Type Definition imagequant::ConvertRowUnsafeFn

type ConvertRowUnsafeFn<UserData> = unsafe extern "C" fn(_: *mut Color, _: c_int, _: c_int, _: *mut UserData);

Generate image row on the fly

output_row is an array width RGBA elements wide. y is the row (0-indexed) to write to the output_row user_data is the data given to Image::new_unsafe_fn()