Not able to create pixel buffer with winit 0.29.2

[paulfrische]

Hello there! I've tried to create a pixel buffer with the following code but it ain't working with winit 0.29:

use pixels::{SurfaceTexture, Pixels};
use winit::{
    dpi::PhysicalSize,
    event_loop::EventLoop,
    window::WindowBuilder,
};

const WIDTH: u32 = 64;
const HEIGHT: u32 = 64;

fn main() {
    let event_loop = EventLoop::new().unwrap();

    let window = {
        WindowBuilder::new()
            .with_title("test test window")
            .with_inner_size(PhysicalSize::new(1000, 1000))
            .with_inner_size(PhysicalSize::new(1000, 1000))
            .with_resizable(false)
            .build(&event_loop)
            .unwrap()
    };

    let mut pixels =  {
        let window_size = window.inner_size();
        let surface_texture = SurfaceTexture::new(window_size.width, window_size.height, &window);
        Pixels::new(WIDTH, HEIGHT, surface_texture).unwrap()
    };
}

Compiler Error:

 error[E0277]: the trait bound `Window: pixels::raw_window_handle::HasRawWindowHandle` is not satisfied
   --> src/main.rs:26:90
    |
26  |         let surface_texture = SurfaceTexture::new(window_size.width, window_size.height, &window);
    |                               -------------------                                        ^^^^^^^ the trait `pixels::raw_window_handle::HasRawWind
owHandle` is not implemented for `Window`
    |                               |
    |                               required by a bound introduced by this call
    |
    = help: the following other types implement trait `pixels::raw_window_handle::HasRawWindowHandle`:
              pixels::raw_window_handle::WindowHandle<'_>
              &'a T

The same code works with winit 0.28

[J-Cake]

I watched Winit tick over to 0.29.2 a few hours ago 😆. Am having this issue too

[parasyte]

winit 0.29 updated raw-window-handle (again). But they reference three versions of it: https://github.com/rust-windowing/winit/blob/v0.29.2/Cargo.toml#L61-L63 via feature flags rwh_06, rwh_05, and rwh_04.

While we are still on raw-window-handle 0.5, you should be able to use winit 0.29 by changing its feature flags:

winit = { version = "0.29", default-features = false, features = ["rwh_05", "x11", "wayland", "wayland-dlopen", "wayland-csd-adwaita"] }

I have not personally tested this, but it should be a usable workaround for the time being.

We will be on rwh 0.5 for as long as wgpu is. And they just released 0.18 two days ago with rwh 0.5.

[nxsaken]

winit <0.28.7 is also broken on macOS Sonoma (see https://github.com/rust-windowing/winit/issues/2876), the examples crash.

@parasyte am I understanding correctly that we should just update all winit dependencies in pixels and its examples to 0.29 with the compatibility feature flags to close this issue?

[parasyte]

I'm not terribly concerned about the examples. The main crate is agnostic to whether winit is used for platform integration or something else. The only hard dependency is on raw-window-handle = "0.5". Any projects using pixels can choose any version of winit, given that it is also compatible with our raw-window-handle dependency.

But in short, yes, I think that fixing the examples are the only thing we can do for this issue.

[mkrasnitski]

Chiming in to say that wgpu 0.19 released last week and bumped their version of raw-window-handle to 0.6. It should therefore be possible for pixels to bump its wgpu dependency and enable using winit 0.29 with default features.

[parasyte]

Sounds good. There's an incomplete update to 0.18 in #386. I don't mind skipping a version, just pointing out that anyone who wants to do this work might find this PR a helpful starting point.

[mkrasnitski]

Update: I've been trying to upgrade winit and wgpu and have run into a few problems with CI:

1. game-loop currently only supports winit 0.28. There's an open PR: https://github.com/tuzz/game-loop/pull/21
2. imgui hasn't seen a release since april, but does support winit 0.29 if you use it as a git dependency.
3. imgui-wgpu-rs only supports wgpu 0.17 and winit 0.27 (and upgrading them requires taking imgui as a git dependency).
4. egui recently added support for wgpu 0.19, but they just had a recent release so a git dependency is needed for now.
5. fltk doesn't support raw-window-handle 0.6.
6. tao only added support for raw-window-handle 0.6 in version 0.24.

[oddman621]

This works for me. Try this: winit = { version = "0.29", features = ["rwh_05"] }