GameJs
diff --git a/‎src/gamejs/pixelcollision.js
+1-1 b/‎src/gamejs/pixelcollision.js
+1-1
@@ -164,7 +164,7 @@ Mask.prototype.overlapMask = function(otherMask, offset) {
       brect.moveIp(offset);
    }
 
-   var mask = new Mask([overlapRect.width, overlapRect.height]);
+   var mask = new Mask(new gamejs.graphics.Surface([overlapRect.width, overlapRect.height]));
    var x,y;
    for (y=overlapRect.top; y<=overlapRect.bottom; y++) {
       for (x=overlapRect.left; x<=overlapRect.right; x++) {
Original file line number	Diff line number	Diff line change
`@@ -164,7 +164,7 @@ Mask.prototype.overlapMask = function(otherMask, offset) {`
`164`	`164`	`brect.moveIp(offset);`
`165`	`165`	`}`
`166`	`166`
`167`		`- var mask = new Mask([overlapRect.width, overlapRect.height]);`
	`167`	`+ var mask = new Mask(new gamejs.graphics.Surface([overlapRect.width, overlapRect.height]));`
`168`	`168`	`var x,y;`
`169`	`169`	`for (y=overlapRect.top; y<=overlapRect.bottom; y++) {`
`170`	`170`	`for (x=overlapRect.left; x<=overlapRect.right; x++) {`