feat: llimphi standalone — framework UI soberano extraído del monorepo
Motor gráfico Llimphi como workspace independiente: bucle Elm (input→update→view→layout→raster→present) sobre wgpu+vello+taffy+parley. Núcleo (hal/raster/layout/text/ui/theme/surface/motion/icons) + ~40 widgets + módulos, sin dependencias al resto del monorepo. cargo check --workspace pasa (64 crates). Puerta de entrada: cargo run -p llimphi-ui --example counter. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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//! Demo Tier 1 Android: pinta la pantalla con LEAD_GRAY usando llimphi-hal.
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//!
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//! Logging exhaustivo en cada paso del bootstrap para diagnosticar
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//! cuelgues en device real desde `adb logcat -s llimphi-android:V`.
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//! Panic hook captura backtraces a logcat — sin esto el crash es
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//! invisible (Android cierra el proceso silenciosamente).
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//!
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//! Orden de inicialización en `resumed`:
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//! 1. crear Window via winit
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//! 2. crear wgpu::Instance
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//! 3. crear Surface con la NativeWindow
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//! 4. request_adapter pasándole compatible_surface=Some(&surface)
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//! 5. request_device
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//! 6. configurar surface (formato, tamaño)
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//! 7. crear textura intermedia + blitter (llimphi-hal::WinitSurface)
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//!
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//! El orden 3 antes que 4 es lo que **garantiza** que el adapter
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//! elegido sabe presentar a esa NativeWindow concreta. Llamar
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//! `Hal::new(None)` (como hacía la primera versión) elige un adapter
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//! "cualquiera" y después la creación de surface puede fallar — o
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//! peor, parecer OK y crashear en el primer `present`.
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use std::sync::Arc;
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use std::time::Instant;
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use llimphi_hal::winit::application::ApplicationHandler;
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use llimphi_hal::winit::event::WindowEvent;
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use llimphi_hal::winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
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use llimphi_hal::winit::window::{Window, WindowAttributes, WindowId};
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use llimphi_hal::{wgpu, Hal, Surface, WinitSurface};
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const LEAD_GRAY: wgpu::Color = wgpu::Color {
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r: 0.235,
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g: 0.239,
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b: 0.247,
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a: 1.0,
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};
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const TAG: &str = "llimphi-android";
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struct State {
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window: Arc<Window>,
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hal: Hal,
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surface: WinitSurface,
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}
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struct App {
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state: Option<State>,
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frames: u64,
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last_report: Instant,
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}
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impl App {
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fn new() -> Self {
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Self {
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state: None,
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frames: 0,
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last_report: Instant::now(),
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}
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}
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/// Bootstrap: crea el estado completo o devuelve un mensaje
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/// explicando dónde falló. **No panic-ea** — los panics en
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/// `android_main` arrancan la cierre del proceso antes que el
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/// logcat flushee.
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fn boot(&self, event_loop: &ActiveEventLoop) -> Result<State, String> {
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log::info!("[boot] 1/7 creando Window");
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let window = event_loop
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.create_window(WindowAttributes::default().with_title("llimphi · clear_screen"))
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.map_err(|e| format!("create_window: {e}"))?;
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let window = Arc::new(window);
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let size = window.inner_size();
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log::info!(
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"[boot] window ok · inner_size = {}x{}",
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size.width,
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size.height
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);
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log::info!("[boot] 2/7 creando wgpu::Instance");
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let instance = wgpu::Instance::new(&wgpu::InstanceDescriptor {
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backends: wgpu::Backends::all(),
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..Default::default()
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});
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log::info!("[boot] instance ok · backends activos = {:?}", instance);
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log::info!("[boot] 3/7 creando Surface contra la NativeWindow");
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let surface = instance
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.create_surface(window.clone())
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.map_err(|e| format!("create_surface: {e}"))?;
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log::info!("[boot] surface creada");
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log::info!("[boot] 4/7 request_adapter (compatible_surface=Some)");
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let adapter = pollster::block_on(instance.request_adapter(&wgpu::RequestAdapterOptions {
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power_preference: wgpu::PowerPreference::HighPerformance,
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force_fallback_adapter: false,
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compatible_surface: Some(&surface),
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}))
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.ok_or_else(|| "request_adapter devolvió None — sin GPU compatible".to_string())?;
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let info = adapter.get_info();
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log::info!(
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"[boot] adapter ok · backend={:?} name={:?} driver={:?}",
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info.backend,
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info.name,
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info.driver_info
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);
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log::info!("[boot] 5/7 request_device");
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// En Android (Mali/Adreno entry-level) Limits::default suele exceder
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// el hardware. using_resolution recorta lo recortable preservando
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// los counts mínimos (5 storage buffers/stage que vello necesita).
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let limits = wgpu::Limits::default().using_resolution(adapter.limits());
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let (device, queue) = pollster::block_on(adapter.request_device(
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&wgpu::DeviceDescriptor {
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label: Some("clear-screen-android-device"),
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required_features: wgpu::Features::empty(),
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required_limits: limits,
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memory_hints: wgpu::MemoryHints::Performance,
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},
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None,
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))
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.map_err(|e| format!("request_device: {e}"))?;
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log::info!("[boot] device + queue ok");
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log::info!("[boot] 6/7 ensamblando Hal");
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let hal = Hal {
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instance,
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adapter,
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device,
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queue,
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};
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log::info!("[boot] 7/7 envolviendo en WinitSurface (intermediate + blitter)");
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// Crítico: usar `from_surface` (no `new`), pasando la surface que
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// ya creamos en el paso 3. `WinitSurface::new` haría un segundo
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// create_surface contra la misma NativeWindow y Android responde
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// ERROR_NATIVE_WINDOW_IN_USE_KHR → panic.
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let llimphi_surface = WinitSurface::from_surface(&hal, window.clone(), surface)
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.map_err(|e| format!("WinitSurface::from_surface: {e}"))?;
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log::info!("[boot] ✓ bootstrap completo, pidiendo redraw");
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window.request_redraw();
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Ok(State {
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window,
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hal,
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surface: llimphi_surface,
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})
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}
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}
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impl ApplicationHandler for App {
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fn resumed(&mut self, event_loop: &ActiveEventLoop) {
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log::info!("Resumed event");
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match self.boot(event_loop) {
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Ok(state) => self.state = Some(state),
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Err(e) => {
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log::error!("BOOT FAILED: {e}");
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// No exit-amos para que el process siga vivo y se vea el
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// log; el usuario cerrará la app manualmente.
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}
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}
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}
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fn suspended(&mut self, _event_loop: &ActiveEventLoop) {
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log::info!("Suspended event — liberando surface");
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self.state = None;
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}
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fn window_event(
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&mut self,
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event_loop: &ActiveEventLoop,
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_id: WindowId,
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event: WindowEvent,
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) {
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let Some(state) = self.state.as_mut() else {
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return;
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};
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match event {
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WindowEvent::CloseRequested => {
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log::info!("CloseRequested");
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event_loop.exit();
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}
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WindowEvent::Resized(size) => {
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log::info!("Resized → {}x{}", size.width, size.height);
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state.surface.resize(size.width, size.height);
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state.window.request_redraw();
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}
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WindowEvent::RedrawRequested => {
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let frame = match state.surface.acquire() {
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Ok(f) => f,
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Err(e) => {
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log::warn!("acquire falló ({e}); reconfigurando");
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let (w, h) = state.surface.size();
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state.surface.resize(w, h);
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state.window.request_redraw();
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return;
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}
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};
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let mut encoder =
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state
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.hal
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.device
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.create_command_encoder(&wgpu::CommandEncoderDescriptor {
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label: Some("clear_screen-encoder"),
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});
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{
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let _pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
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label: Some("clear_screen-pass"),
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color_attachments: &[Some(wgpu::RenderPassColorAttachment {
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view: frame.view(),
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resolve_target: None,
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ops: wgpu::Operations {
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load: wgpu::LoadOp::Clear(LEAD_GRAY),
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store: wgpu::StoreOp::Store,
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},
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})],
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depth_stencil_attachment: None,
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timestamp_writes: None,
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occlusion_query_set: None,
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});
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}
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state.hal.queue.submit(std::iter::once(encoder.finish()));
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state.surface.present(frame, &state.hal);
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self.frames += 1;
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let elapsed = self.last_report.elapsed();
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if elapsed.as_secs() >= 1 {
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let fps = self.frames as f64 / elapsed.as_secs_f64();
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log::info!("{fps:.1} fps");
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self.frames = 0;
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self.last_report = Instant::now();
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}
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state.window.request_redraw();
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}
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_ => {}
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}
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}
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}
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#[cfg(target_os = "android")]
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fn install_panic_logger() {
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// Sin esto los panic son invisibles: Android mata el proceso antes
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// que la línea de stderr llegue a logcat. set_hook redirige el panic
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// info a log::error que sí sale en logcat (vía android_logger).
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std::panic::set_hook(Box::new(|info| {
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let payload = info
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.payload()
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.downcast_ref::<&str>()
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.copied()
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.or_else(|| info.payload().downcast_ref::<String>().map(|s| s.as_str()))
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.unwrap_or("<unknown panic payload>");
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let location = info
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.location()
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.map(|l| format!("{}:{}:{}", l.file(), l.line(), l.column()))
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.unwrap_or_else(|| "<unknown location>".into());
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log::error!("PANIC at {location} — {payload}");
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// Forzar flush stdio del android_logger (mejor que nada).
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}));
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}
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#[cfg(target_os = "android")]
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#[no_mangle]
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fn android_main(app: android_activity::AndroidApp) {
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android_logger::init_once(
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android_logger::Config::default()
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.with_max_level(log::LevelFilter::Debug)
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.with_tag(TAG),
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);
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install_panic_logger();
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log::info!("android_main START");
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use llimphi_hal::winit::event_loop::EventLoopBuilder;
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use llimphi_hal::winit::platform::android::EventLoopBuilderExtAndroid;
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let event_loop: EventLoop<()> = match EventLoopBuilder::default().with_android_app(app).build()
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{
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Ok(el) => el,
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Err(e) => {
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log::error!("EventLoop::build failed: {e}");
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return;
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}
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};
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event_loop.set_control_flow(ControlFlow::Poll);
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log::info!("event_loop construido, entrando a run_app");
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let mut app_handler = App::new();
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if let Err(e) = event_loop.run_app(&mut app_handler) {
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log::error!("run_app: {e}");
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}
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log::info!("android_main END");
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}
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