(function($) { 	

	$.idea2image = $.idea2image || {version: '1.0.0'};

	$.idea2image.Geom = {
		getScaler: function (scaleMode,halign,valign,w,h,tw,th) {
			
			var info = {}
			
			var rw = w/tw
			var rh = h/th
			var r
			
		
						
			// get scale ratio
			if (typeof scaleMode  == 'string') {
				switch (scaleMode) {
					case "fill":
					case "fillmax":
						r = rw > rh ? rw : rh
						if (scaleMode == "fill") r = Math.min(1,r)
					break
					case "fit":
					case "fitmax":
						r = rw < rh ? rw : rh
						if (scaleMode == "fit") r = Math.min(1,r)
					break;
					case "none":
						r = 1
					break
				}
			} else {
				r = scaleMode
			}
			
			// scale ration
			info.ratio = r
			
			info.diff = {}
			info.offset = {}
			info.align = {w:halign,h:valign}
			
			// now compute offset with requested alignment
			with (info) {
				diff.w = offset.w = w-tw*r
				diff.h = offset.h = h-th*r
				
				switch (halign) {
					case "center":
						offset.w = diff.w / 2
					break
					case "left":
						offset.w = 0
				}
			
				switch (valign) {
					case "center":
						offset.h = diff.h / 2
					break
					case "top":
						offset.h = 0
				}
				
			}
			
			
			// return the scaler object
			return info
		},
		
		// split a string in object
		splitProps : function(comma,numeric) {
			var token = comma.split(/,/);
			
			return numeric ? { h:parseFloat(token[0]), w:parseFloat(token[1])} : { h:token[0], w:token[1]}
		}
	}	
		
})(jQuery);