Graphics

// Back buffer to front.
glReadBuffer(GL_BACK); 
glDrawBuffer(GL_FRONT); 
glCopyPixels(GL_COLOR);

// Front buffer to back.
glReadBuffer(GL_FRONT); 
glDrawBuffer(GL_BACK); 
glCopyPixels(GL_COLOR);

bool quit = false;
while(!quit) {
    PeekMessage(&msg, hwnd, NULL, NULL, PM_REMOVE);
    if (msg.message == WM_QUIT) {
        quit = true;

    } else {
        DoRendering();
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
}

Mark Churchill wrote:

keep in mind the GDI+ Matrix object is marked IDisposable

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, 
   WPARAM wParam, LPARAM lParam){
   PAINTSTRUCT  ps;
   HDC		hdc;

   switch(message){
   case WM_PAINT:
	 hdc = BeginPaint(hWnd, &ps);
	 Prikaz(hdc);
      return 0;
   case WM_DESTROY:
      PostQuitMessage(0);
	  SnimiBitmap();
      return 0;
   default:
      return DefWindowProc(hWnd, message, wParam, lParam);
   }
}

void Prikaz(HDC hdc){
    Graphics graphics(hdc);
    Render();
    Bitmap FrameBuffer((BITMAPINFO*) &((*BMPSlika).InfoHeader), (*BMPSlika).PixelData);
    graphics.DrawImage(&FrameBuffer,0,0);
}

Mark Salsbery
Microsoft MVP - Visual C++

Mark Salsbery wrote:

You mentioned something about a loop in your first post - where is this loop and
what is it (supposed to be) doing?

Mark Salsbery wrote:

WM_PAINT is posted to your window's message queue by the system. The parameters are
not in your control, nor are they wrong, nor should you be trying to send/post a WM_PAINT
message yourself.

Mark Salsbery wrote:

Window rendering has been the same since the beginning of Windows....the problem is in YOUR code,
not some problem in MFC (which you're not using apparently), .NET (which you're not using apparently),
or the system.

Mark Salsbery wrote:

This code has nothing to do with WM_PAINT or Invalidatexxxx() functions. The bitmap will be rendered
immediately if the HDC and the Bitmap are valid.

Mark Salsbery wrote:

According to your comments, your WM_PAINT handling code is working fine, so where else are
you calling this from and how are you obtaining the HDC?

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, 
   WPARAM wParam, LPARAM lParam){
   PAINTSTRUCT  ps;
   HDC			hdc;
   switch(message){
   case WM_PAINT:
	 hdc = BeginPaint(hWnd, &ps);	 
	 Prikaz(hdc, hWnd);
      return 0;
   case WM_DESTROY:
      PostQuitMessage(0);
	  SnimiBitmap();
      return 0;
   default:
      return DefWindowProc(hWnd, message, wParam, lParam);
   }