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
&& imageContent.getExtension( )
								.equalsIgnoreCase( "svg" ) )
				{
					isSvg = true;
				}
			}
			else
			{
				
				switch ( imageContent.getImageSource( ) )
				{
					case IImageContent.IMAGE_FILE :
						if ( imageContent.getURI( ) == null )
							return;
						URL url = reportDesign.findResource( imageContent.getURI( ),
								IResourceLocator.IMAGE );
						InputStream imageInput = url.openStream( );
						if ( imageContent.getURI( ).endsWith( ".svg" ) ) 
						{
							isSvg = true;
							transInput = new TranscoderInput( imageInput );
						}
						imageData = new byte[imageInput.available( )];
						imageInput.read( imageData );
						break;
					case IImageContent.IMAGE_URL :
						if ( imageContent.getURI( ) == null )
							return;
						if ( imageContent.getURI( ).endsWith( ".svg" ) )
						{