Initial implementation of WebGPU API

components/script/dom/gpuadapter.rs

@@ -0,0 +1,63 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use crate::dom::bindings::codegen::Bindings::GPUAdapterBinding::{self, GPUAdapterMethods};
+use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::DOMString;
+use crate::dom::globalscope::GlobalScope;
+use crate::script_runtime::JSContext as SafeJSContext;
+use dom_struct::dom_struct;
+use js::jsapi::{Heap, JSObject};
+use std::ptr::NonNull;
+use webgpu::WebGPUAdapter;
+
+#[dom_struct]
+pub struct GPUAdapter {
+    reflector_: Reflector,
+    name: DOMString,
+    #[ignore_malloc_size_of = "mozjs"]
+    extensions: Heap<*mut JSObject>,
+    adapter: WebGPUAdapter,
+}
+
+impl GPUAdapter {
+    pub fn new_inherited(
+        name: DOMString,
+        extensions: Heap<*mut JSObject>,
+        adapter: WebGPUAdapter,
+    ) -> GPUAdapter {
+        GPUAdapter {
+            reflector_: Reflector::new(),
+            name,
+            extensions,
+            adapter,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        name: DOMString,
+        extensions: Heap<*mut JSObject>,
+        adapter: WebGPUAdapter,
+    ) -> DomRoot<GPUAdapter> {
+        reflect_dom_object(
+            Box::new(GPUAdapter::new_inherited(name, extensions, adapter)),
+            global,
+            GPUAdapterBinding::Wrap,
+        )
+    }
+}
+
+impl GPUAdapterMethods for GPUAdapter {
+    // https://gpuweb.github.io/gpuweb/#dom-gpuadapter-name
+    fn Name(&self) -> DOMString {
+        self.name.clone()
+    }
+
+    // https://gpuweb.github.io/gpuweb/#dom-gpuadapter-extensions
+    fn Extensions(&self, _cx: SafeJSContext) -> NonNull<JSObject> {
+        NonNull::new(self.extensions.get()).unwrap()
+    }
+}