Recreate swapchain if window is resized

src/video_core/renderer_vulkan/renderer_vulkan.cpp

@@ -262,6 +262,12 @@ Frame* RendererVulkan::PrepareFrameInternal(VideoCore::Image& image, bool is_eop
 }
 
 void RendererVulkan::Present(Frame* frame) {
+    // Recreate the swapchain if the window was resized.
+    if (window.getWidth() != swapchain.GetExtent().width ||
+        window.getHeight() != swapchain.GetExtent().height) {
+        swapchain.Recreate(window.getWidth(), window.getHeight());
+    }
+    
     ImGui::Core::NewFrame();
 
     swapchain.AcquireNextImage();

src/video_core/renderer_vulkan/vk_swapchain.cpp

@@ -81,6 +81,10 @@ void Swapchain::Create(u32 width_, u32 height_, vk::SurfaceKHR surface_) {
     RefreshSemaphores();
 }
 
+void Swapchain::Recreate(u32 width_, u32 height_) {
+    Create(width_, height_, surface);
+}
+
 bool Swapchain::AcquireNextImage() {
     vk::Device device = instance.GetDevice();
     vk::Result result =

src/video_core/renderer_vulkan/vk_swapchain.h

@@ -25,6 +25,9 @@ public:
     /// Creates (or recreates) the swapchain with a given size.
     void Create(u32 width, u32 height, vk::SurfaceKHR surface);
 
+    /// Recreates the swapchain with a given size and current surface.
+    void Recreate(u32 width, u32 height);
+
     /// Acquires the next image in the swapchain.
     bool AcquireNextImage();