pub unsafe extern "C" fn ippiAlphaCompColorKey_8u_AC4R(
pSrc1: *const u8,
src1Step: i32,
alpha1: u8,
pSrc2: *const u8,
src2Step: i32,
alpha2: u8,
pDst: *mut u8,
dstStep: i32,
roiSize: IppiSize,
colorKey: *mut u8,
alphaType: u32,
) -> i32