Function GDALCopyBits 

pub unsafe extern "C" fn GDALCopyBits(
    pabySrcData: *const GByte,
    nSrcOffset: c_int,
    nSrcStep: c_int,
    pabyDstData: *mut GByte,
    nDstOffset: c_int,
    nDstStep: c_int,
    nBitCount: c_int,
    nStepCount: c_int,
)