// get filter chain region
Rectangle2D filterRegion = SVGUtilities.convertFilterChainRegion
(filterElement, filteredElement, filteredNode, ctx);
// make the initial source as a RenderableImage
GraphicsNodeRable sourceGraphic = new GraphicsNodeRable8Bit
(filteredNode, ctx.getGraphicsNodeRenderContext());
// build a FilterChainRable8Bit
FilterChainRable filterChain
= new FilterChainRable8Bit(sourceGraphic, filterRegion);