Add expose-ids feature (#3104)

wgpu/Cargo.toml

@@ -86,6 +86,7 @@ angle = ["wgc/angle"]
 webgl = ["wgc"]
 emscripten = ["webgl"]
 vulkan-portability = ["wgc/vulkan-portability"]
+expose-ids = []
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies.wgc]
 workspace = true

wgpu/src/backend/direct.rs

@@ -815,6 +815,49 @@ pub(crate) struct CommandEncoder {
     open: bool,
 }
 
+pub(crate) type Id = (u32, u32, wgt::Backend);
+
+impl<T: wgc::id::TypedId> crate::GlobalId for T {
+    fn global_id(&self) -> Id {
+        self.unzip()
+    }
+}
+
+impl crate::GlobalId for Surface {
+    fn global_id(&self) -> Id {
+        use wgc::id::TypedId;
+        self.id.unzip()
+    }
+}
+
+impl crate::GlobalId for Device {
+    fn global_id(&self) -> Id {
+        use wgc::id::TypedId;
+        self.id.unzip()
+    }
+}
+
+impl crate::GlobalId for Buffer {
+    fn global_id(&self) -> Id {
+        use wgc::id::TypedId;
+        self.id.unzip()
+    }
+}
+
+impl crate::GlobalId for Texture {
+    fn global_id(&self) -> Id {
+        use wgc::id::TypedId;
+        self.id.unzip()
+    }
+}
+
+impl crate::GlobalId for CommandEncoder {
+    fn global_id(&self) -> Id {
+        use wgc::id::TypedId;
+        self.id.unzip()
+    }
+}
+
 impl crate::Context for Context {
     type AdapterId = wgc::id::AdapterId;
     type DeviceId = Device;

wgpu/src/backend/mod.rs

@@ -1,9 +1,9 @@
 #[cfg(all(target_arch = "wasm32", not(feature = "webgl")))]
 mod web;
 #[cfg(all(target_arch = "wasm32", not(feature = "webgl")))]
-pub(crate) use web::{BufferMappedRange, Context, QueueWriteBuffer};
+pub(crate) use web::{BufferMappedRange, Context, Id, QueueWriteBuffer};
 
 #[cfg(any(not(target_arch = "wasm32"), feature = "webgl"))]
 mod direct;
 #[cfg(any(not(target_arch = "wasm32"), feature = "webgl"))]
-pub(crate) use direct::{BufferMappedRange, Context, QueueWriteBuffer};
+pub(crate) use direct::{BufferMappedRange, Context, Id, QueueWriteBuffer};