pebble/assets/
dependent_asset_plugin.rs

1use crate::{resources::Resources, system::Res};
2
3pub trait Dependencies<'a>: Sized {
4    fn try_gather(world: &'a hecs::World, resources: &'a Resources) -> Option<Self>;
5}
6
7impl<'a> Dependencies<'a> for () {
8    fn try_gather(_world: &'a hecs::World, _resources: &'a Resources) -> Option<Self> {
9        Some(())
10    }
11}
12
13impl<'a, A: 'static + Send + Sync> Dependencies<'a> for Res<'a, A> {
14    fn try_gather(world: &'a hecs::World, resources: &'a Resources) -> Option<Self> {
15        if !resources.has_resource::<A>(world) {
16            return None;
17        }
18
19        Some(Res {
20            data: resources.get_resource(world),
21        })
22    }
23}
24
25impl<'a, A, B> Dependencies<'a> for (Res<'a, A>, Res<'a, B>)
26where
27    A: 'static + Send + Sync,
28    B: 'static + Send + Sync,
29{
30    fn try_gather(world: &'a hecs::World, resources: &'a Resources) -> Option<Self> {
31        if !resources.has_resource::<A>(world) || !resources.has_resource::<B>(world) {
32            return None;
33        }
34
35        Some((
36            Res {
37                data: resources.get_resource(world),
38            },
39            Res {
40                data: resources.get_resource(world),
41            },
42        ))
43    }
44}
45
46// macro_rules! impl_dependent_asset {
47//     ($plugin:ident, $trait_name:ident, $sync_fn:ident, $($dep_ty:ident : $dep_var:ident),+) => {
48//         pub trait $trait_name<B, $($dep_ty),+>: 'static + Send + Sync + Sized
49//         where $($dep_ty: 'static + Send + Sync),+
50//         {
51//             type Source: 'static + Send + Sync;
52//             fn upload(source: &Self::Source, backend: &B, $($dep_var: &$dep_ty),+) -> Self;
53//         }
54//         pub struct $plugin<B, T, $($dep_ty),+>(std::marker::PhantomData<(B, T, $($dep_ty),+)>);
55//         impl<B, T, $($dep_ty),+> $plugin<B, T, $($dep_ty),+> {
56//             pub fn new() -> Self { Self(std::marker::PhantomData) }
57//         }
58//         impl<B, T, $($dep_ty),+> Plugin for $plugin<B, T, $($dep_ty),+>
59//         where
60//             B: 'static + Send + Sync,
61//             $($dep_ty: 'static + Send + Sync,)+
62//             T: $trait_name<B, $($dep_ty),+>,
63//         {
64//             fn build(&self, app: &mut crate::app::App) {
65//                 app.try_insert_resource(Assets::<T::Source>::new());
66//                 app.try_insert_resource(GPUAssets::<T>::new());
67//                 app.add_system(SystemStage::AssetSyncDeps, $sync_fn::<B, T, $($dep_ty),+>);
68//             }
69//         }
70//         #[allow(clippy::too_many_arguments)]
71//         fn $sync_fn<B, T, $($dep_ty),+>(
72//             mut cpu: ResMut<Assets<T::Source>>,
73//             mut gpu: ResMut<GPUAssets<T>>,
74//             backend: Option<Res<B>>,
75//             $($dep_var: Option<Res<$dep_ty>>),+
76//         ) where
77//             B: 'static + Send + Sync,
78//             $($dep_ty: 'static + Send + Sync,)+
79//             T: $trait_name<B, $($dep_ty),+>,
80//         {
81//             let Some(backend) = backend else { return };
82//             $(let Some($dep_var) = $dep_var else { return };)+
83//             for handle in cpu.take_dirty() {
84//                 if let Some(source) = cpu.get(handle) {
85//                     gpu.insert(handle, T::upload(source, &backend, $(&$dep_var),+));
86//                 } else {
87//                     tracing::warn!("Dirty asset handle removed before GPU sync");
88//                 }
89//             }
90//         }
91//     };
92// }
93//
94// impl_dependent_asset!(
95//     DependentAssetPlugin1, DependentUpload1, sync_dependent1,
96//     Dep1: dep1
97// );
98// impl_dependent_asset!(
99//     DependentAssetPlugin2, DependentUpload2, sync_dependent2,
100//     Dep1: dep1, Dep2: dep2
101// );
102// impl_dependent_asset!(
103//     DependentAssetPlugin3, DependentUpload3, sync_dependent3,
104//     Dep1: dep1, Dep2: dep2, Dep3: dep3
105// );
106// impl_dependent_asset!(
107//     DependentAssetPlugin4, DependentUpload4, sync_dependent4,
108//     Dep1: dep1, Dep2: dep2, Dep3: dep3, Dep4: dep4
109// );
pebble/assets/dependent_asset_plugin.rs

pebble/assets/
dependent_asset_plugin.rs
