On 07/01/2010, at 4:21 AM, David Blanton wrote:

>                                                  bytesPerRow:(4 * 
> m_frameRect.size.width)
>                                                  bitsPerPixel:32];


Apart from what others have said, you can pass 0 for these parameters and they 
get calculated for you. That's usually safest because any inconsistency among 
the parameters throws an exception.

--Graham


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