ChangeDisplaySettings schlägt fehl

[Ein ehemaliger Benutzer]

Folgender Code:

bool NLWindowWin32::createWindow( const NLWindowSettings& settings )
{
    m_settings = settings;
    WNDCLASSEX wc;
    memset(&wc, 0, sizeof(wc));
    m_dwStyle = WS_BORDER | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX;

    // Different Style for Fullscreen
    if ( m_settings.fullscreen )
    {
        m_dwStyle = WS_POPUP;
    }
    if ( m_settings.resizable && !m_settings.fullscreen )
    {
        m_dwStyle = WS_OVERLAPPEDWINDOW;
    }

    // Fill WindowClass Structure with needed options
    wc.cbSize        = sizeof(WNDCLASSEX);
    wc.style         = CS_OWNDC|CS_HREDRAW|CS_VREDRAW;
    wc.lpfnWndProc   = (WNDPROC)NLWindowWin32::sWinProc;
    wc.hInstance     = m_hInstance;
    wc.hIcon         = ::LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor       = ::LoadCursor(NULL, IDC_ARROW);
    wc.lpszClassName = getWindowClassName();
    wc.hIconSm       = ::LoadIcon(NULL, IDI_APPLICATION);   

    // Register it
    if ( !::RegisterClassEx(&wc) )
    {
        ::MessageBox(HWND_DESKTOP, L"RegisterClass() failed!", L"DXWindow", MB_ICONERROR|MB_OK);
        return false;
    }

    // Let Windows(tm) calculate the window size so our canvas is as big as we want it to have.
    if (m_settings.fullscreen == false )
    {
        m_wnd_rect.left = 0;
        m_wnd_rect.right = static_cast<long>(settings.width);
        m_wnd_rect.bottom = static_cast<long>(settings.height);
        m_wnd_rect.top = 0; 
        ::AdjustWindowRectEx(&m_wnd_rect, m_dwStyle, FALSE, WS_EX_APPWINDOW);

        m_real_window_height = (m_wnd_rect.right-m_wnd_rect.left);
        m_real_window_width  = (m_wnd_rect.bottom-m_wnd_rect.top);
    }
    else
    {
        m_wnd_rect.left = 0;
        m_wnd_rect.right = static_cast<long>(settings.width);
        m_wnd_rect.bottom = static_cast<long>(settings.height);
        m_wnd_rect.top = 0; 

        m_real_window_height = (m_wnd_rect.right-m_wnd_rect.left);
        m_real_window_width  = (m_wnd_rect.bottom-m_wnd_rect.top);
    }

    // Create Window
    m_hwnd = ::CreateWindowEx(WS_EX_APPWINDOW, 
                              getWindowClassName(), 
                              L"",  
                              m_dwStyle|WS_CLIPCHILDREN|WS_CLIPSIBLINGS,
                              50, 50, 
                              m_wnd_rect.right-m_wnd_rect.left,
                              m_wnd_rect.bottom-m_wnd_rect.top,	
                              NULL, 
                              NULL, 
                              m_hInstance, 
                              NULL);

    // Window creation failed for some reason. 
    if ( m_hwnd == NULL )
    {
        ::MessageBox(HWND_DESKTOP, L"CreateWindowEx() failed!", L"NightLight2D", MB_ICONERROR|MB_OK);
        ::UnregisterClass(getWindowClassName(), m_hInstance);
        return false;
    }    

    // Go fullscreen 
    // TODO: This code fails. 
    if ( m_settings.fullscreen )
    {
        DEVMODE dmVideoMode;				
        memset(&dmVideoMode,0,sizeof(dmVideoMode));		
        dmVideoMode.dmSize       = sizeof(dmVideoMode);		
        dmVideoMode.dmPelsWidth	 = static_cast<DWORD>(m_settings.width);
        dmVideoMode.dmPelsHeight = static_cast<DWORD>(m_settings.height);
        dmVideoMode.dmBitsPerPel = m_settings.bpp;
        dmVideoMode.dmFields     = DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;

        int code = ::ChangeDisplaySettings(&dmVideoMode, CDS_FULLSCREEN);
        if ( code != DISP_CHANGE_SUCCESSFUL )
        {
            std::basic_string<wchar_t> err = L"ChangeDisplaySettings() failed: ";
            switch(code)
            {
            case DISP_CHANGE_BADDUALVIEW:
                {
                    err += L"DISP_CHANGE_BADDUALVIEW";
                    break;
                }
            case DISP_CHANGE_BADFLAGS:
                {
                    err += L"DISP_CHANGE_BADFLAGS";
                    break;
                }
            case DISP_CHANGE_BADMODE:
                {
                    err += L"DISP_CHANGE_BADMODE";
                    break;
                }
            case DISP_CHANGE_BADPARAM:
                {
                    err += L"DISP_CHANGE_BADPARAM";
                    break;
                }
            case DISP_CHANGE_FAILED:
                {
                    err += L"DISP_CHANGE_FAILED";
                    break;
                }
            case DISP_CHANGE_RESTART:
                {
                    err += L"DISP_CHANGE_RESTART";
                    break;
                }
            }
            ::MessageBox(HWND_DESKTOP, err.c_str(), L"NightLight2D", MB_ICONERROR|MB_OK);
            ::UnregisterClass(getWindowClassName(), m_hInstance);
            ::DestroyWindow((HWND)m_hwnd);
            m_quitEvent();
            return false;
        }
    }

    // Set the userpointer
    ::SetWindowLongPtr((HWND)m_hwnd, GWL_USERDATA, reinterpret_cast<long>(this));

    //Set caption
    ::SetWindowTextA((HWND)m_hwnd, m_settings.caption.c_str());

    // Show Window and bring to the foreground, so it is topmost for now.
    ::ShowWindow((HWND)m_hwnd, true);    
    ::SetForegroundWindow((HWND)m_hwnd);

    // Set creation of the window to true
    m_wasCreated = true;

    return true;
}

Das schlägt mit allen Auflösungen fehl, die mein Monitor kann. Es wird das Flag DISP_CHANGE_BADMODE geworfen.
Nur wieso?

[schmidt-webdesign.net]

Scorcher24 schrieb:

Das schlägt mit allen Auflösungen fehl, die mein Monitor kann. Es wird das Flag DISP_CHANGE_BADMODE geworfen.
Nur wieso?

Das gleiche Problem hatte ich auch mal. Es lag aber am ATI-Treiber. Verwendest du ebenfalls eine ATI-GraKa? Einige Treiber verlangen bei Bildschirmänderungen einen Neustart - dann wird ebenfalls DISP_CHANGE_BADMODE geworfen.

Und dann gibts es da noch den verflixt versteckten Parameter CDS_UPDATEREGISTRY ... aber lies mal selbst ...

[Ein ehemaliger Benutzer]

Ja, hab eine ATI. Habs aber grade hinbekommen.
Wenn ich das Feld DM_BITSPERPEL weglasse, dann geht es :).