Bug 194371 Use page emitter framework to implement ppt emitter.
In order to keep consistent with pdf and postscript, ppt need to use page emitter framework.
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTRender.java
try
			{
				transcoder.transcode( input, output );
			}
			catch ( TranscoderException e )
			{
			}
			
			ostream.flush( );
			
			pptOutput.write( base.encode( ostream.toByteArray( ) ) );
		}
		else
		{
			FileInputStream file = null;
			try
			{
				file = new FileInputStream( imageURI );
			}
			catch ( FileNotFoundException e )
			{
				throw e;
			}
			byte[] data = null;
			if ( file != null )
			{
				try
				{
					data = new byte[file.available( )];
					file.read( data );