Greg Pomerantz
5a8284e7a9
Slint-on-Mali was conclusively janky at its base level (sltest: 0.33-0.83% slot drops on a scene with no app logic); egui on the same phone measured 3-7x cleaner (egtest: 0.12%, same referee/scene). Architecture (see HANDOFF §8.11-8.12): - winit 0.30 ApplicationHandler on android-activity 0.6, raw EGL (ES3), egui_glow::EguiGlow. winit 0.30 never delivers RedrawRequested on Android → the frame driver is app-owned: World::tick runs every loop iteration from about_to_wait (liveness), render when dirty or animating, park ~8 ms (one vblank) at rest. - Virtualized grid painter (3 cols, visible rows ±4), GPU-resident textures, turbojpeg worker pool decoding off-thread. - CRITICAL pixel-pipeline fix: RGB8→Vec<Color32> conversion happens on the WORKER (egui 0.31's from_rgba_unmultiplied is O(n) per-pixel, 8-60 ms/2 MB on the UI thread → 9.57% drops + phone OOM crash). UI thread only MOVES the vector into ColorImage. - Fling: per-event EMA velocity (frame-based dies at slow touch sampling), clamp 14000 px/s; decay exp(-7.42 dt). - Painter::image uv is NORMALIZED (0..1) — a screen-space uv made every cell a solid rectangle (the emulator's solid-color test images hid it). - Memory caps for a personal phone: full cache 6 entries / 16 MP. Verified on emulator: grid, scroll, fling, viewer, back-key. Phone deploy: thumbnails render, 8580 files. Pending: user finger test + fr_capture phone run (per-pixel fix expected to cut render cost 18.8 ms → <8.3 ms). Deletes: vendor/ (instrumented Slint tree), shim/, build.rs, gputex, vkshim, baseline60, main.slint — the Slint zero-jank campaign is concluded in docs/BUGS/. |
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| docs/BUGS | ||
| harnesses/egtest | ||
| scripts | ||
| shim/out | ||
| src | ||
| tools | ||
| .gitignore | ||
| Cargo.lock | ||
| Cargo.toml | ||
| HANDOFF.md | ||
| LICENSE | ||
| 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).