Merge pull request #70315 from RandomShaper/d3d12_mesa

Direct3D 12 Rendering Driver (Mesa NIR approach)

.github/workflows/windows_builds.yml

@@ -7,7 +7,7 @@ on:
 env:
   # Used for the cache key. Add version suffix to force clean build.
   GODOT_BASE_BRANCH: master
-  SCONSFLAGS: verbose=yes warnings=extra werror=yes module_text_server_fb_enabled=yes
+  SCONSFLAGS: verbose=yes warnings=extra werror=yes module_text_server_fb_enabled=yes d3d12=yes "dxc_path=${{github.workspace}}/dxc" "mesa_libs=${{github.workspace}}/godot-nir-static"
   SCONS_CACHE_MSVC_CONFIG: true
 
 concurrency:
@@ -49,6 +49,28 @@ jobs:
       - name: Setup python and scons
         uses: ./.github/actions/godot-deps
 
+      - name: Download pre-built DirectX Shader Compiler
+        uses: dsaltares/fetch-gh-release-asset@1.0.0
+        with:
+          repo: Microsoft/DirectXShaderCompiler
+          version: tags/v1.7.2308
+          file: dxc_2023_08_14.zip
+          target: dxc.zip
+
+      - name: Extract pre-built DirectX Shader Compiler
+        run: 7z x dxc.zip -o${{github.workspace}}/dxc
+
+      - name: Download pre-built Mesa-NIR
+        uses: dsaltares/fetch-gh-release-asset@1.0.0
+        with:
+          repo: godotengine/godot-nir-static
+          version: tags/23.1.0-devel
+          file: godot-nir-23.1.0-1-devel.zip
+          target: godot-nir-static.zip
+
+      - name: Extract pre-built Mesa-NIR
+        run: 7z x godot-nir-static.zip -o${{github.workspace}}/godot-nir-static
+
       - name: Setup MSVC problem matcher
         uses: ammaraskar/msvc-problem-matcher@master