DXC on DX12 in CI (#4571)

.github/workflows/ci.yml

@@ -10,6 +10,7 @@ on:
 env:
   CARGO_INCREMENTAL: false
   CARGO_TERM_COLOR: always
+  WGPU_DX12_COMPILER: dxc
   RUST_LOG: info
   RUST_BACKTRACE: full
   # This is the MSRV used by `wgpu` itself and all surrounding infrastructure.
@@ -353,6 +354,10 @@ jobs:
             . -> target
             xtask -> xtask/target
 
+      - name: (windows) install dxc
+        if: matrix.os == 'windows-2022'
+        uses: napokue/setup-dxc@v1.1.0
+
       - name: (windows) install warp
         if: matrix.os == 'windows-2022'
         shell: bash

examples/bunnymark/src/main.rs

@@ -372,8 +372,8 @@ static TEST: wgpu_example::framework::ExampleTestParams =
         comparisons: &[
             wgpu_test::ComparisonType::Mean(0.05),
             wgpu_test::ComparisonType::Percentile {
-                percentile: 0.95,
-                threshold: 0.05,
+                percentile: 0.99,
+                threshold: 0.19,
             },
         ],
         _phantom: std::marker::PhantomData::<Example>,

examples/common/src/framework.rs

@@ -156,7 +156,7 @@ async fn setup<E: Example>(title: &str) -> Setup {
 
     log::info!("Initializing the surface...");
 
-    let backends = wgpu::util::backend_bits_from_env().unwrap_or_else(wgpu::Backends::all);
+    let backends = wgpu::util::backend_bits_from_env().unwrap_or_default();
     let dx12_shader_compiler = wgpu::util::dx12_shader_compiler_from_env().unwrap_or_default();
     let gles_minor_version = wgpu::util::gles_minor_version_from_env().unwrap_or_default();
 

examples/timestamp-queries/src/main.rs

@@ -178,7 +178,7 @@ impl Queries {
 #[cfg_attr(test, allow(unused))]
 async fn run() {
     // Instantiates instance of wgpu
-    let backends = wgpu::util::backend_bits_from_env().unwrap_or_else(wgpu::Backends::all);
+    let backends = wgpu::util::backend_bits_from_env().unwrap_or_default();
     let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
         backends,
         flags: wgpu::InstanceFlags::from_build_config().with_env(),

tests/tests/multi-instance.rs

@@ -3,7 +3,7 @@
 async fn get() -> wgpu::Adapter {
     let adapter = {
         let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
-            backends: wgpu::util::backend_bits_from_env().unwrap_or_else(wgpu::Backends::all),
+            backends: wgpu::util::backend_bits_from_env().unwrap_or_default(),
             ..Default::default()
         });
         instance

wgpu-hal/src/dx12/adapter.rs

@@ -1,6 +1,6 @@
 use crate::{
     auxil::{self, dxgi::result::HResult as _},
-    dx12::SurfaceTarget,
+    dx12::{shader_compilation, SurfaceTarget},
 };
 use std::{mem, ptr, sync::Arc, thread};
 use winapi::{
@@ -50,7 +50,7 @@ impl super::Adapter {
         adapter: d3d12::DxgiAdapter,
         library: &Arc<d3d12::D3D12Lib>,
         instance_flags: wgt::InstanceFlags,
-        dx12_shader_compiler: &wgt::Dx12Compiler,
+        dxc_container: Option<Arc<shader_compilation::DxcContainer>>,
     ) -> Option<crate::ExposedAdapter<super::Api>> {
         // Create the device so that we can get the capabilities.
         let device = {
@@ -305,7 +305,7 @@ impl super::Adapter {
                 private_caps,
                 presentation_timer,
                 workarounds,
-                dx12_shader_compiler: dx12_shader_compiler.clone(),
+                dxc_container,
             },
             info,
             features,
@@ -421,7 +421,7 @@ impl crate::Adapter<super::Api> for super::Adapter {
             limits,
             self.private_caps,
             &self.library,
-            self.dx12_shader_compiler.clone(),
+            self.dxc_container.clone(),
         )?;
         Ok(crate::OpenDevice {
             device,

wgpu-hal/src/dx12/device.rs

@@ -1,4 +1,7 @@
-use crate::auxil::{self, dxgi::result::HResult as _};
+use crate::{
+    auxil::{self, dxgi::result::HResult as _},
+    dx12::shader_compilation,
+};
 
 use super::{conv, descriptor, view};
 use parking_lot::Mutex;
@@ -19,7 +22,7 @@ impl super::Device {
         limits: &wgt::Limits,
         private_caps: super::PrivateCapabilities,
         library: &Arc<d3d12::D3D12Lib>,
-        dx12_shader_compiler: wgt::Dx12Compiler,
+        dxc_container: Option<Arc<shader_compilation::DxcContainer>>,
     ) -> Result<Self, crate::DeviceError> {
         let mem_allocator = if private_caps.suballocation_supported {
             super::suballocation::create_allocator_wrapper(&raw)?
@@ -27,14 +30,6 @@ impl super::Device {
             None
         };
 
-        let dxc_container = match dx12_shader_compiler {
-            wgt::Dx12Compiler::Dxc {
-                dxil_path,
-                dxc_path,
-            } => super::shader_compilation::get_dxc_container(dxc_path, dxil_path)?,
-            wgt::Dx12Compiler::Fxc => None,
-        };
-
         let mut idle_fence = d3d12::Fence::null();
         let hr = unsafe {
             profiling::scope!("ID3D12Device::CreateFence");

wgpu-hal/src/dx12/instance.rs

@@ -72,6 +72,27 @@ impl crate::Instance<super::Api> for super::Instance {
             }
         }
 
+        // Initialize DXC shader compiler
+        let dxc_container = match desc.dx12_shader_compiler.clone() {
+            wgt::Dx12Compiler::Dxc {
+                dxil_path,
+                dxc_path,
+            } => {
+                let container = super::shader_compilation::get_dxc_container(dxc_path, dxil_path)
+                    .map_err(|e| {
+                    crate::InstanceError::with_source(String::from("Failed to load DXC"), e)
+                })?;
+
+                container.map(Arc::new)
+            }
+            wgt::Dx12Compiler::Fxc => None,
+        };
+
+        match dxc_container {
+            Some(_) => log::debug!("Using DXC for shader compilation"),
+            None => log::debug!("Using FXC for shader compilation"),
+        }
+
         Ok(Self {
             // The call to create_factory will only succeed if we get a factory4, so this is safe.
             factory,
@@ -80,7 +101,7 @@ impl crate::Instance<super::Api> for super::Instance {
             _lib_dxgi: lib_dxgi,
             supports_allow_tearing,
             flags: desc.flags,
-            dx12_shader_compiler: desc.dx12_shader_compiler.clone(),
+            dxc_container,
         })
     }
 
@@ -112,7 +133,7 @@ impl crate::Instance<super::Api> for super::Instance {
         adapters
             .into_iter()
             .filter_map(|raw| {
-                super::Adapter::expose(raw, &self.library, self.flags, &self.dx12_shader_compiler)
+                super::Adapter::expose(raw, &self.library, self.flags, self.dxc_container.clone())
             })
             .collect()
     }

wgpu-hal/src/dx12/mod.rs

@@ -95,7 +95,7 @@ pub struct Instance {
     supports_allow_tearing: bool,
     _lib_dxgi: d3d12::DxgiLib,
     flags: wgt::InstanceFlags,
-    dx12_shader_compiler: wgt::Dx12Compiler,
+    dxc_container: Option<Arc<shader_compilation::DxcContainer>>,
 }
 
 impl Instance {
@@ -211,7 +211,7 @@ pub struct Adapter {
     //Note: this isn't used right now, but we'll need it later.
     #[allow(unused)]
     workarounds: Workarounds,
-    dx12_shader_compiler: wgt::Dx12Compiler,
+    dxc_container: Option<Arc<shader_compilation::DxcContainer>>,
 }
 
 unsafe impl Send for Adapter {}
@@ -253,7 +253,7 @@ pub struct Device {
     render_doc: crate::auxil::renderdoc::RenderDoc,
     null_rtv_handle: descriptor::Handle,
     mem_allocator: Option<Mutex<suballocation::GpuAllocatorWrapper>>,
-    dxc_container: Option<shader_compilation::DxcContainer>,
+    dxc_container: Option<Arc<shader_compilation::DxcContainer>>,
 }
 
 unsafe impl Send for Device {}

wgpu-hal/src/dx12/shader_compilation.rs

@@ -99,7 +99,7 @@ mod dxc {
         let dxil = match hassle_rs::Dxil::new(dxil_path) {
             Ok(dxil) => dxil,
             Err(e) => {
-                log::warn!("Failed to load dxil.dll. Defaulting to Fxc instead: {}", e);
+                log::warn!("Failed to load dxil.dll. Defaulting to DXC instead: {}", e);
                 return Ok(None);
             }
         };
@@ -111,7 +111,7 @@ mod dxc {
             Ok(dxc) => dxc,
             Err(e) => {
                 log::warn!(
-                    "Failed to load dxcompiler.dll. Defaulting to Fxc instead: {}",
+                    "Failed to load dxcompiler.dll. Defaulting to FXC instead: {}",
                     e
                 );
                 return Ok(None);

wgpu-info/src/report.rs

@@ -17,7 +17,12 @@ pub struct GpuReport {
 
 impl GpuReport {
     pub fn generate() -> Self {
-        let instance = wgpu::Instance::new(wgpu::InstanceDescriptor::default());
+        let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
+            backends: wgpu::util::backend_bits_from_env().unwrap_or_default(),
+            flags: wgpu::InstanceFlags::debugging().with_env(),
+            dx12_shader_compiler: wgpu::util::dx12_shader_compiler_from_env().unwrap_or_default(),
+            gles_minor_version: wgpu::util::gles_minor_version_from_env().unwrap_or_default(),
+        });
         let adapters = instance.enumerate_adapters(wgpu::Backends::all());
 
         let mut devices = Vec::with_capacity(adapters.len());

wgpu-types/src/lib.rs

@@ -177,6 +177,12 @@ bitflags::bitflags! {
     }
 }
 
+impl Default for Backends {
+    fn default() -> Self {
+        Self::all()
+    }
+}
+
 impl_bitflags!(Backends);
 
 impl From<Backend> for Backends {