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Maintain smooth frame rates when ProMotion and direct mode are enabled (#7305)

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This is achieved by starting a `CADisplayLink` that will invoke the
`on_request_frame` callback at the refresh interval of the display.

We only actually draw frames when the window was dirty, or for 2 extra
seconds after the last input event to ensure ProMotion doesn't downclock
the refresh rate when the user is actively interacting with the window.

Release Notes:

- Improved performance when using a ProMotion display with fast key
repeat rates.

---------

Co-authored-by: Nathan Sobo <nathan@zed.dev>
This commit is contained in:
Antonio Scandurra 2024-02-02 16:42:46 -07:00 committed by GitHub
parent f2ba969d5b
commit 15edc46827
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GPG Key ID: B5690EEEBB952194
5 changed files with 50 additions and 37 deletions
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13
crates/gpui/src/app.rs
View File

@ -652,27 +652,20 @@ impl AppContext {
}
}
} else {
for window in self.windows.values() {
if let Some(window) = window.as_ref() {
if window.dirty {
window.platform_window.invalidate();
}
}
}
#[cfg(any(test, feature = "test-support"))]
for window in self
.windows
.values()
.filter_map(|window| {
let window = window.as_ref()?;
(window.dirty || window.focus_invalidated).then_some(window.handle)
(window.dirty.get() || window.focus_invalidated).then_some(window.handle)
})
.collect::<Vec<_>>()
{
self.update_window(window, |_, cx| cx.draw()).unwrap();
}
#[allow(clippy::collapsible_else_if)]
if self.pending_effects.is_empty() {
break;
}
@ -749,7 +742,7 @@ impl AppContext {
fn apply_refresh_effect(&mut self) {
for window in self.windows.values_mut() {
if let Some(window) = window.as_mut() {
window.dirty = true;
window.dirty.set(true);
}
}
}

1
crates/gpui/src/platform.rs
View File

@ -175,7 +175,6 @@ pub(crate) trait PlatformWindow: HasWindowHandle + HasDisplayHandle {
fn on_close(&self, callback: Box<dyn FnOnce()>);
fn on_appearance_changed(&self, callback: Box<dyn FnMut()>);
fn is_topmost_for_position(&self, position: Point<Pixels>) -> bool;
fn invalidate(&self);
fn draw(&self, scene: &Scene);
fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas>;

20
crates/gpui/src/platform/mac/window.rs
View File

@ -16,8 +16,8 @@ use cocoa::{
},
base::{id, nil},
foundation::{
NSArray, NSAutoreleasePool, NSDictionary, NSFastEnumeration, NSInteger, NSPoint, NSRect,
NSSize, NSString, NSUInteger,
NSArray, NSAutoreleasePool, NSDefaultRunLoopMode, NSDictionary, NSFastEnumeration,
NSInteger, NSPoint, NSRect, NSSize, NSString, NSUInteger,
},
};
use core_graphics::display::CGRect;
@ -321,6 +321,7 @@ struct MacWindowState {
executor: ForegroundExecutor,
native_window: id,
native_view: NonNull<id>,
display_link: id,
renderer: MetalRenderer,
kind: WindowKind,
request_frame_callback: Option<Box<dyn FnMut()>>,
@ -522,6 +523,10 @@ impl MacWindow {
let native_view: id = msg_send![VIEW_CLASS, alloc];
let native_view = NSView::init(native_view);
let display_link: id = msg_send![class!(CADisplayLink), displayLinkWithTarget: native_view selector: sel!(displayLayer:)];
let main_run_loop: id = msg_send![class!(NSRunLoop), mainRunLoop];
let _: () =
msg_send![display_link, addToRunLoop: main_run_loop forMode: NSDefaultRunLoopMode];
assert!(!native_view.is_null());
let window = Self(Arc::new(Mutex::new(MacWindowState {
@ -529,6 +534,7 @@ impl MacWindow {
executor,
native_window,
native_view: NonNull::new_unchecked(native_view as *mut _),
display_link,
renderer: MetalRenderer::new(true),
kind: options.kind,
request_frame_callback: None,
@ -687,6 +693,9 @@ impl Drop for MacWindow {
fn drop(&mut self) {
let this = self.0.lock();
let window = this.native_window;
unsafe {
let _: () = msg_send![this.display_link, invalidate];
}
this.executor
.spawn(async move {
unsafe {
@ -1000,13 +1009,6 @@ impl PlatformWindow for MacWindow {
}
}
fn invalidate(&self) {
let this = self.0.lock();
unsafe {
let _: () = msg_send![this.native_window.contentView(), setNeedsDisplay: YES];
}
}
fn draw(&self, scene: &crate::Scene) {
let mut this = self.0.lock();
this.renderer.draw(scene);

2
crates/gpui/src/platform/test/window.rs
View File

@ -282,8 +282,6 @@ impl PlatformWindow for TestWindow {
unimplemented!()
}
fn invalidate(&self) {}
fn draw(&self, _scene: &crate::Scene) {}
fn sprite_atlas(&self) -> sync::Arc<dyn crate::PlatformAtlas> {

51
crates/gpui/src/window.rs
View File

@ -22,7 +22,7 @@ use smallvec::SmallVec;
use std::{
any::{Any, TypeId},
borrow::{Borrow, BorrowMut},
cell::RefCell,
cell::{Cell, RefCell},
collections::hash_map::Entry,
fmt::{Debug, Display},
future::Future,
@ -34,7 +34,7 @@ use std::{
atomic::{AtomicUsize, Ordering::SeqCst},
Arc,
},
time::Duration,
time::{Duration, Instant},
};
use util::{measure, ResultExt};
@ -272,7 +272,8 @@ pub struct Window {
appearance: WindowAppearance,
appearance_observers: SubscriberSet<(), AnyObserver>,
active: bool,
pub(crate) dirty: bool,
pub(crate) dirty: Rc<Cell<bool>>,
pub(crate) last_input_timestamp: Rc<Cell<Instant>>,
pub(crate) refreshing: bool,
pub(crate) drawing: bool,
activation_observers: SubscriberSet<(), AnyObserver>,
@ -342,13 +343,28 @@ impl Window {
let bounds = platform_window.bounds();
let appearance = platform_window.appearance();
let text_system = Arc::new(WindowTextSystem::new(cx.text_system().clone()));
let dirty = Rc::new(Cell::new(false));
let last_input_timestamp = Rc::new(Cell::new(Instant::now()));
platform_window.on_request_frame(Box::new({
let mut cx = cx.to_async();
let dirty = dirty.clone();
let last_input_timestamp = last_input_timestamp.clone();
move || {
measure("frame duration", || {
handle.update(&mut cx, |_, cx| cx.draw()).log_err();
})
if dirty.get() {
measure("frame duration", || {
handle
.update(&mut cx, |_, cx| {
cx.draw();
cx.present();
})
.log_err();
})
} else if last_input_timestamp.get().elapsed() < Duration::from_secs(2) {
// Keep presenting the current scene for 2 extra seconds since the
// last input to prevent the display from underclocking the refresh rate.
handle.update(&mut cx, |_, cx| cx.present()).log_err();
}
}
}));
platform_window.on_resize(Box::new({
@ -427,7 +443,8 @@ impl Window {
appearance,
appearance_observers: SubscriberSet::new(),
active: false,
dirty: false,
dirty,
last_input_timestamp,
refreshing: false,
drawing: false,
activation_observers: SubscriberSet::new(),
@ -488,7 +505,7 @@ impl<'a> WindowContext<'a> {
pub fn refresh(&mut self) {
if !self.window.drawing {
self.window.refreshing = true;
self.window.dirty = true;
self.window.dirty.set(true);
}
}
@ -962,9 +979,10 @@ impl<'a> WindowContext<'a> {
&self.window.next_frame.z_index_stack
}
/// Draw pixels to the display for this window based on the contents of its scene.
/// Produces a new frame and assigns it to `rendered_frame`. To actually show
/// the contents of the new [Scene], use [present].
pub(crate) fn draw(&mut self) {
self.window.dirty = false;
self.window.dirty.set(false);
self.window.drawing = true;
#[cfg(any(test, feature = "test-support"))]
@ -1105,16 +1123,19 @@ impl<'a> WindowContext<'a> {
.clone()
.retain(&(), |listener| listener(&event, self));
}
self.window
.platform_window
.draw(&self.window.rendered_frame.scene);
self.window.refreshing = false;
self.window.drawing = false;
}
fn present(&self) {
self.window
.platform_window
.draw(&self.window.rendered_frame.scene);
}
/// Dispatch a mouse or keyboard event on the window.
pub fn dispatch_event(&mut self, event: PlatformInput) -> bool {
self.window.last_input_timestamp.set(Instant::now());
// Handlers may set this to false by calling `stop_propagation`.
self.app.propagate_event = true;
// Handlers may set this to true by calling `prevent_default`.
@ -2058,7 +2079,7 @@ impl<'a, V: 'static> ViewContext<'a, V> {
}
if !self.window.drawing {
self.window_cx.window.dirty = true;
self.window_cx.window.dirty.set(true);
self.window_cx.app.push_effect(Effect::Notify {
emitter: self.view.model.entity_id,
});