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
}
				catch ( IOException e1 )
				{
					throw e1;
				}
			}
			pptOutput.write( base.encode( data ) );
		}
	}
	private void generateImageBytes( IImageContent imageContent )
			throws IOException
	{
		if ( imageContent.getURI( ) == null )
		{
			exportImageHeader( imageContent.getName( ) );
		}
		else
		{
			exportImageHeader( imageContent.getURI( ) );
		}
		boolean isSvg = false;
		TranscoderInput transInput = null;
		Base64 base = new Base64( );
		byte[] imageData = null;
		try
		{
			if ( imageContent.getURI( ) == null )
			{
				imageData = imageContent.getData( );
				if ( imageContent.getExtension( ) != null