Obtains the bitmap information associated with a bitmap graphics context.
- iOS 2.0+
- macOS 10.4+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
A bitmap graphics context.
The bitmap info of the bitmap graphics context or
c is not a bitmap graphics context. See CGImage for a description of the
CGBitmapInfo constants that can be returned.
The data returned by the function specifies whether the bitmap contains an alpha channel and how the alpha channel is generated, along with whether the components are floating-point or integer.
Getting Information About Bitmap Contexts
Returns the alpha information associated with the context, which indicates how a bitmap context handles the alpha component.
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