Prepping fillStyle for grads

lib/canvas.js

@@ -145,6 +145,9 @@ Context2d.prototype.createRadialGradient = function(x0, y0, r0, x1, y1, r1){
  */
 
 Context2d.prototype.__defineSetter__('fillStyle', function(val){
+  if (val instanceof CanvasGradient) {
+    return this.setSource(val);
+  } else if ('string' == typeof val) {
     var rgba = exports.parseColor(val) || [0,0,0,1];
     this.lastFillStyle = rgba;
     this.setFillRGBA(
@@ -152,6 +155,7 @@ Context2d.prototype.__defineSetter__('fillStyle', function(val){
       , rgba[1]
       , rgba[2]
       , rgba[3]);
+  }
 });
 
 /**