5 Commits
Author SHA1 Message Date
dtourolleandClaude Opus 5 24bf5be574 Compile our own Java into the APK, so the classes Android constructs can exist
The APK's only dex was Slint's. `assemble-apk.sh` found `classes.dex` under
the android-activity backend's build directory and copied it in, and there was
no `javac` step and no `d8` of anything of ours — package.sh's header said so
outright, on the reasoning that the app has no Java because android-activity
calls `android_main` directly.

That reasoning holds for everything the app *calls* and fails for everything
Android *constructs*. A `ContentProvider` is instantiated by the system from
its manifest entry; nothing in the process ever reaches its constructor, so
there is no JNI route to writing one in Rust. The launch `Intent` is the same
shape of problem from the other end: it arrives through `Activity.getIntent()`,
and the activity android-activity hands out is a stock `NativeActivity` rather
than a subclass with room for code. FR-PLAT-AND-6 needs both, and FR-PLAT-AND-4
needs a foreground `Service`, which is a third.

So: everything under `apps/darkroom-android/android/java/` goes through javac
against `android.jar`, and d8 merges the classes with Slint's finished dex into
one `classes.dex`. Merging rather than emitting a second dex keeps the staging
and zip steps as they are — multidex is native at API 28, but two files to keep
in step buys nothing at this size.

The step is skipped when the tree holds no Java, which is the state this commit
leaves it in. Nothing about the APK changes until a `.java` file appears.

`-source 8 -target 8 -bootclasspath android.jar` is not caution about language
features. It is the last combination in which javac allows the boot class path
to be replaced: from `-target 9` the flag is rejected, the platform classes
come from the JDK instead of from android.jar, and the build stays green while
the device raises `NoClassDefFoundError` for a class Android never shipped.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-29 23:18:18 +02:00
dtourolleandClaude Opus 5 2d95807542 Package the models on every platform, not just the phone
The Android bundling landed the weights under that platform's asset directory,
which was the wrong home the moment a second packager wanted them. `makepkg -si`
produced a desktop install with no model at all — the same "no face model is
installed" the phone used to show, for the same reason: nothing put the files
anywhere the app looks.

So `models/face/` at the root is the one copy, and both packagers read it:
assemble-apk.sh bundles it as APK assets, and the PKGBUILD installs it to
/usr/share/darkroom/models. Both refuse an LFS pointer rather than shipping a
130-byte file that fails inside the graph loader on a user's machine.

`face_models` now searches three places, most specific first: the account's own
directory, the shared user directory, then $XDG_DATA_DIRS. So a packaged pair is
found automatically and a pair the user placed by hand still outranks it — which
is what keeps a deliberate choice of weights from being overridden by an
upgrade.

$XDG_DATA_DIRS rather than a hard-coded /usr/share: that is the variable a
distribution, a prefix install or a Nix-style store already sets to say where
its data went, and its documented default is exactly the two paths that would
otherwise have been hard-coded. Empty on Android, which has no such directories
— there the APK's copy is unpacked into the shared user directory instead,
because an asset inside a package is not a path anything can read from.

Verified: the APK still carries both models at assets/models/, the PKGBUILD
parses and installs from the new path, 467 tests pass.

Includes the pkgver 0.6.0 → 0.7.0 bump that was already sitting uncommitted in
the working tree.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-27 18:05:23 +02:00
dtourolleandClaude Opus 5 eaafacc3fb Give the phone the model it had no way to obtain
Face indexing was compiled into the APK all along — dr-ui takes dr-face with
`inference` on every target, so SCRFD, alignment, MBF, calibration and
clustering were all in there. What was missing was the weights, and on Android
there was no way to supply them.

Route C (docs/faces.md §2.2) says the user obtains the model and the app loads
it. On a desktop that is a real gesture: drop two files in
~/.local/share/darkroom/models/ and indexing starts working. On Android it is
not a gesture at all. `internal_data_path` is app-private, `run-as` needs a
debuggable build, and the in-app fetch route C specifies was never built — so
the settings page reported "no face model is installed" on every launch with
nothing behind the message. Not "off until you supply weights"; off.

So the shape-fixed pair goes into LFS under the APK's assets, assemble-apk.sh
copies it into the package, and `android_main` unpacks it to the shared models
directory before anything asks whether a model is present.

Three things that are not incidental:

The models directory is now shared across accounts rather than per-account.
Weights are identified by `faces.model_id`, not by who is signed in, so two
accounts had no reason to hold two copies — and the unpack runs before any
session exists to key a per-account path off. `face_models` still prefers a
per-account directory when one is populated, so anyone mid-migration keeps the
ability to pin one library to its own pair.

The unpack writes under a temporary name and renames. `face_models` decides
availability on `is_file()` alone, so a copy truncated by the process being
killed would leave a file that passes that test and fails inside tract —
reported to the user as a broken model rather than a missing one.

assemble-apk.sh refuses an LFS pointer. At ~130 bytes it looks exactly like a
model to `cp`, and unchecked it reaches the device and fails in the graph
loader instead of telling someone to run `git lfs pull` — the same guard
dr-segment's build script applies to yolo26n-seg.onnx.

The licensing half is unchanged and recorded in §2.2a: the InsightFace grant is
research-only, this is a private repository and a self-installed build, and
these files come back out before anything is published. The weights are still
not a cargo build input — dr-face has no `models/` directory and no
`embedded-model` feature, and nothing in the build reads them. The APK assembly
step copies two files and is the only thing in the tree that knows they exist.

Verified on device: both models unpack on first launch (2524817 and 13616095
bytes) and the APK carries them at assets/models/.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-27 13:18:07 +02:00
dtourolleandClaude Opus 5 b044a8c067 Build the Android CI image in CI, not on a laptop
The Android job ran in gitea.tourolle.paris/dtourolle/darkroom-android:latest,
a tag that had never been pushed. The image existed only as a local
darkroom-android:latest on one machine, so every Android job died at docker
pull with "manifest unknown" before reaching a step. The registry API confirms
it: that manifest is a 404 while the other builder images answer 200.

android-image.yml now builds and pushes it, following KPN's docker.yaml — host
runner rather than a container, so it has the Docker daemon and the host's
cached registry credentials, and a plain-git checkout because that host has no
Node for actions/checkout.

Where it diverges from KPN: that workflow gates on dorny/paths-filter running
inside the builder image, which here would need the very image that is missing.
The tag is the git tree hash of docker/android instead, which changes when and
only when a file there changes. An unrelated push reuses the image, a Dockerfile
edit cannot keep serving a stale latest, and a missing tag rebuilds itself
without a manual step.

The presence probe is curl against the registry API, not `docker manifest
inspect`. The latter exits 1 on this registry even for tags that are plainly
there — jellytau-builder:latest answers HTTP 200 while docker reports "manifest
unknown" for it — and trusting it would have rebuilt 7 GB on every push. The
HEAD request also yields Docker-Content-Digest, so latest is repointed only when
the digests actually disagree, without pulling any layers.

A probe that cannot authenticate falls through to building. Rebuilding when it
was unnecessary costs minutes; skipping a build that was needed is the failure
this commit exists to remove.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-16 14:59:57 +02:00
dtourolle 82a5e21ec6 Initial workspace: GPU context, compute pass, adaptive Slint shell
Establishes the v0.1 foundations on both platforms:

- dr-types: SourceRef (never a filesystem path — Android SAF has none),
  Format, Availability, Validator with ETag quote normalisation
- dr-gpu: wgpu device, compute pass writing a storage texture, resize
- dr-ui: Slint shell with FR-UI-1 adaptive layout, computed in Rust to
  avoid a binding loop
- docker/android: pinned toolchain, verified producing API 28 ARM binaries

Measured the cost of the temporary CPU readback path (dr-gpu bench):
compute is 0.06-0.28ms across sizes while readback is 0.63-7.43ms, so
readback is 90-96% of frame time and scales with area. Recorded in
ARCH §6.1 — this is why spike S1 is the priority.

Mitigations pending S1: reuse the staging buffer, apply at most one
resize per frame, and cap render resolution at 2048 on the long edge.

10 tests passing; core crates cross-compile for aarch64-linux-android.
2026-08-09 07:42:05 +02:00