(CI) use xvfb

.github/workflows/dart.yml

@@ -21,18 +21,30 @@ jobs:
           echo "LD_LIBRARY_PATH=${{ github.workspace }}/llvm/lib/x86_64-unknown-linux-gnu/" >> $GITHUB_ENV
       - name: Verify installation
         run: clang --version
-      - name: Install Vulkan SDK and dependencies
+      - name: Install MESA
         run: |
-          wget -qO - https://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo apt-key add -
-          sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-jammy.list https://packages.lunarg.com/vulkan/lunarg-vulkan-jammy.list
           sudo apt-get update
-          sudo apt-get install -y vulkan-sdk
+          sudo apt-get install -y xvfb
+          sudo apt-get install -y libosmesa6-dev
+          #sudo apt-get -y build-dep mesa
+          #git clone https://gitlab.freedesktop.org/mesa/mesa.git
+          #cd mesa
+          #git checkout mesa-23.2.1
+          #mkdir -p out
+          #meson setup builddir/ -Dprefix="$(pwd)/out" -Dosmesa=true -Dglx=xlib -Dgallium-drivers=swrast -Dvulkan-drivers=swrast
+          #meson install -C builddir/
+      #- name: Install Vulkan SDK and dependencies
+      #  run: |
+      #    wget -qO - https://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo apt-key add -
+      #    sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-jammy.list https://packages.lunarg.com/vulkan/lunarg-vulkan-jammy.list
+      #    sudo apt-get update
+      #    sudo apt-get install -y vulkan-sdk
       - name: Set up Flutter
         uses: subosito/flutter-action@v2
         with:
           channel: master
           architecture: X64
-      - run: cd thermion_dart && dart pub get && dart --enable-experiment=native-assets test test/asset_tests.dart 
+      - run: cd thermion_dart && dart pub get && xvfb-run dart --enable-experiment=native-assets test test/asset_tests.dart 
       - name: Zip goldens
         run: zip -r goldens.zip ./thermion_dart/test/output
       - name: Upload golden images