574107bc3918e5804e5e54f60d37d56bfdc8bb82
`collection_members.position` and `Sort::CollectionPosition` have been in the catalog since collections were, and nothing above dr-catalog has ever written or read either: `collections::set_order` had no callers, and the grid ordered everything by capture time whatever it was scoped to — dr-ui does not construct a `Query` at all, it has its own `GRID_ORDER` constant. So a manual collection was a set with an order nobody could see or change. Three pieces, because it could not be fewer: `grid_order_for` decides the ordering from the scope, and both readers take it from there. That is the load-bearing part. An ordinal only names a photograph relative to an ordering, so the window read and the span read have to agree — a shift-click resolved through a different ORDER BY than the cells were drawn with selects a different run than the one on screen, and the user finds out when the export runs. `read_ids_span` already stated that invariant about `GRID_ORDER`; this widens it to an ordering that depends on the scope. Only a single manual collection has one. A set draws its descendants' images too, and two children's positions are unrelated integers that interleave arbitrarily; a smart collection has no member rows to carry a position at all. Both fall back to capture time and refuse the drop rather than pretending. The drop is on the cell, on whichever half of it the finger landed — the trailing edge is the only way to name the last place in a collection, since there is no cell beyond the last one to drop in front of. `reordered` is pure and the membership is rewritten whole. `set_order` sets the positions it is given and leaves the rest, so a partial write would interleave the moved run with rows nobody touched; and it is read unfiltered, so what the filter is hiding keeps its place relative to what the user can see. 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: early. v0.1 is a remote library viewer — see docs/milestone-v0.1.md.
Documentation
| Document | Contents |
|---|---|
| requirements.md | What the software must do — 122 numbered requirements |
| architecture.md | How it is built — crates, GPU pipeline, data model, sync |
| milestone-v0.1.md | The first buildable milestone |
| faces.md | Face detection and identity — the models, the licence problem, and what S14 measures |
Building
Desktop:
cargo run -p darkroom-desktop
Android (containerised toolchain, see docker/android):
./docker/android/build.sh cargo ndk -t arm64-v8a build --release
Current state
Working: workspace, GPU context and compute pass, adaptive Slint shell, Android cross-compilation of the core crates.
Not yet working: the zero-copy display path. The build currently uploads frames through the CPU, which is exactly what ARCH §6.1 forbids — measured at 96% of frame time at 4K. Replacing it is spike S1, the project's highest priority.
cargo run -p dr-gpu --example bench --features readback
reproduces that measurement.
Licence
GPL-3.0-or-later.
Releases
20
DarkRoom 0.24.0
Latest
Languages
Rust
86.1%
Slint
10.3%
Python
1.1%
Shell
1%
WGSL
0.9%
Other
0.6%