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
new Float( .8 ) );
				
				ByteArrayOutputStream ostream = new ByteArrayOutputStream( );
				TranscoderOutput transOutput = new TranscoderOutput( ostream );
				try
				{
					transcoder.transcode( transInput, transOutput );
				}
				catch ( TranscoderException e )
				{
				}
				
				ostream.flush( );
				
				pptOutput.write( base.encode( ostream.toByteArray( ) ) );
			}
		}
		catch ( IOException ioe )
		{
			logger.log( Level.WARNING, ioe.getMessage( ), ioe );
		}
		catch ( Throwable t )
		{
			logger.log( Level.WARNING, t.getMessage( ), t );
		}
	}
	protected ContainerPosition getContainerPosition( )
	{
		ContainerPosition curPos;
		if ( !containerStack.isEmpty( ) )