9-slice scaling a mask

Author: bobocel | Filed under: Tutorials | December 18th, 2009 | 3 comments

If you ever tried to apply 9-slice scaling to a mask, you probably noticed it doesn’t work.

The solution is this:
1. Use a movieclip and apply 9-slice scaling to it. (let’s say mcShape)
2. Add this movieclip into the mask. (so you would have mcMask.mcShape)
3. Apply cacheAsBitmap to mcMask and mcObject, where mcObject is the object you want to mask.
4. Apply the mask with ActionScript: mcObject.mask = mcMask; (do not apply 9-slice scaling to mcMask)

Hope this helps! :-)

This post has 3 comments | Post your comment

jackson

October 1, 2010 at 9:23 am

THANK YOU!

Amer

August 3, 2011 at 10:05 pm

mask_mc.cacheAsBitmap = true;
mc.cacheAsBitmap = true;
mask_mc.width = 800;
mc.mask = mask_mc;

9-Slice scalling not working.

corneliu.chitanu

August 15, 2011 at 6:09 am

Hello,

The 9 slice scaling is not supported by masks so this workaround solves it by setting a movie clip inside that mask. In order to increase the size of the mask you just need to change the width for the movieclip inside the mask and not the width of the actual mask.

So it should be:

mask_mc.object_mc.width = 800;

where object_mc is the movieclip inside the mask_mc which you would apply the 9-slice scaling to.