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Set Alpha for an NSImage

Subject: Set Alpha for an NSImage
From: Vance <email@hidden>
Date: Wed, 30 Jan 2008 09:07:48 -0800
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Hi,

I have an NSImage (black and white) that I want to replace the black color with transparency.

I want it to be replaced in such a way, so even the shades of gray look correct when overlayed on top of another color, lets say blue.

What is the best way of do this?

Thanks.
Vance
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References:
	>Named image for regular folder? (From: Jim Correia <email@hidden>)
	>Re: Named image for regular folder? (From: Ken Thomases <email@hidden>)
	>Re: Named image for regular folder? (From: Matt Gough <email@hidden>)

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