Question

此处的代码将在GPU和捕获窗口屏幕中运行，它为我们提供ID3D11Texture2D资源。使用ID3D11DeviceContext::Map我将resource从BYTE缓冲区转移到BYTE缓冲区到CPU内存g_iMageBuffer，其中UCHAR。

现在我想进行逆向工程，我想把g_iMageBuffer缓冲区（CPU内存）放到ID3D11Texture2D（GPU内存）中。请有人帮助我如何进行逆向工程我是图形部分的新手。

//Variable Declaration
IDXGIOutputDuplication* IDeskDupl;
IDXGIResource*          lDesktopResource = nullptr;
DXGI_OUTDUPL_FRAME_INFO IFrameInfo;
ID3D11Texture2D*        IAcquiredDesktopImage;
ID3D11Texture2D*        lDestImage;
ID3D11DeviceContext*    lImmediateContext;
UCHAR*                  g_iMageBuffer=nullptr;

//Screen capture start here
hr = lDeskDupl->AcquireNextFrame(20, &lFrameInfo, &lDesktopResource);

// >QueryInterface for ID3D11Texture2D
hr = lDesktopResource->QueryInterface(IID_PPV_ARGS(&lAcquiredDesktopImage));
lDesktopResource.Release();

// Copy image into GDI drawing texture
lImmediateContext->CopyResource(lDestImage,lAcquiredDesktopImage);
lAcquiredDesktopImage.Release();
lDeskDupl->ReleaseFrame();  

// Copy GPU Resource to CPU
D3D11_TEXTURE2D_DESC desc;
lDestImage->GetDesc(&desc);
D3D11_MAPPED_SUBRESOURCE resource;
UINT subresource = D3D11CalcSubresource(0, 0, 0);
lImmediateContext->Map(lDestImage, subresource, D3D11_MAP_READ_WRITE, 0, &resource);

std::unique_ptr<BYTE> pBuf(new BYTE[resource.RowPitch*desc.Height]);
UINT lBmpRowPitch = lOutputDuplDesc.ModeDesc.Width * 4;
BYTE* sptr = reinterpret_cast<BYTE*>(resource.pData);
BYTE* dptr = pBuf.get() + resource.RowPitch*desc.Height - lBmpRowPitch;
UINT lRowPitch = std::min<UINT>(lBmpRowPitch, resource.RowPitch);

for (size_t h = 0; h < lOutputDuplDesc.ModeDesc.Height; ++h)
{
    memcpy_s(dptr, lBmpRowPitch, sptr, lRowPitch);
    sptr += resource.RowPitch;
    dptr -= lBmpRowPitch;
}

lImmediateContext->Unmap(lDestImage, subresource);
long g_captureSize=lRowPitch*desc.Height;
g_iMageBuffer= new UCHAR[g_captureSize];
g_iMageBuffer = (UCHAR*)malloc(g_captureSize);

//Copying to UCHAR buffer 
memcpy(g_iMageBuffer,pBuf,g_captureSize);

Answer 1

您不需要逆向工程。你所描述的被称为“加载纹理”。

How to: Initialize a Texture Programmatically
How to: Initialize a Texture From a File

由于您似乎是DirectX编程的新手，请考虑使用DirectX Tool Kit for DX11 tutorials。特别是，请务必阅读ComPtr和ThrowIfFailed上的部分。

如何将CPU内存（UCHAR缓冲区）带入GPU内存（ID3D11Texture2D资源）

1 个答案: