funman300
f866299021
The textual attribution to Huub de Beer / xCards / LGPL-3.0 already satisfies the LGPL's notice requirement on its own; the unfilled URL placeholder was the only TODO left in the file. Removed rather than guessed — a confirmed upstream URL can be added in a follow-up when the project owner decides which xCards mirror or fork to point at. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Credits
Solitaire Quest is MIT-licensed (see LICENSE). It is built on top of
the work of many open-source projects and a small handful of third-party
assets. This file lists every component that ships in the binary or in the
assets/ directory.
Code & Framework
| Component | License | Role |
|---|---|---|
| Bevy 0.18 | MIT OR Apache-2.0 | Game engine, ECS, rendering, UI |
| kira 0.12 | MIT OR Apache-2.0 | Audio playback (mixer, sub-tracks, looping ambient) |
| serde / serde_json | MIT OR Apache-2.0 | Serialization for save files and the sync API |
| tokio | MIT | Async runtime for the sync client and server |
| axum 0.8 | MIT | HTTP framework for the self-hosted sync server |
| sqlx 0.8 | MIT OR Apache-2.0 | Compile-time-checked SQLite access on the server |
| reqwest 0.13 | MIT OR Apache-2.0 | HTTP client for the sync provider |
| jsonwebtoken 10 | MIT | JWT issuance and validation |
| bcrypt 0.19 | MIT | Password hashing on the server |
| keyring 4 | MIT OR Apache-2.0 | OS keychain integration for credential storage |
| tower-governor 0.8 | MIT | Rate limiting on /api/auth/* |
| chrono | MIT OR Apache-2.0 | Date / time handling |
| uuid | MIT OR Apache-2.0 | User and session identifiers |
| thiserror | MIT OR Apache-2.0 | Error type derive |
| rand 0.9 | MIT OR Apache-2.0 | Seeded shuffler in solitaire_core |
| png 0.17 | MIT OR Apache-2.0 | PNG encoder used by solitaire_assetgen |
| ab_glyph 0.2 | Apache-2.0 | Glyph rasterization for generated card art |
The full transitive dependency tree (several hundred crates) is captured in
Cargo.lock and reachable via cargo tree. Every crate brought in is
MIT, Apache-2.0, BSD-style, or a dual-licensed combination thereof — no
copyleft code is statically linked into the game binary.
Assets
Card artwork
| File(s) | Source | License |
|---|---|---|
assets/cards/faces/{RANK}{SUIT}.png (52 PNGs) |
xCards @2x artwork | LGPL-3.0 |
assets/cards/backs/back_0.png (bicycle_blue) |
xCards @2x artwork | LGPL-3.0 |
assets/cards/backs/back_1.png – back_4.png |
Original — generated by solitaire_assetgen::gen_art |
MIT (this project) |
xCards is the playing-card artwork bundle by Huub de Beer, published under the
LGPL-3.0. The art is consumed as unmodified PNG files at runtime; the game
binary statically links no LGPL code, so distribution as a self-contained
binary plus the assets/ directory satisfies the LGPL's relinking clause.
Backgrounds
| File(s) | Source | License |
|---|---|---|
assets/backgrounds/bg_0.png – bg_4.png |
Original — generated by solitaire_assetgen::gen_art |
MIT (this project) |
Typography
| File | Source | License |
|---|---|---|
assets/fonts/main.ttf (FiraMono-Medium) |
mozilla/Fira | SIL Open Font License 1.1 |
The OFL permits redistribution and embedding in software so long as the font file itself is not sold standalone. The file ships unmodified.
Audio
All six WAV files in assets/audio/ are original work — there are no
third-party audio samples in this project. They are synthesized
programmatically by solitaire_assetgen/src/bin/gen_sfx.rs, which writes
44.1 kHz mono 16-bit PCM WAVs using a hand-rolled WAV writer (no hound or
dasp dependency). The synthesis stack is entirely additive: sine /
square waves, layered harmonics, deterministic LCG noise, AR envelopes,
and a slow LFO for the ambient track.
| File | Synthesis approach |
|---|---|
card_deal.wav |
Filtered LCG noise with a sweeping low-pass cutoff for a "whoosh" |
card_flip.wav |
High-passed LCG noise under a fast AR envelope |
card_place.wav |
120 Hz sine body + filtered noise click |
card_invalid.wav |
Two dissonant square tones (196 Hz + 207.65 Hz) beating against each other |
win_fanfare.wav |
C-major arpeggio (C5 / E5 / G5 / C6) with sine + 2nd harmonic |
ambient_loop.wav |
55 Hz fundamental with 2nd and 3rd harmonics, modulated by a 0.2 Hz LFO; loop length is chosen so the tone and LFO both complete an integer number of cycles for seamless looping |
Audio files are MIT-licensed alongside the rest of this project.
License Summary
- Project code: MIT — see LICENSE.
- xCards card artwork (52 faces +
back_0.png): LGPL-3.0, redistributed unmodified. The LGPL applies only to those PNG files; it does not extend to the game binary, which links no LGPL code. - FiraMono-Medium font: SIL Open Font License 1.1, redistributed unmodified.
- All other assets (backgrounds, generated card backs, every audio file) are original work covered by this project's MIT license.
If you redistribute Solitaire Quest, you must ship this CREDITS.md and the
LICENSE file alongside the binary so the LGPL and OFL notices remain
visible to end users.