截图C++ directx获取黑色图像

Question

我正在尝试使用directx进行屏幕截图.我尝试了几页的代码,解释了如何但总是得到黑屏幕.如果有人可以帮助我,我将不胜感激.

我的代码是:

int _tmain(int argc, _TCHAR* argv[])
{
    IDirect3DDevice9* g_pd3dDevice;
    //SaveScreenShot("test.bmp",D3DXIFF_BMP);   
    IDirect3DSurface9* pSurface=NULL;
    //IDirect3DSurface9* pSource=NULL;
    D3DPRESENT_PARAMETERS d3dpp;
    ZeroMemory(&d3dpp, sizeof(d3dpp));
    d3dpp.Windowed = FALSE;
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpp.BackBufferFormat = D3DFMT_A8R8G8B8;
    d3dpp.BackBufferCount = 1;
    d3dpp.BackBufferWidth = 1280;
    d3dpp.BackBufferHeight = 1024;
    d3dpp.hDeviceWindow = GetDesktopWindow();
    d3dpp.FullScreen_RefreshRateInHz=0;
    d3dpp.MultiSampleQuality=0;
    IDirect3D9* direct=Direct3DCreate9(D3D9b_SDK_VERSION);
    direct->CreateDevice(D3DADAPTER_DEFAULT,
                         D3DDEVTYPE_HAL,
                         GetDesktopWindow(),
                         D3DCREATE_SOFTWARE_VERTEXPROCESSING,
                         &d3dpp,&g_pd3dDevice);


    //g_pd3dDevice->GetRenderTarget(0,&pSource);
    g_pd3dDevice->CreateOffscreenPlainSurface(1280, 1024,
        D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &pSurface, NULL);
    g_pd3dDevice->GetFrontBufferData(0, pSurface);
    /*g_pd3dDevice->GetRenderTargetData(pSource,pSurface);
    g_pd3dDevice->GetRenderTargetData(pSource,pSurface);*/
    D3DXSaveSurfaceToFile("Desktop.jpg",D3DXIFF_JPG,pSurface,NULL,NULL);
    pSurface->Release();
    //pSource->Release();
    return 0;
}

Answer 1

尝试添加一些错误处理,也许你会知道它失败的原因.