Initial implementation of GPUCommandEncoder

Added WebIDL bindings for `GPUCommandEncoder`, `GPUCommandBuffer`, `GPUComputePassEncoder`, `GPUProgrammablePassEncoder`.
Implemented the `beginComputePass`, `copyBufferToBuffer` and `finish` functions of `GPUCommandEncoder`.
Implemented the `createCommandEncoder` function of `GPUDevice`.

components/script/dom/bindings/trace.rs

@@ -153,7 +153,8 @@ use time::{Duration, Timespec, Tm};
 use uuid::Uuid;
 use webgpu::{
     WebGPU, WebGPUAdapter, WebGPUBindGroup, WebGPUBindGroupLayout, WebGPUBuffer,
-    WebGPUComputePipeline, WebGPUDevice, WebGPUPipelineLayout, WebGPUShaderModule,
+    WebGPUCommandBuffer, WebGPUCommandEncoder, WebGPUComputePipeline, WebGPUDevice,
+    WebGPUPipelineLayout, WebGPUShaderModule,
 };
 use webrender_api::{DocumentId, ImageKey};
 use webvr_traits::{WebVRGamepadData, WebVRGamepadHand, WebVRGamepadState};
@@ -531,13 +532,16 @@ unsafe_no_jsmanaged_fields!(RefCell<Option<WebGPU>>);
 unsafe_no_jsmanaged_fields!(RefCell<Identities>);
 unsafe_no_jsmanaged_fields!(WebGPU);
 unsafe_no_jsmanaged_fields!(WebGPUAdapter);
-unsafe_no_jsmanaged_fields!(WebGPUDevice);
 unsafe_no_jsmanaged_fields!(WebGPUBuffer);
 unsafe_no_jsmanaged_fields!(WebGPUBindGroup);
 unsafe_no_jsmanaged_fields!(WebGPUBindGroupLayout);
 unsafe_no_jsmanaged_fields!(WebGPUComputePipeline);
 unsafe_no_jsmanaged_fields!(WebGPUPipelineLayout);
 unsafe_no_jsmanaged_fields!(WebGPUShaderModule);
+unsafe_no_jsmanaged_fields!(WebGPUCommandBuffer);
+unsafe_no_jsmanaged_fields!(WebGPUCommandEncoder);
+unsafe_no_jsmanaged_fields!(WebGPUDevice);
+unsafe_no_jsmanaged_fields!(webgpu::wgpu::command::RawPass);
 unsafe_no_jsmanaged_fields!(GPUBufferState);
 unsafe_no_jsmanaged_fields!(WebXRSwapChainId);
 unsafe_no_jsmanaged_fields!(MediaList);

components/script/dom/globalscope.rs

@@ -99,8 +99,8 @@ use time::{get_time, Timespec};
 use uuid::Uuid;
 use webgpu::wgpu::{
     id::{
-        AdapterId, BindGroupId, BindGroupLayoutId, BufferId, ComputePipelineId, DeviceId,
+        AdapterId, BindGroupId, BindGroupLayoutId, BufferId, CommandEncoderId, ComputePipelineId,
-        PipelineLayoutId, ShaderModuleId,
+        DeviceId, PipelineLayoutId, ShaderModuleId,
     },
     Backend,
 };
@@ -2137,11 +2137,18 @@ impl GlobalScope {
             .borrow_mut()
             .create_shader_module_id(backend)
     }
+
     pub fn wgpu_create_compute_pipeline_id(&self, backend: Backend) -> ComputePipelineId {
         self.gpu_id_hub
             .borrow_mut()
             .create_compute_pipeline_id(backend)
     }
+
+    pub fn wgpu_create_command_encoder_id(&self, backend: Backend) -> CommandEncoderId {
+        self.gpu_id_hub
+            .borrow_mut()
+            .create_command_encoder_id(backend)
+    }
 }
 
 fn timestamp_in_ms(time: Timespec) -> u64 {

components/script/dom/gpucommandbuffer.rs

@@ -0,0 +1,58 @@
+/* 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;
+use crate::dom::bindings::codegen::Bindings::GPUCommandBufferBinding::{
+    self, GPUCommandBufferMethods,
+};
+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 dom_struct::dom_struct;
+use webgpu::{WebGPU, WebGPUCommandBuffer};
+
+#[dom_struct]
+pub struct GPUCommandBuffer {
+    reflector_: Reflector,
+    #[ignore_malloc_size_of = "defined in webgpu"]
+    channel: WebGPU,
+    label: DomRefCell<Option<DOMString>>,
+    command_buffer: WebGPUCommandBuffer,
+}
+
+impl GPUCommandBuffer {
+    pub fn new_inherited(channel: WebGPU, command_buffer: WebGPUCommandBuffer) -> GPUCommandBuffer {
+        GPUCommandBuffer {
+            channel,
+            reflector_: Reflector::new(),
+            label: DomRefCell::new(None),
+            command_buffer,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        channel: WebGPU,
+        command_buffer: WebGPUCommandBuffer,
+    ) -> DomRoot<GPUCommandBuffer> {
+        reflect_dom_object(
+            Box::new(GPUCommandBuffer::new_inherited(channel, command_buffer)),
+            global,
+            GPUCommandBufferBinding::Wrap,
+        )
+    }
+}
+
+impl GPUCommandBufferMethods for GPUCommandBuffer {
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn GetLabel(&self) -> Option<DOMString> {
+        self.label.borrow().clone()
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn SetLabel(&self, value: Option<DOMString>) {
+        *self.label.borrow_mut() = value;
+    }
+}

components/script/dom/gpucommandencoder.rs

@@ -0,0 +1,114 @@
+/* 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;
+use crate::dom::bindings::codegen::Bindings::GPUCommandEncoderBinding::{
+    self, GPUCommandBufferDescriptor, GPUCommandEncoderMethods, GPUComputePassDescriptor,
+};
+use crate::dom::bindings::reflector::DomObject;
+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::dom::gpubuffer::GPUBuffer;
+use crate::dom::gpucommandbuffer::GPUCommandBuffer;
+use crate::dom::gpucomputepassencoder::GPUComputePassEncoder;
+use dom_struct::dom_struct;
+use ipc_channel::ipc;
+use webgpu::{wgpu::command::RawPass, WebGPU, WebGPUCommandEncoder, WebGPURequest};
+
+#[dom_struct]
+pub struct GPUCommandEncoder {
+    reflector_: Reflector,
+    #[ignore_malloc_size_of = "defined in webgpu"]
+    channel: WebGPU,
+    label: DomRefCell<Option<DOMString>>,
+    encoder: WebGPUCommandEncoder,
+}
+
+impl GPUCommandEncoder {
+    pub fn new_inherited(channel: WebGPU, encoder: WebGPUCommandEncoder) -> GPUCommandEncoder {
+        GPUCommandEncoder {
+            channel,
+            reflector_: Reflector::new(),
+            label: DomRefCell::new(None),
+            encoder,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        channel: WebGPU,
+        encoder: WebGPUCommandEncoder,
+    ) -> DomRoot<GPUCommandEncoder> {
+        reflect_dom_object(
+            Box::new(GPUCommandEncoder::new_inherited(channel, encoder)),
+            global,
+            GPUCommandEncoderBinding::Wrap,
+        )
+    }
+}
+
+impl GPUCommandEncoderMethods for GPUCommandEncoder {
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn GetLabel(&self) -> Option<DOMString> {
+        self.label.borrow().clone()
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn SetLabel(&self, value: Option<DOMString>) {
+        *self.label.borrow_mut() = value;
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-begincomputepass
+    fn BeginComputePass(
+        &self,
+        _descriptor: &GPUComputePassDescriptor,
+    ) -> DomRoot<GPUComputePassEncoder> {
+        GPUComputePassEncoder::new(
+            &self.global(),
+            self.channel.clone(),
+            RawPass::new_compute(self.encoder.0),
+        )
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-copybuffertobuffer
+    fn CopyBufferToBuffer(
+        &self,
+        source: &GPUBuffer,
+        source_offset: u64,
+        destination: &GPUBuffer,
+        destination_offset: u64,
+        size: u64,
+    ) {
+        self.channel
+            .0
+            .send(WebGPURequest::CopyBufferToBuffer(
+                self.encoder.0,
+                source.id().0,
+                source_offset,
+                destination.id().0,
+                destination_offset,
+                size,
+            ))
+            .expect("Failed to send CopyBufferToBuffer");
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-finish
+    fn Finish(&self, _descriptor: &GPUCommandBufferDescriptor) -> DomRoot<GPUCommandBuffer> {
+        let (sender, receiver) = ipc::channel().unwrap();
+        self.channel
+            .0
+            .send(WebGPURequest::CommandEncoderFinish(
+                sender,
+                self.encoder.0,
+                // TODO(zakorgy): We should use `_descriptor` here after it's not empty
+                // and the underlying wgpu-core struct is serializable
+            ))
+            .expect("Failed to send CopyBufferToBuffer");
+
+        let buffer = receiver.recv().unwrap();
+        GPUCommandBuffer::new(&self.global(), self.channel.clone(), buffer)
+    }
+}

components/script/dom/gpucomputepassencoder.rs

@@ -0,0 +1,59 @@
+/* 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;
+use crate::dom::bindings::codegen::Bindings::GPUComputePassEncoderBinding::{
+    self, GPUComputePassEncoderMethods,
+};
+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 dom_struct::dom_struct;
+use webgpu::{wgpu::command::RawPass, WebGPU};
+
+#[dom_struct]
+pub struct GPUComputePassEncoder {
+    reflector_: Reflector,
+    #[ignore_malloc_size_of = "defined in webgpu"]
+    channel: WebGPU,
+    label: DomRefCell<Option<DOMString>>,
+    #[ignore_malloc_size_of = "defined in wgpu-core"]
+    pass: RawPass,
+}
+
+impl GPUComputePassEncoder {
+    pub fn new_inherited(channel: WebGPU, pass: RawPass) -> GPUComputePassEncoder {
+        GPUComputePassEncoder {
+            channel,
+            reflector_: Reflector::new(),
+            label: DomRefCell::new(None),
+            pass,
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        channel: WebGPU,
+        pass: RawPass,
+    ) -> DomRoot<GPUComputePassEncoder> {
+        reflect_dom_object(
+            Box::new(GPUComputePassEncoder::new_inherited(channel, pass)),
+            global,
+            GPUComputePassEncoderBinding::Wrap,
+        )
+    }
+}
+
+impl GPUComputePassEncoderMethods for GPUComputePassEncoder {
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn GetLabel(&self) -> Option<DOMString> {
+        self.label.borrow().clone()
+    }
+
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
+    fn SetLabel(&self, value: Option<DOMString>) {
+        *self.label.borrow_mut() = value;
+    }
+}

components/script/dom/gpudevice.rs

@@ -12,7 +12,9 @@ use crate::dom::bindings::codegen::Bindings::GPUBindGroupLayoutBinding::{
 };
 use crate::dom::bindings::codegen::Bindings::GPUBufferBinding::GPUBufferDescriptor;
 use crate::dom::bindings::codegen::Bindings::GPUComputePipelineBinding::GPUComputePipelineDescriptor;
-use crate::dom::bindings::codegen::Bindings::GPUDeviceBinding::{self, GPUDeviceMethods};
+use crate::dom::bindings::codegen::Bindings::GPUDeviceBinding::{
+    self, GPUCommandEncoderDescriptor, GPUDeviceMethods,
+};
 use crate::dom::bindings::codegen::Bindings::GPUPipelineLayoutBinding::GPUPipelineLayoutDescriptor;
 use crate::dom::bindings::codegen::Bindings::GPUShaderModuleBinding::GPUShaderModuleDescriptor;
 use crate::dom::bindings::codegen::UnionTypes::Uint32ArrayOrString::{String, Uint32Array};
@@ -26,6 +28,7 @@ use crate::dom::gpuadapter::GPUAdapter;
 use crate::dom::gpubindgroup::GPUBindGroup;
 use crate::dom::gpubindgrouplayout::GPUBindGroupLayout;
 use crate::dom::gpubuffer::{GPUBuffer, GPUBufferState};
+use crate::dom::gpucommandencoder::GPUCommandEncoder;
 use crate::dom::gpucomputepipeline::GPUComputePipeline;
 use crate::dom::gpupipelinelayout::GPUPipelineLayout;
 use crate::dom::gpushadermodule::GPUShaderModule;
@@ -589,4 +592,21 @@ impl GPUDeviceMethods for GPUDevice {
         let compute_pipeline = receiver.recv().unwrap();
         GPUComputePipeline::new(&self.global(), compute_pipeline)
     }
+    /// https://gpuweb.github.io/gpuweb/#dom-gpudevice-createcommandencoder
+    fn CreateCommandEncoder(
+        &self,
+        _descriptor: &GPUCommandEncoderDescriptor,
+    ) -> DomRoot<GPUCommandEncoder> {
+        let (sender, receiver) = ipc::channel().unwrap();
+        let id = self
+            .global()
+            .wgpu_create_command_encoder_id(self.device.0.backend());
+        self.channel
+            .0
+            .send(WebGPURequest::CreateCommandEncoder(sender, self.device, id))
+            .expect("Failed to create WebGPU command encoder");
+        let encoder = receiver.recv().unwrap();
+
+        GPUCommandEncoder::new(&self.global(), self.channel.clone(), encoder)
+    }
 }

components/script/dom/identityhub.rs

@@ -6,8 +6,8 @@ use smallvec::SmallVec;
 use webgpu::wgpu::{
     hub::IdentityManager,
     id::{
-        AdapterId, BindGroupId, BindGroupLayoutId, BufferId, ComputePipelineId, DeviceId,
+        AdapterId, BindGroupId, BindGroupLayoutId, BufferId, CommandEncoderId, ComputePipelineId,
-        PipelineLayoutId, ShaderModuleId,
+        DeviceId, PipelineLayoutId, ShaderModuleId,
     },
     Backend,
 };
@@ -22,6 +22,7 @@ pub struct IdentityHub {
     compute_pipelines: IdentityManager,
     pipeline_layouts: IdentityManager,
     shader_modules: IdentityManager,
+    command_encoders: IdentityManager,
     backend: Backend,
 }
 
@@ -36,6 +37,7 @@ impl IdentityHub {
             compute_pipelines: IdentityManager::default(),
             pipeline_layouts: IdentityManager::default(),
             shader_modules: IdentityManager::default(),
+            command_encoders: IdentityManager::default(),
             backend,
         }
     }
@@ -71,6 +73,10 @@ impl IdentityHub {
     fn create_shader_module_id(&mut self) -> ShaderModuleId {
         self.shader_modules.alloc(self.backend)
     }
+
+    pub fn create_command_encoder_id(&mut self) -> CommandEncoderId {
+        self.command_encoders.alloc(self.backend)
+    }
 }
 
 #[derive(Debug)]
@@ -166,4 +172,8 @@ impl Identities {
     pub fn create_shader_module_id(&mut self, backend: Backend) -> ShaderModuleId {
         self.select(backend).create_shader_module_id()
     }
+
+    pub fn create_command_encoder_id(&mut self, backend: Backend) -> CommandEncoderId {
+        self.select(backend).create_command_encoder_id()
+    }
 }

components/script/dom/mod.rs

@@ -322,6 +322,9 @@ pub mod gpubindgroup;
 pub mod gpubindgrouplayout;
 pub mod gpubuffer;
 pub mod gpubufferusage;
+pub mod gpucommandbuffer;
+pub mod gpucommandencoder;
+pub mod gpucomputepassencoder;
 pub mod gpucomputepipeline;
 pub mod gpudevice;
 pub mod gpupipelinelayout;

components/script/dom/webidls/GPUCommandBuffer.webidl

@@ -0,0 +1,9 @@
+/* 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/. */
+
+// https://gpuweb.github.io/gpuweb/#gpucommandbuffer
+[Exposed=(Window, DedicatedWorker), Serializable, Pref="dom.webgpu.enabled"]
+interface GPUCommandBuffer {
+};
+GPUCommandBuffer includes GPUObjectBase;

components/script/dom/webidls/GPUCommandEncoder.webidl

@@ -0,0 +1,45 @@
+/* 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/. */
+
+// https://gpuweb.github.io/gpuweb/#gpucommandencoder
+[Exposed=(Window, DedicatedWorker), Serializable, Pref="dom.webgpu.enabled"]
+interface GPUCommandEncoder {
+    // GPURenderPassEncoder beginRenderPass(GPURenderPassDescriptor descriptor);
+    GPUComputePassEncoder beginComputePass(optional GPUComputePassDescriptor descriptor = {});
+
+    void copyBufferToBuffer(
+        GPUBuffer source,
+        GPUBufferSize sourceOffset,
+        GPUBuffer destination,
+        GPUBufferSize destinationOffset,
+        GPUBufferSize size);
+
+    // void copyBufferToTexture(
+    //     GPUBufferCopyView source,
+    //     GPUTextureCopyView destination,
+    //     GPUExtent3D copySize);
+
+    // void copyTextureToBuffer(
+    //     GPUTextureCopyView source,
+    //     GPUBufferCopyView destination,
+    //     GPUExtent3D copySize);
+
+    // void copyTextureToTexture(
+    //     GPUTextureCopyView source,
+    //     GPUTextureCopyView destination,
+    //     GPUExtent3D copySize);
+
+    // void pushDebugGroup(DOMString groupLabel);
+    // void popDebugGroup();
+    // void insertDebugMarker(DOMString markerLabel);
+
+    GPUCommandBuffer finish(optional GPUCommandBufferDescriptor descriptor = {});
+};
+GPUCommandEncoder includes GPUObjectBase;
+
+dictionary GPUComputePassDescriptor : GPUObjectDescriptorBase {
+};
+
+dictionary GPUCommandBufferDescriptor : GPUObjectDescriptorBase {
+};

components/script/dom/webidls/GPUComputePassEncoder.webidl

@@ -0,0 +1,15 @@
+/* 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/. */
+
+// https://gpuweb.github.io/gpuweb/#gpucomputepassencoder
+[Exposed=(Window, DedicatedWorker), Serializable, Pref="dom.webgpu.enabled"]
+interface GPUComputePassEncoder {
+    // void setPipeline(GPUComputePipeline pipeline);
+    // void dispatch(unsigned long x, optional unsigned long y = 1, optional unsigned long z = 1);
+    // void dispatchIndirect(GPUBuffer indirectBuffer, GPUBufferSize indirectOffset);
+
+    // void endPass();
+};
+GPUComputePassEncoder includes GPUObjectBase;
+GPUComputePassEncoder includes GPUProgrammablePassEncoder;

components/script/dom/webidls/GPUDevice.webidl

@@ -11,9 +11,9 @@ interface GPUDevice : EventTarget {
 
     GPUBuffer createBuffer(GPUBufferDescriptor descriptor);
     GPUMappedBuffer createBufferMapped(GPUBufferDescriptor descriptor);
-    //Promise<GPUMappedBuffer> createBufferMappedAsync(GPUBufferDescriptor descriptor);
+    // Promise<GPUMappedBuffer> createBufferMappedAsync(GPUBufferDescriptor descriptor);
-    //GPUTexture createTexture(GPUTextureDescriptor descriptor);
+    // GPUTexture createTexture(GPUTextureDescriptor descriptor);
-    //GPUSampler createSampler(optional GPUSamplerDescriptor descriptor = {});
+    // GPUSampler createSampler(optional GPUSamplerDescriptor descriptor = {});
 
     GPUBindGroupLayout createBindGroupLayout(GPUBindGroupLayoutDescriptor descriptor);
     GPUPipelineLayout createPipelineLayout(GPUPipelineLayoutDescriptor descriptor);
@@ -21,11 +21,14 @@ interface GPUDevice : EventTarget {
 
     GPUShaderModule createShaderModule(GPUShaderModuleDescriptor descriptor);
     GPUComputePipeline createComputePipeline(GPUComputePipelineDescriptor descriptor);
-    /*GPURenderPipeline createRenderPipeline(GPURenderPipelineDescriptor descriptor);
+    // GPURenderPipeline createRenderPipeline(GPURenderPipelineDescriptor descriptor);
 
     GPUCommandEncoder createCommandEncoder(optional GPUCommandEncoderDescriptor descriptor = {});
-    GPURenderBundleEncoder createRenderBundleEncoder(GPURenderBundleEncoderDescriptor descriptor);
+    // GPURenderBundleEncoder createRenderBundleEncoder(GPURenderBundleEncoderDescriptor descriptor);
 
-    GPUQueue getQueue();*/
+    // GPUQueue getQueue();
 };
 GPUDevice includes GPUObjectBase;
+
+dictionary GPUCommandEncoderDescriptor : GPUObjectDescriptorBase {
+};

components/script/dom/webidls/GPUProgrammablePassEncoder.webidl

@@ -0,0 +1,19 @@
+/* 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/. */
+
+// https://gpuweb.github.io/gpuweb/#gpuprogrammablepassencoder
+[Exposed=(Window, DedicatedWorker)]
+interface mixin GPUProgrammablePassEncoder {
+    // void setBindGroup(unsigned long index, GPUBindGroup bindGroup,
+    //                   optional sequence<unsigned long> dynamicOffsets = []);
+
+    // void setBindGroup(unsigned long index, GPUBindGroup bindGroup,
+    //                   Uint32Array dynamicOffsetsData,
+    //                   unsigned long long dynamicOffsetsDataStart,
+    //                   unsigned long long dynamicOffsetsDataLength);
+
+    // void pushDebugGroup(DOMString groupLabel);
+    // void popDebugGroup();
+    // void insertDebugMarker(DOMString markerLabel);
+};

components/webgpu/lib.rs

@@ -81,6 +81,27 @@ pub enum WebGPURequest {
     ),
     UnmapBuffer(WebGPUBuffer),
     DestroyBuffer(WebGPUBuffer),
+    CreateCommandEncoder(
+        IpcSender<WebGPUCommandEncoder>,
+        WebGPUDevice,
+        // TODO(zakorgy): Serialize CommandEncoderDescriptor in wgpu-core
+        // wgpu::command::CommandEncoderDescriptor,
+        wgpu::id::CommandEncoderId,
+    ),
+    CopyBufferToBuffer(
+        wgpu::id::CommandEncoderId,
+        wgpu::id::BufferId,
+        wgpu::BufferAddress,
+        wgpu::id::BufferId,
+        wgpu::BufferAddress,
+        wgpu::BufferAddress,
+    ),
+    CommandEncoderFinish(
+        IpcSender<WebGPUCommandBuffer>,
+        wgpu::id::CommandEncoderId,
+        // TODO(zakorgy): Serialize CommandBufferDescriptor in wgpu-core
+        // wgpu::command::CommandBufferDescriptor,
+    ),
 }
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
@@ -345,6 +366,47 @@ impl WGPU {
                         )
                     }
                 },
+                WebGPURequest::CreateCommandEncoder(sender, device, id) => {
+                    let global = &self.global;
+                    let id = gfx_select!(id => global.device_create_command_encoder(device.0, &Default::default(), id));
+                    if let Err(e) = sender.send(WebGPUCommandEncoder(id)) {
+                        warn!(
+                            "Failed to send response to WebGPURequest::CreateCommandEncoder ({})",
+                            e
+                        )
+                    }
+                },
+                WebGPURequest::CopyBufferToBuffer(
+                    command_encoder_id,
+                    source,
+                    source_offset,
+                    destination,
+                    destination_offset,
+                    size,
+                ) => {
+                    let global = &self.global;
+                    let _ = gfx_select!(command_encoder_id => global.command_encoder_copy_buffer_to_buffer(
+                        command_encoder_id,
+                        source,
+                        source_offset,
+                        destination,
+                        destination_offset,
+                        size
+                    ));
+                },
+                WebGPURequest::CommandEncoderFinish(sender, command_encoder_id) => {
+                    let global = &self.global;
+                    let command_buffer_id = gfx_select!(command_encoder_id => global.command_encoder_finish(
+                        command_encoder_id,
+                        &wgpu::command::CommandBufferDescriptor::default()
+                    ));
+                    if let Err(e) = sender.send(WebGPUCommandBuffer(command_buffer_id)) {
+                        warn!(
+                            "Failed to send response to WebGPURequest::CommandEncoderFinish ({})",
+                            e
+                        )
+                    }
+                },
                 WebGPURequest::Exit(sender) => {
                     self.deinit();
                     if let Err(e) = sender.send(()) {
@@ -380,3 +442,5 @@ webgpu_resource!(WebGPUBindGroupLayout, wgpu::id::BindGroupLayoutId);
 webgpu_resource!(WebGPUComputePipeline, wgpu::id::ComputePipelineId);
 webgpu_resource!(WebGPUPipelineLayout, wgpu::id::PipelineLayoutId);
 webgpu_resource!(WebGPUShaderModule, wgpu::id::ShaderModuleId);
+webgpu_resource!(WebGPUCommandEncoder, wgpu::id::CommandEncoderId);
+webgpu_resource!(WebGPUCommandBuffer, wgpu::id::CommandBufferId);