ci: run the Wayland frame-insets suite under headless weston

.github/workflows/ci.yaml

@@ -123,6 +123,61 @@ jobs:
           zig build test-fizzy --summary all -- --require-gpu vulkan
           kill "$weston_pid"
 
+  # fizzyedit/SDL's suite for patch 6, Wayland frame insets (`FizzyWayland`). It reads the requests
+  # SDL sends from libwayland's own trace (WAYLAND_DEBUG), so it needs a real compositor: weston's
+  # headless backend, with its default desktop shell, which maximizes and fullscreens. At output
+  # scale 1 and 2, as the insets are in window coordinates whatever the scale. lavapipe presents
+  # the frames that map the windows. Ubuntu 26.04 for the same libxkbcommon reason as above.
+  test-fizzy-wayland-insets:
+    strategy:
+      fail-fast: false
+      matrix:
+        scale: [1, 2]
+    runs-on: ubuntu-latest
+    container: ubuntu:26.04
+    steps:
+      - name: Install tools, lavapipe and weston
+        run: |
+          apt-get update
+          DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+            ca-certificates git xz-utils \
+            mesa-vulkan-drivers libvulkan1 weston \
+            libwayland-client0 libwayland-cursor0 libwayland-egl1 libxkbcommon0
+          dpkg-query -W libwayland-client0 mesa-vulkan-drivers weston
+          echo "VK_DRIVER_FILES=$(ls /usr/share/vulkan/icd.d/lvp_icd*.json | head -n 1)" >> "$GITHUB_ENV"
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Zig
+        uses: mlugg/setup-zig@v2
+        with:
+          version: 0.16.0
+
+      - name: Workaround Zig 0.16.0 ZIP unpack failure
+        # https://codeberg.org/ziglang/zig/issues/31964
+        run: mkdir -p "${ZIG_GLOBAL_CACHE_DIR}/tmp"
+
+      - name: Build test-fizzy
+        run: zig build test-fizzy --summary all -- --list
+
+      - name: Run FizzyWayland under headless weston (scale ${{ matrix.scale }})
+        env:
+          SDL_VIDEO_DRIVER: wayland
+          WAYLAND_DISPLAY: wayland-fizzy
+        run: |
+          export XDG_RUNTIME_DIR="$(mktemp -d)"
+          chmod 700 "$XDG_RUNTIME_DIR"
+          weston --backend=headless --scale=${{ matrix.scale }} --socket="$WAYLAND_DISPLAY" --idle-time=0 > weston.log 2>&1 &
+          weston_pid=$!
+          for i in $(seq 50); do [ -S "$XDG_RUNTIME_DIR/$WAYLAND_DISPLAY" ] && break; sleep 0.1; done
+          status=0
+          zig build test-fizzy --summary all -- --filter FizzyWayland || status=$?
+          kill "$weston_pid" || true
+          echo "--- weston.log"
+          cat weston.log
+          exit "$status"
+
   # Do GitHub's hosted macOS runners have a Metal device? The probe says, and the suite requires
   # Metal wherever the probe found one, so a runner with Metal can't skip the Metal tests. (On
   # macos-14, MTLCreateSystemDefaultDevice() is nil from a command-line tool though

build.zig

@@ -235,4 +235,5 @@ const fizzy_test_sources = [_][]const u8{
     "testfizzy.c",
     "testautomation_fizzy_gpu.c",
     "testautomation_fizzy_xkb.c",
+    "testautomation_fizzy_wayland.c",
 };

build.zig.zon

@@ -5,14 +5,13 @@
     .minimum_zig_version = "0.16.0",
     .dependencies = .{
         // fizzyedit/SDL: release-3.4.16 with fizzy's patches on top. TEST PIN: branch
-        // `wayland/xkb-mod-mask-optional`, `fizzy-3.4` (tag `fizzy-3.4.16-6`) plus the suite for
-        // the Wayland driver on an older libxkbcommon and patch 8 making `xkb_keymap_mod_get_mask`
-        // optional at runtime, untagged until it is reviewed and moved onto `fizzy-3.4`. Pinned by
-        // commit. `.version` is still the SDL release it is based on: `build.zig` reads it for
-        // the library's SO version.
+        // `test/fizzy-wayland-insets`, `fizzy-3.4` (tag `fizzy-3.4.16-7`) plus the test suite for
+        // patch 6, untagged until it is reviewed and moved onto `fizzy-3.4`. Pinned by commit.
+        // `.version` is still the SDL release it is based on: `build.zig` reads it for the
+        // library's SO version.
         .sdl = .{
-            .url = "https://github.com/fizzyedit/SDL/archive/36dda37b20cb70ce0feb79ba1340858e9cd41ac5.tar.gz",
-            .hash = "N-V-__8AANe4-AK4xmMHFWdXiPun3hihTxQJCHKC4gmCsDEQ",
+            .url = "https://github.com/fizzyedit/SDL/archive/a518aaf9e3b915330c5ae80771efbbca5523d29e.tar.gz",
+            .hash = "N-V-__8AAMhY-QJGBfy_DcJQIubyngZlFT5ebaIR5IU4MxCS",
             .version = "3.4.16",
         },
         .dbus = .{