Validate synthetic SPIR-V in CI (#335)

.github/workflows/workflow.yml

@@ -159,6 +159,11 @@ jobs:
       NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
       PUBLISH_DIR: ${{ github.workspace }}/artifacts/publish/${{ matrix.rid }}
       RELEASE_DIR: ${{ github.workspace }}/artifacts/release
+      SPIRV_HEADERS_COMMIT: ad9184e76a66b1001c29db9b0a3e87f646c64de0
+      # SpirvModuleBuilder emits SPIR-V 1.5 and VulkanVideoPresenter requests Vulkan 1.2.
+      SPIRV_TARGET_ENV: vulkan1.2
+      SPIRV_TOOLS_COMMIT: 0539c81f69a3daeb706fd3477dca61435b475156
+      SPIRV_TOOLS_VERSION: v2026.2
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
@@ -183,6 +188,34 @@ jobs:
       - name: Run tests
         run: dotnet test SharpEmu.slnx -c Release --no-build --verbosity normal
 
+      - name: Build pinned SPIRV-Tools
+        if: matrix.rid == 'linux-x64'
+        run: |
+          git clone --no-checkout --filter=blob:none https://github.com/KhronosGroup/SPIRV-Tools.git "$RUNNER_TEMP/spirv-tools"
+          git -C "$RUNNER_TEMP/spirv-tools" checkout --detach "$SPIRV_TOOLS_COMMIT"
+          test "$(git -C "$RUNNER_TEMP/spirv-tools" rev-parse HEAD)" = "$SPIRV_TOOLS_COMMIT"
+
+          git clone --no-checkout --filter=blob:none https://github.com/KhronosGroup/SPIRV-Headers.git "$RUNNER_TEMP/spirv-tools/external/spirv-headers"
+          git -C "$RUNNER_TEMP/spirv-tools/external/spirv-headers" checkout --detach "$SPIRV_HEADERS_COMMIT"
+          test "$(git -C "$RUNNER_TEMP/spirv-tools/external/spirv-headers" rev-parse HEAD)" = "$SPIRV_HEADERS_COMMIT"
+
+          cmake -S "$RUNNER_TEMP/spirv-tools" -B "$RUNNER_TEMP/spirv-tools-build" \
+            -G Ninja \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DSPIRV_SKIP_TESTS=ON \
+            -DSPIRV_WERROR=OFF
+          cmake --build "$RUNNER_TEMP/spirv-tools-build" --target spirv-val
+
+      - name: Generate and validate synthetic SPIR-V
+        if: matrix.rid == 'linux-x64'
+        run: |
+          dotnet run --project tools/SharpEmu.Tools.ShaderDump/SharpEmu.Tools.ShaderDump.csproj -c Release -- artifacts/shader-dump
+          scripts/validate-synthetic-spirv.sh \
+            "$RUNNER_TEMP/spirv-tools-build/tools/spirv-val" \
+            "$SPIRV_TOOLS_VERSION" \
+            "$SPIRV_TARGET_ENV" \
+            artifacts/shader-dump
+
       - name: Publish ${{ matrix.rid }} CLI
         run: dotnet publish src/SharpEmu.CLI/SharpEmu.CLI.csproj -c Release -r ${{ matrix.rid }} --self-contained true --no-restore -p:PublishDir="$PUBLISH_DIR"
 

scripts/validate-synthetic-spirv.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+# Copyright (C) 2026 SharpEmu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set -euo pipefail
+
+if [ "$#" -ne 4 ]; then
+  echo "usage: $0 <spirv-val> <expected-version> <target-env> <module-directory>" >&2
+  exit 2
+fi
+
+validator=$1
+expected_version=$2
+target_env=$3
+module_directory=$4
+
+if [ ! -x "$validator" ]; then
+  echo "SPIR-V validator is not executable: $validator" >&2
+  exit 2
+fi
+
+if [ ! -d "$module_directory" ]; then
+  echo "SPIR-V module directory does not exist: $module_directory" >&2
+  exit 2
+fi
+
+validator_version="$("$validator" --version | head -n 1)"
+if [[ "$validator_version" != *"SPIRV-Tools $expected_version"* ]]; then
+  echo "unexpected SPIRV-Tools version: $validator_version (expected $expected_version)" >&2
+  exit 2
+fi
+
+echo "Validator: $validator_version"
+echo "Target environment: $target_env"
+
+mapfile -d '' modules < <(find "$module_directory" -type f -name '*.spv' -print0 | sort -z)
+if [ "${#modules[@]}" -eq 0 ]; then
+  echo "no SPIR-V modules found in $module_directory" >&2
+  exit 1
+fi
+
+failures=0
+for module in "${modules[@]}"; do
+  echo "Validating module: $module"
+  if ! "$validator" --target-env "$target_env" "$module"; then
+    echo "SPIR-V validation failed: $module" >&2
+    failures=1
+  fi
+done
+
+if [ "$failures" -ne 0 ]; then
+  exit 1
+fi
+
+echo "Validated ${#modules[@]} synthetic SPIR-V modules."