[dxgi] Synchronize presentation to enforce maximum frame latency

Some games may rely on the maximum number of frames in flight.
Might fix a related issue in Hard Reset (#503) and Okami HD (#283).

src/dxgi/dxgi_presenter.cpp

@@ -121,10 +121,14 @@ namespace dxvk {
   }
 
 
-  void DxgiVkPresenter::PresentImage(UINT SyncInterval) {
+  void DxgiVkPresenter::PresentImage(UINT SyncInterval, const Rc<DxvkEvent>& SyncEvent) {
     if (m_hud != nullptr)
       m_hud->update();
 
+    // Wait for frame event to be signaled. This is used
+    // to enforce the device's frame latency requirement.
+    SyncEvent->wait();
+
     // Check whether the back buffer size is the same
     // as the window size, in which case we should use
     // VK_FILTER_NEAREST to avoid blurry output
@@ -198,6 +202,13 @@ namespace dxvk {
       if (m_hud != nullptr)
         m_hud->render(m_context, m_options.preferredBufferSize);
 
+      if (i == SyncInterval - 1) {
+        DxvkEventRevision eventRev;
+        eventRev.event    = SyncEvent;
+        eventRev.revision = SyncEvent->reset();
+        m_context->signalEvent(eventRev);
+      }
+
       m_device->submitCommandList(
         m_context->endRecording(),
         swapSemas.acquireSync,

src/dxgi/dxgi_presenter.h

@@ -84,7 +84,7 @@ namespace dxvk {
      * \brief Renders back buffer to the screen
      * \param [in] SyncInterval Vsync interval
      */
-    void PresentImage(UINT SyncInterval);
+    void PresentImage(UINT SyncInterval, const Rc<DxvkEvent>& SyncEvent);
 
     /**
      * \brief Sets new back buffer

src/dxgi/dxgi_swapchain.cpp

@@ -307,7 +307,7 @@ namespace dxvk {
       // Submit pending rendering commands
       // before recording the present code.
       m_presentDevice->FlushRenderingCommands();
-      
+
       // Update swap chain properties. This will not only set
       // up vertical synchronization properly, but also apply
       // changes that were made to the window size even if the
@@ -317,7 +317,7 @@ namespace dxvk {
         : VK_PRESENT_MODE_FIFO_KHR;
 
       m_presenter->RecreateSwapchain(m_desc.Format, presentMode, GetWindowSize());
-      m_presenter->PresentImage(SyncInterval);
+      m_presenter->PresentImage(SyncInterval, m_device->GetFrameSyncEvent());
       return S_OK;
     } catch (const DxvkError& err) {
       Logger::err(err.message());