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![Divy Srivastava](/assets/img/avatar_default.png)
This PR contains the implementation of the External webgpu surfaces /
BYOW proposal. BYOW stands for "Bring your own window".
Closes #21713
Adds `Deno.UnsafeWindowSurface` ( `--unstable-webgpu` API) to the `Deno`
namespace:
```typescript
class UnsafeWindowSurface {
constructor(
system: "cocoa" | "x11" | "win32",
winHandle: Deno.PointerValue,
displayHandle: Deno.PointerValue | null
);
getContext(type: "webgpu"): GPUCanvasContext;
present(): void;
}
```
For the initial pass, I've opted to support the three major windowing
systems. The parameters correspond to the table below:
| system | winHandle | displayHandle |
| ----------------- | ---------- | ------- |
| "cocoa" (macOS) | `NSView*` | - |
| "win32" (Windows) | `HWND` | `HINSTANCE` |
| "x11" (Linux) | Xlib `Window` | Xlib `Display*` |
Ecosystem support:
- [x] deno_sdl2 (sdl2) -
[mod.ts#L1209](7e177bc652/mod.ts (L1209)
)
- [x] dwm (glfw) - https://github.com/deno-windowing/dwm/issues/29
- [ ] pane (winit)
<details>
<summary>Example</summary>
```typescript
// A simple clear screen pass, colors based on mouse position.
import { EventType, WindowBuilder } from "https://deno.land/x/sdl2@0.7.0/mod.ts";
const window = new WindowBuilder("sdl2 + deno + webgpu", 640, 480).build();
const [system, windowHandle, displayHandle] = window.rawHandle();
const adapter = await navigator.gpu.requestAdapter();
const device = await adapter.requestDevice();
const context = Deno.createWindowSurface(system, windowHandle, displayHandle);
context.configure({
device: device,
format: "bgra8unorm",
height: 480,
width: 640,
});
let r = 0.0;
let g = 0.0;
let b = 0.0;
for (const event of window.events()) {
if (event.type === EventType.Quit) {
break;
} else if (event.type === EventType.Draw) {
const textureView = context.getCurrentTexture().createView();
const renderPassDescriptor: GPURenderPassDescriptor = {
colorAttachments: [
{
view: textureView,
clearValue: { r, g, b, a: 1.0 },
loadOp: "clear",
storeOp: "store",
},
],
};
const commandEncoder = device.createCommandEncoder();
const passEncoder = commandEncoder.beginRenderPass(renderPassDescriptor);
passEncoder.end();
device.queue.submit([commandEncoder.finish()]);
Deno.presentGPUCanvasContext(context);
}
if (event.type === EventType.MouseMotion) {
r = event.x / 640;
g = event.y / 480;
b = 1.0 - r - g;
}
}
```
You can find more examples in the linked tracking issue.
</details>
---------
Signed-off-by: Divy Srivastava <dj.srivastava23@gmail.com>
128 lines
3.2 KiB
Rust
128 lines
3.2 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::type_error;
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use deno_core::error::AnyError;
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use deno_core::op2;
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use deno_core::OpState;
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use deno_core::ResourceId;
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use std::ffi::c_void;
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use crate::surface::WebGpuSurface;
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#[op2(fast)]
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#[smi]
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pub fn op_webgpu_surface_create(
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state: &mut OpState,
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#[string] system: &str,
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p1: *const c_void,
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p2: *const c_void,
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) -> Result<ResourceId, AnyError> {
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let instance = state.borrow::<super::Instance>();
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// Security note:
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//
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// The `p1` and `p2` parameters are pointers to platform-specific window
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// handles.
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//
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// The code below works under the assumption that:
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//
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// - handles can only be created by the FFI interface which
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// enforces --allow-ffi.
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//
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// - `*const c_void` deserizalizes null and v8::External.
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//
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// - Only FFI can export v8::External to user code.
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if p1.is_null() {
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return Err(type_error("Invalid parameters"));
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}
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let (win_handle, display_handle) = raw_window(system, p1, p2)?;
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let surface =
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instance.instance_create_surface(display_handle, win_handle, ());
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let rid = state
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.resource_table
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.add(WebGpuSurface(instance.clone(), surface));
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Ok(rid)
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}
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type RawHandles = (
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raw_window_handle::RawWindowHandle,
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raw_window_handle::RawDisplayHandle,
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);
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#[cfg(target_os = "macos")]
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fn raw_window(
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system: &str,
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ns_window: *const c_void,
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ns_view: *const c_void,
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) -> Result<RawHandles, AnyError> {
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if system != "cocoa" {
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return Err(type_error("Invalid system on macOS"));
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}
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let win_handle = {
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let mut handle = raw_window_handle::AppKitWindowHandle::empty();
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handle.ns_window = ns_window as *mut c_void;
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handle.ns_view = ns_view as *mut c_void;
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raw_window_handle::RawWindowHandle::AppKit(handle)
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};
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let display_handle = raw_window_handle::RawDisplayHandle::AppKit(
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raw_window_handle::AppKitDisplayHandle::empty(),
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);
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Ok((win_handle, display_handle))
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}
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#[cfg(target_os = "windows")]
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fn raw_window(
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system: &str,
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window: *const c_void,
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hinstance: *const c_void,
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) -> Result<RawHandles, AnyError> {
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use raw_window_handle::WindowsDisplayHandle;
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if system != "win32" {
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return Err(type_error("Invalid system on Windows"));
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}
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let win_handle = {
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use raw_window_handle::Win32WindowHandle;
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let mut handle = Win32WindowHandle::empty();
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handle.hwnd = window as *mut c_void;
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handle.hinstance = hinstance as *mut c_void;
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raw_window_handle::RawWindowHandle::Win32(handle)
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};
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let display_handle =
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raw_window_handle::RawDisplayHandle::Windows(WindowsDisplayHandle::empty());
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Ok((win_handle, display_handle))
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}
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#[cfg(target_os = "linux")]
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fn raw_window(
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system: &str,
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window: *const c_void,
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display: *const c_void,
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) -> Result<RawHandles, AnyError> {
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if system != "x11" {
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return Err(type_error("Invalid system on Linux"));
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}
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let win_handle = {
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let mut handle = raw_window_handle::XlibWindowHandle::empty();
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handle.window = window as *mut c_void as _;
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raw_window_handle::RawWindowHandle::Xlib(handle)
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};
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let display_handle = {
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let mut handle = raw_window_handle::XlibDisplayHandle::empty();
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handle.display = display as *mut c_void;
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raw_window_handle::RawDisplayHandle::Xlib(handle)
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};
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Ok((win_handle, display_handle))
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}
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