uint64_t PBD::DEBUG::CanvasItems = PBD::new_debug_bit ("canvasitems");
uint64_t PBD::DEBUG::CanvasItemsDirtied = PBD::new_debug_bit ("canvasitemsdirtied");
uint64_t PBD::DEBUG::CanvasEvents = PBD::new_debug_bit ("canvasevents");
+uint64_t PBD::DEBUG::CanvasRender = PBD::new_debug_bit ("canvasrender");
struct timeval ArdourCanvas::epoch;
map<string, struct timeval> ArdourCanvas::last_time;
int ArdourCanvas::render_count;
+int ArdourCanvas::render_depth;
int ArdourCanvas::dump_depth;
void