cocoa - 32 bit Grayscale Image with CGBitmapContextCreate always Black -

I am using the following code to display a 32 bit grayscale image. Even if I clearly set every pixel to be 4294967297 (which should be white), the end result is always black, what's wrong with me here? The image is just 64x64 pixels.

  CGColorSpaceRef colorSpread = CGColorSpaceCreateDeviceGray (); Ptr = (float *) molk (4 * xDim * yDim); For (i = 0; i    You are using a float component image to make sure that the type of ptr is float * And try to set the value to 0.5f instead of 42 9 4967297.   

 


  






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