1The GNOME canvas is an engine for structured graphics that 2offers a rich imaging model, high performance rendering, and a 3powerful, high-level API. It offers a choice of two rendering 4back-ends, one based on Xlib for extremely fast display, and 5another based on Libart, a sophisticated, antialiased, 6alpha-compositing engine. Applications have a choice between 7the Xlib imaging model or a superset of the PostScript imaging 8model, depending on the level of graphic sophistication 9required. 10