1 files changed, 104 insertions, 0 deletions
diff --git a/components/script/dom/gpucommandbuffer.rs b/components/script/dom/gpucommandbuffer.rs
new file mode 100644
index 00000000000..eb6ede84c26
--- /dev/null
+++ b/components/script/dom/gpucommandbuffer.rs
@@ -0,0 +1,104 @@
+/* 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::cell::{DomRefCell, Ref};
+use crate::dom::bindings::codegen::Bindings::GPUCommandBufferBinding::GPUCommandBufferMethods;
+use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
+use crate::dom::bindings::root::Dom;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::str::USVString;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::gpubuffer::GPUBuffer;
+use dom_struct::dom_struct;
+use std::collections::HashSet;
+use std::hash::{Hash, Hasher};
+use webgpu::{WebGPU, WebGPUCommandBuffer, WebGPURequest};
+
+impl Eq for DomRoot<GPUBuffer> {}
+impl Hash for DomRoot<GPUBuffer> {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.id().hash(state);
+    }
+}
+
+#[dom_struct]
+pub struct GPUCommandBuffer {
+    reflector_: Reflector,
+    #[ignore_malloc_size_of = "defined in webgpu"]
+    channel: WebGPU,
+    label: DomRefCell<Option<USVString>>,
+    command_buffer: WebGPUCommandBuffer,
+    buffers: DomRefCell<HashSet<Dom<GPUBuffer>>>,
+}
+
+impl GPUCommandBuffer {
+    fn new_inherited(
+        channel: WebGPU,
+        command_buffer: WebGPUCommandBuffer,
+        buffers: HashSet<DomRoot<GPUBuffer>>,
+        label: Option<USVString>,
+    ) -> Self {
+        Self {
+            channel,
+            reflector_: Reflector::new(),
+            label: DomRefCell::new(label),
+            command_buffer,
+            buffers: DomRefCell::new(buffers.into_iter().map(|b| Dom::from_ref(&*b)).collect()),
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        channel: WebGPU,
+        command_buffer: WebGPUCommandBuffer,
+        buffers: HashSet<DomRoot<GPUBuffer>>,
+        label: Option<USVString>,
+    ) -> DomRoot<Self> {
+        reflect_dom_object(
+            Box::new(GPUCommandBuffer::new_inherited(
+                channel,
+                command_buffer,
+                buffers,
+                label,
+            )),
+            global,
+        )
+    }
+}
+
+impl Drop for GPUCommandBuffer {
+    fn drop(&mut self) {
+        if let Err(e) = self.channel.0.send((
+            None,
+            WebGPURequest::FreeCommandBuffer(self.command_buffer.0),
+        )) {
+            warn!(
+                "Failed to send FreeCommandBuffer({:?}) ({})",
+                self.command_buffer.0, e
+            );
+        }
+    }
+}
+
+impl GPUCommandBuffer {
+    pub fn id(&self) -> WebGPUCommandBuffer {
+        self.command_buffer
+    }
+
+    pub fn buffers(&self) -> Ref<HashSet<Dom<GPUBuffer>>> {
+        self.buffers.borrow()
+    }
+}
+
+impl GPUCommandBufferMethods for GPUCommandBuffer {
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn GetLabel(&self) -> Option<USVString> {
+        self.label.borrow().clone()
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn SetLabel(&self, value: Option<USVString>) {
+        *self.label.borrow_mut() = value;
+    }
+}