Quote:Original post by Black Knight
Is vsync enabled?Try forcing it off in fullscreen mode and see if it makes a difference.

Quote:Original post by V-man
This is just a guess but make sure you have PFD_SWAP_EXCHANGE if you are on Windows. You haven't given much info and haven't shown any code or anything so it would be difficult to say where the problem is.

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)	WNDCLASSEX windowClass;			HWND	   hwnd;				MSG	    msg;					bool	   done;				DWORD	   dwExstyle;							DWORD	   dwstyle;							RECT	   windowRect;	int width = 1280; //800 1280	int height = 1024; //600 1024	int bits = 32;	fullScreen = true;	windowRect.left=(long)0;							windowRect.right=(long)width;						windowRect.top=(long)0;							windowRect.bottom=(long)height;						windowClass.cbSize			= sizeof(WNDCLASSEX);	windowClass.style			= CS_HREDRAW | CS_VREDRAW;	windowClass.lpfnWndProc		= WndProc;	windowClass.cbClsExtra		= 0;	windowClass.cbWndExtra		= 0;	windowClass.hInstance		= hInstance;	windowClass.hIcon			= LoadIcon(NULL, IDI_APPLICATION);		windowClass.hCursor			= LoadCursor(NULL, IDC_ARROW);			windowClass.hbrBackground	= NULL;									windowClass.lpszMenuName	= NULL;									windowClass.lpszClassName	= "MojaKlasa";	windowClass.hIconSm			= LoadIcon(NULL, IDI_WINLOGO);			if (!RegisterClassEx(&windowClass))		return 0;	if (fullScreen)									{		       DEVMODE screenSettings;    memset(&screenSettings,0,sizeof(screenSettings));    screenSettings.dmSize       = sizeof(DEVMODE);	    screenSettings.dmPelsWidth  = width;			    screenSettings.dmPelsHeight = height;			    screenSettings.dmBitsPerPel = bits;				    screenSettings.dmFields     = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;    if (ChangeDisplaySettings(&screenSettings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL)    {      if (MessageBox(NULL, "Przelaczenie do wybranego trybu graficznego nie jest możliwe\n"                           "Czy przejsc do tryby okinkowego?",                           "Programowanie gier w OpenGL",                           MB_YESNO | MB_ICONEXCLAMATION) == IDYES)      {        fullScreen = true;	      }      else			{				return FALSE;			}    }  }	if (fullScreen)	{		dwExstyle = WS_EX_APPWINDOW;		dwstyle = WS_POPUP;	// okno bez ramki i paska tytułu		ShowCursor(FALSE);            // ukrywa kursor	}	else	{		dwExstyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;		dwstyle = WS_OVERLAPPEDWINDOW;	}  AdjustWindowRectEx(&windowRect, dwstyle, FALSE, dwExstyle);	// tworzy okno	hwnd = CreateWindowEx(NULL,															  "MojaKlasa",									  ":-------------o",								  dwstyle | WS_CLIPCHILDREN |						  WS_CLIPSIBLINGS,						  0, 0,						x,y						  windowRect.right - windowRect.left,						  windowRect.bottom - windowRect.top, 						  NULL,															  NULL,															  hInstance,													  NULL);										if (!hwnd)		return 0;	ShowWindow(hwnd, SW_SHOW);				UpdateWindow(hwnd);						done = false;							Initialize();							while (!done)	{		PeekMessage(&msg, hwnd, NULL, NULL, PM_REMOVE);		if (msg.message == WM_QUIT || koniec == TRUE)				{			done = true;						}		else		{			////fps////			// obliczamy czas generowania ostatniej klatki			 fNewTime = GetSecs();			 dt = fNewTime - fTime;			 fTime = fNewTime;			  			/////////////				Render();				TranslateMessage(&msg);						DispatchMessage(&msg);				++uFrames;			  fFPSTime += dt;			  if (fFPSTime>= 1.0f)   				 {			   			  fFPS = uFrames / fFPSTime;			  uFrames = 0;			  fFPSTime = 0.0f;				}		}	if (fullScreen)	{		ChangeDisplaySettings(NULL,0);					// If So Switch Back To The Desktop		ShowCursor(TRUE);						// Show Mouse Pointer	}	}	return msg.wParam;}

void SetupPixelFormat(HDC hDC){	int nPixelFormat;						static PIXELFORMATDESCRIPTOR pfd = {		sizeof(PIXELFORMATDESCRIPTOR),			1,										PFD_DRAW_TO_WINDOW |					PFD_SUPPORT_OPENGL |					PFD_DOUBLEBUFFER,						PFD_TYPE_RGBA,							32,										0, 0, 0, 0, 0, 0,						0,										0,										0,										0, 0, 0, 0,						 		16,										0,										0,										PFD_MAIN_PLANE,							0,										0, 0, 0 };						nPixelFormat = ChoosePixelFormat(hDC, &pfd);		SetPixelFormat(hDC, nPixelFormat, &pfd);		}

while(!done){  while(PeekMessage(&msg, hwnd, NULL, NULL, PM_REMOVE))  {    if(msg.message == WM_QUIT)    {      done = true;    }    TranslateMessage(&msg);    DispatchMessage(&msg);  }  Render();}

Quote:Original post by subi211
It may be the copypaste into the forum, but that looks like you're calling ChangeDisplaySettings(NULL,0) every iteration of your while if fullscreen is true. Should that if(fullscreen) be after the while rather than in it?

Oh, and I wouldn't TranslateMessage and DispatchMessage unless the return value from PeekMessage is nonzero. I think you're repeat sending stuff.

You're probably better off with something like:

while(!done){  while(PeekMessage(&msg, hwnd, NULL, NULL, PM_REMOVE))  {    if(msg.message == WM_QUIT)    {      done = true;    }    TranslateMessage(&msg);    DispatchMessage(&msg);  }  Render();}