Vulkan test

.github/jobs/linux.yml

@@ -4,6 +4,7 @@ parameters:
   CC: ""
   CXX: ""
   JSEngine: ""
+  graphics_api: ""
   enableSanitizers: false
 
 jobs:
@@ -16,6 +17,10 @@ jobs:
       SANITIZER_FLAG: ${{coalesce(replace(format('{0}', parameters.enableSanitizers), 'True', 'ON'), 'OFF')}}
       CC: ${{parameters.CC}}
       CXX: ${{parameters.CXX}}
+      ${{if eq(parameters.graphics_api, '')}}:
+        graphicsApiDefine: ""
+      ${{else}}:
+        graphicsApiDefine: "-D GRAPHICS_API=${{parameters.graphics_api}}"
 
     steps:
       - template: cmake.yml
@@ -24,7 +29,7 @@ jobs:
 
       - script: |
           sudo apt-get update
-          sudo apt-get install libjavascriptcoregtk-4.1-dev libgl1-mesa-dev libcurl4-openssl-dev libwayland-dev clang
+          sudo apt-get install libjavascriptcoregtk-4.1-dev libgl1-mesa-dev libcurl4-openssl-dev libwayland-dev clang libvulkan-dev vulkan-validationlayers
         displayName: "Install packages"
 
       - script: |

.github/jobs/win32.yml

@@ -83,6 +83,22 @@ jobs:
           )
         displayName: "Disable JIT Debugger for Script"
 
+      # Install Lavapipe (CPU-based Vulkan software renderer) for Vulkan CI testing.
+      # Microsoft-hosted agents have no GPU, so a software Vulkan ICD is required.
+      - powershell: |
+          $ProgressPreference = 'SilentlyContinue'
+          $url = "https://github.com/jakoch/rasterizers/releases/download/20260302/lavapipe-win64-25.2.5.zip"
+          $zipPath = "$(Agent.TempDirectory)\lavapipe.zip"
+          $extractPath = "$(Agent.TempDirectory)\lavapipe"
+          Invoke-WebRequest -Uri $url -OutFile $zipPath
+          Expand-Archive -Path $zipPath -DestinationPath $extractPath -Force
+          $icdJson = Get-ChildItem -Path $extractPath -Filter "*.json" -Recurse | Select-Object -First 1
+          Write-Host "Lavapipe ICD: $($icdJson.FullName)"
+          Write-Host "##vso[task.setvariable variable=VK_ICD_FILENAMES]$($icdJson.FullName)"
+          Write-Host "##vso[task.setvariable variable=VK_DRIVER_FILES]$($icdJson.FullName)"
+        displayName: "Install Lavapipe (Vulkan software renderer)"
+        condition: eq('${{parameters.graphics_api}}', 'Vulkan')
+
       # Temporary disabling D3D12 validation tests. Changes in bgfx require changes in our D3D12 shader pipeline. This is been tracked by issue #1621
       - script: |
           cd build\${{variables.solutionName}}\Apps\Playground\RelWithDebInfo