var ComputedSize = { 
width: 0,
height: 0,
displayWidth: { 
get: function (){ 
return this.scaleX * this.width; 
} 
,
set: function (value){ 
this.scaleX = value / this.width; 
} 
}
,
displayHeight: { 
get: function (){ 
return this.scaleY * this.height; 
} 
,
set: function (value){ 
this.scaleY = value / this.height; 
} 
}
}
; 
module.exports = ComputedSize;