CreateJS の API：線状グラデーション

/* 矩形を線状グラデーションで塗るコード
*/

var corner_radius = 10;
var colors = ["#ff0000", "rgba(0,0,0,1)"];
var ratios = [0, 1];
var x0 = 0;
var y0 = 0;
var x1 = 0;
var y1 = 130
var shape = new createjs.Shape(new createjs.Graphics().beginLinearGradientFill(colors, ratios, x0, y0, x1,y1).drawRoundRect(0, 0, 120, 120, corner_radius));
this.addChild(shape);