On Thu, Apr 24, 2008 at 2:54 PM, Michael Wagner <[EMAIL PROTECTED]> wrote:
> I would like to make a mask / effect  in Flex
> to get from a.bmp using b.bmp as a mask to get c.bmp
> using bitmap operations probably.

If you really need to extract the shape from a bitmap, a quick way to
pull it off is to use an alpha blend mode.   You can even convert the
luminosity into opacity using a simple color matrix filter.

Here's a short example that might help you to do that if you really
want to go that way:
http://rojored.com/code/alpha-blend-mode/AlphaBlendMode.swf

Here's the code for it:
http://rojored.com/code/alpha-blend-mode/

Cheers,

-- 
gabriel montagné láscaris comneno
http://rojored.com
t/506.8392.2040

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