnoreCase( repeat ) ) 
			{
				TplValueTriple triple = computeTplHorizontalValPair( absPosX,
						x, width, img.scaledWidth( ) );
				float tplOriginX = triple.getTplOrigin( );
				float tplWidth = triple.getTplSize( );
				float translationX = triple.getTranslation( );