On Mar 20, 2006, at 3:17 PM, Scott Thompson wrote:
Core Graphics doesn't support RGB Bitmap contexts (i.e. ones with
no storage for alpha channel). Set your components to 4 and use
kCGImageAlphaNoneSkipFirst or kCGImageAlphaNoneSkipLast. (depending
on your desires).
P.S. Core Graphics can handle some pixel formats in images that it
doesn't support for CGBitmapContexts. For example, you can create a
CGImage which from RGB (with no alpha) data and make use of it even
though you can't create a CGBitmapContext with that pixel format.
Scott
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