ReaperOfVeriod
29fdf89f53
Adds texture.rs and makes the pipeline write gs_ram.bin, which it had been skipping. Nothing could be decoded before this: the CLUTs live there. A level texture is not pixels, it is palette indices -- width*height bytes at core_data[textures_base + data_offset], with colour coming from a 256-entry CLUT at gs_ram[palette * 0x100]. gs_ram is a byte range in the level's data extent header at offset 0x10, 518,656 bytes on level 0. Two PS2 conventions have to be honoured and neither is a design choice: within each 32-entry CLUT group the two middle 8-entry blocks are swapped (bits 3 and 4 of the index are exchanged, an involution), and alpha runs 0..=0x80 rather than 0..=255 with 0x80 fully opaque. The mip chain splits across two buffers: levels 0 and 1 are in the texture block with level 1 immediately after level 0, and levels 2 and 3 are resident in gs_ram at mipmap*0x100 and pad*0x100. Tfrag textures are square so every level halves evenly. Verification is two-layered, because every step here is a table lookup and a wrong CLUT remap still produces a well-formed image of the wrong thing. All 1,595 tfrag textures across all 27 levels decode; 96.8% are fully opaque and 96.3% use more than eight colours. On top of that, `gc-extract dump-texture` writes any texture or mip level as a PPM. Level 0 texture 0 comes back as a clean bevelled metal panel with rivets and specular highlights, and texture 74 as a vent grille whose punched windows are fully transparent. That tool is worth keeping: it is the cheapest way to tell a decode that is merely well-formed from one that is right. The hash table is regenerated for the 27 new gs_ram.bin files, now 5,186 files and 5,685,541,143 bytes.
Going Commando
A native PC reimplementation of Ratchet & Clank: Going Commando (PlayStation 2, 2003), written in Rust.
The game is reimplemented, not emulated. There is no MIPS interpreter here and no CPU emulator: the systems are ported to Rust so they run as ordinary native code.
Status: initial scaffold. The disc is identified and verified, the
workspace builds, and nothing else is implemented yet. See
docs/roadmap.md for where things stand and what comes next.
The target
| Game | Ratchet & Clank: Going Commando |
| Platform | PlayStation 2 |
| Disc | SCUS_972.68 v1.01, USA Black Label |
| Video | NTSC, 60 Hz |
| Boot ELF SHA-1 | bacda860cbd6723142e86db56f197e47e728970f |
Verified against a real disc — see docs/disc-identification.md.
This is the build the reference projects pin; Greatest Hits v2.00 is a
different binary and is not the target.
No game content
This repository contains no game assets, no disc images, no BIOS dumps and no proprietary toolchains. You supply your own legally obtained copy of the disc as an input, the way the upstream reference projects do.
A pre-commit hook enforces this, blocking disc images, asset directories, container signatures and files over 50 MiB. If you clone elsewhere, enable it:
git config core.hooksPath .githooks
Layout
crates/
gc-formats/ asset format parsers (pure, no I/O beyond the caller's buffer)
gc-extract/ disc pipeline: identify, unpack, verify
gc-game/ game logic: hero, weapons, moby classes, progression, saves
gc-video/ IPU / MPEG-2 decode
gc-engine/ Bevy app: Graphics Synthesizer, VU0/VU1, renderer, frame loop
docs/
disc-identification.md which disc we build against, verified
roadmap.md phases, gates, current status
plan/ one file per subsystem, written as work proceeds
formats/ format specs, written as formats are reversed
tools/
identify-disc.py identify any Going Commando disc image
vendor/
rerac/ pinned upstream reference checkout (not tracked)
Building
Requires a Rust toolchain via rustup.
cargo check --workspace
cargo test --workspace
The host audio backend is disabled in Cargo.toml (see the comment there) so
that the workspace builds without system ALSA development headers. Audio decode
is the last phase of the port and lives in gc-video; re-enable it and install
alsa-lib-devel when that work starts.
Identifying a disc
python3 tools/identify-disc.py <your-disc.iso>
Reports the serial, version and video mode from SYSTEM.CNF, hashes the boot
executable, and warns when the disc is not the supported build. Reads only a
few megabytes, so it is near-instant.
How it will be verified
Visual and behavioural comparison against PCSX2, replaying recorded input and
comparing frames, level by level. The PS2 float model is reproduced rather than
approximated — see AGENTS.md.
Credits and licensing
This project learns from and is built on the work of others. Licences are
recorded in PROVENANCE.md and notices must travel with any
code derived from them.
- ReRAC — a native Rust/Bevy port of Ratchet & Clank (2002), the first game. ISC. The architecture this project follows.
- OpenRAC / rac2-gc-decomp — matching decompilation research for this game. MIT. Source of verified struct layouts and engine documentation.
- Wrench — community documentation of Insomniac's container formats. GPL, used as a specification reference only; no code is copied.
Ratchet & Clank is a trademark of Sony Interactive Entertainment. This is an unofficial fan project, not affiliated with or endorsed by Sony Interactive Entertainment or Insomniac Games.