1 files changed, 692 insertions, 0 deletions
diff --git a/ext/webgpu/command_encoder.rs b/ext/webgpu/command_encoder.rs
new file mode 100644
index 000000000..6821a2954
--- /dev/null
+++ b/ext/webgpu/command_encoder.rs
@@ -0,0 +1,692 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+use deno_core::error::bad_resource_id;
+use deno_core::error::AnyError;
+use deno_core::ResourceId;
+use deno_core::{OpState, Resource};
+use serde::Deserialize;
+use std::borrow::Cow;
+use std::cell::RefCell;
+use std::num::NonZeroU32;
+
+use super::error::WebGpuResult;
+
+pub(crate) struct WebGpuCommandEncoder(
+  pub(crate) wgpu_core::id::CommandEncoderId,
+);
+impl Resource for WebGpuCommandEncoder {
+  fn name(&self) -> Cow<str> {
+    "webGPUCommandEncoder".into()
+  }
+}
+
+pub(crate) struct WebGpuCommandBuffer(
+  pub(crate) wgpu_core::id::CommandBufferId,
+);
+impl Resource for WebGpuCommandBuffer {
+  fn name(&self) -> Cow<str> {
+    "webGPUCommandBuffer".into()
+  }
+}
+
+fn serialize_store_op(store_op: String) -> wgpu_core::command::StoreOp {
+  match store_op.as_str() {
+    "store" => wgpu_core::command::StoreOp::Store,
+    "discard" => wgpu_core::command::StoreOp::Clear,
+    _ => unreachable!(),
+  }
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CreateCommandEncoderArgs {
+  device_rid: ResourceId,
+  label: Option<String>,
+  _measure_execution_time: Option<bool>, // not yet implemented
+}
+
+pub fn op_webgpu_create_command_encoder(
+  state: &mut OpState,
+  args: CreateCommandEncoderArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let device_resource = state
+    .resource_table
+    .get::<super::WebGpuDevice>(args.device_rid)
+    .ok_or_else(bad_resource_id)?;
+  let device = device_resource.0;
+
+  let descriptor = wgpu_types::CommandEncoderDescriptor {
+    label: args.label.map(Cow::from),
+  };
+
+  gfx_put!(device => instance.device_create_command_encoder(
+    device,
+    &descriptor,
+    std::marker::PhantomData
+  ) => state, WebGpuCommandEncoder)
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct GpuRenderPassColorAttachment {
+  view: u32,
+  resolve_target: Option<u32>,
+  load_op: String,
+  load_value: Option<super::render_pass::GpuColor>,
+  store_op: Option<String>,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuRenderPassDepthStencilAttachment {
+  view: u32,
+  depth_load_op: String,
+  depth_load_value: Option<f32>,
+  depth_store_op: String,
+  depth_read_only: Option<bool>,
+  stencil_load_op: String,
+  stencil_load_value: Option<u32>,
+  stencil_store_op: String,
+  stencil_read_only: Option<bool>,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderBeginRenderPassArgs {
+  command_encoder_rid: ResourceId,
+  label: Option<String>,
+  color_attachments: Vec<GpuRenderPassColorAttachment>,
+  depth_stencil_attachment: Option<GpuRenderPassDepthStencilAttachment>,
+  _occlusion_query_set: Option<u32>, // not yet implemented
+}
+
+pub fn op_webgpu_command_encoder_begin_render_pass(
+  state: &mut OpState,
+  args: CommandEncoderBeginRenderPassArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+
+  let mut color_attachments = vec![];
+
+  for color_attachment in args.color_attachments {
+    let texture_view_resource = state
+      .resource_table
+      .get::<super::texture::WebGpuTextureView>(color_attachment.view)
+      .ok_or_else(bad_resource_id)?;
+
+    let attachment = wgpu_core::command::RenderPassColorAttachment {
+      view: texture_view_resource.0,
+      resolve_target: color_attachment
+        .resolve_target
+        .map(|rid| {
+          state
+            .resource_table
+            .get::<super::texture::WebGpuTextureView>(rid)
+            .ok_or_else(bad_resource_id)
+        })
+        .transpose()?
+        .map(|texture| texture.0),
+      channel: match color_attachment.load_op.as_str() {
+        "load" => wgpu_core::command::PassChannel {
+          load_op: wgpu_core::command::LoadOp::Load,
+          store_op: color_attachment
+            .store_op
+            .map_or(wgpu_core::command::StoreOp::Store, serialize_store_op),
+          clear_value: Default::default(),
+          read_only: false,
+        },
+        "clear" => {
+          let color = color_attachment.load_value.unwrap();
+          wgpu_core::command::PassChannel {
+            load_op: wgpu_core::command::LoadOp::Clear,
+            store_op: color_attachment
+              .store_op
+              .map_or(wgpu_core::command::StoreOp::Store, serialize_store_op),
+            clear_value: wgpu_types::Color {
+              r: color.r,
+              g: color.g,
+              b: color.b,
+              a: color.a,
+            },
+            read_only: false,
+          }
+        }
+        _ => unreachable!(),
+      },
+    };
+
+    color_attachments.push(attachment)
+  }
+
+  let mut depth_stencil_attachment = None;
+
+  if let Some(attachment) = args.depth_stencil_attachment {
+    let texture_view_resource = state
+      .resource_table
+      .get::<super::texture::WebGpuTextureView>(attachment.view)
+      .ok_or_else(bad_resource_id)?;
+
+    depth_stencil_attachment =
+      Some(wgpu_core::command::RenderPassDepthStencilAttachment {
+        view: texture_view_resource.0,
+        depth: match attachment.depth_load_op.as_str() {
+          "load" => wgpu_core::command::PassChannel {
+            load_op: wgpu_core::command::LoadOp::Load,
+            store_op: serialize_store_op(attachment.depth_store_op),
+            clear_value: 0.0,
+            read_only: attachment.depth_read_only.unwrap_or(false),
+          },
+          "clear" => wgpu_core::command::PassChannel {
+            load_op: wgpu_core::command::LoadOp::Clear,
+            store_op: serialize_store_op(attachment.depth_store_op),
+            clear_value: attachment.depth_load_value.unwrap(),
+            read_only: attachment.depth_read_only.unwrap_or(false),
+          },
+          _ => unreachable!(),
+        },
+        stencil: match attachment.stencil_load_op.as_str() {
+          "load" => wgpu_core::command::PassChannel {
+            load_op: wgpu_core::command::LoadOp::Load,
+            store_op: serialize_store_op(attachment.stencil_store_op),
+            clear_value: 0,
+            read_only: attachment.stencil_read_only.unwrap_or(false),
+          },
+          "clear" => wgpu_core::command::PassChannel {
+            load_op: wgpu_core::command::LoadOp::Clear,
+            store_op: serialize_store_op(attachment.stencil_store_op),
+            clear_value: attachment.stencil_load_value.unwrap(),
+            read_only: attachment.stencil_read_only.unwrap_or(false),
+          },
+          _ => unreachable!(),
+        },
+      });
+  }
+
+  let descriptor = wgpu_core::command::RenderPassDescriptor {
+    label: args.label.map(Cow::from),
+    color_attachments: Cow::from(color_attachments),
+    depth_stencil_attachment: depth_stencil_attachment.as_ref(),
+  };
+
+  let render_pass = wgpu_core::command::RenderPass::new(
+    command_encoder_resource.0,
+    &descriptor,
+  );
+
+  let rid = state
+    .resource_table
+    .add(super::render_pass::WebGpuRenderPass(RefCell::new(
+      render_pass,
+    )));
+
+  Ok(WebGpuResult::rid(rid))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderBeginComputePassArgs {
+  command_encoder_rid: ResourceId,
+  label: Option<String>,
+}
+
+pub fn op_webgpu_command_encoder_begin_compute_pass(
+  state: &mut OpState,
+  args: CommandEncoderBeginComputePassArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+
+  let descriptor = wgpu_core::command::ComputePassDescriptor {
+    label: args.label.map(Cow::from),
+  };
+
+  let compute_pass = wgpu_core::command::ComputePass::new(
+    command_encoder_resource.0,
+    &descriptor,
+  );
+
+  let rid = state
+    .resource_table
+    .add(super::compute_pass::WebGpuComputePass(RefCell::new(
+      compute_pass,
+    )));
+
+  Ok(WebGpuResult::rid(rid))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderCopyBufferToBufferArgs {
+  command_encoder_rid: ResourceId,
+  source: u32,
+  source_offset: u64,
+  destination: u32,
+  destination_offset: u64,
+  size: u64,
+}
+
+pub fn op_webgpu_command_encoder_copy_buffer_to_buffer(
+  state: &mut OpState,
+  args: CommandEncoderCopyBufferToBufferArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+  let source_buffer_resource = state
+    .resource_table
+    .get::<super::buffer::WebGpuBuffer>(args.source)
+    .ok_or_else(bad_resource_id)?;
+  let source_buffer = source_buffer_resource.0;
+  let destination_buffer_resource = state
+    .resource_table
+    .get::<super::buffer::WebGpuBuffer>(args.destination)
+    .ok_or_else(bad_resource_id)?;
+  let destination_buffer = destination_buffer_resource.0;
+
+  gfx_ok!(command_encoder => instance.command_encoder_copy_buffer_to_buffer(
+    command_encoder,
+    source_buffer,
+    args.source_offset,
+    destination_buffer,
+    args.destination_offset,
+    args.size
+  ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct GpuImageCopyBuffer {
+  buffer: u32,
+  offset: Option<u64>,
+  bytes_per_row: Option<u32>,
+  rows_per_image: Option<u32>,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct GpuOrigin3D {
+  pub x: Option<u32>,
+  pub y: Option<u32>,
+  pub z: Option<u32>,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct GpuImageCopyTexture {
+  pub texture: u32,
+  pub mip_level: Option<u32>,
+  pub origin: Option<GpuOrigin3D>,
+  pub _aspect: Option<String>, // not yet implemented
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderCopyBufferToTextureArgs {
+  command_encoder_rid: ResourceId,
+  source: GpuImageCopyBuffer,
+  destination: GpuImageCopyTexture,
+  copy_size: super::texture::GpuExtent3D,
+}
+
+pub fn op_webgpu_command_encoder_copy_buffer_to_texture(
+  state: &mut OpState,
+  args: CommandEncoderCopyBufferToTextureArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+  let source_buffer_resource = state
+    .resource_table
+    .get::<super::buffer::WebGpuBuffer>(args.source.buffer)
+    .ok_or_else(bad_resource_id)?;
+  let destination_texture_resource = state
+    .resource_table
+    .get::<super::texture::WebGpuTexture>(args.destination.texture)
+    .ok_or_else(bad_resource_id)?;
+
+  let source = wgpu_core::command::ImageCopyBuffer {
+    buffer: source_buffer_resource.0,
+    layout: wgpu_types::ImageDataLayout {
+      offset: args.source.offset.unwrap_or(0),
+      bytes_per_row: NonZeroU32::new(args.source.bytes_per_row.unwrap_or(0)),
+      rows_per_image: NonZeroU32::new(args.source.rows_per_image.unwrap_or(0)),
+    },
+  };
+  let destination = wgpu_core::command::ImageCopyTexture {
+    texture: destination_texture_resource.0,
+    mip_level: args.destination.mip_level.unwrap_or(0),
+    origin: args
+      .destination
+      .origin
+      .map_or(Default::default(), |origin| wgpu_types::Origin3d {
+        x: origin.x.unwrap_or(0),
+        y: origin.y.unwrap_or(0),
+        z: origin.z.unwrap_or(0),
+      }),
+  };
+  gfx_ok!(command_encoder => instance.command_encoder_copy_buffer_to_texture(
+    command_encoder,
+    &source,
+    &destination,
+    &wgpu_types::Extent3d {
+      width: args.copy_size.width.unwrap_or(1),
+      height: args.copy_size.height.unwrap_or(1),
+      depth_or_array_layers: args.copy_size.depth_or_array_layers.unwrap_or(1),
+    }
+  ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderCopyTextureToBufferArgs {
+  command_encoder_rid: ResourceId,
+  source: GpuImageCopyTexture,
+  destination: GpuImageCopyBuffer,
+  copy_size: super::texture::GpuExtent3D,
+}
+
+pub fn op_webgpu_command_encoder_copy_texture_to_buffer(
+  state: &mut OpState,
+  args: CommandEncoderCopyTextureToBufferArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+  let source_texture_resource = state
+    .resource_table
+    .get::<super::texture::WebGpuTexture>(args.source.texture)
+    .ok_or_else(bad_resource_id)?;
+  let destination_buffer_resource = state
+    .resource_table
+    .get::<super::buffer::WebGpuBuffer>(args.destination.buffer)
+    .ok_or_else(bad_resource_id)?;
+
+  let source = wgpu_core::command::ImageCopyTexture {
+    texture: source_texture_resource.0,
+    mip_level: args.source.mip_level.unwrap_or(0),
+    origin: args.source.origin.map_or(Default::default(), |origin| {
+      wgpu_types::Origin3d {
+        x: origin.x.unwrap_or(0),
+        y: origin.y.unwrap_or(0),
+        z: origin.z.unwrap_or(0),
+      }
+    }),
+  };
+  let destination = wgpu_core::command::ImageCopyBuffer {
+    buffer: destination_buffer_resource.0,
+    layout: wgpu_types::ImageDataLayout {
+      offset: args.destination.offset.unwrap_or(0),
+      bytes_per_row: NonZeroU32::new(
+        args.destination.bytes_per_row.unwrap_or(0),
+      ),
+      rows_per_image: NonZeroU32::new(
+        args.destination.rows_per_image.unwrap_or(0),
+      ),
+    },
+  };
+  gfx_ok!(command_encoder => instance.command_encoder_copy_texture_to_buffer(
+    command_encoder,
+    &source,
+    &destination,
+    &wgpu_types::Extent3d {
+      width: args.copy_size.width.unwrap_or(1),
+      height: args.copy_size.height.unwrap_or(1),
+      depth_or_array_layers: args.copy_size.depth_or_array_layers.unwrap_or(1),
+    }
+  ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderCopyTextureToTextureArgs {
+  command_encoder_rid: ResourceId,
+  source: GpuImageCopyTexture,
+  destination: GpuImageCopyTexture,
+  copy_size: super::texture::GpuExtent3D,
+}
+
+pub fn op_webgpu_command_encoder_copy_texture_to_texture(
+  state: &mut OpState,
+  args: CommandEncoderCopyTextureToTextureArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+  let source_texture_resource = state
+    .resource_table
+    .get::<super::texture::WebGpuTexture>(args.source.texture)
+    .ok_or_else(bad_resource_id)?;
+  let destination_texture_resource = state
+    .resource_table
+    .get::<super::texture::WebGpuTexture>(args.destination.texture)
+    .ok_or_else(bad_resource_id)?;
+
+  let source = wgpu_core::command::ImageCopyTexture {
+    texture: source_texture_resource.0,
+    mip_level: args.source.mip_level.unwrap_or(0),
+    origin: args.source.origin.map_or(Default::default(), |origin| {
+      wgpu_types::Origin3d {
+        x: origin.x.unwrap_or(0),
+        y: origin.y.unwrap_or(0),
+        z: origin.z.unwrap_or(0),
+      }
+    }),
+  };
+  let destination = wgpu_core::command::ImageCopyTexture {
+    texture: destination_texture_resource.0,
+    mip_level: args.destination.mip_level.unwrap_or(0),
+    origin: args
+      .destination
+      .origin
+      .map_or(Default::default(), |origin| wgpu_types::Origin3d {
+        x: origin.x.unwrap_or(0),
+        y: origin.y.unwrap_or(0),
+        z: origin.z.unwrap_or(0),
+      }),
+  };
+  gfx_ok!(command_encoder => instance.command_encoder_copy_texture_to_texture(
+    command_encoder,
+    &source,
+    &destination,
+    &wgpu_types::Extent3d {
+      width: args.copy_size.width.unwrap_or(1),
+      height: args.copy_size.height.unwrap_or(1),
+      depth_or_array_layers: args.copy_size.depth_or_array_layers.unwrap_or(1),
+    }
+  ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderPushDebugGroupArgs {
+  command_encoder_rid: ResourceId,
+  group_label: String,
+}
+
+pub fn op_webgpu_command_encoder_push_debug_group(
+  state: &mut OpState,
+  args: CommandEncoderPushDebugGroupArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+
+  gfx_ok!(command_encoder => instance
+    .command_encoder_push_debug_group(command_encoder, &args.group_label))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderPopDebugGroupArgs {
+  command_encoder_rid: ResourceId,
+}
+
+pub fn op_webgpu_command_encoder_pop_debug_group(
+  state: &mut OpState,
+  args: CommandEncoderPopDebugGroupArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+
+  gfx_ok!(command_encoder => instance.command_encoder_pop_debug_group(command_encoder))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderInsertDebugMarkerArgs {
+  command_encoder_rid: ResourceId,
+  marker_label: String,
+}
+
+pub fn op_webgpu_command_encoder_insert_debug_marker(
+  state: &mut OpState,
+  args: CommandEncoderInsertDebugMarkerArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+
+  gfx_ok!(command_encoder => instance.command_encoder_insert_debug_marker(
+    command_encoder,
+    &args.marker_label
+  ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderWriteTimestampArgs {
+  command_encoder_rid: ResourceId,
+  query_set: u32,
+  query_index: u32,
+}
+
+pub fn op_webgpu_command_encoder_write_timestamp(
+  state: &mut OpState,
+  args: CommandEncoderWriteTimestampArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+  let query_set_resource = state
+    .resource_table
+    .get::<super::WebGpuQuerySet>(args.query_set)
+    .ok_or_else(bad_resource_id)?;
+
+  gfx_ok!(command_encoder => instance.command_encoder_write_timestamp(
+    command_encoder,
+    query_set_resource.0,
+    args.query_index
+  ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderResolveQuerySetArgs {
+  command_encoder_rid: ResourceId,
+  query_set: u32,
+  first_query: u32,
+  query_count: u32,
+  destination: u32,
+  destination_offset: u64,
+}
+
+pub fn op_webgpu_command_encoder_resolve_query_set(
+  state: &mut OpState,
+  args: CommandEncoderResolveQuerySetArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let command_encoder_resource = state
+    .resource_table
+    .get::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+  let query_set_resource = state
+    .resource_table
+    .get::<super::WebGpuQuerySet>(args.query_set)
+    .ok_or_else(bad_resource_id)?;
+  let destination_resource = state
+    .resource_table
+    .get::<super::buffer::WebGpuBuffer>(args.destination)
+    .ok_or_else(bad_resource_id)?;
+
+  gfx_ok!(command_encoder => instance.command_encoder_resolve_query_set(
+    command_encoder,
+    query_set_resource.0,
+    args.first_query,
+    args.query_count,
+    destination_resource.0,
+    args.destination_offset
+  ))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CommandEncoderFinishArgs {
+  command_encoder_rid: ResourceId,
+  label: Option<String>,
+}
+
+pub fn op_webgpu_command_encoder_finish(
+  state: &mut OpState,
+  args: CommandEncoderFinishArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let command_encoder_resource = state
+    .resource_table
+    .take::<WebGpuCommandEncoder>(args.command_encoder_rid)
+    .ok_or_else(bad_resource_id)?;
+  let command_encoder = command_encoder_resource.0;
+  let instance = state.borrow::<super::Instance>();
+
+  let descriptor = wgpu_types::CommandBufferDescriptor {
+    label: args.label.map(Cow::from),
+  };
+
+  gfx_put!(command_encoder => instance.command_encoder_finish(
+    command_encoder,
+    &descriptor
+  ) => state, WebGpuCommandBuffer)
+}