Merge pull request #1387 from colobot/dev-fix-vsync

Remove vsync loop and improve vsync UI

src/app/app.cpp

@@ -549,6 +549,8 @@ bool CApplication::Create()
 
     /* SDL initialization sequence */
 
+    // Creating the m_engine now because it holds the vsync flag
+    m_engine = MakeUnique<Gfx::CEngine>(this, m_systemUtils);
 
     Uint32 initFlags = SDL_INIT_VIDEO | SDL_INIT_TIMER;
 
@@ -693,8 +695,6 @@ bool CApplication::Create()
     }
 
     // Create the 3D engine
-    m_engine = MakeUnique<Gfx::CEngine>(this, m_systemUtils);
-
     m_engine->SetDevice(m_device.get());
 
     if (! m_engine->Create() )
@@ -850,24 +850,9 @@ bool CApplication::CreateVideoSurface()
     int vsync = 0;
     if (GetConfigFile().GetIntProperty("Setup", "VSync", vsync))
     {
-        while (SDL_GL_SetSwapInterval(vsync) == -1)
-        {
-            switch(vsync)
-            {
-                case -1: //failed with adaptive sync?
-                    GetLogger()->Warn("Adaptive sync not supported.\n");
-                    vsync = 1;
-                    break;
-                case 1: //failed with VSync enabled?
-                    GetLogger()->Warn("Couldn't enable VSync.\n");
-                    vsync = 0;
-                    break;
-                case 0: //failed with VSync disabled?
-                    GetLogger()->Warn("Couldn't disable VSync.\n");
-                    vsync = 1;
-                    break;
-            }
-        }
+        m_engine->SetVSync(vsync);
+        TryToSetVSync();
+        vsync = m_engine->GetVSync();
         GetConfigFile().SetIntProperty("Setup", "VSync", vsync);
 
         GetLogger()->Info("Using Vsync: %s\n", (vsync == -1 ? "adaptive" : (vsync ? "true" : "false")));
@@ -876,6 +861,32 @@ bool CApplication::CreateVideoSurface()
     return true;
 }
 
+void CApplication::TryToSetVSync()
+{
+    int vsync = m_engine->GetVSync();
+    int result = SDL_GL_SetSwapInterval(vsync);
+    if (result == -1)
+    {
+        switch (vsync)
+        {
+        case -1:
+            GetLogger()->Warn("Adaptive sync not supported: %s\n", SDL_GetError());
+            m_engine->SetVSync(1);
+            TryToSetVSync();
+            break;
+        case 1:
+            GetLogger()->Warn("Couldn't enable VSync: %s\n", SDL_GetError());
+            m_engine->SetVSync(0);
+            TryToSetVSync();
+            break;
+        case 0:
+            GetLogger()->Warn("Couldn't disable VSync: %s\n", SDL_GetError());
+            m_engine->SetVSync(SDL_GL_GetSwapInterval());
+            break;
+        }
+    }
+}
+
 bool CApplication::ChangeVideoConfig(const Gfx::DeviceConfig &newConfig)
 {
     m_deviceConfig = newConfig;
@@ -884,26 +895,7 @@ bool CApplication::ChangeVideoConfig(const Gfx::DeviceConfig &newConfig)
     SDL_SetWindowSize(m_private->window, m_deviceConfig.size.x, m_deviceConfig.size.y);
     SDL_SetWindowFullscreen(m_private->window, m_deviceConfig.fullScreen ? SDL_WINDOW_FULLSCREEN : 0);
 
-    int vsync = m_engine->GetVSync();
-    while (SDL_GL_SetSwapInterval(vsync) == -1)
-    {
-        switch(vsync)
-        {
-            case -1: //failed with adaptive sync?
-                GetLogger()->Warn("Adaptive sync not supported.\n");
-                vsync = 1;
-                break;
-            case 1: //failed with VSync enabled?
-                GetLogger()->Warn("Couldn't enable VSync.\n");
-                vsync = 0;
-                break;
-            case 0: //failed with VSync disabled?
-                GetLogger()->Warn("Couldn't disable VSync.\n");
-                vsync = 1;
-                break;
-        }
-    }
-    m_engine->SetVSync(vsync);
+    TryToSetVSync();
 
     m_device->ConfigChanged(m_deviceConfig);
 

src/app/app.h

@@ -288,6 +288,9 @@ public:
 protected:
     //! Creates the window's SDL_Surface
     bool CreateVideoSurface();
+    //! Tries to set the SDL vsync state desired by the 3D engine
+    //! The final state of SDL vsync is set in the 3D engine afterwards
+    void TryToSetVSync();
 
     //! Processes the captured SDL event to Event struct
     Event       ProcessSystemEvent();

src/ui/screen/screen_setup_display.cpp

@@ -293,6 +293,7 @@ void CScreenSetupDisplay::UpdateApply()
     CWindow*    pw;
     CButton*    pb;
     CList*      pl;
+    CList*      pvl;
     CCheck*     pc;
     int         sel2;
     bool        bFull;
@@ -309,6 +310,22 @@ void CScreenSetupDisplay::UpdateApply()
     pc = static_cast<CCheck*>(pw->SearchControl(EVENT_INTERFACE_FULL));
     bFull = pc->TestState(STATE_CHECK);
 
+    pvl = static_cast<CList*>(pw->SearchControl(EVENT_INTERFACE_VSYNC));
+    if (pvl == nullptr)  return;
+
+    switch (m_engine->GetVSync())
+    {
+    case -1: //Adaptive?
+        pvl->SetSelect(1);
+        break;
+    case 0: //Off?
+        pvl->SetSelect(0);
+        break;
+    case 1: //On?
+        pvl->SetSelect(2);
+        break;
+    }
+
     if ( sel2 == m_setupSelMode   &&
          bFull == m_setupFull     )
     {