263 lines
12 KiB
Rust
263 lines
12 KiB
Rust
use std::cell::{Cell, RefCell};
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use std::error::Error;
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use std::rc::Rc;
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use std::time::{Duration, Instant};
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use smithay::backend::renderer::damage::OutputDamageTracker;
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use smithay::backend::renderer::element::RenderElementStates;
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use smithay::backend::renderer::gles::GlesRenderer;
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use smithay::backend::renderer::{Frame, ImportDma, Renderer};
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use smithay::backend::winit::{self, WinitEvent};
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use smithay::desktop::layer_map_for_output;
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use smithay::output::{Mode, Output, PhysicalProperties, Scale, Subpixel};
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use smithay::reexports::calloop::EventLoop;
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use smithay::reexports::calloop::timer::{TimeoutAction, Timer};
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use smithay::reexports::wayland_protocols::wp::presentation_time::server::wp_presentation_feedback::Kind as PresentationKind;
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use smithay::utils::{Clock, Monotonic, Physical, Rectangle, Transform};
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use smithay::wayland::presentation::Refresh;
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use crate::Ferese;
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use crate::metrics::{FrameEffectMetrics, RenderMetrics};
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use crate::render::{animated_window_elements, frame_effect_metrics, layer_surfaces, output_elements, redraw_output};
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pub(crate) type NestedBackend = Rc<RefCell<winit::WinitGraphicsBackend<GlesRenderer>>>;
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type DamageRenderResult = Result<
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(
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Option<Vec<Rectangle<i32, Physical>>>,
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FrameEffectMetrics,
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RenderElementStates,
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),
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Box<dyn Error>,
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>;
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pub fn init(event_loop: &mut EventLoop<Ferese>, state: &mut Ferese) -> Result<(), Box<dyn Error>> {
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let (mut backend, event_source) = winit::init::<GlesRenderer>()?;
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let dmabuf_formats = backend.renderer().dmabuf_formats();
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let display_handle = state.display_handle.clone();
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state
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.dmabuf_state
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.create_global::<Ferese>(&display_handle, dmabuf_formats);
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let initial_scale = normalized_scale(backend.scale_factor());
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let mode = Mode {
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size: backend.window_size(),
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refresh: backend
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.window()
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.current_monitor()
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.and_then(|monitor| monitor.refresh_rate_millihertz())
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.unwrap_or(60_000) as i32,
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};
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let output = Output::new(
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"ferese-winit".into(),
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PhysicalProperties {
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size: (0, 0).into(),
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subpixel: Subpixel::Unknown,
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make: "Ferese".into(),
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model: "Nested".into(),
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},
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);
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output.create_global::<Ferese>(&state.display_handle);
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output.change_current_state(
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Some(mode),
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Some(Transform::Flipped180),
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Some(Scale::Fractional(initial_scale)),
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Some((0, 0).into()),
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);
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output.set_preferred(mode);
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state.space.map_output(&output, (0, 0));
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state.register_output(&output, "nested-primary".to_owned());
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let mut damage_tracker = OutputDamageTracker::from_output(&output);
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let clock = Clock::<Monotonic>::new();
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let mut sequence = 0_u64;
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let mut missed_deadlines = 0_u64;
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let mut render_metrics = RenderMetrics::from_environment(output.name());
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// Do not request a redraw recursively: a no-damage redraw has no EGL
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// submission to pace it and otherwise spins at full CPU. Independently
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// scheduled frames also let clients receive callbacks without damage.
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let refresh = Rc::new(Cell::new(Duration::from_nanos(
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1_000_000_000_000 / mode.refresh.max(1) as u64,
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)));
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let backend = Rc::new(RefCell::new(backend));
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state.nested_backend = Some(backend.clone());
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let redraw_backend = backend.clone();
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let redraw_refresh = refresh.clone();
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event_loop
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.handle()
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.insert_source(Timer::from_duration(refresh.get()), move |_, _, _| {
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redraw_backend.borrow().window().request_redraw();
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TimeoutAction::ToDuration(redraw_refresh.get())
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})?;
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event_loop
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.handle()
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.insert_source(event_source, move |event, _, state| {
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let mut backend = backend.borrow_mut();
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match event {
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WinitEvent::Resized { size, scale_factor } => {
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state.backdrop_generation = state.backdrop_generation.wrapping_add(1);
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let scale = normalized_scale(scale_factor);
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let rate = backend
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.window()
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.current_monitor()
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.and_then(|monitor| monitor.refresh_rate_millihertz())
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.unwrap_or(60_000) as i32;
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refresh.set(Duration::from_nanos(1_000_000_000_000 / rate.max(1) as u64));
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output.change_current_state(
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Some(Mode { size, refresh: rate }),
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None,
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Some(Scale::Fractional(scale)),
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None,
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);
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state.relayout();
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if let Err(error) = state.display_handle.flush_clients() {
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tracing::debug!(%error, "failed to flush output-resize configure");
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}
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backend.window().request_redraw();
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}
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WinitEvent::Input(event) => state.process_input_event(event),
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WinitEvent::Redraw => {
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state.advance_animations(Instant::now());
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let age = backend.buffer_age().unwrap_or(0);
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let render_started = Instant::now();
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let rendered = (|| -> DamageRenderResult {
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{
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let (renderer, mut framebuffer) = backend.bind()?;
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state.process_dmabuf_imports(renderer);
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let elements = animated_window_elements(state, renderer, &output);
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let effects = frame_effect_metrics(&elements, output.current_scale().fractional_scale());
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let result = damage_tracker.render_output(
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renderer,
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&mut framebuffer,
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age,
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&elements,
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[0.035, 0.04, 0.055, 1.0],
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)?;
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let cursorless_capture = state.has_pending_screencopy(&output, false);
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let captured_with_cursor =
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state.process_screencopies(renderer, &framebuffer, &output, true);
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if cursorless_capture {
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let cursorless_elements = output_elements(state, renderer, &output, false);
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redraw_output(renderer, &mut framebuffer, &output, &cursorless_elements)?;
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state.process_screencopies(renderer, &framebuffer, &output, false);
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redraw_output(renderer, &mut framebuffer, &output, &elements)?;
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} else if captured_with_cursor {
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let _ = renderer
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.render(
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&mut framebuffer,
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output.current_mode().expect("output has a mode").size,
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output.current_transform(),
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)?
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.finish()?;
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}
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Ok((result.damage.cloned(), effects, result.states))
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}
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})();
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let (damage, effects, rendered_states) = match rendered {
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Ok((Some(damage), effects, states)) => (damage, effects, states),
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Ok((None, _, _)) => {
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render_metrics.record_no_damage(render_started.elapsed(), missed_deadlines);
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// A callback means permission to draw the next client
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// frame, not proof of a new compositor presentation.
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// No-damage frames must still unblock layer clients.
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send_nested_frame_callbacks(state, &output, refresh.get());
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state.space.refresh();
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state.popups.cleanup();
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layer_map_for_output(&output).cleanup();
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if let Err(error) = state.display_handle.flush_clients() {
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tracing::debug!(%error, "failed to flush clients");
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}
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return;
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}
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Err(error) => {
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tracing::error!(%error, "nested renderer failed");
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state.loop_signal.stop();
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return;
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}
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};
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if let Err(error) = backend.submit(Some(&damage)) {
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tracing::error!(%error, "nested buffer submission failed");
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state.loop_signal.stop();
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return;
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}
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if state.session_lock.active {
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state.lock_frame_presented(&output);
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}
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let elapsed = render_started.elapsed();
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if elapsed > refresh.get() {
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missed_deadlines += (elapsed.as_nanos() / refresh.get().as_nanos()) as u64;
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}
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render_metrics.record_frame(elapsed, &damage, missed_deadlines, effects);
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let mut presentation = crate::presentation::take_output_feedback(
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state,
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&output,
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&rendered_states,
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PresentationKind::Vsync,
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);
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sequence = sequence.wrapping_add(1);
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presentation.presented(
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clock.now(),
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Refresh::fixed(refresh.get()),
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sequence,
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PresentationKind::Vsync,
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);
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send_nested_frame_callbacks(state, &output, refresh.get());
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state.space.refresh();
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state.popups.cleanup();
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layer_map_for_output(&output).cleanup();
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if let Err(error) = state.display_handle.flush_clients() {
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tracing::debug!(%error, "failed to flush clients");
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}
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}
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WinitEvent::CloseRequested => state.loop_signal.stop(),
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_ => {}
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}
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})?;
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Ok(())
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}
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fn send_nested_frame_callbacks(state: &mut Ferese, output: &Output, refresh: Duration) {
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if state.session_lock.active {
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state.lock_frame_callbacks(output);
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return;
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}
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let time = state.start_time.elapsed();
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for window in state.space.elements().filter(|window| {
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state
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.window_ids
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.get(*window)
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.is_some_and(|id| state.window_belongs_to_output(*id, output))
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}) {
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window.send_frame(output, time, Some(refresh), |_, _| Some(output.clone()));
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}
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for layer in layer_surfaces(output) {
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layer.send_frame(output, time, Some(refresh), |_, _| Some(output.clone()));
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}
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state.send_cursor_frame(output);
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}
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fn normalized_scale(scale: f64) -> f64 {
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if scale.is_finite() && scale > 0.0 { scale } else { 1.0 }
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}
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#[cfg(test)]
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mod tests {
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use super::normalized_scale;
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#[test]
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fn accepts_positive_finite_scale() {
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assert_eq!(normalized_scale(1.25), 1.25);
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}
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#[test]
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fn rejects_invalid_scale() {
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assert_eq!(normalized_scale(0.0), 1.0);
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assert_eq!(normalized_scale(f64::NAN), 1.0);
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assert_eq!(normalized_scale(f64::INFINITY), 1.0);
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}
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}
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