Panicked on wgpuSurfaceGetPreferredFormat on MacOS

Tested on two macs, Intel Xeon cpu w/ rx 6900 xt, and M1 Pro cpu/gpu.

Logs: non-verbose

thread '<unnamed>' panicked at src/lib.rs:3831:22:
Identifier refers to disabled backend feature "empty"
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
fatal runtime error: failed to initiate panic, error 5

verbose

matthewperiut@Matthews-Mac-Pro cmake-build-debug % ./learnwebgpu             
Requesting adapter...
Got adapter: 0x600002699910
Requesting device...
Got device: 0x6000006959c0
thread '<unnamed>' panicked at src/lib.rs:3831:22:
Identifier refers to disabled backend feature "empty"
stack backtrace:
   0:        0x1025293e5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h46bc8e86d021398c
   1:        0x102547313 - core::fmt::write::h1c24e945c7ef8357
   2:        0x10252773e - std::io::Write::write_fmt::hd9fe01a40900d808
   3:        0x1025291b9 - std::sys_common::backtrace::print::hdbfcabb7d363540a
   4:        0x10252a425 - std::panicking::default_hook::{{closure}}::hecb24382dfeeea98
   5:        0x10252a19e - std::panicking::default_hook::h78dca947ab9e89eb
   6:        0x10252a893 - std::panicking::rust_panic_with_hook::hb83cee65df04957a
   7:        0x10252a7a4 - std::panicking::begin_panic_handler::{{closure}}::hbe6e44d88f82bc77
   8:        0x1025298d9 - std::sys_common::backtrace::__rust_end_short_backtrace::h6560cb9c1f1224c1
   9:        0x10252a4e6 - _rust_begin_unwind
  10:        0x102572ca5 - core::panicking::panic_fmt::h2aac8cf45f7ae617
  11:        0x1022b016a - _wgpuSurfaceGetPreferredFormat
  12:        0x101796375 - _ZN11Application10InitializeEv
                               at /Users/matthewperiut/CLionProjects/learnwebgpu/main.cpp:134:36
  13:        0x101796078 - main
                               at /Users/matthewperiut/CLionProjects/learnwebgpu/main.cpp:46:11
  14:     0x7ff818f6d366 - <unknown>
fatal runtime error: failed to initiate panic, error 5
zsh: abort      ./learnwebgpu

Reported C++ that is causing the panic: WGPUTextureFormat surfaceFormat = wgpuSurfaceGetPreferredFormat(surface, adapter);

Output when the line is changed to WGPUTextureFormat surfaceFormat = WGPUTextureFormat_RGBA8Uint; Noted because on #393 which is very similar, someone commented "It looks like wgpu reports that the surface simply has zero supported formats" and this prints the other formats:

thread '<unnamed>' panicked at src/lib.rs:586:5:
Error in wgpuSurfaceConfigure: Validation Error

Caused by:
    Requested format Rgba8Uint is not in list of supported formats: [Bgra8Unorm, Bgra8UnormSrgb, Rgba16Float, Rgb10a2Unorm]

note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
fatal runtime error: failed to initiate panic, error 5

So then using a supported format, Rgba16Float (on the rx 6900 xt on macos) WGPUTextureFormat surfaceFormat = WGPUTextureFormat_RGBA16Float;

works great!

So the issue is just with wgpuSurfaceGetPreferredFormat itself. Additionally the same code under dawn works fine using wgpuSurfaceGetPreferredFormat.

Thanks all here for working on wgpu-native.

Additionally, I may be doing something incorrectly on my end, I apologize if so and would appreciate feedback.

gfx-rs / wgpu-native

Panicked on wgpuSurfaceGetPreferredFormat on MacOS #399