d3dapp.cpp

游戏编程精华02－含有几十个游戏编程例子

        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 );
    }
    else
    {
        // Set fullscreen-mode style
        SetWindowLong( m_hWnd, GWL_STYLE, WS_POPUP|WS_SYSMENU|WS_VISIBLE );
    }
    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 OldMultiSampleType, NewMultiSampleType;

    // 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;
        OldMultiSampleType = pDevice->MultiSampleType;

        // New state is initially the same as the old state
        dwNewAdapter = dwOldAdapter;
        dwNewDevice  = dwOldDevice;
        dwNewMode    = dwOldMode;
        bNewWindowed = bOldWindowed;
        NewMultiSampleType = OldMultiSampleType;

        // 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
            if( dwNewAdapter != dwOldAdapter || dwNewDevice  != dwOldDevice  ||
                dwNewMode    != dwOldMode    || bNewWindowed != bOldWindowed ||
                NewMultiSampleType != OldMultiSampleType )
            {
                pd3dApp->m_dwAdapter = dwNewAdapter;

                pAdapter = &pd3dApp->m_Adapters[dwNewAdapter];
                pAdapter->dwCurrentDevice = dwNewDevice;

                pAdapter->devices[dwNewDevice].dwCurrentMode = dwNewMode;
                pAdapter->devices[dwNewDevice].bWindowed     = bNewWindowed;
                pAdapter->devices[dwNewDevice].MultiSampleType = NewMultiSampleType;

                EndDialog( hDlg, IDOK );
            }
            else
                EndDialog( hDlg, IDCANCEL );

            return TRUE;
        }
        else if( IDCANCEL == LOWORD(wParam) )
        {
            // Handle the case when the user hits the Cancel button
            EndDialog( hDlg, IDCANCEL );
            return TRUE;
        }
        else if( CBN_SELENDOK == HIWORD(wParam) )
        {
            if( LOWORD(wParam) == IDC_ADAPTER_COMBO )
            {
                dwNewAdapter = ComboBox_GetCurSel( hwndAdapterList );
                pAdapter     = &pd3dApp->m_Adapters[dwNewAdapter];

                dwNewDevice  = pAdapter->dwCurrentDevice;
                dwNewMode    = pAdapter->devices[dwNewDevice].dwCurrentMode;
                bNewWindowed = pAdapter->devices[dwNewDevice].bWindowed;
            }
            else if( LOWORD(wParam) == IDC_DEVICE_COMBO )
            {
                pAdapter     = &pd3dApp->m_Adapters[dwNewAdapter];

                dwNewDevice  = ComboBox_GetCurSel( hwndDeviceList );
                dwNewMode    = pAdapter->devices[dwNewDevice].dwCurrentMode;
                bNewWindowed = pAdapter->devices[dwNewDevice].bWindowed;
            }
            else if( LOWORD(wParam) == IDC_FULLSCREENMODES_COMBO )
            {
                dwNewMode = ComboBox_GetCurSel( hwndFullscreenModeList );
            }
            else if( LOWORD(wParam) == IDC_MULTISAMPLE_COMBO )
            {
                DWORD dwItem = ComboBox_GetCurSel( hwndMultiSampleList );
                NewMultiSampleType = (D3DMULTISAMPLE_TYPE)ComboBox_GetItemData( hwndMultiSampleList, dwItem );
            }
        }
        // Keep the UI current
        bUpdateDlgControls = TRUE;
    }

    // Update the dialog controls
    if( bUpdateDlgControls )
    {
        // Reset the content in each of the combo boxes
        ComboBox_ResetContent( hwndAdapterList );
        ComboBox_ResetContent( hwndDeviceList );
        ComboBox_ResetContent( hwndFullscreenModeList );
        ComboBox_ResetContent( hwndMultiSampleList );

        pAdapter = &pd3dApp->m_Adapters[dwNewAdapter];
        pDevice  = &pAdapter->devices[dwNewDevice];

        // Add a list of adapters to the adapter combo box
        for( DWORD a=0; a < pd3dApp->m_dwNumAdapters; a++ )
        {
            // Add device name to the combo box
            DWORD dwItem = ComboBox_AddString( hwndAdapterList,
                             pd3dApp->m_Adapters[a].d3dAdapterIdentifier.Description );

            // Set the item data to identify this adapter
            ComboBox_SetItemData( hwndAdapterList, dwItem, a );

            // Set the combobox selection on the current adapater
            if( a == dwNewAdapter )
                ComboBox_SetCurSel( hwndAdapterList, dwItem );
        }

        // Add a list of devices to the device combo box
        for( DWORD d=0; d < pAdapter->dwNumDevices; d++ )
        {
            // Add device name to the combo box
            DWORD dwItem = ComboBox_AddString( hwndDeviceList,
                                               pAdapter->devices[d].strDesc );

            // Set the item data to identify this device
            ComboBox_SetItemData( hwndDeviceList, dwItem, d );

            // Set the combobox selection on the current device
            if( d == dwNewDevice )
                ComboBox_SetCurSel( hwndDeviceList, dwItem );
        }

        // Add a list of modes to the mode combo box