Sylpheed/crates/sylpheed-formats/examples/gp_title_pair_check.rs

//! Is `GP_TITLE.pak` really "8 screens shipped twice, EN/JP"?
//!
//! The Q2 headline says each screen appears twice. The entry dump raised a
//! doubt: entry 11 shows `palogo_gamearts` and entry 14 shows `palogo_seta`,
//! which are different studios, not a language pair. If the two halves of a
//! "pair" declare different sprites, "shipped twice" is the wrong description of
//! at least that pair.
//!
//! CONTROL: a pair known to be a real EN/JP pair must come out as matching. 2/3
//! (the PRESS Ⓐ plate) is byte-identical in size and is the control.
//!
//!     cargo run -p sylpheed-formats --example gp_title_pair_check
use std::collections::BTreeSet;
use std::path::PathBuf;
use sylpheed_formats::{pak::PakArchive, ui_layout};

fn sprites(ar: &PakArchive, i: usize) -> BTreeSet<String> {
    let Ok(by) = ar.read(&ar.entries()[i]) else {
        return BTreeSet::new();
    };
    ui_layout::parse_build(&by)
        .map(|b| b.sprites.keys().cloned().collect())
        .unwrap_or_default()
}

fn main() {
    let root = PathBuf::from(std::env::var("SYLPHEED_DISC").expect("SYLPHEED_DISC"));
    let ar = PakArchive::open(root.join("dat/GP_TITLE.pak")).expect("GP_TITLE.pak");
    let pairs = [
        (0, 1, "loading plain"),
        (2, 3, "PRESS (A) plate [CONTROL]"),
        (4, 7, "title art"),
        (5, 8, "main menu"),
        (6, 9, "EXTRAS"),
        (10, 13, "publisher splash"),
        (11, 14, "developer splash"),
        (12, 15, "loading dressed"),
    ];
    for (a, b, what) in pairs {
        let (sa, sb) = (sprites(&ar, a), sprites(&ar, b));
        let only_a: Vec<_> = sa.difference(&sb).cloned().collect();
        let only_b: Vec<_> = sb.difference(&sa).cloned().collect();
        let shared = sa.intersection(&sb).count();
        let verdict = if only_a.is_empty() && only_b.is_empty() {
            "IDENTICAL SET"
        } else {
            "DIFFERS"
        };
        println!("\n{a:2}/{b:<2} {what:26} {shared:3} shared  {verdict}");
        if !only_a.is_empty() {
            println!("      only in {a}: {only_a:?}");
        }
        if !only_b.is_empty() {
            println!("      only in {b}: {only_b:?}");
        }
    }
}