dtourolle
31dd86d8c0
Every slider, curve-point and crop-handle drag ran a full render straight from its `moved` handler. A render ends in a blocking GPU readback, so that stall sat directly on the input path: touch events arrive far faster than a render completes, the queue backed up, and positions reached the handlers several samples stale — the jumpy dragging. The worse consequence was gestures being lost outright. When events go unconsumed for long enough Android reclaims the stream and hands it to the view underneath, so a drag stopped mid-gesture never received `up`, only `cancel` — which every handler here treats as "abort the drag". `redraw` no longer renders. It marks the canvas dirty and posts one render onto the event loop, coalescing any further requests that arrive while it is pending, and re-checks the flag afterwards so a value that moved during the render is not left on a stale frame. Handlers now return immediately, which is what keeps the gesture consumed. A zero-delay `Timer` rather than `invoke_from_event_loop`: the latter requires `Send` and this state is deliberately `Rc` on the UI thread. All existing `redraw` call sites are unchanged — the signature is the same and coalescing is internal.
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 |
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.