restore global settings function

resemble.js

@@ -23,6 +23,17 @@ URL: https://github.com/Huddle/Resemble.js
 		}
 	};
 
+	var oldOutputSettings = {};
+	var globalOutputSettings = oldOutputSettings;
+
+	function setGlobalOutputSettings(settings) {
+		var msg = 'warning resemble.outputSettings mutates global state, and ' +
+							'will be removed in 3.0.0';
+		console.error(msg);
+		globalOutputSettings = settings;
+		return this
+	}
+
 	var resemble = function( fileData ){
 		var pixelTransparency = 1;
 
@@ -586,40 +597,6 @@ URL: https://github.com/Huddle/Resemble.js
 			return img;
 		}
 
-		function compare(one, two){
-
-			function onceWeHaveBoth(){
-				var width;
-				var height;
-				if(images.length === 2){
-					if( images[0].error || images[1].error ){
-						data = {};
-						data.error = images[0].error ?  images[0].error : images[1].error;
-						triggerDataUpdate();
-						return;
-					}
-					width = images[0].width > images[1].width ? images[0].width : images[1].width;
-					height = images[0].height > images[1].height ? images[0].height : images[1].height;
-
-					if( (images[0].width === images[1].width) && (images[0].height === images[1].height) ){
-						data.isSameDimensions = true;
-					} else {
-						data.isSameDimensions = false;
-					}
-
-					data.dimensionDifference = { width: images[0].width - images[1].width, height: images[0].height - images[1].height };
-
-					analyseImages( normalise(images[0],width, height), normalise(images[1],width, height), width, height);
-
-					triggerDataUpdate();
-				}
-			}
-
-			images = [];
-			loadImageData(one, onceWeHaveBoth);
-			loadImageData(two, onceWeHaveBoth);
-		}
-
 		function outputSettings(options){
 			var key;
 			var undefined;
@@ -655,6 +632,43 @@ URL: https://github.com/Huddle/Resemble.js
 
 		}
 
+		function compare(one, two){
+			if (globalOutputSettings !== oldGlobalSettings) {
+				outputSettings(options);
+			}
+
+			function onceWeHaveBoth(){
+				var width;
+				var height;
+				if(images.length === 2){
+					if( images[0].error || images[1].error ){
+						data = {};
+						data.error = images[0].error ?  images[0].error : images[1].error;
+						triggerDataUpdate();
+						return;
+					}
+					width = images[0].width > images[1].width ? images[0].width : images[1].width;
+					height = images[0].height > images[1].height ? images[0].height : images[1].height;
+
+					if( (images[0].width === images[1].width) && (images[0].height === images[1].height) ){
+						data.isSameDimensions = true;
+					} else {
+						data.isSameDimensions = false;
+					}
+
+					data.dimensionDifference = { width: images[0].width - images[1].width, height: images[0].height - images[1].height };
+
+					analyseImages( normalise(images[0],width, height), normalise(images[1],width, height), width, height);
+
+					triggerDataUpdate();
+				}
+			}
+
+			images = [];
+			loadImageData(one, onceWeHaveBoth);
+			loadImageData(two, onceWeHaveBoth);
+		}
+
 		function getCompareApi(param){
 
 			var secondFileData,
@@ -784,7 +798,7 @@ URL: https://github.com/Huddle/Resemble.js
 			},
 			compareTo: function(secondFileData){
 				return getCompareApi(secondFileData);
-			}
+			},
 			outputSettings: function(options) {
 				outputSettings(options);
 				return rootSelf;
@@ -837,5 +851,6 @@ URL: https://github.com/Huddle/Resemble.js
 		});
 	};
 
+	resemble.outputSettings = setGlobalOutputSettings;
 	return resemble;
 }));