Commit Graph
14 Commits
Author SHA1 Message Date
dtourolleandClaude Opus 5 2ac069a6b3 Index the library's faces, and group them into people
Wires dr-face to dr-catalog: a background sweep that reads the proxy the
grid already built, detects, aligns, embeds and stores, then a clustering
pass that turns those embeddings into suggested people.

Detection runs on the Large thumbnail tier and nowhere else. That is what
makes the feature affordable -- a browsed library has already paid for
its proxies, so face indexing adds no RAW decode that was not already
happening -- and it is why an image whose proxy is missing is skipped
rather than fetched: requesting one here would put face indexing on the
network path FR-CULL-8 keeps it off.

The sweep keeps no cursor. It asks the catalog what is missing, so it
resumes after process death with no repeated work beyond the in-flight
image, and cancelling is dropping the receiver.

recluster writes only the suggested half. Confirmed faces go in as
anchors and come back untouched, and a cluster of one stays nameless --
naming every stray face would fill the People view with noise the user
then has to dismiss.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-26 20:49:30 +02:00
dtourolleandClaude Opus 5 baa8957e80 Let a photographer choose the film, and remember which one
The stock model rendered correctly and nothing could ask for it. This is
the picker, and the sidecar key that makes the choice outlive the session.

How the choice persists was the open question, and the answer was already
written down twice in sidecar.rs: `rating` is a top-level key "because a
rating is not an edit", and `masks` are one "because a layer is not a
scalar". A stock is that kind of thing -- a choice of material, not a
number a slider moves -- so it is a top-level key too.

It stores the **id**, not an index. Stocks are files that users add, so an
index would mean installing a profile silently changed which film every
existing photograph had been developed on. A name this build has no
profile for still round-trips untouched, because the alternative is that
syncing to an older phone quietly un-develops the picture.

Only the names travel. Turning one back into tables needs the profile
database, which dr-pipeline deliberately does not link, so `Version::apply`
clears the film and the session re-bakes -- after the parameters, because
the bake reads the film's own exposure sliders and the print balance is
solved against them. That is also why moving those sliders rebuilds the
lookup where no other control in the panel does: an enlarger's filtration
depends on how the negative was exposed.

The panel keeps its rule. It still names no operation and still generates
every control from a declared parameter kind; the stock gets a bespoke
control beside those, exactly as the mask stack does, and for the same
reason. The film's exposure and print exposure arrive as ordinary
generated sliders.

Two defaults worth stating. Picking a colour negative prints it, because
an unprinted one is an orange strip and offering that as the first thing
somebody sees after choosing Portra reads as a bug rather than as a
choice -- the toggle is there for anyone who wants the scan. And a paste
carries no film: a preset is a parameter map, and a stock is not a
parameter, so pasting one would paste a choice the clipboard never took.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-25 19:57:41 +02:00
dtourolle 735683b849 wip: ingest 2026-08-22 14:12:40 +02:00
dtourolle 5ecb35864f Put the region map behind the sliders that were already there
A mask layer holds a real develop chain, so the develop panel can edit one
with no new controls: select a layer and the same sliders read and write
its chain instead of the graph's. An operation declared in `ops/` tomorrow
becomes locally adjustable by existing, which is the payoff for making a
layer a chain rather than a handful of special-cased parameters.

`segmentation.rs` joins the two arms into the one thing the view needs.
The model reads the image through a neutral graph rather than the edited
one, so a segmentation survives an exposure change instead of being
invalidated by every slider. Arm B failing is not fatal: a missing or
unreadable model leaves a working watershed map, because refusing to
segment at all would trade a working feature for a strict one.

The overlay colours groups by a golden-angle walk over hue. Deterministic
rather than random, so a region keeps its colour across a level change and
the eye can track it; boundaries drawn black over the fill, because two
adjacent groups landing on near hues read as one region and telling them
apart is the whole reason to look at it.

Clicking the photograph creates the layer if none is selected — that is how
a local adjustment begins, and making the user press "add layer" first
would be a step with no decision in it. Shift-click extends, and clicking a
region already selected removes it, so one gesture both adds and corrects.

`segment-readback` is a new dr-gpu feature and not a loosening of
`readback`. The region-graph transfer is once per image on a worker; the
one AC-8 forbids is per frame in the render loop. Sharing a switch would
have forced a build wanting local masking to unlock the other. F3 still
stands and the feature name says so.
2026-08-22 08:39:17 +02:00
dtourolleandClaude Opus 5 cf8f5b632f Show the develop frame itself, instead of a photocopy of it
The oldest open item in the project (ARCH §6.1, spike S1, AC-8). Every frame
in develop was read off the GPU into a `SharedPixelBuffer` and handed back to
Slint to upload again: ~7 ms at 4K against a 0.28 ms compute pass, 96% of the
frame spent carrying pixels to the CPU and back so they could be drawn where
they already were.

Slint 1.17 will adopt a `wgpu::Texture` directly, and the whole of what that
needs is arrangement rather than code.

**One device, made before the window.** A texture belongs to the device that
allocated it, so the compute passes and the compositor cannot each open their
own. `GpuContext::new_shared` opens one and hands back the instance and
adapter alongside it; `dr_ui::shared_gpu` gives all four to
`BackendSelector::require_wgpu_29(WGPUConfiguration::Manual { .. })`. That
call has to come before the first window, because creating one selects a
backend for you — which is why the GPU is now opened at the top of `run`
rather than two hundred lines down beside the other controllers.

dr-gpu still names no UI type. It hands out raw wgpu and does not ask who is
compositing (ARCH §6.5a).

**Vulkan only on the shared path**, where headless keeps its GL fallback.
wgpu's GL backend reaches its display through EGL at instance creation, and
before a window exists there is no display handle to give it — so a GL
instance cannot later produce the window surface Slint needs from it. A
machine with no Vulkan gets no shared device and browses without develop,
which is the same degradation as no adapter at all.

**`renderer-femtovg` becomes `renderer-femtovg-wgpu`.** The old one is FemtoVG
over OpenGL and cannot be handed a wgpu texture at all. It is not kept
alongside as a fallback: FemtoVG-over-GL has no branch for an imported
texture, falls through to "render this image into a buffer", gets nothing, and
draws nothing — a blank canvas with no error, which is worse than the failure
it would be papering over. The consequence is stated plainly in the manifest:
the desktop app now needs a working wgpu adapter to open a window.

**Two output textures, not one, and this is the part that is not obvious.**
Slint repaints when the image property *changes*, and it decides that with
`PartialEq` — which for two images over the same `wgpu::Texture` says
"unchanged". A pass that reused a single target would have rendered every
slider move correctly on the GPU and shown none of them: right, and invisible.
`AdjustPass` alternates between two targets, so consecutive frames are
genuinely different values. It also settles the read-while-write question that
one queue was already answering.

`RENDER_ATTACHMENT` is added to both render targets. Neither pass uses it;
Slint rejects an imported texture without it, on the reasoning that a
compositor handed a texture may need to draw into it.

**`AdjustPass::read_output` is deleted rather than gated.** It and
`export_pixels` were the same transfer under two names, and the comments
explaining why they were separate are the point of the whole criterion:
reading pixels back to *display* them is the defect, reading them back to
*encode a file* is the only way a file is made. The display twin is now gone
outright, which is stronger than a feature flag — it cannot be turned back on.
`export_pixels` is untouched and still ungated. The `readback` feature comes
off dr-ui, darkroom-desktop and darkroom-android; it stays in dr-gpu, where it
still gates `RenderTarget::read_pixels` and the segmentation field readback.
`examples/develop` moves to `export_pixels`, which is honest — it writes a
PPM — and so no longer needs the feature.

Four tests, each named for what it protects and each of which fails without a
screen if the property it guards breaks:

- the adjust target satisfies every condition Slint's import checks, asserted
  in the crate that owns the descriptor, because a descriptor that drifts
  fails at runtime on a real display and nothing else would notice;
- consecutive renders are different textures, and the third is the first
  again, so the alternation is a rotation and not an allocation per frame;
- the develop canvas has no CPU pixel buffer and does have a wgpu texture —
  AC-8 itself, in the terms Slint uses;
- consecutive frames compare unequal as `slint::Image`, which is the property
  the repaint actually depends on.

The zoom test's readback moves into the test module. It has to: there is no
library function that copies a displayed frame to the CPU any more, and that
is the point — the round-trip now exists in the test binary and nowhere a
shipping build can reach.

**What is not proven.** No GUI was run. What is verified is that the texture
satisfies the import contract, that the import succeeds, that the canvas is a
texture rather than a buffer, and that consecutive frames are distinguishable.
What is unverified is everything that needs a display: that Slint's FemtoVG
wgpu renderer adopts the Manual configuration on a real surface, that the
picture appears the right way up and the right colour, and the frame timing
that motivated the whole exercise. Android is untouched by testing — the
android backend routes a WGPU29 request to Skia, whose wgpu surface does
handle imported textures, but that is read from the source, not observed.

56 dr-gpu tests and 255 dr-ui tests pass, clippy clean under `-D warnings`,
fmt clean.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-17 09:54:00 +02:00
dtourolleandClaude Opus 5 e00c99b864 Let a photograph leave: an export button, and a cache to leave from
dr-export could turn a frame into bytes and nothing could ask it to. This is
the button, and the place the bytes go.

**Everything is staged first.** An export bound for the server is written to a
local outbox and uploaded afterwards; offline is not a special case, it is the
same path with a drain that finds the server absent. Doing it the other way —
upload directly, stage only on failure — makes the failure path the one that
is rarely exercised and always broken, and a network drop mid-batch leaves
some exports existing and some not with nothing recording which. Staged first,
an export is finished the moment it is written and the upload is a promise
kept later.

The outbox sits beside the catalog rather than under the cache. dr_catalog's
cache already draws that line: passive entries are a convenience and go under
LRU, pinned ones are a promise and never do. An export awaiting upload is a
promise — the user was told it succeeded — and sweeping it for disk would
destroy the only copy. Bytes are written before the destination record, so a
kill between the two leaves an orphan the drain ignores rather than a record
pointing at nothing.

The status line says "Queued for Exports/2026", never "Exported to Nextcloud",
until it has actually landed. There is a test asserting that wording, because
the tempting shorter sentence is a claim the app cannot keep.

The drain runs on the sync pass, before the shards: a thumbnail shard can be
rebuilt from the originals and the catalog is an index, but a queued export
exists nowhere else.

`DevelopSession::render_for_export` renders the framed size rather than reusing
the frame on screen, which is deliberately viewport-sized (FR-DSP-1) — encoding
that would hand the user a soft, screen-sized file with nothing to say anything
had been lost (FR-EXP-9).

One compromise, recorded rather than hidden: the export runs synchronously on
the UI thread, so the window is unresponsive for the few hundred milliseconds
a full-resolution render and encode takes. Moving a DevelopSession and its GPU
pass to a worker is a larger change than one button earns, and it is batch
export that makes the wait intolerable rather than merely noticeable.

Still missing: the Nextcloud folder *picker*. The destination is typed into
Settings for now. `FolderBrowser` in launch.rs is already the reusable model
for it — it browses a remote tree and nothing about it is specific to choosing
a library root — but wiring it into the settings page needs a listing worker
and browser UI there, which is its own piece of work.

Carries in-flight work from a parallel session — presets, the develop copy and
paste, and the node schema's `presentation` and `enum` support. One misplaced
callback in settings_ui.rs is moved from `render` to `wire`: registered in
`render` it borrowed a `&SettingsController` into a 'static closure and would
not compile, and that file's own docs say render pushes properties while wire
connects callbacks.

992 tests pass, clippy and fmt clean. Traceability 48.3% -> 51.0%.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-16 23:58:17 +02:00
dtourolleandClaude Opus 5 fa12afed18 Keep originals on this device, by pin and by use
Build and test / Desktop (Linux) (push) Failing after 1s
Build and test / Android (aarch64) (push) Failing after 0s
Build and test / Layer separation (push) Failing after 1s
Traceability / Requirement traces (push) Failing after 2s
Fills in `image_cache`, which the previous commit's "On this device" filter
read but nothing wrote. Also carries in-flight work that shared these files:
the Android TLS root store, the settings page, and a regenerated
traceability report.

# Two populations, deliberately separate

An original is kept here for one of two reasons, and conflating them produces
the exact failure the feature exists to prevent.

**Pinned** originals were asked for. Pinning a collection before a trip is a
promise, so pinned rows are never evicted and never counted against the
budget — a cap that could silently delete a pinned trip would make pinning
worthless, because it could not be relied on without checking.

**Passively cached** originals are a side effect of working: develop already
downloads the whole file, so keeping it costs no bandwidth and saves the
entire transfer next time. This population is what the budget bounds, evicted
least-recently-used, because it otherwise grows until a day of culling fills
a disk.

Sharing one budget would let a large pin starve the passive cache, or let
browsing evict a pin. They are separate.

# What was built

`dr_catalog::cache` owns the bookkeeping — held tier, size, last use, pinned
— and writes the bytes; deciding to download stays with the caller, which is
what keeps a crate with no network out of the network's business. Files are
written to a temporary and renamed, so a dropped connection cannot leave a
truncated file recorded as a complete original. They are named by image id,
not filename: `Photos/IMG_0001.CR2` and `Trips/IMG_0001.CR2` are different
photographs, and a flat cache keyed on the name would serve one for the other.

`spawn_full_fetch` became read-through. A hit is a disk read; a miss stores
what it downloads and enforces the budget. A cache that cannot be opened is a
miss, not a failure to open the photograph.

Pinning writes intent — `tier_desired` — without downloading, so the button
responds immediately, and `spawn_pin_fetch` fills it in sequentially
afterwards. Sequential because these are tens of megabytes each: the lanes
that make the thumbnail sweep fast buy little against one connection's
bandwidth and cost a great deal of memory. A pin interrupted by a lost
connection resumes from where it stopped.

Schema v5 adds `pinned` and `path`. `pinned` is a column rather than something
inferred from `pinned_by_rule`, which is ON DELETE SET NULL and so cannot
answer for an image whose rule was deleted. A v4 catalog migrates in place;
existing rows default to unpinned, the safe direction.

The budget and "keep opened originals" come from the settings page rather than
a constant, and are applied at startup rather than only on change — a cache
capped at 2 GB last session would otherwise spend this one filling to the
default. Turning off keeping leaves what is already cached readable: those
bytes are paid for, and refusing them would re-download images sitting right
there, including pinned ones.

Also removes a doubled `#[test]` introduced in the previous commit.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-11 21:12:01 +02:00
dtourolleandClaude Opus 5 8b7c1e7f10 Open the sign-in URL through an ACTION_VIEW Intent on Android
The previous commit made the missing launcher honest; this gives Android a real
one, so Login Flow v2 can complete on device.

Builds `new Intent(ACTION_VIEW, Uri.parse(url))` and hands it to
`startActivity` over JNI. The JavaVM and Activity come from ndk_context, which
android-activity's glue populates at startup — the same handle Slint's backend
uses, so there is no second VM to reconcile.

The login worker is a plain std::thread and therefore unknown to the JVM, where
any JNI call would abort the process. jni 0.22 scopes attachment to a closure
rather than returning a guard, so the whole Intent is built and dispatched
inside `attach_current_thread` and the thread detaches on the way out.

Names use `jni_str!` and signatures `jni_sig!`, both compile-time: a typo is a
build error rather than a NoSuchMethodError on the device. A pending Java
exception is checked and cleared before returning, since leaving one pending
makes the next JNI call fail somewhere unrelated; in practice it means
ActivityNotFoundException, i.e. no browser installed.

jni is pinned to 0.22 to match Slint's Android backend.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-09 22:35:38 +02:00
dtourolle 8ad5c86ff9 Add the library, collections, and trash views; theme from style.yaml
The UI gains the views the catalog work was building toward: a windowed
library grid with ratings and flags, the collection tree with drag-to-add,
and trash with restore. derived_sync pushes thumbnail shards and the catalog
snapshot to the server's derived folder.

Tokens now have one source of truth. build.rs reads style.yaml and generates
theme.slint into OUT_DIR, which answers every existing
`import { Theme } from "theme.slint"` unchanged, because Slint resolves
imports against the importing file's directory first and the include paths
after. Generating into OUT_DIR rather than beside the hand-written Slint is
the point: a generated file sitting in ui/ looks exactly like the files
around it that are meant to be edited, and an edit to it would survive until
the next touch of style.yaml — a bug that hides for weeks. build.rs fails
loudly if a stale ui/theme.slint exists, which would otherwise shadow the
generated one silently and make every palette change vanish with no error.

The palette moves to near-neutral dark with achromatic signalling, so the
accent means "modified" or "active" rather than "heading". Shared components
land in widgets.slint: a token that binds several values into one concept is
a component, not a row in a YAML file.

Adds an optional live-style feature that makes the tokens in-out so they can
be written at startup — a feature rather than the default because it stops
the properties being constant-folded.

serde_norway is the YAML crate: serde_yaml and serde_yml are both deprecated,
and its mappings preserve insertion order, which is what lets the generated
Slint keep the token ordering the author chose.

Assisted-by: LLM
2026-08-09 21:11:38 +02:00
dtourolle f630a3ff81 Wire the launch screen into the app
The app now opens on the login screen when there is nothing else to show
— no local paths and no configured library — and goes straight to the
images otherwise. Making someone click past a login they already
completed is pure friction.

  launch.slint       imported by app.slint, replacing the window rather
                     than overlaying it: there is no library to look at
                     until an account is configured
  launch_ui.rs       the Slint wiring, kept out of lib.rs so the launch
                     flow can change without touching the develop window

Login runs on a worker thread and posts results back through a channel,
since Slint's event loop is single-threaded and a 20-minute browser wait
cannot block it. The system browser is opened via xdg-open, never an
embedded webview (FR-NC-1).

Sign-out deletes the local credential even if server-side revocation
fails: a network error must not leave a usable secret on the machine.
Format tick-boxes persist on each toggle, so a selection survives a
crash before the library is opened.

Two things deliberately incomplete rather than faked:

  - "Choose folder" lists the account's folders and reports them, but
    there is no picker widget yet, so selection still happens via the
    connect example.
  - "Open library" logs the request. Opening a remote library needs the
    scan-and-cache path, which belongs with the catalog work in flight.

Earlier I broke the other in-flight dr-ui work by calling
slint_build::compile twice, which replaces the generated module. The
correct wiring is an import inside app.slint, which is what this does.

30 dr-ui tests passing; both launch paths verified by running the app.
2026-08-09 15:34:46 +02:00
dtourolle 09e3043f4c Add secure credential storage, sessions, and a launch screen
Login now persists properly rather than through the JSON file the test
harness was using.

  dr-plat            SecretStore trait plus a Secret Service backend.
                     Verified against the live GNOME Keyring: store,
                     retrieve, delete, confirm-gone all round-trip.
  Session/SessionStore   splits credentials from settings — the app
                     password goes to the keyring (FR-NC-2), while
                     server, login, chosen root and format selection are
                     ordinary config. A test asserts the credential never
                     appears in the config file.
  LaunchModel        the launch-screen state machine, testable without a
                     display server: sign in, approve in browser, choose
                     folder, tick formats, sign out.
  launch.slint       the screen itself, in its own file.

Absence of a secrets daemon is an explicit degraded mode, not a silent
fallback to plaintext — the screen says sign-in will not persist rather
than letting the user find out next launch. Android's Keystore backend
fails loudly for the same reason: a no-op store would look like it
worked and then lose the credential.

Two bugs caught by tests rather than by running it:

  - fail() after busy() signed the user out, because busy() had already
    discarded the session. A failed *scan* would have logged you out.
    Busy now carries the session.
  - normalise_server upgrades http:// to https:// rather than accepting
    it. NFR-SEC-3 requires TLS, and silently sending a credential in the
    clear is not a decision to make on the user's behalf.

launch.slint is not yet wired into app.slint. Calling slint_build::compile
twice replaces the generated module rather than adding to it, which broke
the other in-flight work on dr-ui; I reverted that immediately. Wiring it
needs an import inside app.slint, which is that work's file to change.

419 tests passing across ten crates.
2026-08-09 15:20:39 +02:00
dtourolleandClaude Opus 5 78e3e6b846 Add the develop pipeline: demosaic and seven raw adjustments
Decode through display, on the GPU: black/white normalisation, Bayer
demosaic, camera colour transform, and the first seven adjustment
operations — white balance, exposure, highlights/shadows, blacks/whites,
brilliance, vibrance, saturation.

Composable shaders. Each operation contributes a WGSL fragment rather
than owning a pass, and dr-pipeline fuses the *active* ones into a single
compute shader. One texture read and one write per frame regardless of
how many adjustments are in play, while the operations stay independent
in Rust — adding one is a new file, with no central shader to edit. An
operation at neutral settings contributes no code, no uniform and no
branch. Uniforms are prefixed per operation so two may both declare
`amount`; helpers dedupe by name from a single source of truth.

Pipelines cache on a structure hash covering the op-set and its order but
not the values, so dragging a slider uploads uniforms and reuses the
compiled pipeline. Measured on a 24 MP CR2: 0.60 ms re-render, one
pipeline compiled across ten slider positions.

The UI is generated, not written. EditGraph::capabilities() reports
parameters with their kinds, ranges, defaults and current values; the
panel builds one control per entry chosen by ParamKind. No file in ui/
names an operation, and dr-pipeline has no wgpu dependency, so codegen is
testable without a device (ARCH §6.5a).

Three defects found against real files, each silent:

- rawler 0.7.2's `xyz_to_cam` is all zeros — deprecated and no longer
  populated. The live matrices are in `color_matrix`, keyed by
  illuminant. Reading the old field yields no colour transform at all.
- `cam_to_xyz_normalized()` returns all NaN on any Bayer sensor: it
  divides each of four rows by its own sum, and the unused fourth
  (emerald) row sums to zero. Inverting the 3x3 ourselves avoids it.
  `wb_coeffs[3]` is NaN for the same reason and is normalised at decode.
- As-shot white balance reached the uniform block but no shader read it,
  so the first render of a real CR2 came out violently green. Green
  photosites collect roughly twice the signal of red and blue. Now
  applied unconditionally before any operation, with tests on ordering.

Demosaic is Malvar-He-Cutler rather than bilinear: gradient-corrected
interpolation at one 5x5 neighbourhood per pixel, where bilinear leaves
visible zippering on any high-contrast edge at 1:1. Two of the four
packed CFA constants were wrong on the first attempt, so all four layouts
are asserted to reconstruct the same colour. Crop origins at odd
coordinates re-phase the pattern; without that, red and blue swap.

X-Trans reports GpuError::UnsupportedCfa rather than approximating with
the Bayer path, which would look like a corrupt file.

206 tests, including GPU tests proving every operation and the full
seven-operation chain generate compilable WGSL.

Known gaps: the display path still reads back to the CPU each frame,
which ARCH §6.1 forbids and AC-8 asserts against — it is gated behind the
`readback` feature and waits on spike S1 wiring Slint's texture import.
Curve shapes are a first draft and want tuning against real photographs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-09 11:37:58 +02:00
dtourolle 9717e59909 Add RAW decode and a working image viewer
dr-decode exposes four entry points rather than one decode, because
callers differ sharply in what they need (ARCH §3.2): culling wants a
preview, the grid wants metadata, only develop and export touch sensor
data. Fusing them forces a full decode where a header read suffices,
which is why Lightroom stalls ~2s per image while culling.

Smoke-tested against 1,852 real Canon CR2 files (EOS 6D, ~27MB each):

  metadata      0.2ms   from a 256KB header read, no full decode
  preview     ~250ms   5472x3648, downscaled to 2048 for display
  jpeg          3.0ms

Two findings worth recording:

rawler 0.7.2's CR2 decoder implements only full_image; thumbnail_image
and preview_image are unimplemented trait defaults returning None. So
every rung of the preview ladder resolves to a full-resolution decode at
~250ms — 5x over NFR-P13's 50ms budget. CR2 does carry smaller IFDs, so
the fix is our own IFD walk or an upstream contribution. The ladder is
written now so that fixing it is a decoder change, not a change to every
caller. Recorded in milestone-v0.1 risks.

Preview.downscale_to bounds memory: a 5472x3648 RGBA preview is 79.8MB,
which exhausts a phone's budget after a handful of images. Box-filtered
so downscaled thumbnails do not alias.

Also fixed a RefCell double-borrow that panicked on first navigation —
`*x.borrow_mut() = *x.borrow() + 1` holds both borrows at once. Verified
with 10,000 programmatic navigations.

58 tests passing. Traceability 20.3% (29/143).
2026-08-09 08:28:26 +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