Update masking behavior: configure the mask to be the lesser of

the maximum size and the actual SWF frame size in each dimensions.

This may break some avatars that were smaller than full size but
drawing a little outside their bounds to the right or bottom. Probably
nobody was actually depending on this bug..


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@265 ed5b42cb-e716-0410-a449-f6a68f950b19

src/as/com/threerings/flash/MediaContainer.as

@@ -209,12 +209,6 @@ public class MediaContainer extends Sprite
         info.addEventListener(IOErrorEvent.IO_ERROR, loadError);
         info.addEventListener(ProgressEvent.PROGRESS, loadProgress);
 
-        // create a mask to prevent the media from drawing out of bounds
-        if (getMaxContentWidth() < int.MAX_VALUE &&
-                getMaxContentHeight() < int.MAX_VALUE) {
-            configureMask(getMaxContentWidth(), getMaxContentHeight());
-        }
-
         // start it loading, add it as a child
         loader.load(new URLRequest(url), getContext(url));
         addChildAt(loader, 0);
@@ -591,11 +585,18 @@ public class MediaContainer extends Sprite
     }
 
     /**
-     * Called when we know the true size of the content.
+     * Called when we know the true size of the content. Subclasses may override and use this
+     * opportunity to do their thing, too.
      */
     protected function contentDimensionsUpdated () :void
     {
-        // nada, by default
+        // update the mask
+        var maxW :int = getMaxContentWidth();
+        var maxH :int = getMaxContentHeight();
+        if ((maxW < int.MAX_VALUE) && (maxH < int.MAX_VALUE)) {
+            // if we should do masking, then mask to the lesser of maximum and actual size
+            configureMask(Math.min(maxW, _w), Math.min(maxH, _h));
+        }
     }
 
     /**