Function CGImageMaskCreate 

pub unsafe extern "C-unwind" fn CGImageMaskCreate(
    width: usize,
    height: usize,
    bits_per_component: usize,
    bits_per_pixel: usize,
    bytes_per_row: usize,
    provider: Option<&CGDataProvider>,
    decode: *const CGFloat,
    should_interpolate: bool,
) -> Option<CFRetained<CGImage>>

👎Deprecated: renamed to CGImage::mask_create

Available on crate features CGDataProvider and CGImage only.