getRGBA = function getRGBA(style) {
    var rxRgb = /rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)/;
    var rxRgba = /rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*([\d.]+)\s*\)/;
    var rxTransparent = /transparent|rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*0+\s*\)/;
    var r, g, b, a;

    if (style.isCanvasGradient === true) {
      style = style.getColor();
    }

    if (!style) {
      return {
        r: 0,
        g: 0,
        b: 0,
        a: 0,
        style: style
      };
    }

    if (rxTransparent.test(style)) {
      r = 0;
      g = 0;
      b = 0;
      a = 0;
    } else {
      var matches = rxRgb.exec(style);

      if (matches !== null) {
        r = parseInt(matches[1]);
        g = parseInt(matches[2]);
        b = parseInt(matches[3]);
        a = 1;
      } else {
        matches = rxRgba.exec(style);

        if (matches !== null) {
          r = parseInt(matches[1]);
          g = parseInt(matches[2]);
          b = parseInt(matches[3]);
          a = parseFloat(matches[4]);
        } else {
          a = 1;

          if (typeof style === "string" && style.charAt(0) !== "#") {
            var rgbColor = new RGBColor(style);

            if (rgbColor.ok) {
              style = rgbColor.toHex();
            } else {
              style = "#000000";
            }
          }

          if (style.length === 4) {
            r = style.substring(1, 2);
            r += r;
            g = style.substring(2, 3);
            g += g;
            b = style.substring(3, 4);
            b += b;
          } else {
            r = style.substring(1, 3);
            g = style.substring(3, 5);
            b = style.substring(5, 7);
          }

          r = parseInt(r, 16);
          g = parseInt(g, 16);
          b = parseInt(b, 16);
        }
      }
    }

    return {
      r: r,
      g: g,
      b: b,
      a: a,
      style: style
    };
  }
Get the decimal values of r, g, b and a

@name getRGBA
@function
@private
@ignore