示例一:DirectX Window

Graphics类用于初始化Direct 3D

主流程:

仅需要粗体部分

try{        // Create Graphics object        graphics = new Graphics;        // Initialize Graphics, throws GameError        graphics->initialize(hwnd, GAME_WIDTH, GAME_HEIGHT, FULLSCREEN);        // main message loop        int done = 0;        while (!done)        {            // PeekMessage,non-blocking method for checking for Windows messages.            if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))             {                // look for quit message                if (msg.message == WM_QUIT)                    done = 1;                // decode and pass messages on to WinProc                TranslateMessage(&msg);                DispatchMessage(&msg);            } else                graphics->showBackbuffer();        }        SAFE_DELETE(graphics);  // free memory before exit        return msg.wParam;    }    catch(const GameError &err)    {        MessageBox(NULL, err.getMessage(), "Error", MB_OK);    }

1. Direct3DCreate9创建IDirect3D9
2. GetDeviceCaps测试是否支持硬件顶点支持
3. initD3Dpp初始化D3DPRESENT_PARAMETERS参数

   //=============================================================================// Initialize D3D presentation parameters//=============================================================================void Graphics::initD3Dpp(){    try{        ZeroMemory(&d3dpp, sizeof(d3dpp));              // fill the structure with 0        // fill in the parameters we need        d3dpp.BackBufferWidth   = width;        d3dpp.BackBufferHeight  = height;        if(fullscreen)                                  // if fullscreen            d3dpp.BackBufferFormat  = D3DFMT_X8R8G8B8;  // 24 bit color        else            d3dpp.BackBufferFormat  = D3DFMT_UNKNOWN;   // use desktop setting        d3dpp.BackBufferCount   = 1;        d3dpp.SwapEffect        = D3DSWAPEFFECT_DISCARD;        d3dpp.hDeviceWindow     = hwnd;        d3dpp.Windowed          = (!fullscreen);        d3dpp.PresentationInterval   = D3DPRESENT_INTERVAL_IMMEDIATE;    } catch(...)    {        throw(GameError(gameErrorNS::FATAL_ERROR,                 "Error initializing D3D presentation parameters"));    }}

4. CreateDevice
5. showBackbuffer

   //=============================================================================// Display the backbuffer//=============================================================================HRESULT Graphics::showBackbuffer(){    result = E_FAIL;    // default to fail, replace on success    // (this function will be moved in later versions)    // Clear the backbuffer to lime green     device3d->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,255,0), 0.0f, 0);    // Display backbuffer to screen    result = device3d->Present(NULL, NULL, NULL, NULL);    return result;}

 

//=============================================================================// Initialize DirectX graphics// throws GameError on error//=============================================================================void Graphics::initialize(HWND hw, int w, int h, bool full){    hwnd = hw;    width = w;    height = h;    fullscreen = full;    //initialize Direct3D    direct3d = Direct3DCreate9(D3D_SDK_VERSION);    if (direct3d == NULL)        throw(GameError(gameErrorNS::FATAL_ERROR, "Error initializing Direct3D"));    initD3Dpp();        // init D3D presentation parameters    // determine if graphics card supports harware texturing and lighting and vertex shaders    D3DCAPS9 caps;    DWORD behavior;    result = direct3d->GetDeviceCaps(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, &caps);    // If device doesn't support HW T&L or doesn't support 1.1 vertex     // shaders in hardware, then switch to software vertex processing.    if( (caps.DevCaps & D3DDEVCAPS_HWTRANSFORMANDLIGHT) == 0 ||            caps.VertexShaderVersion < D3DVS_VERSION(1,1) )        behavior = D3DCREATE_SOFTWARE_VERTEXPROCESSING;  // use software only processing    else        behavior = D3DCREATE_HARDWARE_VERTEXPROCESSING;  // use hardware only processing    //create Direct3D device    result = direct3d->CreateDevice(        D3DADAPTER_DEFAULT,        D3DDEVTYPE_HAL,        hwnd,        behavior,        &d3dpp,         &device3d);    if (FAILED(result))        throw(GameError(gameErrorNS::FATAL_ERROR, "Error creating Direct3D device")); }

示例二:DirectX Full Screen

见initD3Dpp方法的Windowed属性

参考:

示例三:DirectX Device Capabilities

获取指定显卡支持的显示模式

全屏时检测

1. GetAdapterModeCount:Returns the number of display modes available on this adapter.
2. EnumAdapterModes:

Queries the device to determine whether the specified adapter supports the requested format and display mode. This method could be used in a loop to enumerate all the available adapter modes.

bool Graphics::isAdapterCompatible(){    UINT modes = direct3d->GetAdapterModeCount(D3DADAPTER_DEFAULT,                                             d3dpp.BackBufferFormat);    for(UINT i=0; i
    
     EnumAdapterModes( D3DADAPTER_DEFAULT,                                         d3dpp.BackBufferFormat,                                        i, &pMode);        if( pMode.Height == d3dpp.BackBufferHeight &&            pMode.Width  == d3dpp.BackBufferWidth &&            pMode.RefreshRate >= d3dpp.FullScreen_RefreshRateInHz)            return true;    }    return false;}