Add VisionOS Support (#6888)

* Add visionos support

* Use `target_vendor = "apple"`

* Fixes

* Build VisionOS

* Gah

* Bleh

* Typos

---------

Co-authored-by: Guus Waals <_@guusw.nl>

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ env:
   # We sometimes need nightly to use special things in CI.
   #
   # In order to prevent CI regressions, we pin the nightly version.
-  NIGHTLY_VERSION: "nightly-2024-10-10"
+  NIGHTLY_VERSION: "nightly-2024-10-17"
   # This is the MSRV used by `wgpu` itself and all surrounding infrastructure.
   REPO_MSRV: "1.83"
   # This is the MSRV used by the `wgpu-core`, `wgpu-hal`, and `wgpu-types` crates,
@@ -111,6 +111,14 @@ jobs:
             target: aarch64-apple-ios
             kind: native
 
+          # VisionOS
+          - name: VisionOS aarch64
+            os: macos-14
+            target: aarch64-apple-visionos
+            kind: wgpu-only
+            toolchain: nightly
+            extra-flags: -Zbuild-std
+
           # Linux
           - name: Linux x86_64
             os: ubuntu-22.04
@@ -137,7 +145,7 @@ jobs:
           - name: Emscripten
             os: ubuntu-22.04
             target: wasm32-unknown-emscripten
-            kind: em
+            kind: wgpu-only
 
     name: Clippy ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
@@ -146,12 +154,31 @@ jobs:
       - name: checkout repo
         uses: actions/checkout@v4
 
-      - name: Install Repo MSRV toolchain
+      - name: Install Toolchain (Repo MSRV)
+        if: matrix.toolchain != 'nightly'
         run: |
-          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component clippy --target ${{ matrix.target }}
+          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component clippy
+          rustup target add ${{ matrix.target }} --toolchain ${{ env.REPO_MSRV }}
           rustup override set ${{ env.REPO_MSRV }}
           cargo -V
 
+      # In order to build on platforms that require a nightly toolchain, we install stable as expected,
+      # add the rust-src component, then tell stable to consider itself nightly by setting RUSTC_BOOTSTRAP=1.
+      #
+      # This is not formally "correct" thing to do, but it saves significant maintainer burden. If we were to
+      # use a proper nightly toolchain we would have to manually find a date that works. Even with a date that is
+      # carefully coordinated with the version of stable we are using, there are often mismatches of clippy lints
+      # between nightly and stable. This is a real mess. By using RUSTC_BOOTSTRAP=1, we get access to all the nice
+      # nightly features without needing to go through the hassle of maintaining a nightly toolchain.
+      #
+      # RUSTC_BOOTSTRAP=1 is how the rust project builds itself when bootstrapping the compiler, so while not "stable"
+      # it has been around for many years and don't anticipate it going away any time soon.
+      - name: Install Toolchain (Repo MSRV - Pseudo Nightly)
+        if: matrix.toolchain == 'nightly'
+        run: |
+          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component clippy,rust-src
+          echo "RUSTC_BOOTSTRAP=1" >> "$GITHUB_ENV"
+
       - name: disable debug
         shell: bash
         run: |
@@ -183,6 +210,7 @@ jobs:
           # the android sdk doesn't use the conventional name for ar, so explicitly set it.
           echo "AR_aarch64_linux_android=llvm-ar" >> "$GITHUB_ENV"
 
+      # Building for wasm32 requires a series of specific tests for the WebGPU backend.
       - name: check web
         if: matrix.kind == 'web'
         shell: bash
@@ -190,29 +218,31 @@ jobs:
           set -e
 
           # build for WebGPU
-          cargo clippy --target ${{ matrix.target }} --tests --features glsl,spirv,fragile-send-sync-non-atomic-wasm
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} --tests --features glsl,spirv,fragile-send-sync-non-atomic-wasm
-          cargo clippy --target ${{ matrix.target }} --tests --features glsl,spirv
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} --tests --features glsl,spirv
-          cargo doc --target ${{ matrix.target }} --no-deps --features glsl,spirv
+          cargo doc --target ${{ matrix.target }} ${{ matrix.extra-flags }} --no-deps --features glsl,spirv
 
           # all features
-          cargo clippy --target ${{ matrix.target }} --tests --all-features
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} --tests --all-features
-          cargo doc --target ${{ matrix.target }} --no-deps --all-features
+          cargo doc --target ${{ matrix.target }} ${{ matrix.extra-flags }} --no-deps --all-features
 
-      - name: check em
+      # Building for platforms where the tests do not compile.
-        if: matrix.kind == 'em'
+      - name: check wgpu only
+        if: matrix.kind == 'wgpu-only'
         shell: bash
         run: |
           set -e
 
-          # build for Emscripten
+          # check with no features
-          cargo clippy --target ${{ matrix.target }} -p wgpu -p wgpu-hal --no-default-features
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} -p wgpu -p wgpu-hal --no-default-features
 
           # Don't check samples since we use winit in our samples which has dropped support for Emscripten.
 
-          # all features
+          # Check with all features.
-          cargo clippy --target ${{ matrix.target }} -p wgpu-hal --all-features
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} -p wgpu-hal --all-features
-          cargo clippy --target ${{ matrix.target }} -p wgpu --all-features
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} -p wgpu --all-features
 
+      # Building for native platforms with standard tests.
       - name: check native
         if: matrix.kind == 'native'
         shell: bash
@@ -220,13 +250,13 @@ jobs:
           set -e
 
           # check with no features
-          cargo clippy --target ${{ matrix.target }} --no-default-features
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} --no-default-features
 
           # Check with all features.
-          cargo clippy --target ${{ matrix.target }} --tests --benches --all-features
+          cargo clippy --target ${{ matrix.target }} ${{ matrix.extra-flags }} --tests --benches --all-features
 
           # build docs
-          cargo doc --target ${{ matrix.target }} --all-features --no-deps
+          cargo doc --target ${{ matrix.target }} ${{ matrix.extra-flags }} --all-features --no-deps
 
       - name: check private item docs
         if: matrix.kind == 'native'
@@ -235,7 +265,7 @@ jobs:
           set -e
 
           # wgpu_core package
-          cargo doc --target ${{ matrix.target }} \
+          cargo doc --target ${{ matrix.target }} ${{ matrix.extra-flags }} \
                 --package wgpu-core \
                 --package wgpu-hal \
                 --package naga \

CHANGELOG.md

@@ -162,6 +162,7 @@ By @wumpf in [#6849](https://github.com/gfx-rs/wgpu/pull/6849).
 - Move raytracing alignments into HAL instead of in core. By @Vecvec in [#6563](https://github.com/gfx-rs/wgpu/pull/6563).
 - Allow for statically linking DXC rather than including separate `.dll` files. By @DouglasDwyer in [#6574](https://github.com/gfx-rs/wgpu/pull/6574).
 - `DeviceType` and `AdapterInfo` now impl `Hash` by @cwfitzgerald in [#6868](https://github.com/gfx-rs/wgpu/pull/6868)
+- Add build support for Apple Vision Pro. By @guusw in [#6611](https://github.com/gfx-rs/wgpu/pull/6611).
 - Add `wgsl_language_features` for obtaining available WGSL language feature by @sagudev in [#6814](https://github.com/gfx-rs/wgpu/pull/6814)
 
 ##### Vulkan
@@ -171,6 +172,7 @@ By @wumpf in [#6849](https://github.com/gfx-rs/wgpu/pull/6849).
 ##### Metal
 
 - Allow using some 32-bit floating-point atomic operations (load, store, add, sub, exchange) in shaders. It requires Metal 3.0+ with Apple 7, 8, 9 or Mac 2. By @AsherJingkongChen in [#6234](https://github.com/gfx-rs/wgpu/pull/6234).
+- Add build support for Apple Vision Pro. By @guusw in [#6611](https://github.com/gfx-rs/wgpu/pull/6611).
 
 #### Changes
 

deno_webgpu/Cargo.toml

@@ -36,7 +36,7 @@ features = [
 ]
 
 # We want the wgpu-core Metal backend on macOS and iOS.
-[target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies.wgpu-core]
+[target.'cfg(target_vendor = "apple")'.dependencies.wgpu-core]
 workspace = true
 features = ["metal"]
 

naga/build.rs

@@ -3,7 +3,7 @@ fn main() {
         dot_out: { feature = "dot-out" },
         glsl_out: { feature = "glsl-out" },
         hlsl_out: { any(feature = "hlsl-out", all(target_os = "windows", feature = "hlsl-out-if-target-windows")) },
-        msl_out: { any(feature = "msl-out", all(any(target_os = "ios", target_os = "macos"), feature = "msl-out-if-target-apple")) },
+        msl_out: { any(feature = "msl-out", all(target_vendor = "apple", feature = "msl-out-if-target-apple")) },
         spv_out: { feature = "spv-out" },
         wgsl_out: { feature = "wgsl-out" },
     }

naga/fuzz/Cargo.toml

@@ -15,7 +15,7 @@ arbitrary = { version = "1.4.1", features = ["derive"] }
 # See https://github.com/rust-fuzz/libfuzzer/issues/126
 libfuzzer-sys = ">0.4.0,<=0.4.7"
 
-[target.'cfg(not(any(target_arch = "wasm32", target_os = "ios")))'.dependencies.naga]
+[target.'cfg(not(any(target_arch = "wasm32", target_os = "ios", target_os = "visionos")))'.dependencies.naga]
 path = ".."
 version = "23.0.0"
 features = ["arbitrary", "spv-in", "wgsl-in", "glsl-in"]

naga/xtask/src/validate.rs

@@ -150,7 +150,7 @@ fn collect_validation_jobs(jobs: &mut Vec<Job>, cmd: ValidateSubcommand) -> anyh
                     | ValidateSubcommand::Spirv
                     | ValidateSubcommand::Glsl
                     | ValidateSubcommand::Dot => true,
-                    ValidateSubcommand::Metal => cfg!(any(target_os = "macos", target_os = "ios")),
+                    ValidateSubcommand::Metal => cfg!(target_vendor = "apple"),
                     // The FXC compiler is only available on Windows.
                     //
                     // The DXC compiler can be built and run on any platform,

wgpu-core/build.rs

@@ -7,7 +7,7 @@ fn main() {
         webgl: { all(target_arch = "wasm32", not(target_os = "emscripten"), gles) },
         dx12: { all(target_os = "windows", feature = "dx12") },
         gles: { all(feature = "gles") },
-        metal: { all(any(target_os = "ios", target_os = "macos"), feature = "metal") },
+        metal: { all(target_vendor = "apple", feature = "metal") },
         vulkan: { all(not(target_arch = "wasm32"), feature = "vulkan") }
     }
 }

wgpu-core/src/lib.rs

@@ -10,7 +10,7 @@
 #![cfg_attr(
     all(
         not(all(feature = "vulkan", not(target_arch = "wasm32"))),
-        not(all(feature = "metal", any(target_os = "macos", target_os = "ios"))),
+        not(all(feature = "metal", any(target_vendor = "apple"))),
         not(all(feature = "dx12", windows)),
         not(feature = "gles"),
     ),

wgpu-hal/Cargo.toml

@@ -177,7 +177,7 @@ glutin_wgl_sys = { workspace = true, optional = true }
 [target.'cfg(all(windows, not(target_arch = "aarch64")))'.dependencies]
 mach-dxcompiler-rs = { workspace = true, optional = true }
 
-[target.'cfg(any(target_os="macos", target_os="ios"))'.dependencies]
+[target.'cfg(target_vendor = "apple")'.dependencies]
 # backend: Metal
 block = { workspace = true, optional = true }
 
@@ -221,7 +221,7 @@ env_logger.workspace = true
 glam.workspace = true       # for ray-traced-triangle example
 winit.workspace = true      # for "halmark" example
 
-[target.'cfg(not(any(target_arch = "wasm32", target_os = "ios")))'.dev-dependencies]
+[target.'cfg(not(any(target_arch = "wasm32", target_os = "ios", target_os = "visionos")))'.dev-dependencies]
 glutin-winit = { workspace = true, features = [
     "egl",
     "wgl",

wgpu-hal/build.rs

@@ -9,7 +9,7 @@ fn main() {
         Emscripten: { all(target_os = "emscripten", gles) },
         dx12: { all(target_os = "windows", feature = "dx12") },
         gles: { all(feature = "gles") },
-        metal: { all(any(target_os = "ios", target_os = "macos"), feature = "metal") },
+        metal: { all(target_vendor = "apple", feature = "metal") },
         vulkan: { all(not(target_arch = "wasm32"), feature = "vulkan") },
         // ⚠️ Keep in sync with target.cfg() definition in Cargo.toml and cfg_alias in `wgpu` crate ⚠️
         static_dxc: { all(target_os = "windows", feature = "static-dxc", not(target_arch = "aarch64")) }

wgpu-hal/examples/halmark/main.rs

@@ -797,7 +797,7 @@ impl<A: hal::Api> Example<A> {
 
 cfg_if::cfg_if! {
     // Apple + Metal
-    if #[cfg(all(any(target_os = "macos", target_os = "ios"), feature = "metal"))] {
+    if #[cfg(all(target_vendor = "apple", feature = "metal"))] {
         type Api = hal::api::Metal;
     }
     // Wasm + Vulkan

wgpu-hal/examples/raw-gles.rs

@@ -10,7 +10,7 @@
 
 extern crate wgpu_hal as hal;
 
-#[cfg(not(any(target_arch = "wasm32", target_os = "ios")))]
+#[cfg(not(any(target_arch = "wasm32", target_os = "ios", target_os = "visionos")))]
 fn main() {
     use std::{ffi::CString, num::NonZeroU32};
 
@@ -256,7 +256,8 @@ fn main() {
 
 #[cfg(any(
     all(target_arch = "wasm32", not(target_os = "emscripten")),
-    target_os = "ios"
+    target_os = "ios",
+    target_os = "visionos"
 ))]
 fn main() {
     eprintln!("This example is not supported on Windows and non-emscripten wasm32")
@@ -264,7 +265,8 @@ fn main() {
 
 #[cfg(not(any(
     all(target_arch = "wasm32", not(target_os = "emscripten")),
-    target_os = "ios"
+    target_os = "ios",
+    target_os = "visionos"
 )))]
 fn fill_screen(exposed: &hal::ExposedAdapter<hal::api::Gles>, width: u32, height: u32) {
     use hal::{Adapter as _, CommandEncoder as _, Device as _, Queue as _};

wgpu-hal/examples/ray-traced-triangle/main.rs

@@ -1107,7 +1107,7 @@ impl<A: hal::Api> Example<A> {
 
 cfg_if::cfg_if! {
     // Apple + Metal
-    if #[cfg(all(any(target_os = "macos", target_os = "ios"), feature = "metal"))] {
+    if #[cfg(all(target_vendor = "apple", feature = "metal"))] {
         type Api = hal::api::Metal;
     }
     // Wasm + Vulkan

wgpu-hal/src/gles/egl.rs

@@ -785,7 +785,7 @@ impl crate::Instance for Instance {
                     "libEGL.dll",
                 )
             }
-        } else if cfg!(any(target_os = "macos", target_os = "ios")) {
+        } else if cfg!(target_vendor = "apple") {
             unsafe {
                 khronos_egl::DynamicInstance::<khronos_egl::EGL1_4>::load_required_from_filename(
                     "libEGL.dylib",

wgpu-hal/src/metal/mod.rs

@@ -121,7 +121,7 @@ impl crate::Instance for Instance {
         window_handle: raw_window_handle::RawWindowHandle,
     ) -> Result<Surface, crate::InstanceError> {
         match window_handle {
-            #[cfg(target_os = "ios")]
+            #[cfg(any(target_os = "ios", target_os = "visionos"))]
             raw_window_handle::RawWindowHandle::UiKit(handle) => {
                 Ok(unsafe { Surface::from_view(handle.ui_view.cast()) })
             }

wgpu-hal/src/vulkan/adapter.rs

@@ -1003,7 +1003,7 @@ impl PhysicalDeviceProperties {
         }
 
         // Require `VK_KHR_portability_subset` on macOS/iOS
-        #[cfg(any(target_os = "macos", target_os = "ios"))]
+        #[cfg(target_vendor = "apple")]
         extensions.push(khr::portability_subset::NAME);
 
         // Require `VK_EXT_texture_compression_astc_hdr` if the associated feature was requested

wgpu-hal/src/vulkan/instance.rs

@@ -881,7 +881,7 @@ impl crate::Instance for super::Instance {
             {
                 self.create_surface_from_view(handle.ns_view)
             }
-            #[cfg(all(target_os = "ios", feature = "metal"))]
+            #[cfg(all(any(target_os = "ios", target_os = "visionos"), feature = "metal"))]
             (Rwh::UiKit(handle), _)
                 if self.shared.extensions.contains(&ext::metal_surface::NAME) =>
             {

wgpu/Cargo.toml

@@ -150,7 +150,7 @@ features = ["indirect-validation"]
 
 # Enable `wgc` by default on macOS and iOS to allow the `metal` crate feature to
 # enable the Metal backend while being no-op on other targets.
-[target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies.wgc]
+[target.'cfg(target_vendor = "apple")'.dependencies.wgc]
 workspace = true
 
 # We want the wgpu-core Direct3D backend and OpenGL (via WGL) on Windows.
@@ -159,12 +159,12 @@ workspace = true
 features = ["gles"]
 
 # We want the wgpu-core Vulkan backend on Unix (but not emscripten, macOS, iOS) and Windows.
-[target.'cfg(any(windows, all(unix, not(target_os = "emscripten"), not(target_os = "ios"), not(target_os = "macos"))))'.dependencies.wgc]
+[target.'cfg(any(windows, all(unix, not(target_os = "emscripten"), not(target_vendor = "apple"))))'.dependencies.wgc]
 workspace = true
 features = ["vulkan"]
 
 # We want the wgpu-core GLES backend on Unix (but not macOS, iOS).
-[target.'cfg(all(unix, not(target_os = "ios"), not(target_os = "macos")))'.dependencies.wgc]
+[target.'cfg(all(unix, not(target_vendor = "apple")))'.dependencies.wgc]
 workspace = true
 features = ["gles"]
 
@@ -175,7 +175,7 @@ workspace = true
 [target.'cfg(any(not(target_arch = "wasm32"), target_os = "emscripten"))'.dependencies]
 hal = { workspace = true }
 
-[target.'cfg(all(not(target_arch = "wasm32"), unix, not(target_os = "ios"), not(target_os = "macos")))'.dependencies]
+[target.'cfg(all(not(target_arch = "wasm32"), unix, not(target_vendor = "apple")))'.dependencies]
 hal = { workspace = true, features = ["renderdoc"] }
 
 [target.'cfg(windows)'.dependencies]

wgpu/build.rs

@@ -10,7 +10,7 @@ fn main() {
             all(feature = "fragile-send-sync-non-atomic-wasm", not(target_feature = "atomics"))
         ) },
         dx12: { all(target_os = "windows", feature = "dx12") },
-        metal: { all(any(target_os = "ios", target_os = "macos"), feature = "metal") },
+        metal: { all(target_vendor = "apple", feature = "metal") },
         // This alias is _only_ if _we_ need naga in the wrapper. wgpu-core provides
         // its own re-export of naga, which can be used in other situations
         naga: { any(feature = "naga-ir", feature = "spirv", feature = "glsl") },

wgpu/src/api/instance.rs

@@ -82,9 +82,7 @@ impl Instance {
             }
 
             // Vulkan on Mac/iOS is only available through vulkan-portability.
-            if (cfg!(target_os = "ios") || cfg!(target_os = "macos"))
+            if cfg!(target_vendor = "apple") && cfg!(feature = "vulkan-portability") {
-                && cfg!(feature = "vulkan-portability")
-            {
                 backends = backends.union(Backends::VULKAN);
             }