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Greg Pomerantz 84c6a4170d Fix activity-recreation crash: render-thread GPU uploads + per-world lifecycle 
The swipe-up-dismiss + relaunch bug (process survives, activity
re-creates) crashed or left a sparse grid. Root cause chain, fully
documented in docs/BUGS/recreation-stale-textures.md:

- Each android_main (per activity instance) is a fresh Slint world with
  a fresh wgpu device (i-slint-core context is thread-local); the old
  world zombie-parks (Slint 1.18 android backend never delivers
  TerminateWindow/Destroy to it).
- Worker-side GPU uploads + a process-global loader let textures cross
  world/device boundaries: a texture destroyed with its device left a
  stale handle in the registry (wgpu-core assert in transition_resources
  on the render thread) — either killing the process, or, with the
  interim catch_unwind band-aid, keeping a poisoned world alive and
  corrupting the VISIBLE world's imports (the sparse grid). A/B against
  pristine Slint confirmed the mechanism (pristine: 1 self-killing panic
  per recreation + full grid).

Fix:
- gputex rewrite: workers deliver plain RGBA8; the UI drain tick
  uploads to the device captured from the rendering notifier
  (Slint's borrowed-resource contract). Staleness impossible by
  construction. Keepalive thread removed.
- Per-world lifecycle: CURRENT_WORLD gate silences zombie ticks;
  re-init invalidates the dying device + swaps the engine; render
  notifier handles RenderingTeardown/RenderingSetup (in-place cell
  clear — never set_vec mid-render, which desyncs the for-loop).
- Vendor patch surface reduced to the single final-flush hunk
  (catch_unwind guard reverted to pristine).
2026-10-28 20:54:04 -04:00
docs/BUGS Fix activity-recreation crash: render-thread GPU uploads + per-world lifecycle 2026-10-28 20:54:04 -04:00
scripts GPU-resident thumbnails: worker uploads to Slint's wgpu device (gputex) 2026-10-28 10:57:15 -04:00
src Fix activity-recreation crash: render-thread GPU uploads + per-world lifecycle 2026-10-28 20:54:04 -04:00
vendor/i-slint-renderer-skia Root-cause and fix the Mali scroll jank; strip jank-hunt instrumentation 2026-10-28 18:23:50 -04:00
.gitignore M0: Slint gallery scaffold + development hand-off 2026-10-27 12:22:59 -04:00
build.rs M0: Slint gallery scaffold + development hand-off 2026-10-27 12:22:59 -04:00
Cargo.lock Root-cause and fix the Mali scroll jank; strip jank-hunt instrumentation 2026-10-28 18:23:50 -04:00
Cargo.toml Root-cause and fix the Mali scroll jank; strip jank-hunt instrumentation 2026-10-28 18:23:50 -04:00
HANDOFF.md Fix activity-recreation crash: render-thread GPU uploads + per-world lifecycle 2026-10-28 20:54:04 -04:00
LICENSE Initial commit 2026-10-27 12:13:22 -04:00
README.md M1: metadata scan + sqlite DB + placeholder list 2026-10-27 13:28:33 -04:00

README.md

gallery

A high-performance image gallery for Android (primary), Linux and macOS — Rust + Slint 1.18.

Status: M1 (metadata scan + DB) done. See HANDOFF.md — the development hand-off with the full plan: architecture, thumbnail pipeline, milestones M1–M7, Slint gotchas, permission flow, and performance targets. Next: M2 (thumbnail engine).

Build

./scripts/build.sh debug     # debug x86_64 APK + install on emulator
./scripts/build.sh           # release x86_64 (emulator)
./scripts/build.sh aarch64   # release aarch64 (device)
cargo run                    # desktop (Linux needs libfontconfig1 + pkg-config)

Requires: Rust (rustup), cargo-apk2, Android SDK + NDK 27 (see HANDOFF.md §3 for exact paths/env).

License

GPL-3.0 (see LICENSE). Built on Slint, used under the Slint royalty-free license for proprietary apps (see HANDOFF.md §10.4).