Function leptonica_sys::pixcmapGetDistanceToColor

pub unsafe extern "C" fn pixcmapGetDistanceToColor(
    cmap: *mut PIXCMAP, 
    index: l_int32, 
    rval: l_int32, 
    gval: l_int32, 
    bval: l_int32, 
    pdist: *mut l_int32
) -> l_ok