How to set multiple flags OS/2 fs_selection

[ollimeier]

How do I set multiple flags in the OS/2 table fs_selection, eg. ITALIC and WWS and USE_TYPO_METRICS?
The code below works, but at the end I only have the last one set in the font.

fn main() {
    let path_to_my_font_file = std::path::Path::new("/Users/ollimeier/Documents/Vary-Black.otf");

    let font_bytes = std::fs::read(path_to_my_font_file).unwrap();
    let font = FontRef::new(&font_bytes).expect("failed to read font data");

    let mut os2: Os2 = font.os2().expect("missing 'OS/2' table").to_owned_table();

    os2.fs_selection = SelectionFlags::ITALIC;
    os2.fs_selection = SelectionFlags::WWS;
    os2.fs_selection = SelectionFlags::USE_TYPO_METRICS;

    let new_bytes = FontBuilder::new()
        .add_table(&os2)//(&head)
        .unwrap() // errors if we can't compile 'head', unlikely here
        .copy_missing_tables(font)
        .build();
    
    std::fs::write("/Users/ollimeier/Documents/Vary-Black_mod_20231012_a.otf", &new_bytes).unwrap();
}

Thanks in advance :)
Olli

[rsheeter]

Afk but I'd have guessed fs_selection = SelectionFlags::SOMETHING | SelectionFlags::SOMETHING_ELSE

[ollimeier]

Thanks a lot @rsheeter . That was the right hint. Your example works and a different solution would be:

os2.fs_selection |= SelectionFlags::ITALIC;
os2.fs_selection |= SelectionFlags::WWS;
os2.fs_selection |= SelectionFlags::USE_TYPO_METRICS;
// ...