AI 修复横竖屏的问题

vulkan/Application.h

@@ -90,7 +90,19 @@ public:
 
     // Rebuild the window-dependent Vulkan objects torn down above.
     // Safe to call only after cleanupForWindowLost().
-    void reinitForNewWindow();
+    // Returns true when the new swapchain's extent or format differs from the
+    // one in use before cleanupForWindowLost(). When true, any pipeline baked
+    // with a static viewport/scissor from swapChainExtent -- including the
+    // FaceApp pipelines -- must be destroyed and recreated against the new
+    // renderPass / extent. Application's own renderPass + graphicsPipeline are
+    // already handled internally.
+    bool reinitForNewWindow();
+
+    // Extent / format captured by the most recent cleanupForWindowLost().
+    // Used by reinitForNewWindow() to decide whether renderPass / pipelines
+    // must be rebuilt against the new swapchain.
+    VkExtent2D _prevSwapChainExtent = {0, 0};
+    VkFormat   _prevSwapChainImageFormat = VK_FORMAT_UNDEFINED;
 
 protected:
     void loadTexture(std::string path, Texture& tex, bool srgb, VkCommandPool pool);