d3dapp.cpp

windows游戏编程中关于“草”的源码及源程序

    pBackBuffer->Release();

    // Set up the fullscreen cursor
    if( m_bShowCursorWhenFullscreen && !m_bWindowed )
    {
        HCURSOR hCursor;
#ifdef _WIN64
        hCursor = (HCURSOR)GetClassLongPtr( m_hWnd, GCLP_HCURSOR );
#else
        hCursor = (HCURSOR)GetClassLong( m_hWnd, GCL_HCURSOR );
#endif
        D3DUtil_SetDeviceCursor( m_pd3dDevice, hCursor, TRUE );
        m_pd3dDevice->ShowCursor( TRUE );
    }

    // Confine cursor to fullscreen window
    if( m_bClipCursorWhenFullscreen )
    {
        if (!m_bWindowed )
        {
            RECT rcWindow;
            GetWindowRect( m_hWnd, &rcWindow );
            ClipCursor( &rcWindow );
        }
        else
        {
            ClipCursor( NULL );
        }
    }

    // Initialize the app's device-dependent objects
    hr = RestoreDeviceObjects();
    if( FAILED(hr) )
        return hr;

    // If the app is paused, trigger the rendering of the current frame
    if( FALSE == m_bFrameMoving )
    {
        m_bSingleStep = TRUE;
        DXUtil_Timer( TIMER_START );
        DXUtil_Timer( TIMER_STOP );
    }

    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: ToggleFullScreen()
// Desc: Called when user toggles between fullscreen mode and windowed mode
//-----------------------------------------------------------------------------
HRESULT CD3DApplication::ToggleFullscreen()
{
    // Get access to current adapter, device, and mode
    D3DAdapterInfo* pAdapterInfo = &m_Adapters[m_dwAdapter];
    D3DDeviceInfo*  pDeviceInfo  = &pAdapterInfo->devices[pAdapterInfo->dwCurrentDevice];
    D3DModeInfo*    pModeInfo    = &pDeviceInfo->modes[pDeviceInfo->dwCurrentMode];

    // Need device change if going windowed and the current device
    // can only be fullscreen
    if( !m_bWindowed && !pDeviceInfo->bCanDoWindowed )
        return ForceWindowed();

    m_bReady = FALSE;

    // Toggle the windowed state
    m_bWindowed = !m_bWindowed;
    pDeviceInfo->bWindowed = m_bWindowed;

    // Prepare window for windowed/fullscreen change
    AdjustWindowForChange();

    // Set up the presentation parameters
    m_d3dpp.Windowed               = pDeviceInfo->bWindowed;
    if( m_bWindowed )
        m_d3dpp.MultiSampleType    = pDeviceInfo->MultiSampleTypeWindowed;
    else
        m_d3dpp.MultiSampleType    = pDeviceInfo->MultiSampleTypeFullscreen;
    m_d3dpp.AutoDepthStencilFormat = pModeInfo->DepthStencilFormat;
    m_d3dpp.hDeviceWindow          = m_hWnd;
    if( m_bWindowed )
    {
        m_d3dpp.BackBufferWidth  = m_rcWindowClient.right - m_rcWindowClient.left;
        m_d3dpp.BackBufferHeight = m_rcWindowClient.bottom - m_rcWindowClient.top;
        m_d3dpp.BackBufferFormat = pAdapterInfo->d3ddmDesktop.Format;
    }
    else
    {
        m_d3dpp.BackBufferWidth  = pModeInfo->Width;
        m_d3dpp.BackBufferHeight = pModeInfo->Height;
        m_d3dpp.BackBufferFormat = pModeInfo->Format;
    }

    // Resize the 3D device
    if( FAILED( Resize3DEnvironment() ) )
    {
        if( m_bWindowed )
            return ForceWindowed();
        else
            return E_FAIL;
    }

    // When moving from fullscreen to windowed mode, it is important to
    // adjust the window size after resetting the device rather than
    // beforehand to ensure that you get the window size you want.  For
    // example, when switching from 640x480 fullscreen to windowed with
    // a 1000x600 window on a 1024x768 desktop, it is impossible to set
    // the window size to 1000x600 until after the display mode has
    // changed to 1024x768, because windows cannot be larger than the
    // desktop.
    if( m_bWindowed )
    {
        SetWindowPos( m_hWnd, HWND_NOTOPMOST,
                      m_rcWindowBounds.left, m_rcWindowBounds.top,
                      ( m_rcWindowBounds.right - m_rcWindowBounds.left ),
                      ( m_rcWindowBounds.bottom - m_rcWindowBounds.top ),
                      SWP_SHOWWINDOW );
    }

    m_bReady = TRUE;

    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: ForceWindowed()
// Desc: Switch to a windowed mode, even if that means picking a new device
//       and/or adapter
//-----------------------------------------------------------------------------
HRESULT CD3DApplication::ForceWindowed()
{
    HRESULT hr;
    D3DAdapterInfo* pAdapterInfoCur = &m_Adapters[m_dwAdapter];
    D3DDeviceInfo*  pDeviceInfoCur  = &pAdapterInfoCur->devices[pAdapterInfoCur->dwCurrentDevice];
    BOOL bFoundDevice = FALSE;

    if( pDeviceInfoCur->bCanDoWindowed )
    {
        bFoundDevice = TRUE;
    }
    else
    {
        // Look for a windowable device on any adapter
        D3DAdapterInfo* pAdapterInfo;
        DWORD dwAdapter;
        D3DDeviceInfo* pDeviceInfo;
        DWORD dwDevice;
        for( dwAdapter = 0; dwAdapter < m_dwNumAdapters; dwAdapter++ )
        {
            pAdapterInfo = &m_Adapters[dwAdapter];
            for( dwDevice = 0; dwDevice < pAdapterInfo->dwNumDevices; dwDevice++ )
            {
                pDeviceInfo = &pAdapterInfo->devices[dwDevice];
                if( pDeviceInfo->bCanDoWindowed )
                {
                    m_dwAdapter = dwAdapter;
                    pDeviceInfoCur = pDeviceInfo;
                    pAdapterInfo->dwCurrentDevice = dwDevice;
                    bFoundDevice = TRUE;
                    break;
                }
            }
            if( bFoundDevice )
                break;
        }
    }

    if( !bFoundDevice )
        return E_FAIL;

    pDeviceInfoCur->bWindowed = TRUE;
    m_bWindowed = TRUE;

    // Now destroy the current 3D device objects, then reinitialize

    m_bReady = FALSE;

    // Release all scene objects that will be re-created for the new device
    InvalidateDeviceObjects();
    DeleteDeviceObjects();

    // Release display objects, so a new device can be created
    if( m_pd3dDevice->Release() > 0L )
        return DisplayErrorMsg( D3DAPPERR_NONZEROREFCOUNT, MSGERR_APPMUSTEXIT );

    // Create the new device
    if( FAILED( hr = Initialize3DEnvironment() ) )
        return DisplayErrorMsg( hr, MSGERR_APPMUSTEXIT );
    m_bReady = TRUE;

    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: AdjustWindowForChange()
// Desc: Prepare the window for a possible change between windowed mode and
//       fullscreen mode.  This function is virtual and thus can be overridden
//       to provide different behavior, such as switching to an entirely
//       different window for fullscreen mode (as in the MFC sample apps).
//-----------------------------------------------------------------------------
HRESULT CD3DApplication::AdjustWindowForChange()
{
    if( m_bWindowed )
    {
        // Set windowed-mode style
        SetWindowLong( m_hWnd, GWL_STYLE, m_dwWindowStyle );
        if( m_hMenu != NULL )
            SetMenu( m_hWnd, m_hMenu );
    }
    else
    {
        // Set fullscreen-mode style
        SetWindowLong( m_hWnd, GWL_STYLE, WS_POPUP|WS_SYSMENU|WS_VISIBLE );
        m_hMenu = (HMENU)SetMenu( m_hWnd, NULL );
    }
    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: UserSelectNewDevice()
// Desc: Displays a dialog so the user can select a new adapter, device, or
//       display mode, and then recreates the 3D environment if needed
//-----------------------------------------------------------------------------
HRESULT CD3DApplication::UserSelectNewDevice()
{
    HRESULT hr;

    // Can't display dialogs in fullscreen mode
    if( m_bWindowed == FALSE )
    {
        if( FAILED( ToggleFullscreen() ) )
        {
            DisplayErrorMsg( D3DAPPERR_RESIZEFAILED, MSGERR_APPMUSTEXIT );
            return E_FAIL;
        }
    }

    // Prompt the user to change the mode
    if( IDOK != DialogBoxParam( (HINSTANCE)GetModuleHandle(NULL),
                                MAKEINTRESOURCE(IDD_SELECTDEVICE), m_hWnd,
                                SelectDeviceProc, (LPARAM)this ) )
        return S_OK;

    // Get access to the newly selected adapter, device, and mode
    DWORD dwDevice;
    dwDevice  = m_Adapters[m_dwAdapter].dwCurrentDevice;
    m_bWindowed = m_Adapters[m_dwAdapter].devices[dwDevice].bWindowed;

    // Release all scene objects that will be re-created for the new device
    InvalidateDeviceObjects();
    DeleteDeviceObjects();

    // Release display objects, so a new device can be created
    if( m_pd3dDevice->Release() > 0L )
        return DisplayErrorMsg( D3DAPPERR_NONZEROREFCOUNT, MSGERR_APPMUSTEXIT );

    // Inform the display class of the change. It will internally
    // re-create valid surfaces, a d3ddevice, etc.
    if( FAILED( hr = Initialize3DEnvironment() ) )
        return DisplayErrorMsg( hr, MSGERR_APPMUSTEXIT );

    // If the app is paused, trigger the rendering of the current frame
    if( FALSE == m_bFrameMoving )
    {
        m_bSingleStep = TRUE;
        DXUtil_Timer( TIMER_START );
        DXUtil_Timer( TIMER_STOP );
    }

    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: SelectDeviceProc()
// Desc: Windows message handling function for the device select dialog
//-----------------------------------------------------------------------------
INT_PTR CALLBACK CD3DApplication::SelectDeviceProc( HWND hDlg, UINT msg,
                                                    WPARAM wParam, LPARAM lParam )
{
    // Get access to the UI controls
    HWND hwndAdapterList        = GetDlgItem( hDlg, IDC_ADAPTER_COMBO );
    HWND hwndDeviceList         = GetDlgItem( hDlg, IDC_DEVICE_COMBO );
    HWND hwndFullscreenModeList = GetDlgItem( hDlg, IDC_FULLSCREENMODES_COMBO );
    HWND hwndWindowedRadio      = GetDlgItem( hDlg, IDC_WINDOW );
    HWND hwndFullscreenRadio    = GetDlgItem( hDlg, IDC_FULLSCREEN );
    HWND hwndMultiSampleList    = GetDlgItem( hDlg, IDC_MULTISAMPLE_COMBO );
    BOOL bUpdateDlgControls     = FALSE;

    // Static state for adapter/device/mode selection
    static CD3DApplication* pd3dApp;
    static DWORD  dwOldAdapter, dwNewAdapter;
    static DWORD  dwOldDevice,  dwNewDevice;
    static DWORD  dwOldMode,    dwNewMode;
    static BOOL   bOldWindowed, bNewWindowed;
    static D3DMULTISAMPLE_TYPE OldMultiSampleTypeWindowed, NewMultiSampleTypeWindowed;
    static D3DMULTISAMPLE_TYPE OldMultiSampleTypeFullscreen, NewMultiSampleTypeFullscreen;

    // Working variables
    D3DAdapterInfo* pAdapter;
    D3DDeviceInfo*  pDevice;

    // Handle the initialization message
    if( WM_INITDIALOG == msg )
    {
        // Old state
        pd3dApp      = (CD3DApplication*)lParam;
        dwOldAdapter = pd3dApp->m_dwAdapter;
        pAdapter     = &pd3dApp->m_Adapters[dwOldAdapter];

        dwOldDevice  = pAdapter->dwCurrentDevice;
        pDevice      = &pAdapter->devices[dwOldDevice];

        dwOldMode    = pDevice->dwCurrentMode;
        bOldWindowed = pDevice->bWindowed;
        OldMultiSampleTypeWindowed = pDevice->MultiSampleTypeWindowed;
        OldMultiSampleTypeFullscreen = pDevice->MultiSampleTypeFullscreen;

        // New state is initially the same as the old state
        dwNewAdapter = dwOldAdapter;
        dwNewDevice  = dwOldDevice;
        dwNewMode    = dwOldMode;
        bNewWindowed = bOldWindowed;
        NewMultiSampleTypeWindowed = OldMultiSampleTypeWindowed;
        NewMultiSampleTypeFullscreen = OldMultiSampleTypeFullscreen;

        // Set flag to update dialog controls below
        bUpdateDlgControls = TRUE;
    }

    if( WM_COMMAND == msg )
    {
        // Get current UI state
        bNewWindowed  = Button_GetCheck( hwndWindowedRadio );

        if( IDOK == LOWORD(wParam) )
        {
            // Handle the case when the user hits the OK button. Check if any
            // of the options were changed