dtourolle
4c217c9be6
A node that has just been declared can be read, reasoned about and tested, and none of that answers the question a photographer asks first: what does moving this do to the picture. Colour grading, dehaze and the range masks were all argued into the tree on their behaviour and none of them had been *looked* at. So two diagnostics. `sweep` walks one operation from its minimum to its maximum and writes a frame per step; `rangesweep` does the same for a mask band, which is not an ordinary parameter — it lives on a layer, is rasterised by its own pass, and only becomes visible through whatever adjustment the layer carries, so it gets two stops down to make the selection legible. `sweep` names no operation. The id arrives as a string and the parameters and their ranges come from the graph's own capabilities, so a node declared yesterday sweeps on the same terms as one that shipped a year ago — the property `ops/README.md` promises, used rather than asserted. Three things it learned the hard way and now records. It renders through `render_detailed` unconditionally, because the fused path refuses a shader composed with a detail stage rather than rendering it wrongly, and that call falls through when there is no such stage. It takes `SWEEP_HOLD`, because a parameter grouped under one widget is not meaningful alone: a hue with no strength behind it renders the same frame every time, which reads as a broken node rather than a correctly declared neutral. And it bounds the output, since a 25 MP frame is a 75 MB PPM and a sweep is hundreds of them. Both read a rendered file as readily as a raw one, so a JPEG can stand in where no raw is to hand — on the terms `from_rgba8` documents, with the controls still working and their neutral being what the camera left rather than what the sensor recorded.
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.