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/* 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/. */
#[macro_use]
extern crate log;
#[macro_use]
extern crate serde;
#[macro_use]
pub extern crate wgpu_native as wgpu;
use ipc_channel::ipc::{self, IpcReceiver, IpcSender};
use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
use servo_config::pref;
use wgpu::adapter_get_info;
#[derive(Debug, Deserialize, Serialize)]
pub enum WebGPUResponse {
RequestAdapter(String, WebGPUAdapter),
RequestDevice,
}
pub type WebGPUResponseResult = Result<WebGPUResponse, String>;
#[derive(Debug, Deserialize, Serialize)]
pub enum WebGPURequest {
RequestAdapter(
IpcSender<WebGPUResponseResult>,
wgpu::RequestAdapterOptions,
wgpu::AdapterId,
),
RequestDevice,
Exit(IpcSender<()>),
}
#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct WebGPU(pub IpcSender<WebGPURequest>);
impl WebGPU {
pub fn new() -> Option<Self> {
if !pref!(dom.webgpu.enabled) {
return None;
}
let (sender, receiver) = match ipc::channel() {
Ok(sender_and_receiver) => sender_and_receiver,
Err(e) => {
warn!(
"Failed to create sender and receiciver for WGPU thread ({})",
e
);
return None;
},
};
if let Err(e) = std::thread::Builder::new()
.name("WGPU".to_owned())
.spawn(move || {
WGPU::new(receiver).run();
})
{
warn!("Failed to spwan WGPU thread ({})", e);
return None;
}
Some(WebGPU(sender))
}
pub fn exit(&self, sender: IpcSender<()>) -> Result<(), &'static str> {
self.0
.send(WebGPURequest::Exit(sender))
.map_err(|_| "Failed to send Exit message")
}
}
struct WGPU {
receiver: IpcReceiver<WebGPURequest>,
global: wgpu::Global,
adapters: Vec<WebGPUAdapter>,
// Track invalid adapters https://gpuweb.github.io/gpuweb/#invalid
_invalid_adapters: Vec<WebGPUAdapter>,
}
impl WGPU {
fn new(receiver: IpcReceiver<WebGPURequest>) -> Self {
WGPU {
receiver,
global: wgpu::Global::new("webgpu-native"),
adapters: Vec::new(),
_invalid_adapters: Vec::new(),
}
}
fn deinit(self) {
self.global.delete()
}
fn run(mut self) {
while let Ok(msg) = self.receiver.recv() {
match msg {
WebGPURequest::RequestAdapter(sender, options, id) => {
let adapter_id = match wgpu::request_adapter(&self.global, &options, &[id]) {
Some(id) => id,
None => {
if let Err(e) =
sender.send(Err("Failed to get webgpu adapter".to_string()))
{
warn!(
"Failed to send response to WebGPURequest::RequestAdapter ({})",
e
)
}
return;
},
};
let adapter = WebGPUAdapter(adapter_id);
self.adapters.push(adapter);
let info =
gfx_select!(adapter_id => adapter_get_info(&self.global, adapter_id));
if let Err(e) =
sender.send(Ok(WebGPUResponse::RequestAdapter(info.name, adapter)))
{
warn!(
"Failed to send response to WebGPURequest::RequestAdapter ({})",
e
)
}
},
WebGPURequest::RequestDevice => {},
WebGPURequest::Exit(sender) => {
self.deinit();
if let Err(e) = sender.send(()) {
warn!("Failed to send response to WebGPURequest::Exit ({})", e)
}
return;
},
}
}
}
}
#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
pub struct WebGPUAdapter(pub wgpu::AdapterId);
impl MallocSizeOf for WebGPUAdapter {
fn size_of(&self, _ops: &mut MallocSizeOfOps) -> usize {
0
}
}
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