wasm support

[Aidan-Chelig]

I noticed this plugin doesn't work when compiled to wasm. This is because std::instant isn't supported on wasm aswell as the spin_sleep library. I was wondering if its possible to have a different method of frame pacing when compiling for web that doesn't use the spin_sleep library. so far replacing std::instant with the instant crate gets us part way there.

[aevyrie]

Spin sleep is critical, as the plugin won't work without precise sleep timing. The first step might be forking or PR'ing spin sleep upstream.

[aevyrie]

Looks like the issue is Instant::now(), which is not supported on WASM. This could be fixed by using https://github.com/sebcrozet/instant as a polyfill in spin_sleep and this library.

[aevyrie]

Reopening - Instant::now() still needs to be removed for wasm support. Spin sleep has been removed though.

[aevyrie]

Hm, actually we are switched over to bevy's built-in Instant::now() which should mean this is actually working on wasm, need to test first.

[InfernoStats]

I attempted to use Framepace in my WASM build and it results in this error:

bevy_winit-0.8.1\src\winit_windows.rs:265:19

Stack:

Error
    at imports.wbg.__wbg_new_abda76e883ba8a5f (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f.js:417:21)
    at console_error_panic_hook::Error::new::h57413bb8b3805c00 (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[143326]:0x2933c31)
    at console_error_panic_hook::hook_impl::hdc1902448d002c5b (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[19053]:0x17c7ce2)
    at console_error_panic_hook::hook::hd963d54b60ab1d89 (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[159176]:0x2a0efb2)
    at core::ops::function::Fn::call::he4c4b44ff8004736 (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[134468]:0x28a8942)
    at std::panicking::rust_panic_with_hook::hb09154fa23e06c37 (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[46951]:0x1f6019a)
    at std::panicking::begin_panic_handler::{{closure}}::h6091c197f0d08bf0 (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[63329]:0x220f9af)
    at std::sys_common::backtrace::__rust_end_short_backtrace::h004afb3e6a867c40 (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[183100]:0x2af64ea)
    at rust_begin_unwind (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[150081]:0x2994cbd)
    at core::panicking::panic_fmt::h9e229748e3ae9f9d (http://127.0.0.1:8080/bevy_test-63b38fe71961e48f_bg.wasm:wasm-function[153723]:0x29c632e)