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Don't update when suspended to avoid GPU use on iOS. (#2482)

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# Objective

This fixes a crash caused by iOS preventing GPU access when not focused: #2296

## Solution

This skips `app.update()` in `winit_runner` when `winit` sends the `Suspended` event, until `Resumed`.

I've tested that this works for me on my iOS app.
This commit is contained in:
Dusty DeWeese 2021-07-16 00:50:39 +00:00
parent fbf561c2bb
commit 927973ce6a
1 changed files with 11 additions and 1 deletions
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12
crates/bevy_winit/src/lib.rs
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@ -233,6 +233,8 @@ pub fn winit_runner_with(mut app: App, mut event_loop: EventLoop<()>) {
.get_resource::<WinitConfig>()
.map_or(false, |config| config.return_from_run);
let mut active = true;
let event_handler = move |event: Event<()>,
event_loop: &EventLoopWindowTarget<()>,
control_flow: &mut ControlFlow| {
@ -475,13 +477,21 @@ pub fn winit_runner_with(mut app: App, mut event_loop: EventLoop<()>) {
delta: Vec2::new(delta.0 as f32, delta.1 as f32),
});
}
event::Event::Suspended => {
active = false;
}
event::Event::Resumed => {
active = true;
}
event::Event::MainEventsCleared => {
handle_create_window_events(
&mut app.world,
event_loop,
&mut create_window_event_reader,
);
app.update();
if active {
app.update();
}
}
_ => (),
}