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
intrinsicFonts.add( TIMES_BOLDITALIC );
		intrinsicFonts.add( ZAPFDINGBATS );
	}
	public static boolean isIntrinsicFont( String fontName )
	{
		return intrinsicFonts.contains( fontName );
	}
	/**
	 * Constructor.
	 * 
	 * @param out
	 *            Output stream for PostScript output.
	 * @param title
	 *            title of the postscript document.
	 */
	public PostscriptWriter( OutputStream o, String title )
	{
		out = new PrintStream( o );
		emitProlog( title );
		FontHandler.prepareFonts( );
	}
	public void clipRect( float x, float y, float width, float height )
	{
		y = transformY( y );
		
		out.println( x + " " + y + " moveto" );
		out.println( ( x + width ) + " " + y + " lineto" );
		out.println( ( x + width ) + " " + ( y - height ) + " lineto" );
		out.println( x + " " + ( y - height ) + " lineto" );
		out.println( x + " " + y + " lineto" );