dtourolleandClaude Opus 5
13deaa2fbb
FR-DSP-3 states a latency requirement and nothing checked it, which makes it a wish. This adds the check and the measurements it guards. `docs/frame-budget.md` is the bench's output with the reading of §2's decision rule attached. The short version: every point-operation chain at every viewport size, fit and at 1:1, is inside 16 ms at the 99th percentile — the widest is 4.5 ms of GPU at 4K — so FR-DSP-2 should be rewritten rather than implemented. The measurement did find a stage that misses the budget, and it is the one §2 predicted: clarity's 52-pixel separable kernel costs 34 ms at 4K. Tiles make that worse rather than better, since a tiled convolution reads a halo per tile; the fix `local_contrast` already names for itself is a base computed at reduced resolution. The test guards the fused path and says so, at length, rather than quietly excluding the expensive stage and letting the tag imply otherwise (§7). What it asserts is exactly the claim the recommendation rests on: one dispatch over a viewport-sized target, at a full chain, is comfortably inside a frame. Two things the numbers forced: - The two cases are one `#[test]`. As two they ran on a thread each, contended for the same device, and took the 1:1 case from 2.5 ms to 14.9 ms — a measurement of the harness that would have flickered either side of the budget forever. - The CPU half of the frame is judged only in an optimised build. Composition is real per-frame work on the UI thread and belongs in the budget, but the workspace builds its own crates at `opt-level = 0` in dev and `cargo test` is a dev build, so measuring it there measures rustc. The GPU half is asserted either way. Co-Authored-By: Claude Opus 5 <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.