actual non hacky way to share OpenGL contexts

src/frontend/qt_sdl/Screen.cpp

@@ -681,23 +681,23 @@ ScreenPanelGL::ScreenPanelGL(QWidget* parent) : ScreenPanel(parent)
 ScreenPanelGL::~ScreenPanelGL()
 {}
 
-GL::Context* hax = nullptr;
-
 bool ScreenPanelGL::createContext()
 {
     std::optional<WindowInfo> windowInfo = getWindowInfo();
 
-    if (hax)
+    // if our parent window is parented to another window, we will
+    // share our OpenGL context with that window
+    MainWindow* parentwin = (MainWindow*)parentWidget()->parentWidget();
+    if (parentwin)
     {
         if (windowInfo.has_value())
         {
-            glContext = hax->CreateSharedContext(*getWindowInfo());
+            glContext = parentwin->getOGLContext()->CreateSharedContext(*getWindowInfo());
             glContext->DoneCurrent();
         }
-
-        return glContext != nullptr;
     }
-
+    else
+    {
         std::array<GL::Context::Version, 2> versionsToTry = {
                 GL::Context::Version{GL::Context::Profile::Core, 4, 3},
                 GL::Context::Version{GL::Context::Profile::Core, 3, 2}};
@@ -705,7 +705,7 @@ bool ScreenPanelGL::createContext()
         {
             glContext = GL::Context::Create(*getWindowInfo(), versionsToTry);
             glContext->DoneCurrent();
-        hax = glContext.get();
+        }
     }
 
     return glContext != nullptr;

src/frontend/qt_sdl/main.cpp

@@ -380,7 +380,7 @@ int main(int argc, char** argv)
     if (options->fullscreen)
         ToggleFullscreen(mainWindow);
 
-    MainWindow* poop = new MainWindow();
+    MainWindow* poop = new MainWindow(mainWindow);
 
     emuThread = new EmuThread();
     emuThread->attachWindow(mainWindow);