(function( $ ){
    
$.Rect = function( x, y, width, height ) {
    this.x = typeof ( x ) == "number" ? x : 0;
    this.y = typeof ( y ) == "number" ? y : 0;
    this.width  = typeof ( width )  == "number" ? width : 0;
    this.height = typeof ( height ) == "number" ? height : 0;
};

$.Rect.prototype = {
    getAspectRatio: function() {
        return this.width / this.height;
    },

    getTopLeft: function() {
        return new $.Point( this.x, this.y );
    },

    getBottomRight: function() {
        return new $.Point(
            this.x + this.width, 
            this.y + this.height
        );
    },

    getCenter: function() {
        return new $.Point(
            this.x + this.width / 2.0,
            this.y + this.height / 2.0
        );
    },

    getSize: function() {
        return new $.Point( this.width, this.height );
    },

    equals: function( other ) {
        return 
            ( other instanceof $.Rect ) &&
            ( this.x === other.x ) && 
            ( this.y === other.y ) &&
            ( this.width === other.width ) && 
            ( this.height === other.height );
    },

    toString: function() {
        return "[" + 
            this.x + "," + 
            this.y + "," + 
            this.width + "x" +
            this.height + 
        "]";
    }
};

}( OpenSeadragon ));