FillStyleCanvas = function (ctx, src, altColor, altAlpha)
{
    var fillColor = (altColor) ? altColor : src.fillColor;
    var fillAlpha = (altAlpha) ? altAlpha : src.fillAlpha;

    var red = ((fillColor & 0xFF0000) >>> 16);
    var green = ((fillColor & 0xFF00) >>> 8);
    var blue = (fillColor & 0xFF);

    ctx.fillStyle = 'rgba(' + red + ',' + green + ',' + blue + ',' + fillAlpha + ')';
}
Sets the fillStyle on the target context based on the given Shape.

@method Phaser.GameObjects.Shape#FillStyleCanvas
@since 3.13.0
@private

@param {CanvasRenderingContext2D} ctx - The context to set the fill style on.
@param {Phaser.GameObjects.Shape} src - The Game Object to set the fill style from.
@param {number} [altColor] - An alternative color to render with.
@param {number} [altAlpha] - An alternative alpha to render with.