dtourolleandClaude Opus 5
601c984894
Picking the newer of two default versions stopped the wrong edit being shown, but it did not close the split: the losing version stayed in the file, and a device holding disjoint work — a crop made here, an exposure change made there — still contributed only one of the two. Worse, the next write made it larger. `amend` looks its version up by uuid, neither of the two was ours, so the miss minted a *third* `default = 1` block and the file grew one rival per device per photograph. `Sidecar::fuse_default_versions` folds them down. The version with the highest `(revision, modified)` is the accumulator and every other default is merged into it as the remote, which is what makes the fold order-independent — `Version::merge` raises its own revision to `max + 1` as it goes, so merging a chain in ascending order stops being ascending after the first step and a third device would be dropped. Contested values resolve to the winner, disjoint keys survive from both sides because the merge is key-wise, and ratings come across under `merge_judgement`, so a device that never judged the frame cannot erase one that did. The result is a function of the file's bytes alone, so two devices that fuse independently reach the same document and converge instead of overwriting each other. Called wherever a sidecar is parsed: - `amend`, with the write's own uuid, so the fold lands on the identity this device is about to use and the lookup below it hits instead of missing. - `spawn_sidecar_fetch`, so opening a photograph shows everything done to it rather than whichever half won. - `drain_one`, because `merge_into` reconciles by uuid and would otherwise publish the split rather than resolve it. - `presets::load_local` and `save_local` — a local sidecar's folder may be synced by something else entirely, and gets the same split. A file with one default under the expected uuid comes back byte-identical, so this costs nothing on the ordinary write and no sidecar is uploaded merely for having been read. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
DarkRoom
A cross-platform, non-destructive RAW photo editor for Linux and Android.
Status: 0.9.0, and no longer a spike. A library opens, culls, develops and exports on both platforms, across eight tagged releases. What is not built is written down rather than merely absent — see docs/outstanding.md for the requirements that have no implementation and why, and docs/technical-debt.md for the compromises that were chosen.
Documentation
| Document | Contents |
|---|---|
| CONTRIBUTING.md | How to land a first change without reading the rest |
| requirements.md | What the software must do — 179 numbered requirements |
| architecture.md | How it is built — crates, GPU pipeline, data model, sync |
| technical-debt.md | Compromises taken deliberately, each with the condition that retires it |
| outstanding.md | What is not built, and whether that is a decision or a gap |
| code-health.md | What a contribution costs, per seam, measured |
| traceability.md | Generated: which requirement is claimed by which file |
| faces.md | Face detection and identity — the models, the licence problem, and what S14 measured |
Building
Desktop:
cargo run -p darkroom-desktop
Android (containerised toolchain, see docker/android):
./docker/android/build.sh cargo ndk -t arm64-v8a build --release
Git LFS is required for the model weights, and the toolchain pins itself. CONTRIBUTING.md has the details and the four commands CI will run against what you send.
Current state
Working. A catalog over a local folder, a Nextcloud account, or a folder a
sync client keeps in virtual-files mode — where a placeholder is treated as the
photograph rather than as a one-byte file. A virtualised library grid with a
capture-time timeline, ratings, labels, keywords, collections and a trash that
survives a crash mid-operation. Card ingest. Face detection and identity, with
the index syncing between devices. A develop pipeline of fifteen declared
operations fused into a single compute dispatch, plus the neighbourhood
operations that cannot be — clarity, texture, capture sharpening, noise
reduction, lens correction, spectral film simulation. Crop, straighten, spot
removal, gradient and subject-segmentation masks, named presets, and a
generated panel that no operation in ui/ is allowed to name. Export to JPEG,
PNG and 8- or 16-bit TIFF with resize and output sharpening.
The zero-copy display path works on desktop. The compute pass writes a texture that Slint composites directly, which is what ARCH §6.1 requires; the readback it forbids costs 96% of frame time at 4K, and
cargo run -p dr-gpu --example bench --features readback
still reproduces that measurement. The one exception is the Android develop view, which reads the frame back through the CPU because zero-copy there needs wgpu's Vulkan swapchain, and that tears a portrait window on a tablet whose panel is mounted landscape. It is debt, not a revision of the rule: the reasoning, the on-device measurements that forced it, and the three separate things any one of which would remove it are in technical-debt.md TD-1.
Not built. Plugins, compare and survey culling, focus peaking, burst grouping, AI denoise, tiled and progressive rendering, and most of the Android platform integration beyond running. The performance targets in §4.1 are unverified rather than unmet — the per-commit benchmark suite §8 requires does not exist, so nothing fails a build on a regression. docs/outstanding.md is the list, with the reasoning.
Licence
GPL-3.0-or-later.