Implement GPUComputePassEncoder functions

Implement the `dispatch`, `endPass`, `setBindGroup`, `setPipeline` functions of `GPUComputePassEncoder`.

1 files changed, 63 insertions, 6 deletions

diff --git a/components/script/dom/gpucomputepassencoder.rs b/components/script/dom/gpucomputepassencoder.rs
index ecdd4407a8d..f6116c88f9d 100644
--- a/components/script/dom/gpucomputepassencoder.rs
+++ b/components/script/dom/gpucomputepassencoder.rs
@@ -10,8 +10,20 @@ 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::gpubindgroup::GPUBindGroup;
+use crate::dom::gpucomputepipeline::GPUComputePipeline;
 use dom_struct::dom_struct;
-use webgpu::{wgpu::command::RawPass, WebGPU};
+use std::cell::RefCell;
+use webgpu::{
+    wgpu::command::{
+        compute_ffi::{
+            wgpu_compute_pass_dispatch, wgpu_compute_pass_set_bind_group,
+            wgpu_compute_pass_set_pipeline,
+        },
+        RawPass,
+    },
+    WebGPU, WebGPUCommandEncoder, WebGPURequest,
+};
 
 #[dom_struct]
 pub struct GPUComputePassEncoder {
@@ -20,26 +32,26 @@ pub struct GPUComputePassEncoder {
     channel: WebGPU,
     label: DomRefCell<Option<DOMString>>,
     #[ignore_malloc_size_of = "defined in wgpu-core"]
-    pass: RawPass,
+    raw_pass: RefCell<Option<RawPass>>,
 }
 
 impl GPUComputePassEncoder {
-    pub fn new_inherited(channel: WebGPU, pass: RawPass) -> GPUComputePassEncoder {
+    fn new_inherited(channel: WebGPU, parent: WebGPUCommandEncoder) -> GPUComputePassEncoder {
         GPUComputePassEncoder {
             channel,
             reflector_: Reflector::new(),
             label: DomRefCell::new(None),
-            pass,
+            raw_pass: RefCell::new(Some(RawPass::new_compute(parent.0))),
         }
     }
 
     pub fn new(
         global: &GlobalScope,
         channel: WebGPU,
-        pass: RawPass,
+        parent: WebGPUCommandEncoder,
     ) -> DomRoot<GPUComputePassEncoder> {
         reflect_dom_object(
-            Box::new(GPUComputePassEncoder::new_inherited(channel, pass)),
+            Box::new(GPUComputePassEncoder::new_inherited(channel, parent)),
             global,
             GPUComputePassEncoderBinding::Wrap,
         )
@@ -56,4 +68,49 @@ impl GPUComputePassEncoderMethods for GPUComputePassEncoder {
     fn SetLabel(&self, value: Option<DOMString>) {
         *self.label.borrow_mut() = value;
     }
+
+    #[allow(unsafe_code)]
+    /// https://gpuweb.github.io/gpuweb/#dom-gpucomputepassencoder-dispatch
+    fn Dispatch(&self, x: u32, y: u32, z: u32) {
+        if let Some(raw_pass) = self.raw_pass.borrow_mut().as_mut() {
+            unsafe { wgpu_compute_pass_dispatch(raw_pass, x, y, z) };
+        }
+    }
+
+    #[allow(unsafe_code)]
+    /// https://gpuweb.github.io/gpuweb/#dom-gpurenderpassencoder-endpass
+    fn EndPass(&self) {
+        if let Some(raw_pass) = self.raw_pass.borrow_mut().take() {
+            let (pass_data, id) = unsafe { raw_pass.finish_compute() };
+
+            self.channel
+                .0
+                .send(WebGPURequest::RunComputePass(id, pass_data))
+                .unwrap();
+        }
+    }
+
+    #[allow(unsafe_code)]
+    /// https://gpuweb.github.io/gpuweb/#dom-gpuprogrammablepassencoder-setbindgroup
+    fn SetBindGroup(&self, index: u32, bind_group: &GPUBindGroup, dynamic_offsets: Vec<u32>) {
+        if let Some(raw_pass) = self.raw_pass.borrow_mut().as_mut() {
+            unsafe {
+                wgpu_compute_pass_set_bind_group(
+                    raw_pass,
+                    index,
+                    bind_group.id().0,
+                    dynamic_offsets.as_ptr(),
+                    dynamic_offsets.len(),
+                )
+            };
+        }
+    }
+
+    #[allow(unsafe_code)]
+    /// https://gpuweb.github.io/gpuweb/#dom-gpucomputepassencoder-setpipeline
+    fn SetPipeline(&self, pipeline: &GPUComputePipeline) {
+        if let Some(raw_pass) = self.raw_pass.borrow_mut().as_mut() {
+            unsafe { wgpu_compute_pass_set_pipeline(raw_pass, pipeline.id().0) };
+        }
+    }
 }