Redesign `iced_wgpu` layering architecture

1 files changed, 4 insertions, 4 deletions

diff --git a/graphics/src/cached.rs b/graphics/src/cached.rs
index b52f9d9d..1ba82f9f 100644
--- a/graphics/src/cached.rs
+++ b/graphics/src/cached.rs
@@ -5,7 +5,7 @@ use std::sync::Arc;
 /// A piece of data that can be cached.
 pub trait Cached: Sized {
     /// The type of cache produced.
-    type Cache;
+    type Cache: Clone;
 
     /// Loads the [`Cache`] into a proper instance.
     ///
@@ -15,7 +15,7 @@ pub trait Cached: Sized {
     /// Caches this value, producing its corresponding [`Cache`].
     ///
     /// [`Cache`]: Self::Cache
-    fn cache(self) -> Self::Cache;
+    fn cache(self, previous: Option<Self::Cache>) -> Self::Cache;
 }
 
 impl<T> Cached for Primitive<T> {
@@ -27,7 +27,7 @@ impl<T> Cached for Primitive<T> {
         }
     }
 
-    fn cache(self) -> Arc<Self> {
+    fn cache(self, _previous: Option<Arc<Self>>) -> Arc<Self> {
         Arc::new(self)
     }
 }
@@ -38,5 +38,5 @@ impl Cached for () {
 
     fn load(_cache: &Self::Cache) -> Self {}
 
-    fn cache(self) -> Self::Cache {}
+    fn cache(self, _previous: Option<Self::Cache>) -> Self::Cache {}
 }