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
{
		private int[] imageSource;
		public ArrayImageSource( int width, int height, int[] imageSource )
		{
			super( width, height );
			this.imageSource = imageSource;
		}
		public int getRGB( int x, int y )
		{
			return imageSource[y * width + x];
		}
	}
}