From 42c562afbca5ff13bfcd3c56e893894a2b1ff006 Mon Sep 17 00:00:00 2001
From: spycrab <spycrab@users.noreply.github.com>
Date: Sat, 20 Jan 2018 21:00:28 +0100
Subject: [PATCH] Qt: Fix render window resize bug

---
 Source/Core/DolphinQt2/Host.cpp         | 11 ++++++++++-
 Source/Core/DolphinQt2/Host.h           |  1 +
 Source/Core/DolphinQt2/RenderWidget.cpp |  5 +++++
 Source/Core/DolphinQt2/RenderWidget.h   |  1 +
 4 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/Source/Core/DolphinQt2/Host.cpp b/Source/Core/DolphinQt2/Host.cpp
index c39207b252..e053cd91fa 100644
--- a/Source/Core/DolphinQt2/Host.cpp
+++ b/Source/Core/DolphinQt2/Host.cpp
@@ -2,12 +2,15 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include "DolphinQt2/Host.h"
+
 #include <QAbstractEventDispatcher>
 #include <QApplication>
 
 #include "Common/Common.h"
+#include "Core/ConfigManager.h"
 #include "Core/Host.h"
-#include "DolphinQt2/Host.h"
+#include "VideoCommon/RenderBase.h"
 
 Host::Host() = default;
 
@@ -47,6 +50,12 @@ void Host::SetRenderFullscreen(bool fullscreen)
   m_render_fullscreen = fullscreen;
 }
 
+void Host::UpdateSurface()
+{
+  if (g_renderer)
+    g_renderer->ChangeSurface(GetRenderHandle());
+}
+
 void Host_Message(int id)
 {
   if (id == WM_USER_STOP)
diff --git a/Source/Core/DolphinQt2/Host.h b/Source/Core/DolphinQt2/Host.h
index 203c81e022..0b998722d2 100644
--- a/Source/Core/DolphinQt2/Host.h
+++ b/Source/Core/DolphinQt2/Host.h
@@ -26,6 +26,7 @@ public:
   void SetRenderHandle(void* handle);
   void SetRenderFocus(bool focus);
   void SetRenderFullscreen(bool fullscreen);
+  void UpdateSurface();
 
 signals:
   void RequestTitle(const QString& title);
diff --git a/Source/Core/DolphinQt2/RenderWidget.cpp b/Source/Core/DolphinQt2/RenderWidget.cpp
index f8b744b3d4..bbeace4e2a 100644
--- a/Source/Core/DolphinQt2/RenderWidget.cpp
+++ b/Source/Core/DolphinQt2/RenderWidget.cpp
@@ -22,6 +22,8 @@ RenderWidget::RenderWidget(QWidget* parent) : QWidget(parent)
           Qt::DirectConnection);
   connect(this, &RenderWidget::HandleChanged, Host::GetInstance(), &Host::SetRenderHandle,
           Qt::DirectConnection);
+  connect(this, &RenderWidget::SizeChanged, Host::GetInstance(), &Host::UpdateSurface,
+          Qt::DirectConnection);
 
   emit HandleChanged((void*)winId());
 
@@ -75,6 +77,9 @@ bool RenderWidget::event(QEvent* event)
   case QEvent::WindowDeactivate:
     Host::GetInstance()->SetRenderFocus(false);
     break;
+  case QEvent::Resize:
+    emit SizeChanged();
+    break;
   case QEvent::WindowStateChange:
     emit StateChanged(isFullScreen());
     break;
diff --git a/Source/Core/DolphinQt2/RenderWidget.h b/Source/Core/DolphinQt2/RenderWidget.h
index dd5c17b95d..478ac8cda3 100644
--- a/Source/Core/DolphinQt2/RenderWidget.h
+++ b/Source/Core/DolphinQt2/RenderWidget.h
@@ -23,6 +23,7 @@ signals:
   void Closed();
   void HandleChanged(void* handle);
   void StateChanged(bool fullscreen);
+  void SizeChanged();
 
 private:
   void HandleCursorTimer();