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Which color space?
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Which color space?

I would like to create an 8-bit grayscale image but I cannot find a color space that uses only 1 8-bit value per pixel.  Everything seems to either be RGB, RGBA, or one color *plus* an alpha channel.

Am I going about this the wrong way?

Thank you in advance,
Simon

    NSBitmapImageRep* outputImageRep = [[NSBitmapImageRep alloc]

                                        initWithBitmapDataPlanes:(unsigned char **)NULL

                                        pixelsWide:(int)[inputImageRep pixelsWide]

                                        pixelsHigh:(int)[inputImageRep pixelsHigh]

                                        bitsPerSample:(int)8

                                        samplesPerPixel:(int)1

                                        hasAlpha:(BOOL)NO

                                        isPlanar:(BOOL)NO

                                        colorSpaceName:(NSString *) ??? *** ???

                                        bytesPerRow:(int)([inputImageRep pixelsWide] * sizeof(unsigned char))

                                        bitsPerPixel:(int)0];

 
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