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metal: delay rendering until shortly before page flip

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This commit is contained in:
Julian Orth 2024-05-20 15:29:16 +02:00
parent 33d5c61c37
commit c2d31cb639
9 changed files with 113 additions and 22 deletions
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21
src/backends/metal/video.rs
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@ -18,6 +18,7 @@ use {
renderer::RenderResult,
state::State,
theme::Color,
time::now_nsec,
tree::OutputNode,
udev::UdevDevice,
utils::{
@ -45,6 +46,7 @@ use {
indexmap::{indexset, IndexSet},
isnt::std_1::collections::IsntHashMap2Ext,
jay_config::video::GfxApi,
once_cell::sync::Lazy,
std::{
any::Any,
cell::{Cell, RefCell},
@ -416,6 +418,7 @@ pub struct MetalConnector {
pub can_present: Cell<bool>,
pub has_damage: Cell<bool>,
pub cursor_changed: Cell<bool>,
pub next_flip_nsec: Cell<u64>,
pub display: RefCell<ConnectorDisplayData>,
@ -578,6 +581,20 @@ impl MetalConnector {
async fn present_loop(self: Rc<Self>) {
loop {
self.present_trigger.triggered().await;
static DELTA: Lazy<Option<u64>> = Lazy::new(|| {
if let Ok(max_render_time) = std::env::var("JAY_MAX_RENDER_TIME_NSEC") {
if let Ok(max_render_time) = max_render_time.parse() {
return Some(max_render_time);
}
}
None
});
if let Some(delta) = *DELTA {
let next_present = self.next_flip_nsec.get().saturating_sub(delta);
if now_nsec() < next_present {
self.state.ring.timeout(next_present).await.unwrap();
}
}
match self.present(true) {
Ok(_) => self.state.set_backend_idle(false),
Err(e) => {
@ -1397,6 +1414,7 @@ fn create_connector(
active_framebuffer: Default::default(),
next_framebuffer: Default::default(),
direct_scanout_active: Cell::new(false),
next_flip_nsec: Cell::new(0),
});
let futures = ConnectorFutures {
present: backend
@ -2161,6 +2179,9 @@ impl MetalBackend {
connector.schedule_present();
}
let dd = connector.display.borrow_mut();
connector
.next_flip_nsec
.set(tv_sec as u64 * 1_000_000_000 + tv_usec as u64 * 1000 + dd.refresh as u64);
{
let global = self.state.root.outputs.get(&connector.connector_id);
let mut rr = connector.render_result.borrow_mut();