Hi :)
I'm trying to create a surface for WGPU on a mac:
// Earlier in the code
Glfw _glfw = Glfw.GetApi();
unsafe
{
_glfw.WindowHint(WindowHintBool.Resizable, false);
_glfw.WindowHint(WindowHintClientApi.ClientApi, ClientApi.NoApi);
_window = _glfw.CreateWindow(settings.Width, settings.Height, "Window Title", null, null);
if (_window == null)
throw new Exception("Failed to create a window");
}
// Creating the window
GlfwNativeWindow native = new(_glfw, _window);
instance.CreateSurfaceFromMetalLayer(native.Cocoa!.Value);just like in the example and it gives the error
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
left: `false`,
right: `true`', /Users/runner/.cargo/git/checkouts/wgpu-53e70f8674b08dd4/628a25e/wgpu-hal/src/metal/surface.rs:96:9
stack backtrace:
0: 0x1270e7bf8 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7f563e99e08996c8
1: 0x1270ff22c - core::fmt::write::h828d1a1d9994c0d4
2: 0x1270e5cf4 - std::io::Write::write_fmt::h5f89acb1837ba600
3: 0x1270e7a0c - std::sys_common::backtrace::print::h840392abbac6ee51
4: 0x1270e8cb4 - std::panicking::default_hook::{{closure}}::h4759ed42ee25f714
5: 0x1270e8a0c - std::panicking::default_hook::h0e3a71e8a2850720
6: 0x1270e92f0 - std::panicking::rust_panic_with_hook::h7210718e7f3b5517
7: 0x1270e9100 - std::panicking::begin_panic_handler::{{closure}}::h783370b8bddac8b4
8: 0x1270e8060 - std::sys_common::backtrace::__rust_end_short_backtrace::h33a0191324141f1f
9: 0x1270e8e54 - _rust_begin_unwind
10: 0x12711fae4 - core::panicking::panic_fmt::h8c7962154a272fe6
11: 0x1270fd304 - core::panicking::assert_failed_inner::hfc6afabce53d8387
12: 0x12710e140 - core::panicking::assert_failed::hb9b4375de7f0a30a
13: 0x126dcc614 - wgpu_hal::metal::surface::<impl wgpu_hal::metal::Surface>::from_layer::h2fd9fe1c7207aa5b
14: 0x126dcef54 - wgpu_hal::metal::Instance::create_surface_from_layer::h6b2ec2ffa1aa9ad9
15: 0x126ac6358 - wgpu_core::instance::<impl wgpu_core::hub::Global<G>>::instance_create_surface_metal::{{closure}}::h134f83a8b2b532f9
16: 0x126beb8a0 - core::option::Option<T>::map::h380bc1f5713ebcef
17: 0x126b23988 - wgpu_core::instance::<impl wgpu_core::hub::Global<G>>::instance_create_surface_metal::hb40418e2f49952bb
18: 0x126c95f2c - _wgpuInstanceCreateSurface
fatal runtime error: failed to initiate panic, error 5
So I looked at the piece of code that's causing the issue
pub unsafe fn from_layer(layer: &mtl::MetalLayerRef) -> Self {
let class = class!(CAMetalLayer);
let proper_kind: BOOL = msg_send![layer, isKindOfClass: class];
assert_eq!(proper_kind, YES); // <-- Error
Self::new(None, layer.to_owned())
}I thought maybe I was doing something wrong so I tried WGPU.Tests (the one in this repo) instead but I get the same error. I suspect it might be something to do with Metal and Cocoa not being the same thing but I'm not very familiar with Apple-specific development and online articles seem to intertwine the two. Even the winit crate uses cocoa and metal handles as the same thing.
I have no idea how to fix this, do you have any idea of what could be wrong here?
Hi :)
I'm trying to create a surface for WGPU on a mac:
just like in the example and it gives the error
So I looked at the piece of code that's causing the issue
I thought maybe I was doing something wrong so I tried WGPU.Tests (the one in this repo) instead but I get the same error. I suspect it might be something to do with Metal and Cocoa not being the same thing but I'm not very familiar with Apple-specific development and online articles seem to intertwine the two. Even the
winitcrate uses cocoa and metal handles as the same thing.I have no idea how to fix this, do you have any idea of what could be wrong here?