Update to egui/eframe 0.20.0

[Wumpf]

had to run cargo update to resolve a dependency issue when building with wgpu, keeping those changes here

[Wumpf]

this only works with trunk egui ofc

[coderedart]

one solution is adding wasm-bindgen-futures as dependency.

then just renaming current main fn to fake_main

// this is the new main. use wasm_biindgen_futures to spawn it
#[cfg(target_arch = "wasm32")]
fn main() {
    wasm_bindgen_futures::spawn_local(fake_main());
}
// this is the previous main fn. just add async to it
#[cfg(target_arch = "wasm32")]
pub async fn fake_main() {
}

[coderedart]

In etk crate, i personally just used pollster::block_on as nobody actually runs a game (or any rendering) in async mode.
https://github.com/coderedart/etk/blob/master/crates/egui_backend/src/gfx_backends/wgpu_backend.rs#L106

this will avoid async polluting all the parent functions too (was necessary in etk because GfxBackend trait abstracted over all gfx api backends like opengl + vk etc.. ).

[Wumpf]

pollster::block_on breaks down when using WebGPU as a backend as this actually needs to hand back to the browser during device creation.

[emilk]

@coderedart btw, trunk serve recompiles all dependencies when changing anything in main.rs. This is… very annoying

[emilk]

wasm_bindgen_futures::spawn_local works well, and seems less hacky!

[coderedart]

pollster::block_on breaks down when using WebGPU as a backend as this actually needs to hand back to the browser during device creation.

ooh, good to know. thanks. I completely forgot that webgpu is a thing.

@coderedart btw, trunk serve recompiles all dependencies when changing anything in main.rs. This is… very annoying

I am relieved that its not just me. I just assumed it was rust-analyzer noise because when i pass --release flag, it doesn't recompile deps, but without the flag, it will recompile some dependencies. I will dig deeper today

[coderedart]

@emilk yeah, its rust analyzer clashing with cargo. even without trunk, after a change, running cargo build --target=wasm32-unknown-unknown will trigger full recompilation. if i just edit using vim without RA, then the dependencies are not recompiled.