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Initial implementation of WebGPU API
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47e39af0f3
commit
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30 changed files with 923 additions and 7 deletions
158
components/script/dom/gpu.rs
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158
components/script/dom/gpu.rs
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use crate::compartments::InCompartment;
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use crate::dom::bindings::codegen::Bindings::GPUBinding::GPURequestAdapterOptions;
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use crate::dom::bindings::codegen::Bindings::GPUBinding::{self, GPUMethods, GPUPowerPreference};
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use crate::dom::bindings::error::Error;
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use crate::dom::bindings::refcounted::{Trusted, TrustedPromise};
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use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::bindings::str::DOMString;
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use crate::dom::globalscope::GlobalScope;
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use crate::dom::gpuadapter::GPUAdapter;
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use crate::dom::promise::Promise;
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use crate::task_source::TaskSource;
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use dom_struct::dom_struct;
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use ipc_channel::ipc::{self, IpcSender};
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use ipc_channel::router::ROUTER;
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use js::jsapi::Heap;
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use std::rc::Rc;
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use webgpu::wgpu;
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use webgpu::{WebGPU, WebGPURequest, WebGPUResponse, WebGPUResponseResult};
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#[dom_struct]
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pub struct GPU {
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reflector_: Reflector,
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}
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impl GPU {
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pub fn new_inherited() -> GPU {
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GPU {
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reflector_: Reflector::new(),
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}
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}
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pub fn new(global: &GlobalScope) -> DomRoot<GPU> {
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reflect_dom_object(Box::new(GPU::new_inherited()), global, GPUBinding::Wrap)
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}
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fn wgpu_channel(&self) -> Option<WebGPU> {
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self.global().as_window().webgpu_channel()
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}
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}
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pub trait AsyncWGPUListener {
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fn handle_response(&self, response: WebGPUResponse, promise: &Rc<Promise>);
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}
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struct WGPUResponse<T: AsyncWGPUListener + DomObject> {
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trusted: TrustedPromise,
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receiver: Trusted<T>,
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}
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impl<T: AsyncWGPUListener + DomObject> WGPUResponse<T> {
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#[allow(unrooted_must_root)]
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fn response(self, response: WebGPUResponseResult) {
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let promise = self.trusted.root();
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match response {
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Ok(response) => self.receiver.root().handle_response(response, &promise),
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Err(error) => promise.reject_error(Error::Type(format!(
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"Received error from WebGPU thread: {}",
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error
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))),
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}
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}
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}
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pub fn response_async<T: AsyncWGPUListener + DomObject + 'static>(
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promise: &Rc<Promise>,
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receiver: &T,
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) -> IpcSender<WebGPUResponseResult> {
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let (action_sender, action_receiver) = ipc::channel().unwrap();
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let (task_source, canceller) = receiver
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.global()
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.as_window()
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.task_manager()
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.dom_manipulation_task_source_with_canceller();
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let mut trusted = Some(TrustedPromise::new(promise.clone()));
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let trusted_receiver = Trusted::new(receiver);
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ROUTER.add_route(
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action_receiver.to_opaque(),
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Box::new(move |message| {
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let trusted = if let Some(trusted) = trusted.take() {
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trusted
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} else {
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error!("WebGPU callback called twice!");
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return;
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};
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let context = WGPUResponse {
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trusted,
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receiver: trusted_receiver.clone(),
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};
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let result = task_source.queue_with_canceller(
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task!(process_webgpu_task: move|| {
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context.response(message.to().unwrap());
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}),
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&canceller,
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);
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if let Err(err) = result {
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error!("Failed to queue GPU listener-task: {:?}", err);
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}
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}),
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);
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action_sender
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}
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impl GPUMethods for GPU {
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// https://gpuweb.github.io/gpuweb/#dom-gpu-requestadapter
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fn RequestAdapter(
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&self,
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options: &GPURequestAdapterOptions,
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comp: InCompartment,
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) -> Rc<Promise> {
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let promise = Promise::new_in_current_compartment(&self.global(), comp);
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let sender = response_async(&promise, self);
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let power_preference = match options.powerPreference {
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Some(GPUPowerPreference::Low_power) => wgpu::PowerPreference::LowPower,
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Some(GPUPowerPreference::High_performance) => wgpu::PowerPreference::HighPerformance,
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None => wgpu::PowerPreference::Default,
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};
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match self.wgpu_channel() {
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Some(channel) => {
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channel
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.0
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.send(WebGPURequest::RequestAdapter(
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sender,
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wgpu::RequestAdapterOptions { power_preference },
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))
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.unwrap();
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},
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None => promise.reject_error(Error::Type("No WebGPU thread...".to_owned())),
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};
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promise
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}
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}
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impl AsyncWGPUListener for GPU {
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fn handle_response(&self, response: WebGPUResponse, promise: &Rc<Promise>) {
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match response {
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WebGPUResponse::RequestAdapter(name, adapter) => {
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let adapter = GPUAdapter::new(
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&self.global(),
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DOMString::from(name),
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Heap::default(),
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adapter,
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);
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promise.resolve_native(&adapter);
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},
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response => promise.reject_error(Error::Type(format!(
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"Wrong response received for GPU from WebGPU thread {:?}",
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response,
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))),
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}
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}
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}
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