Bug 137444 Can not preview the old file with PDF
Details: Can not preview the old file with PDF Please run the attached file with PDF, it can not preview. But HTML and web view is no problem.
engine/org.eclipse.birt.report.engine.emitter.pdf/src/org/eclipse/birt/report/engine/emitter/pdf/PDFEmitter.java
private void drawBackgroundColor(Color color, float x, float y, float width, float height)
	{
		if (null == color)
		{
			return;
		}
		cbUnder.saveState();
		cbUnder.setColorFill(color);
		cbUnder.rectangle(x, y-height, width, height);
		cbUnder.fill();
		cbUnder.restoreState();
	}
	
	/**
	 * draw the backgound image at the contentByteUnder of the pdf with the given offset
	 * @param imageURI		the URI referring the image
	 * @param x				the start X coordinate at the pdf where the image is positioned
	 * @param y				the start Y coordinate at the pdf where the image is positioned
	 * @param width			the width of the background dimension
	 * @param height		the height of the background dimension
	 * @param positionX		the offset X percentage relating to start X
	 * @param positionY		the offset Y percentage relating to start Y
	 * @param repeat		the background-repeat property
	 */
	private void drawBackgroundImage(String imageURI, float x, float y, 
			float width, float height, float positionX, float positionY, String repeat)
	{
		
		if ( null == imageURI )
		{