Doubtful, I don't see anything wrong in my quick glance. Don't forget to use timeEndPeriod(2) (or whatever the Begin's value was) to reset it.
Post your window processing code, might be a bug in there.
Win32 Game Loop For Fixed Frame Rate
When you get the WM_QUIT message you should not draw any more. Everything has shut down by that point. Actually, you probably should stop drawing after DestroyWindow is called (in the WM_CLOSE handler).
Author
Here's my message handler:
and my current game loop:
LRESULT CALLBACK Game::wndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){ switch (message) { case WM_DESTROY: PostQuitMessage(WM_QUIT); break; case WM_CLOSE: case WM_QUIT: Exit(); return 0; case WM_KEYDOWN: case WM_KEYUP: setKeyboardKeyState((int)wParam, (message == WM_KEYDOWN)); return 0; default: return DefWindowProc(hWnd, message, wParam, lParam); } return 0;}and my current game loop:
done = false; MSG msg; timeBeginPeriod(2); DWORD target = (DWORD)(1000 / targetFrameRate); while (!done) { DWORD startingPoint = timeGetTime(); while (PeekMessage(&msg, windowHandle, 0, 0, PM_REMOVE)) { TranslateMessage(&msg); DispatchMessage(&msg); } if (done) break; DWORD sleepLength = target - (timeGetTime() - startingPoint); Sleep((sleepLength > 0) ? sleepLength : 0); Update(1.0f / (float)targetFrameRate); Draw(); SwapBuffers(deviceContext); }
Another one fixed frame rate example (that I'm use in my programs):
int fix_fps = 30;float fFPS;int sleep = 0;static LARGE_INTEGER base;static LARGE_INTEGER freq;QueryPerformanceFrequency((LARGE_INTEGER*)&freq);QueryPerformanceCounter((LARGE_INTEGER*)&base); while (!done) { if (PeekMessage(&msg, windowHandle, 0, 0, PM_REMOVE)) { if (msg.message == WM_QUIT || msg.message == WM_DESTROY || msg.message == WM_CLOSE) { Exit(); break; } TranslateMessage(&msg); DispatchMessage(&msg); } static LARGE_INTEGER cur; QueryPerformanceCounter(&cur); // calculate fps if(cur.QuadPart>=base.QuadPart) { fFPS = (float)((double)freq.QuadPart/(double)(cur.QuadPart-base.QuadPart)); } else { fFPS = (float)((double)freq.QuadPart/(double)(base.QuadPart-cur.QuadPart)); }if(fix_fps > 0.0f) { if((int)fFPS < fix_fps ) sleep--; else if((int)fFPS > fix_fps ) sleep++; // sleep cant be negative if(sleep < 0) sleep = 0; // sleep Sleep(sleep); } Draw(); SwapBuffers(deviceContext); }
You treat WM_QUIT and WM_CLOSE as the same, they are not:
WM_CLOSE
Quit doesn't return at all.
As per PostQuitMessage() I just use 0. WM_QUIT isn't what you're ment to use ;-)
Hopefully that fixes it.
WM_CLOSE
Quit doesn't return at all.
As per PostQuitMessage() I just use 0. WM_QUIT isn't what you're ment to use ;-)
Hopefully that fixes it.
Also remove the HWND from the PeekMessage call. You won't get any thread messages by putting that handle in (WM_QUIT for example).
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