Bug 204235 Background image can not be shown when preview as PPT [1205]
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTWriter.java
{
	protected static Logger logger = Logger.getLogger( PPTRender.class
			.getName( ) );
	/**
	 * Output stream where postscript to be output.
	 */
	private PrintWriter writer = null;
	protected int currentPageNum = 0;
	private int shapeCount = 0;
	protected float pageWidth, pageHeight;
	
	private Map imageNames = new HashMap( );
	private List imageTitles = new ArrayList( );
	
	private Map imageExtensions = new HashMap( );
	
	private Map fileNamesLists = new TreeMap( );
	private Map currentImageData = new HashMap( );;
	public PPTWriter( OutputStream output )
	{
		try
		{
			writer = new PrintWriter(
					new OutputStreamWriter( output, "UTF-8" ), false );
		}
		catch ( UnsupportedEncodingException e )
		{