/*!
* Raphael Shadow Plugin 0.2
*
* Copyright (c) 2009 Dmitry Baranovskiy (http://raphaeljs.com)
* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
*/
Raphael.shadow = function (x, y, w, h, options) {
// options format: {
// size: 0..1, shadow size
// color: "#000", placeholder colour
// stroke: "#000", placeholder stroke colour
// shadow: "#000", shadow colour
// r: 5, radius of placeholder rounded corners
// }
options = options || {};
var t = ~~(size * .3 + .5),
size = (options.size || 1) * 10,
color = options.color || "#fff",
stroke = options.stroke || color,
shadowColor = options.shadow || "#000",
R = options.r || 3,
s = size,
b = size * 2,
r = b + s,
rg = this.format("r{0}-{0}", shadowColor),
rect = "rect",
circ = "circle",
none = "none";
var res = this([
x - s, y - t, w + (x = s) * 2, h + (y = t) + b,
{type: rect, x: x - s, y: y - t, width: b + s, height: h + y + b, stroke: none, fill: this.format("180-{0}-{0}", shadowColor), opacity: 0, "clip-rect": [x - s + 1, y - t + r, b, h + y + b - r * 2 + .9]},
{type: rect, x: x + w - b, y: y - t, width: b + s, height: h + y + b, stroke: none, fill: this.format("0-{0}-{0}", shadowColor), opacity: 0, "clip-rect": [x + w - s + 1, y - t + r, b, h + y + b - r * 2]},
{type: rect, x: x + b - 1, y: y + h - s, width: w + b, height: b + s, stroke: none, fill: this.format("270-{0}-{0}", shadowColor), opacity: 0, "clip-rect": [x + b, y + h - s, w + b - r * 2, b + s]},
{type: rect, x: x + s - 1, y: y - t, width: w + b, height: b + s, stroke: none, fill: this.format("90-{0}-{0}", shadowColor), opacity: 0, "clip-rect": [x + b, y - t, w + b - r * 2, s + t + 1]},
{type: circ, cx: x + b, cy: y + h - s, r: r, stroke: none, fill: rg, opacity: 0, "clip-rect": [x - s, y + h - s + .999, r, r]},
{type: circ, cx: x + w - b, cy: y + h - s, r: r, stroke: none, fill: rg, opacity: 0, "clip-rect": [x + w - b, y + h - s, r, r]},
{type: circ, cx: x + b, cy: y - t + r, r: r, stroke: none, fill: rg, opacity: 0, "clip-rect": [x - s, y - t, r, r]},
{type: circ, cx: x + w - b, cy: y - t + r, r: r , stroke: none, fill: rg, opacity: 0, "clip-rect": [x + w - b, y - t, r, r]},
{type: rect, x: x, y: y, width: w, height: h, r: R, fill: color, stroke: stroke}
]);
return res[0].paper;
};