1 files changed, 431 insertions, 0 deletions
diff --git a/ext/webgpu/src/pipeline.rs b/ext/webgpu/src/pipeline.rs
new file mode 100644
index 000000000..0c1bc444f
--- /dev/null
+++ b/ext/webgpu/src/pipeline.rs
@@ -0,0 +1,431 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+use deno_core::error::AnyError;
+use deno_core::ResourceId;
+use deno_core::{OpState, Resource};
+use serde::Deserialize;
+use serde::Serialize;
+use std::borrow::Cow;
+use std::convert::{TryFrom, TryInto};
+
+use super::error::WebGpuError;
+use super::error::WebGpuResult;
+
+const MAX_BIND_GROUPS: usize = 8;
+
+pub(crate) struct WebGpuPipelineLayout(
+  pub(crate) wgpu_core::id::PipelineLayoutId,
+);
+impl Resource for WebGpuPipelineLayout {
+  fn name(&self) -> Cow<str> {
+    "webGPUPipelineLayout".into()
+  }
+}
+
+pub(crate) struct WebGpuComputePipeline(
+  pub(crate) wgpu_core::id::ComputePipelineId,
+);
+impl Resource for WebGpuComputePipeline {
+  fn name(&self) -> Cow<str> {
+    "webGPUComputePipeline".into()
+  }
+}
+
+pub(crate) struct WebGpuRenderPipeline(
+  pub(crate) wgpu_core::id::RenderPipelineId,
+);
+impl Resource for WebGpuRenderPipeline {
+  fn name(&self) -> Cow<str> {
+    "webGPURenderPipeline".into()
+  }
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuProgrammableStage {
+  module: ResourceId,
+  entry_point: String,
+  // constants: HashMap<String, GPUPipelineConstantValue>
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CreateComputePipelineArgs {
+  device_rid: ResourceId,
+  label: Option<String>,
+  layout: Option<ResourceId>,
+  compute: GpuProgrammableStage,
+}
+
+pub fn op_webgpu_create_compute_pipeline(
+  state: &mut OpState,
+  args: CreateComputePipelineArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let device_resource = state
+    .resource_table
+    .get::<super::WebGpuDevice>(args.device_rid)?;
+  let device = device_resource.0;
+
+  let pipeline_layout = if let Some(rid) = args.layout {
+    let id = state.resource_table.get::<WebGpuPipelineLayout>(rid)?;
+    Some(id.0)
+  } else {
+    None
+  };
+
+  let compute_shader_module_resource =
+    state
+      .resource_table
+      .get::<super::shader::WebGpuShaderModule>(args.compute.module)?;
+
+  let descriptor = wgpu_core::pipeline::ComputePipelineDescriptor {
+    label: args.label.map(Cow::from),
+    layout: pipeline_layout,
+    stage: wgpu_core::pipeline::ProgrammableStageDescriptor {
+      module: compute_shader_module_resource.0,
+      entry_point: Cow::from(args.compute.entry_point),
+      // TODO(lucacasonato): support args.compute.constants
+    },
+  };
+  let implicit_pipelines = match args.layout {
+    Some(_) => None,
+    None => Some(wgpu_core::device::ImplicitPipelineIds {
+      root_id: std::marker::PhantomData,
+      group_ids: &[std::marker::PhantomData; MAX_BIND_GROUPS],
+    }),
+  };
+
+  let (compute_pipeline, maybe_err) = gfx_select!(device => instance.device_create_compute_pipeline(
+    device,
+    &descriptor,
+    std::marker::PhantomData,
+    implicit_pipelines
+  ));
+
+  let rid = state
+    .resource_table
+    .add(WebGpuComputePipeline(compute_pipeline));
+
+  Ok(WebGpuResult::rid_err(rid, maybe_err))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ComputePipelineGetBindGroupLayoutArgs {
+  compute_pipeline_rid: ResourceId,
+  index: u32,
+}
+
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct PipelineLayout {
+  rid: ResourceId,
+  label: String,
+  err: Option<WebGpuError>,
+}
+
+pub fn op_webgpu_compute_pipeline_get_bind_group_layout(
+  state: &mut OpState,
+  args: ComputePipelineGetBindGroupLayoutArgs,
+  _: (),
+) -> Result<PipelineLayout, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let compute_pipeline_resource = state
+    .resource_table
+    .get::<WebGpuComputePipeline>(args.compute_pipeline_rid)?;
+  let compute_pipeline = compute_pipeline_resource.0;
+
+  let (bind_group_layout, maybe_err) = gfx_select!(compute_pipeline => instance.compute_pipeline_get_bind_group_layout(compute_pipeline, args.index, std::marker::PhantomData));
+
+  let label = gfx_select!(bind_group_layout => instance.bind_group_layout_label(bind_group_layout));
+
+  let rid = state
+    .resource_table
+    .add(super::binding::WebGpuBindGroupLayout(bind_group_layout));
+
+  Ok(PipelineLayout {
+    rid,
+    label,
+    err: maybe_err.map(WebGpuError::from),
+  })
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum GpuCullMode {
+  None,
+  Front,
+  Back,
+}
+
+impl From<GpuCullMode> for Option<wgpu_types::Face> {
+  fn from(value: GpuCullMode) -> Option<wgpu_types::Face> {
+    match value {
+      GpuCullMode::None => None,
+      GpuCullMode::Front => Some(wgpu_types::Face::Front),
+      GpuCullMode::Back => Some(wgpu_types::Face::Back),
+    }
+  }
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuPrimitiveState {
+  topology: wgpu_types::PrimitiveTopology,
+  strip_index_format: Option<wgpu_types::IndexFormat>,
+  front_face: wgpu_types::FrontFace,
+  cull_mode: GpuCullMode,
+  unclipped_depth: bool,
+}
+
+impl From<GpuPrimitiveState> for wgpu_types::PrimitiveState {
+  fn from(value: GpuPrimitiveState) -> wgpu_types::PrimitiveState {
+    wgpu_types::PrimitiveState {
+      topology: value.topology,
+      strip_index_format: value.strip_index_format,
+      front_face: value.front_face,
+      cull_mode: value.cull_mode.into(),
+      unclipped_depth: value.unclipped_depth,
+      polygon_mode: Default::default(), // native-only
+      conservative: false,              // native-only
+    }
+  }
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuDepthStencilState {
+  format: wgpu_types::TextureFormat,
+  depth_write_enabled: bool,
+  depth_compare: wgpu_types::CompareFunction,
+  stencil_front: wgpu_types::StencilFaceState,
+  stencil_back: wgpu_types::StencilFaceState,
+  stencil_read_mask: u32,
+  stencil_write_mask: u32,
+  depth_bias: i32,
+  depth_bias_slope_scale: f32,
+  depth_bias_clamp: f32,
+}
+
+impl TryFrom<GpuDepthStencilState> for wgpu_types::DepthStencilState {
+  type Error = AnyError;
+  fn try_from(
+    state: GpuDepthStencilState,
+  ) -> Result<wgpu_types::DepthStencilState, AnyError> {
+    Ok(wgpu_types::DepthStencilState {
+      format: state.format,
+      depth_write_enabled: state.depth_write_enabled,
+      depth_compare: state.depth_compare,
+      stencil: wgpu_types::StencilState {
+        front: state.stencil_front,
+        back: state.stencil_back,
+        read_mask: state.stencil_read_mask,
+        write_mask: state.stencil_write_mask,
+      },
+      bias: wgpu_types::DepthBiasState {
+        constant: state.depth_bias,
+        slope_scale: state.depth_bias_slope_scale,
+        clamp: state.depth_bias_clamp,
+      },
+    })
+  }
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuVertexBufferLayout {
+  array_stride: u64,
+  step_mode: wgpu_types::VertexStepMode,
+  attributes: Vec<wgpu_types::VertexAttribute>,
+}
+
+impl<'a> From<GpuVertexBufferLayout>
+  for wgpu_core::pipeline::VertexBufferLayout<'a>
+{
+  fn from(
+    layout: GpuVertexBufferLayout,
+  ) -> wgpu_core::pipeline::VertexBufferLayout<'a> {
+    wgpu_core::pipeline::VertexBufferLayout {
+      array_stride: layout.array_stride,
+      step_mode: layout.step_mode,
+      attributes: Cow::Owned(layout.attributes),
+    }
+  }
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuVertexState {
+  module: ResourceId,
+  entry_point: String,
+  buffers: Vec<Option<GpuVertexBufferLayout>>,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuMultisampleState {
+  count: u32,
+  mask: u64,
+  alpha_to_coverage_enabled: bool,
+}
+
+impl From<GpuMultisampleState> for wgpu_types::MultisampleState {
+  fn from(gms: GpuMultisampleState) -> wgpu_types::MultisampleState {
+    wgpu_types::MultisampleState {
+      count: gms.count,
+      mask: gms.mask,
+      alpha_to_coverage_enabled: gms.alpha_to_coverage_enabled,
+    }
+  }
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct GpuFragmentState {
+  targets: Vec<wgpu_types::ColorTargetState>,
+  module: u32,
+  entry_point: String,
+  // TODO(lucacasonato): constants
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CreateRenderPipelineArgs {
+  device_rid: ResourceId,
+  label: Option<String>,
+  layout: Option<ResourceId>,
+  vertex: GpuVertexState,
+  primitive: GpuPrimitiveState,
+  depth_stencil: Option<GpuDepthStencilState>,
+  multisample: wgpu_types::MultisampleState,
+  fragment: Option<GpuFragmentState>,
+}
+
+pub fn op_webgpu_create_render_pipeline(
+  state: &mut OpState,
+  args: CreateRenderPipelineArgs,
+  _: (),
+) -> Result<WebGpuResult, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let device_resource = state
+    .resource_table
+    .get::<super::WebGpuDevice>(args.device_rid)?;
+  let device = device_resource.0;
+
+  let layout = if let Some(rid) = args.layout {
+    let pipeline_layout_resource =
+      state.resource_table.get::<WebGpuPipelineLayout>(rid)?;
+    Some(pipeline_layout_resource.0)
+  } else {
+    None
+  };
+
+  let vertex_shader_module_resource =
+    state
+      .resource_table
+      .get::<super::shader::WebGpuShaderModule>(args.vertex.module)?;
+
+  let fragment = if let Some(fragment) = args.fragment {
+    let fragment_shader_module_resource =
+      state
+        .resource_table
+        .get::<super::shader::WebGpuShaderModule>(fragment.module)?;
+
+    let mut targets = Vec::with_capacity(fragment.targets.len());
+
+    for target in fragment.targets {
+      targets.push(target);
+    }
+
+    Some(wgpu_core::pipeline::FragmentState {
+      stage: wgpu_core::pipeline::ProgrammableStageDescriptor {
+        module: fragment_shader_module_resource.0,
+        entry_point: Cow::from(fragment.entry_point),
+      },
+      targets: Cow::from(targets),
+    })
+  } else {
+    None
+  };
+
+  let vertex_buffers = args
+    .vertex
+    .buffers
+    .into_iter()
+    .flatten()
+    .map(Into::into)
+    .collect();
+
+  let descriptor = wgpu_core::pipeline::RenderPipelineDescriptor {
+    label: args.label.map(Cow::Owned),
+    layout,
+    vertex: wgpu_core::pipeline::VertexState {
+      stage: wgpu_core::pipeline::ProgrammableStageDescriptor {
+        module: vertex_shader_module_resource.0,
+        entry_point: Cow::Owned(args.vertex.entry_point),
+      },
+      buffers: Cow::Owned(vertex_buffers),
+    },
+    primitive: args.primitive.into(),
+    depth_stencil: args.depth_stencil.map(TryInto::try_into).transpose()?,
+    multisample: args.multisample,
+    fragment,
+    multiview: None,
+  };
+
+  let implicit_pipelines = match args.layout {
+    Some(_) => None,
+    None => Some(wgpu_core::device::ImplicitPipelineIds {
+      root_id: std::marker::PhantomData,
+      group_ids: &[std::marker::PhantomData; MAX_BIND_GROUPS],
+    }),
+  };
+
+  let (render_pipeline, maybe_err) = gfx_select!(device => instance.device_create_render_pipeline(
+    device,
+    &descriptor,
+    std::marker::PhantomData,
+    implicit_pipelines
+  ));
+
+  let rid = state
+    .resource_table
+    .add(WebGpuRenderPipeline(render_pipeline));
+
+  Ok(WebGpuResult::rid_err(rid, maybe_err))
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct RenderPipelineGetBindGroupLayoutArgs {
+  render_pipeline_rid: ResourceId,
+  index: u32,
+}
+
+pub fn op_webgpu_render_pipeline_get_bind_group_layout(
+  state: &mut OpState,
+  args: RenderPipelineGetBindGroupLayoutArgs,
+  _: (),
+) -> Result<PipelineLayout, AnyError> {
+  let instance = state.borrow::<super::Instance>();
+  let render_pipeline_resource = state
+    .resource_table
+    .get::<WebGpuRenderPipeline>(args.render_pipeline_rid)?;
+  let render_pipeline = render_pipeline_resource.0;
+
+  let (bind_group_layout, maybe_err) = gfx_select!(render_pipeline => instance.render_pipeline_get_bind_group_layout(render_pipeline, args.index, std::marker::PhantomData));
+
+  let label = gfx_select!(bind_group_layout => instance.bind_group_layout_label(bind_group_layout));
+
+  let rid = state
+    .resource_table
+    .add(super::binding::WebGpuBindGroupLayout(bind_group_layout));
+
+  Ok(PipelineLayout {
+    rid,
+    label,
+    err: maybe_err.map(WebGpuError::from),
+  })
+}