I'm pretty sure you can do this, the only problem is the bytesPerRow value. Since you need 8 bits to a byte your row size needs to be a multiple of 8 (to make an even number of bytes). If this is undoable, 8bits per sample would be the next smallest and will definitely work.

On Apr 16, 2008, at 7:57 PM, Graham Cox wrote:

Is it possible to create a 1-bit (black and white) NSBitMapImageRep? If so, what are the magic parameters? If not, what is the smallest number of bits per pixel supported?

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