Function libpng_sys::ffi::png_set_pCAL

pub unsafe extern "C" fn png_set_pCAL(
    png_ptr: &png_struct, 
    info_ptr: &mut png_info, 
    purpose: *const c_char, 
    X0: i32, 
    X1: i32, 
    type_: c_int, 
    nparams: c_int, 
    units: *const c_char, 
    params: *mut *mut c_char
)