dxut.cpp

在GPU上实现数值模拟技术（线性方程组）的通用架构

        hr = DXUTInit();
        if( FAILED(hr) )
            return hr;
    }
 
    WCHAR* strCachedWindowTitle = GetDXUTState().GetWindowTitle();
    GetWindowText( hWndFocus, strCachedWindowTitle, 255 );
    strCachedWindowTitle[255] = 0;

    // Get the window's initial style
    DWORD dwWindowStyle = GetWindowLong( hWndDeviceWindowed, GWL_STYLE );
    GetDXUTState().SetWinStyle( dwWindowStyle );
    GetDXUTState().SetWindowCreatedWithDefaultPositions( false );

    // Store the client and window rects of the windowed-mode device window
    RECT rcClient;
    GetClientRect( hWndDeviceWindowed, &rcClient );
    GetDXUTState().SetWindowClientRect( rcClient );

    RECT rcWindow;
    GetWindowRect( hWndDeviceWindowed, &rcWindow );
    GetDXUTState().SetWindowBoundsRect( rcWindow );

    GetDXUTState().SetWindowCreated( true );
    GetDXUTState().SetHWNDFocus( hWndFocus );
    GetDXUTState().SetHWNDDeviceFullScreen( hWndDeviceFullScreen );
    GetDXUTState().SetHWNDDeviceWindowed( hWndDeviceWindowed );

    return S_OK;
}


//--------------------------------------------------------------------------------------
// Creates a Direct3D device. If DXUTCreateWindow() or DXUTSetWindow() has not already 
// been called, it will call DXUTCreateWindow() with the default parameters.  
// Instead of calling this, you can call DXUTSetDevice() or DXUTCreateDeviceFromSettings() 
//--------------------------------------------------------------------------------------
HRESULT DXUTCreateDevice( UINT AdapterOrdinal, bool bWindowed, 
                          int nSuggestedWidth, int nSuggestedHeight,
                          LPDXUTCALLBACKISDEVICEACCEPTABLE pCallbackIsDeviceAcceptable,
                          LPDXUTCALLBACKMODIFYDEVICESETTINGS pCallbackModifyDeviceSettings )
{
    HRESULT hr;

    // Not allowed to call this from inside the device callbacks
    if( GetDXUTState().GetInsideDeviceCallback() )
        return DXUT_ERR_MSGBOX( L"DXUTCreateWindow", E_FAIL );

    // Record the function arguments in the global state 
    GetDXUTState().SetIsDeviceAcceptableFunc( pCallbackIsDeviceAcceptable );
    GetDXUTState().SetModifyDeviceSettingsFunc( pCallbackModifyDeviceSettings );

    GetDXUTState().SetDeviceCreateCalled( true );

    // If DXUTCreateWindow() or DXUTSetWindow() has not already been called, 
    // then call DXUTCreateWindow() with the default parameters.         
    if( !GetDXUTState().GetWindowCreated() ) 
    {
        // If DXUTCreateWindow() or DXUTSetWindow() was already called and failed, then fail.
        // DXUTCreateWindow() or DXUTSetWindow() must first succeed for this function to succeed
        if( GetDXUTState().GetWindowCreateCalled() )
            return E_FAIL; 

        // If DXUTCreateWindow() or DXUTSetWindow() hasn't been called, then 
        // automatically call DXUTCreateWindow() with default params
        hr = DXUTCreateWindow();
        if( FAILED(hr) )
            return hr;
    }

    // Force an enumeration with the new IsDeviceAcceptable callback
    DXUTPrepareEnumerationObject( true );

    DXUTMatchOptions matchOptions;
    matchOptions.eAdapterOrdinal     = DXUTMT_PRESERVE_INPUT;
    matchOptions.eDeviceType         = DXUTMT_IGNORE_INPUT;
    matchOptions.eWindowed           = DXUTMT_PRESERVE_INPUT;
    matchOptions.eAdapterFormat      = DXUTMT_IGNORE_INPUT;
    matchOptions.eVertexProcessing   = DXUTMT_IGNORE_INPUT;
    matchOptions.eResolution         = DXUTMT_CLOSEST_TO_INPUT;
    matchOptions.eBackBufferFormat   = DXUTMT_IGNORE_INPUT;
    matchOptions.eBackBufferCount    = DXUTMT_IGNORE_INPUT;
    matchOptions.eMultiSample        = DXUTMT_IGNORE_INPUT;
    matchOptions.eSwapEffect         = DXUTMT_IGNORE_INPUT;
    matchOptions.eDepthFormat        = DXUTMT_IGNORE_INPUT;
    matchOptions.eStencilFormat      = DXUTMT_IGNORE_INPUT;
    matchOptions.ePresentFlags       = DXUTMT_IGNORE_INPUT;
    matchOptions.eRefreshRate        = DXUTMT_IGNORE_INPUT;
    matchOptions.ePresentInterval    = DXUTMT_IGNORE_INPUT;

    DXUTDeviceSettings deviceSettings;
    ZeroMemory( &deviceSettings, sizeof(DXUTDeviceSettings) );
    deviceSettings.AdapterOrdinal      = AdapterOrdinal;
    deviceSettings.pp.Windowed         = bWindowed;
    deviceSettings.pp.BackBufferWidth  = nSuggestedWidth;
    deviceSettings.pp.BackBufferHeight = nSuggestedHeight;

    // Override with settings from the command line
    if( GetDXUTState().GetOverrideWidth() != 0 )
        deviceSettings.pp.BackBufferWidth = GetDXUTState().GetOverrideWidth();
    if( GetDXUTState().GetOverrideHeight() != 0 )
        deviceSettings.pp.BackBufferHeight = GetDXUTState().GetOverrideHeight();

    if( GetDXUTState().GetOverrideAdapterOrdinal() != -1 )
        deviceSettings.AdapterOrdinal = GetDXUTState().GetOverrideAdapterOrdinal();

    if( GetDXUTState().GetOverrideFullScreen() )
    {
        deviceSettings.pp.Windowed = FALSE;
        if( GetDXUTState().GetOverrideWidth() == 0 && GetDXUTState().GetOverrideHeight() == 0 )
            matchOptions.eResolution = DXUTMT_IGNORE_INPUT;
    }
    if( GetDXUTState().GetOverrideWindowed() )
        deviceSettings.pp.Windowed = TRUE;

    if( GetDXUTState().GetOverrideForceHAL() )
    {
        deviceSettings.DeviceType = D3DDEVTYPE_HAL;
        matchOptions.eDeviceType = DXUTMT_PRESERVE_INPUT;
    }
    if( GetDXUTState().GetOverrideForceREF() )
    {
        deviceSettings.DeviceType = D3DDEVTYPE_REF;
        matchOptions.eDeviceType = DXUTMT_PRESERVE_INPUT;
    }

    if( GetDXUTState().GetOverrideForcePureHWVP() )
    {
        deviceSettings.BehaviorFlags = D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_PUREDEVICE;
        matchOptions.eVertexProcessing = DXUTMT_PRESERVE_INPUT;
    }
    else if( GetDXUTState().GetOverrideForceHWVP() )
    {
        deviceSettings.BehaviorFlags = D3DCREATE_HARDWARE_VERTEXPROCESSING;
        matchOptions.eVertexProcessing = DXUTMT_PRESERVE_INPUT;
    }
    else if( GetDXUTState().GetOverrideForceSWVP() )
    {
        deviceSettings.BehaviorFlags = D3DCREATE_SOFTWARE_VERTEXPROCESSING;
        matchOptions.eVertexProcessing = DXUTMT_PRESERVE_INPUT;
    }

    hr = DXUTFindValidDeviceSettings( &deviceSettings, &deviceSettings, &matchOptions );
    if( FAILED(hr) ) // the call will fail if no valid devices were found
    {
        DXUTDisplayErrorMessage( hr );
        return DXUT_ERR( L"DXUTFindValidDeviceSettings", hr );
    }

    // If the ModifyDeviceSettings callback is non-NULL, then call it to 
    // let the app change the settings
    if( pCallbackModifyDeviceSettings )
    {
        D3DCAPS9 caps;
        IDirect3D9* pD3D = DXUTGetD3DObject();
        pD3D->GetDeviceCaps( deviceSettings.AdapterOrdinal, deviceSettings.DeviceType, &caps );

        pCallbackModifyDeviceSettings( &deviceSettings, &caps );
    }

    // Change to a Direct3D device created from the new device settings.  
    // If there is an existing device, then either reset or recreated the scene
    hr = DXUTChangeDevice( &deviceSettings, NULL, false );
    if( FAILED(hr) )
        return hr;

    return S_OK;
}


//--------------------------------------------------------------------------------------
// Passes a previously created Direct3D device for use by the framework.  
// If DXUTCreateWindow() has not already been called, it will call it with the 
// default parameters.  Instead of calling this, you can call DXUTCreateDevice() or 
// DXUTCreateDeviceFromSettings() 
//--------------------------------------------------------------------------------------
HRESULT DXUTSetDevice( IDirect3DDevice9* pd3dDevice )
{
    HRESULT hr;

    if( pd3dDevice == NULL )
        return DXUT_ERR_MSGBOX( L"DXUTSetDevice", E_INVALIDARG );

    // Not allowed to call this from inside the device callbacks
    if( GetDXUTState().GetInsideDeviceCallback() )
        return DXUT_ERR_MSGBOX( L"DXUTCreateWindow", E_FAIL );

    GetDXUTState().SetDeviceCreateCalled( true );

    // If DXUTCreateWindow() or DXUTSetWindow() has not already been called, 
    // then call DXUTCreateWindow() with the default parameters.         
    if( !GetDXUTState().GetWindowCreated() ) 
    {
        // If DXUTCreateWindow() or DXUTSetWindow() was already called and failed, then fail.
        // DXUTCreateWindow() or DXUTSetWindow() must first succeed for this function to succeed
        if( GetDXUTState().GetWindowCreateCalled() )
            return E_FAIL; 

        // If DXUTCreateWindow() or DXUTSetWindow() hasn't been called, then 
        // automatically call DXUTCreateWindow() with default params
        hr = DXUTCreateWindow();
        if( FAILED(hr) )
            return hr;
    }

    DXUTDeviceSettings* pDeviceSettings = new DXUTDeviceSettings;
    if( pDeviceSettings == NULL )
        return E_OUTOFMEMORY;
    ZeroMemory( pDeviceSettings, sizeof(DXUTDeviceSettings) );

    // Get the present params from the swap chain
    IDirect3DSurface9* pBackBuffer = NULL;
    hr = pd3dDevice->GetBackBuffer( 0, 0, D3DBACKBUFFER_TYPE_MONO, &pBackBuffer );
    if( SUCCEEDED(hr) )
    {
        IDirect3DSwapChain9* pSwapChain = NULL;
        hr = pBackBuffer->GetContainer( IID_IDirect3DSwapChain9, (void**) &pSwapChain );
        if( SUCCEEDED(hr) )
        {
            pSwapChain->GetPresentParameters( &pDeviceSettings->pp );
            SAFE_RELEASE( pSwapChain );
        }

        SAFE_RELEASE( pBackBuffer );
    }

    D3DDEVICE_CREATION_PARAMETERS d3dCreationParams;
    pd3dDevice->GetCreationParameters( &d3dCreationParams );

    // Fill out the rest of the device settings struct
    pDeviceSettings->AdapterOrdinal = d3dCreationParams.AdapterOrdinal;
    pDeviceSettings->DeviceType     = d3dCreationParams.DeviceType;
    DXUTFindAdapterFormat( pDeviceSettings->AdapterOrdinal, pDeviceSettings->DeviceType, 
                           pDeviceSettings->pp.BackBufferFormat, pDeviceSettings->pp.Windowed, 
                           &pDeviceSettings->AdapterFormat );
    pDeviceSettings->BehaviorFlags  = d3dCreationParams.BehaviorFlags;

    // Change to the Direct3D device passed in
    hr = DXUTChangeDevice( pDeviceSettings, pd3dDevice, false );
    if( FAILED(hr) ) 
        return hr;

    return S_OK;
}


//--------------------------------------------------------------------------------------
// Tells the framework to change to a device created from the passed in device settings
// If DXUTCreateWindow() has not already been called, it will call it with the 
// default parameters.  Instead of calling this, you can call DXUTCreateDevice() 
// or DXUTSetDevice() 
//--------------------------------------------------------------------------------------
HRESULT DXUTCreateDeviceFromSettings( DXUTDeviceSettings* pDeviceSettings, bool bPreserveInput )
{
    HRESULT hr;

    GetDXUTState().SetDeviceCreateCalled( true );

    // If DXUTCreateWindow() or DXUTSetWindow() has not already been called, 
    // then call DXUTCreateWindow() with the default parameters.         
    if( !GetDXUTState().GetWindowCreated() ) 
    {
        // If DXUTCreateWindow() or DXUTSetWindow() was already called and failed, then fail.
        // DXUTCreateWindow() or DXUTSetWindow() must first succeed for this function to succeed
        if( GetDXUTState().GetWindowCreateCalled() )
            return E_FAIL; 

        // If DXUTCreateWindow() or DXUTSetWindow() hasn't been called, then 
        // automatically call DXUTCreateWindow() with default params
        hr = DXUTCreateWindow();
        if( FAILED(hr) )
            return hr;
    }

    if( !bPreserveInput )
    {
        // If not preserving the input, then find the closest valid to it
        DXUTMatchOptions matchOptions;
        matchOptions.eAdapterOrdinal     = DXUTMT_CLOSEST_TO_INPUT;
        matchOptions.eDeviceType         = DXUTMT_CLOSEST_TO_INPUT;
        matchOptions.eWindowed           = DXUTMT_CLOSEST_TO_INPUT;
        matchOptions.eAdapterFormat      = DXUTMT_CLOSEST_TO_INPUT;