The number of bits needed to represent one channel of data in one pixel.
- iOS 7.0+
- macOS 10.9+
- tvOS 9.0+
- watchOS 4.0+
- Mac Catalyst 13.0+Beta
For ARGB8888, this would be 8. Expected values are 1, 2, 4, 5, 8, 10, 12, 16, or 32.
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