qt: Fix fullscreen and resize issues on macOS. (#47)

* qt: Fix bugged macOS full screen transition.

* renderer/vulkan: Fix swapchain recreation destroying in-use semaphore.

src/citra_qt/bootmanager.cpp

@@ -229,20 +229,10 @@ class RenderWidget : public QWidget {
 public:
     RenderWidget(GRenderWindow* parent) : QWidget(parent) {
         setMouseTracking(true);
-    }
-
-    virtual ~RenderWidget() = default;
-
-    virtual void Present() {}
-
-    void paintEvent(QPaintEvent* event) override {
-        Present();
         update();
     }
 
-    std::pair<unsigned, unsigned> GetSize() const {
-        return std::make_pair(width(), height());
-    }
+    virtual ~RenderWidget() = default;
 };
 
 #ifdef HAS_OPENGL
@@ -262,7 +252,7 @@ public:
         context = std::move(context_);
     }
 
-    void Present() override {
+    void Present() {
         if (!isVisible()) {
             return;
         }
@@ -278,6 +268,11 @@ public:
         glFinish();
     }
 
+    void paintEvent(QPaintEvent* event) override {
+        Present();
+        update();
+    }
+
     QPaintEngine* paintEngine() const override {
         return nullptr;
     }
@@ -309,7 +304,7 @@ struct SoftwareRenderWidget : public RenderWidget {
     explicit SoftwareRenderWidget(GRenderWindow* parent, Core::System& system_)
         : RenderWidget(parent), system(system_) {}
 
-    void Present() override {
+    void Present() {
         if (!isVisible()) {
             return;
         }
@@ -339,6 +334,11 @@ struct SoftwareRenderWidget : public RenderWidget {
         painter.end();
     }
 
+    void paintEvent(QPaintEvent* event) override {
+        Present();
+        update();
+    }
+
     QImage LoadFramebuffer(VideoCore::ScreenId screen_id) {
         const auto& renderer = static_cast<SwRenderer::RendererSoftware&>(system.Renderer());
         const auto& info = renderer.Screen(screen_id);

src/video_core/renderer_vulkan/vk_present_window.cpp

@@ -330,7 +330,11 @@ void PresentWindow::NotifySurfaceChanged() {
 }
 
 void PresentWindow::CopyToSwapchain(Frame* frame) {
-    const auto recreate_swapchain = [&] { swapchain.Create(frame->width, frame->height, surface); };
+    const auto recreate_swapchain = [&] {
+        std::scoped_lock submit_lock{scheduler.submit_mutex};
+        graphics_queue.waitIdle();
+        swapchain.Create(frame->width, frame->height, surface);
+    };
 
 #ifdef ANDROID
     std::unique_lock lock{recreate_surface_mutex};