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
catch ( IOException ioe )
		{
			logger.log( Level.WARNING, ioe.getMessage( ), ioe );
		}
	}
	private void exportImageHeader( String imagekey ) throws IOException
	{
		println( "" );
		println( "--___Actuate_Content_Boundary___" ); 
		println( "Content-Location: file:///C:/___Actuate___/"
				+ (String) imageNames.get( imagekey ) + "" );
		println( "Content-Transfer-Encoding: base64" );
		println( "Content-Type: image/"
				+ (String) imageExtensions.get( imagekey ) + "\n" );
	}
	private void generateImageBytes( String imageTitle, byte[] imageData )
			throws IOException
	{
		exportImageHeader( imageTitle );
		Base64 base = new Base64( );
		print( base.encode( imageData ) );
	}
	/**
	 * Creates a new page.
	 * 
	 * @param page
	 *            the PageArea specified from layout
	 */
	public void newPage( float pageWidth, float pageHeight,
			Color backgroundColor )