The number of bits per sample in the object (if the object is a planar image, this property contains the number of bits per sample per plane).
- macOS 10.0+
The number of bits used to specify each component of data in a single pixel (for example, a value of 8 for an RGBA image means that each pixel is comprised of four 8-bit values) or
A subclass can set this property when loading image data to notify the parent class of how many bits each sample uses. Specifying a value that differs from the actual image data does not change the bit depth of the image.