Type Definition graphicsmagick_sys::PixelIteratorMonoModifyCallback

type PixelIteratorMonoModifyCallback = Option<unsafe extern "C" fn(mutable_data: *mut c_void, immutable_data: *const c_void, image: *mut Image, pixels: *mut PixelPacket, indexes: *mut IndexPacket, npixels: c_long, exception: *mut ExceptionInfo) -> c_uint>;