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Re: Removing alpha channel (transparency) from NSImage?

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Re: Removing alpha channel (transparency) from NSImage?

Subject: Re: Removing alpha channel (transparency) from NSImage?
From: Jens Alfke <email@hidden>
Date: Thu, 1 Apr 2010 16:38:57 -0700


On Apr 1, 2010, at 4:29 PM, Laurent Daudelin wrote:

Anybody has a quick way to remove the alpha channel from an NSImage before I save it as a PNG? I've looked everywhere I didn't find anything obvious.

I think you can draw a solid white rectangle over it using the proper compositing mode and it will replace the transparent parts. I can never keep the different compositing modes straight, but I think NSCompositeDestinationOver might work.

—Jens_______________________________________________

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