Expose the DxgiAdapter in the Hal adapter (#7852)

Author: tronical

CHANGELOG.md

@@ -85,6 +85,7 @@ Bottom level categories:
 #### DX12
 
 - Get `vertex_index` & `instance_index` builtins working for indirect draws. By @teoxoy in [#7535](https://github.com/gfx-rs/wgpu/pull/7535)
+- Added `wgpu_hal::dx12::Adapter::as_raw()`. By @tronical in [##7852](https://github.com/gfx-rs/wgpu/pull/7852)
 
 #### Vulkan
 

wgpu-hal/src/dx12/mod.rs

@@ -604,6 +604,12 @@ pub struct Adapter {
 unsafe impl Send for Adapter {}
 unsafe impl Sync for Adapter {}
 
+impl Adapter {
+    pub fn as_raw(&self) -> &Dxgi::IDXGIAdapter3 {
+        &self.raw
+    }
+}
+
 struct Event(pub Foundation::HANDLE);
 impl Event {
     pub fn create(manual_reset: bool, initial_state: bool) -> Result<Self, crate::DeviceError> {