bevy/examples/wasm/assets_wasm.rs
Carter Anderson 11b41206eb Add upstream bevy_ecs and prepare for custom-shaders merge (#2815)
This updates the `pipelined-rendering` branch to use the latest `bevy_ecs` from `main`. This accomplishes a couple of goals:

1. prepares for upcoming `custom-shaders` branch changes, which were what drove many of the recent bevy_ecs changes on `main`
2. prepares for the soon-to-happen merge of `pipelined-rendering` into `main`. By including bevy_ecs changes now, we make that merge simpler / easier to review. 

I split this up into 3 commits:

1. **add upstream bevy_ecs**: please don't bother reviewing this content. it has already received thorough review on `main` and is a literal copy/paste of the relevant folders (the old folders were deleted so the directories are literally exactly the same as `main`).
2. **support manual buffer application in stages**: this is used to enable the Extract step. we've already reviewed this once on the `pipelined-rendering` branch, but its worth looking at one more time in the new context of (1).
3. **support manual archetype updates in QueryState**: same situation as (2).
2021-09-14 06:14:19 +00:00

68 lines
1.6 KiB
Rust

use bevy::{
asset::{AssetLoader, AssetServerSettings, LoadContext, LoadedAsset},
prelude::*,
reflect::TypeUuid,
utils::BoxedFuture,
};
fn main() {
App::new()
.insert_resource(AssetServerSettings {
asset_folder: "/".to_string(),
})
.add_plugins(DefaultPlugins)
.add_asset::<RustSourceCode>()
.init_asset_loader::<RustSourceCodeLoader>()
.add_startup_system(load_asset)
.add_system(print_asset)
.run();
}
struct State {
handle: Handle<RustSourceCode>,
printed: bool,
}
fn load_asset(mut commands: Commands, asset_server: Res<AssetServer>) {
commands.insert_resource(State {
handle: asset_server.load("assets_wasm.rs"),
printed: false,
});
}
fn print_asset(mut state: ResMut<State>, rust_sources: Res<Assets<RustSourceCode>>) {
if state.printed {
return;
}
if let Some(code) = rust_sources.get(&state.handle) {
info!("code: {}", code.0);
state.printed = true;
}
}
#[derive(Debug, TypeUuid)]
#[uuid = "1c3445ab-97d3-449c-ab35-16ba30e4c29d"]
pub struct RustSourceCode(pub String);
#[derive(Default)]
pub struct RustSourceCodeLoader;
impl AssetLoader for RustSourceCodeLoader {
fn load<'a>(
&'a self,
bytes: &'a [u8],
load_context: &'a mut LoadContext,
) -> BoxedFuture<'a, Result<(), anyhow::Error>> {
Box::pin(async move {
load_context.set_default_asset(LoadedAsset::new(RustSourceCode(String::from_utf8(
bytes.into(),
)?)));
Ok(())
})
}
fn extensions(&self) -> &[&str] {
&["rs"]
}
}