test: add vulkan renderer scene coverage

tests/Rendering/integration/offscreen_scene/main.cpp

@@ -37,6 +37,7 @@ namespace {
 
 constexpr const char* kD3D12Screenshot = "offscreen_scene_d3d12.ppm";
 constexpr const char* kOpenGLScreenshot = "offscreen_scene_opengl.ppm";
+constexpr const char* kVulkanScreenshot = "offscreen_scene_vulkan.ppm";
 constexpr uint32_t kFrameWidth = 1280;
 constexpr uint32_t kFrameHeight = 720;
 
@@ -135,7 +136,15 @@ GameObject* CreateQuadObject(
 }
 
 const char* GetScreenshotFilename(RHIType backendType) {
-    return backendType == RHIType::D3D12 ? kD3D12Screenshot : kOpenGLScreenshot;
+    switch (backendType) {
+        case RHIType::D3D12:
+            return kD3D12Screenshot;
+        case RHIType::Vulkan:
+            return kVulkanScreenshot;
+        case RHIType::OpenGL:
+        default:
+            return kOpenGLScreenshot;
+    }
 }
 
 int GetComparisonThreshold(RHIType backendType) {
@@ -148,6 +157,7 @@ protected:
     void SetUp() override;
     void TearDown() override;
     void RenderFrame() override;
+    bool RequiresSwapChainAcquire() const override { return false; }
 
 private:
     void BuildScene();
@@ -486,6 +496,9 @@ TEST_P(OffscreenSceneTest, RenderOffscreenScene) {
 
 INSTANTIATE_TEST_SUITE_P(D3D12, OffscreenSceneTest, ::testing::Values(RHIType::D3D12));
 INSTANTIATE_TEST_SUITE_P(OpenGL, OffscreenSceneTest, ::testing::Values(RHIType::OpenGL));
+#if defined(XCENGINE_SUPPORT_VULKAN)
+INSTANTIATE_TEST_SUITE_P(Vulkan, OffscreenSceneTest, ::testing::Values(RHIType::Vulkan));
+#endif
 
 GTEST_API_ int main(int argc, char** argv) {
     Logger::Get().Initialize();