// the take
rres is a binary file-format spec and single-header C library for packing game assets (images, audio, fonts, raw files) into one container file, created by the raylib author as an XNB-style alternative. It's for game/engine developers who want to ship a single asset blob instead of thousands of loose files, with an optional raylib mapping layer (rres-raylib.h) for actually loading the data into engine structures.
The chunk layout is genuinely simple to parse: one 16-byte file header, then a flat list of self-contained chunks each with a fixed 32-byte info header — no nested tree structure to fight with. The core rres.h has zero raylib dependency, so the format and base loader are usable from any engine; raylib support is a separate thin mapping file on top. The optional Central Directory chunk maps resource IDs back to original filenames, which is a real convenience for debugging or re-extracting assets. There's a working CLI+GUI packer tool (rrespacker) and real example code, not just a spec document nobody implemented.
Compression and encryption are just header fields (compType/cipherType) — the format defines no actual algorithms, so every adopter has to write and keep in sync their own packer-side and loader-side crypto/compression code; the 'security' pitch in the README is aspirational, not something you get for free. Resource IDs are CRC32 hashes of filenames with no collision handling specified beyond 'it's up to the user.' 32-bit offsets cap total file size at ~4GB and chunk count at 65535, which is a real ceiling for a large modern asset pipeline, not just a theoretical one. Outside of raylib, you're writing both the packer and the engine-side loader yourself — there's no second real engine integration to crib from, and the format has had no revisions since v1.0 in 2022 despite ongoing commits.
We read the README, the directory tree and a key source file in October 2026. Nobody pays to be listed. How we judge →