Function init

examples/hello-mui/js/mui.pullToRefresh.material.js:334–343

(canvas, options)

				rAF && cancelAnimationFrame(rAF);
			}
			var init = function(canvas, options) {
				canvasObj = canvas;
				ctx = canvasObj.getContext('2d');
				var options = $.extend(true, {}, options);
				colors = options.colors;
				duration = options.duration;
				tail_duration = options.tail_duration;
				size = options.size;
				lineWidth = options.lineWidth;
			};
			return {
				init: init,
				drawArcedArrow: drawArcedArrow,